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ladybird/Userland/Shell/AST.cpp
AnotherTest 3b8fa5a753 Shell: Add support for indexing into variables 
Now a variable may have an optional slice (only _one_ slice), which can
also use negative indices to index from the end.
This works on both lists and strings.
The contents of the slice have the same semantics as brace expansions.
For example:
```sh
$ x=(1 2 3 4 5 6)
$ echo $x[1..3] # select indices 1, 2, 3
2 3 4
$ echo $x[3,4,1,0] # select indices 3, 4, 1, 0 (in that order)
4 5 2 1
$ x="Well Hello Friends!"
$ echo $x[5..9]
Hello
```
2021-03-22 13:15:08 +01:00

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/*
* Copyright (c) 2020, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "AST.h"
#include "Shell.h"
#include <AK/MemoryStream.h>
#include <AK/ScopeGuard.h>
#include <AK/ScopedValueRollback.h>
#include <AK/String.h>
#include <AK/StringBuilder.h>
#include <AK/URL.h>
#include <LibCore/EventLoop.h>
#include <LibCore/File.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
void AK::Formatter<Shell::AST::Command>::format(FormatBuilder& builder, const Shell::AST::Command& value)
{
if (m_sign_mode != FormatBuilder::SignMode::Default)
VERIFY_NOT_REACHED();
if (m_alternative_form)
VERIFY_NOT_REACHED();
if (m_zero_pad)
VERIFY_NOT_REACHED();
if (m_mode != Mode::Default && m_mode != Mode::String)
VERIFY_NOT_REACHED();
if (m_width.has_value())
VERIFY_NOT_REACHED();
if (m_precision.has_value())
VERIFY_NOT_REACHED();
if (value.argv.is_empty()) {
builder.put_literal("(ShellInternal)");
} else {
bool first = true;
for (auto& arg : value.argv) {
if (!first)
builder.put_literal(" ");
first = false;
builder.put_literal(arg);
}
}
for (auto& redir : value.redirections) {
builder.put_padding(' ', 1);
if (redir.is_path_redirection()) {
auto path_redir = (const Shell::AST::PathRedirection*)&redir;
builder.put_i64(path_redir->fd);
switch (path_redir->direction) {
case Shell::AST::PathRedirection::Read:
builder.put_literal("<");
break;
case Shell::AST::PathRedirection::Write:
builder.put_literal(">");
break;
case Shell::AST::PathRedirection::WriteAppend:
builder.put_literal(">>");
break;
case Shell::AST::PathRedirection::ReadWrite:
builder.put_literal("<>");
break;
}
builder.put_literal(path_redir->path);
} else if (redir.is_fd_redirection()) {
auto* fdredir = (const Shell::AST::FdRedirection*)&redir;
builder.put_i64(fdredir->new_fd);
builder.put_literal(">");
builder.put_i64(fdredir->old_fd);
} else if (redir.is_close_redirection()) {
auto close_redir = (const Shell::AST::CloseRedirection*)&redir;
builder.put_i64(close_redir->fd);
builder.put_literal(">&-");
} else {
VERIFY_NOT_REACHED();
}
}
if (!value.next_chain.is_empty()) {
for (auto& command : value.next_chain) {
switch (command.action) {
case Shell::AST::NodeWithAction::And:
builder.put_literal(" && ");
break;
case Shell::AST::NodeWithAction::Or:
builder.put_literal(" || ");
break;
case Shell::AST::NodeWithAction::Sequence:
builder.put_literal("; ");
break;
}
builder.put_literal("(");
builder.put_literal(command.node->class_name());
builder.put_literal("...)");
}
}
if (!value.should_wait)
builder.put_literal("&");
}
namespace Shell::AST {
static inline void print_indented(const String& str, int indent)
{
dbgln("{}{}", String::repeated(' ', indent * 2), str);
}
static inline Optional<Position> merge_positions(const Optional<Position>& left, const Optional<Position>& right)
{
if (!left.has_value())
return right;
if (!right.has_value())
return left;
return Position {
.start_offset = left->start_offset,
.end_offset = right->end_offset,
.start_line = left->start_line,
.end_line = right->end_line,
};
}
static inline Vector<Command> join_commands(Vector<Command> left, Vector<Command> right)
{
Command command;
auto last_in_left = left.take_last();
auto first_in_right = right.take_first();
command.argv.append(last_in_left.argv);
command.argv.append(first_in_right.argv);
command.redirections.append(last_in_left.redirections);
command.redirections.append(first_in_right.redirections);
command.should_wait = first_in_right.should_wait && last_in_left.should_wait;
command.is_pipe_source = first_in_right.is_pipe_source;
command.should_notify_if_in_background = first_in_right.should_notify_if_in_background || last_in_left.should_notify_if_in_background;
command.position = merge_positions(last_in_left.position, first_in_right.position);
Vector<Command> commands;
commands.append(left);
commands.append(command);
commands.append(right);
return commands;
}
static String resolve_slices(RefPtr<Shell> shell, String&& input_value, NonnullRefPtrVector<Slice> slices)
{
if (slices.is_empty())
return move(input_value);
for (auto& slice : slices) {
auto value = slice.run(shell);
if (!value) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, "Invalid slice contents", slice.position());
return move(input_value);
}
auto index_values = value->resolve_as_list(shell);
Vector<size_t> indices;
indices.ensure_capacity(index_values.size());
size_t i = 0;
for (auto& value : index_values) {
auto maybe_index = value.to_int();
if (!maybe_index.has_value()) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, String::formatted("Invalid value in slice index {}: {} (expected a number)", i, value), slice.position());
return move(input_value);
}
++i;
auto index = maybe_index.value();
auto original_index = index;
if (index < 0)
index += input_value.length();
if (index < 0 || (size_t)index >= input_value.length()) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, String::formatted("Slice index {} (evaluated as {}) out of value bounds [0-{})", index, original_index, input_value.length()), slice.position());
return move(input_value);
}
indices.unchecked_append(index);
}
StringBuilder builder { indices.size() };
for (auto& index : indices)
builder.append(input_value[index]);
input_value = builder.build();
}
return move(input_value);
}
static Vector<String> resolve_slices(RefPtr<Shell> shell, Vector<String>&& values, NonnullRefPtrVector<Slice> slices)
{
if (slices.is_empty())
return move(values);
for (auto& slice : slices) {
auto value = slice.run(shell);
if (!value) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, "Invalid slice contents", slice.position());
return move(values);
}
auto index_values = value->resolve_as_list(shell);
Vector<size_t> indices;
indices.ensure_capacity(index_values.size());
size_t i = 0;
for (auto& value : index_values) {
auto maybe_index = value.to_int();
if (!maybe_index.has_value()) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, String::formatted("Invalid value in slice index {}: {} (expected a number)", i, value), slice.position());
return move(values);
}
++i;
auto index = maybe_index.value();
auto original_index = index;
if (index < 0)
index += values.size();
if (index < 0 || (size_t)index >= values.size()) {
shell->raise_error(Shell::ShellError::InvalidSliceContentsError, String::formatted("Slice index {} (evaluated as {}) out of value bounds [0-{})", index, original_index, values.size()), slice.position());
return move(values);
}
indices.unchecked_append(index);
}
Vector<String> result;
result.ensure_capacity(indices.size());
for (auto& index : indices)
result.unchecked_append(values[index]);
values = move(result);
}
return move(values);
}
void Node::for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback)
{
auto value = run(shell)->resolve_without_cast(shell);
if (value->is_job()) {
callback(value);
return;
}
if (value->is_list_without_resolution()) {
auto list = value->resolve_without_cast(shell);
for (auto& element : static_cast<ListValue*>(list.ptr())->values()) {
if (callback(element) == IterationDecision::Break)
break;
}
return;
}
auto list = value->resolve_as_list(shell);
for (auto& element : list) {
if (callback(create<StringValue>(move(element))) == IterationDecision::Break)
break;
}
}
Vector<Command> Node::to_lazy_evaluated_commands(RefPtr<Shell> shell)
{
if (would_execute()) {
// Wrap the node in a "should immediately execute next" command.
return {
Command { {}, {}, true, false, true, true, {}, { NodeWithAction(*this, NodeWithAction::Sequence) }, position() }
};
}
return run(shell)->resolve_as_commands(shell);
}
void Node::dump(int level) const
{
print_indented(String::formatted("{} at {}:{} (from {}.{} to {}.{})",
class_name().characters(),
m_position.start_offset,
m_position.end_offset,
m_position.start_line.line_number,
m_position.start_line.line_column,
m_position.end_line.line_number,
m_position.end_line.line_column),
level);
}
Node::Node(Position position)
: m_position(position)
{
}
Vector<Line::CompletionSuggestion> Node::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (matching_node) {
if (matching_node->is_bareword()) {
auto* node = static_cast<BarewordLiteral*>(matching_node.ptr());
auto corrected_offset = find_offset_into_node(node->text(), offset - matching_node->position().start_offset);
if (corrected_offset > node->text().length())
return {};
auto& text = node->text();
// If the literal isn't an option, treat it as a path.
if (!(text.starts_with("-") || text == "--" || text == "-"))
return shell.complete_path("", text, corrected_offset);
// If the literal is an option, we have to know the program name
// should we have no way to get that, bail early.
if (!hit_test_result.closest_command_node)
return {};
auto program_name_node = hit_test_result.closest_command_node->leftmost_trivial_literal();
if (!program_name_node)
return {};
String program_name;
if (program_name_node->is_bareword())
program_name = static_cast<BarewordLiteral*>(program_name_node.ptr())->text();
else
program_name = static_cast<StringLiteral*>(program_name_node.ptr())->text();
return shell.complete_option(program_name, text, corrected_offset);
}
return {};
}
auto result = hit_test_position(offset);
if (!result.matching_node)
return {};
auto node = result.matching_node;
if (node->is_bareword() || node != result.closest_node_with_semantic_meaning)
node = result.closest_node_with_semantic_meaning;
if (!node)
return {};
return node->complete_for_editor(shell, offset, result);
}
Vector<Line::CompletionSuggestion> Node::complete_for_editor(Shell& shell, size_t offset)
{
return Node::complete_for_editor(shell, offset, { nullptr, nullptr, nullptr });
}
Node::~Node()
{
}
void And::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> And::run(RefPtr<Shell> shell)
{
auto commands = m_left->to_lazy_evaluated_commands(shell);
commands.last().next_chain.append(NodeWithAction { *m_right, NodeWithAction::And });
return create<CommandSequenceValue>(move(commands));
}
void And::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
metadata.is_first_in_list = true;
m_left->highlight_in_editor(editor, shell, metadata);
m_right->highlight_in_editor(editor, shell, metadata);
}
HitTestResult And::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
result = m_right->hit_test_position(offset);
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
And::And(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right, Position and_position)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
, m_and_position(and_position)
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
And::~And()
{
}
void ListConcatenate::dump(int level) const
{
Node::dump(level);
for (auto& element : m_list)
element->dump(level + 1);
}
RefPtr<Value> ListConcatenate::run(RefPtr<Shell> shell)
{
RefPtr<Value> result = nullptr;
for (auto& element : m_list) {
if (!result) {
result = create<ListValue>({ element->run(shell)->resolve_without_cast(shell) });
continue;
}
auto element_value = element->run(shell)->resolve_without_cast(shell);
if (result->is_command() || element_value->is_command()) {
auto joined_commands = join_commands(result->resolve_as_commands(shell), element_value->resolve_as_commands(shell));
if (joined_commands.size() == 1) {
auto& command = joined_commands[0];
command.position = position();
result = create<CommandValue>(command);
} else {
result = create<CommandSequenceValue>(move(joined_commands));
}
} else {
NonnullRefPtrVector<Value> values;
if (result->is_list_without_resolution()) {
values.append(static_cast<ListValue*>(result.ptr())->values());
} else {
for (auto& result : result->resolve_as_list(shell))
values.append(create<StringValue>(result));
}
values.append(element_value);
result = create<ListValue>(move(values));
}
}
if (!result)
return create<ListValue>({});
return result;
}
void ListConcatenate::for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback)
{
for (auto& entry : m_list) {
auto value = entry->run(shell);
if (!value)
continue;
if (callback(value.release_nonnull()) == IterationDecision::Break)
break;
}
}
void ListConcatenate::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
auto first = metadata.is_first_in_list;
metadata.is_first_in_list = false;
metadata.is_first_in_list = first;
for (auto& element : m_list) {
element->highlight_in_editor(editor, shell, metadata);
metadata.is_first_in_list = false;
}
}
HitTestResult ListConcatenate::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
bool first = true;
for (auto& element : m_list) {
auto result = element->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning && !first)
result.closest_node_with_semantic_meaning = this;
if (result.matching_node)
return result;
first = false;
}
return {};
}
RefPtr<Node> ListConcatenate::leftmost_trivial_literal() const
{
if (m_list.is_empty())
return nullptr;
return m_list.first()->leftmost_trivial_literal();
}
ListConcatenate::ListConcatenate(Position position, Vector<NonnullRefPtr<Node>> list)
: Node(move(position))
, m_list(move(list))
{
for (auto& element : m_list) {
if (element->is_syntax_error()) {
set_is_syntax_error(element->syntax_error_node());
break;
}
}
}
ListConcatenate::~ListConcatenate()
{
}
void Background::dump(int level) const
{
Node::dump(level);
m_command->dump(level + 1);
}
RefPtr<Value> Background::run(RefPtr<Shell> shell)
{
auto commands = m_command->to_lazy_evaluated_commands(shell);
for (auto& command : commands)
command.should_wait = false;
return create<CommandSequenceValue>(move(commands));
}
void Background::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_command->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Background::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
return m_command->hit_test_position(offset);
}
Background::Background(Position position, NonnullRefPtr<Node> command)
: Node(move(position))
, m_command(move(command))
{
if (m_command->is_syntax_error())
set_is_syntax_error(m_command->syntax_error_node());
}
Background::~Background()
{
}
void BarewordLiteral::dump(int level) const
{
Node::dump(level);
print_indented(m_text, level + 1);
}
RefPtr<Value> BarewordLiteral::run(RefPtr<Shell>)
{
return create<StringValue>(m_text);
}
void BarewordLiteral::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
if (metadata.is_first_in_list) {
if (shell.is_runnable(m_text)) {
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Bold });
} else {
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Red) });
}
return;
}
if (m_text.starts_with('-')) {
if (m_text == "--") {
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Green) });
return;
}
if (m_text == "-")
return;
if (m_text.starts_with("--")) {
auto index = m_text.index_of("=").value_or(m_text.length() - 1) + 1;
editor.stylize({ m_position.start_offset, m_position.start_offset + index }, { Line::Style::Foreground(Line::Style::XtermColor::Cyan) });
} else {
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Cyan) });
}
}
if (Core::File::exists(m_text)) {
auto realpath = shell.resolve_path(m_text);
auto url = URL::create_with_file_protocol(realpath);
url.set_host(shell.hostname);
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Hyperlink(url.to_string()) });
}
}
BarewordLiteral::BarewordLiteral(Position position, String text)
: Node(move(position))
, m_text(move(text))
{
}
BarewordLiteral::~BarewordLiteral()
{
}
void BraceExpansion::dump(int level) const
{
Node::dump(level);
for (auto& entry : m_entries)
entry.dump(level + 1);
}
RefPtr<Value> BraceExpansion::run(RefPtr<Shell> shell)
{
NonnullRefPtrVector<Value> values;
for (auto& entry : m_entries) {
auto value = entry.run(shell);
if (value)
values.append(value.release_nonnull());
}
return create<ListValue>(move(values));
}
HitTestResult BraceExpansion::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
for (auto& entry : m_entries) {
auto result = entry.hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = &entry;
return result;
}
}
return {};
}
void BraceExpansion::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
for (auto& entry : m_entries) {
entry.highlight_in_editor(editor, shell, metadata);
metadata.is_first_in_list = false;
}
}
BraceExpansion::BraceExpansion(Position position, NonnullRefPtrVector<Node> entries)
: Node(move(position))
, m_entries(move(entries))
{
for (auto& entry : m_entries) {
if (entry.is_syntax_error()) {
set_is_syntax_error(entry.syntax_error_node());
break;
}
}
}
BraceExpansion::~BraceExpansion()
{
}
void CastToCommand::dump(int level) const
{
Node::dump(level);
m_inner->dump(level + 1);
}
RefPtr<Value> CastToCommand::run(RefPtr<Shell> shell)
{
if (m_inner->is_command())
return m_inner->run(shell);
auto value = m_inner->run(shell)->resolve_without_cast(shell);
if (value->is_command())
return value;
auto argv = value->resolve_as_list(shell);
return create<CommandValue>(move(argv), position());
}
void CastToCommand::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_inner->highlight_in_editor(editor, shell, metadata);
}
HitTestResult CastToCommand::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_inner->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning)
result.closest_node_with_semantic_meaning = this;
return result;
}
Vector<Line::CompletionSuggestion> CastToCommand::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node || !matching_node->is_bareword())
return {};
auto corrected_offset = offset - matching_node->position().start_offset;
auto* node = static_cast<BarewordLiteral*>(matching_node.ptr());
if (corrected_offset > node->text().length())
return {};
return shell.complete_program_name(node->text(), corrected_offset);
}
RefPtr<Node> CastToCommand::leftmost_trivial_literal() const
{
return m_inner->leftmost_trivial_literal();
}
CastToCommand::CastToCommand(Position position, NonnullRefPtr<Node> inner)
: Node(move(position))
, m_inner(move(inner))
{
if (m_inner->is_syntax_error())
set_is_syntax_error(m_inner->syntax_error_node());
}
CastToCommand::~CastToCommand()
{
}
void CastToList::dump(int level) const
{
Node::dump(level);
if (m_inner)
m_inner->dump(level + 1);
else
print_indented("(empty)", level + 1);
}
RefPtr<Value> CastToList::run(RefPtr<Shell> shell)
{
if (!m_inner)
return create<ListValue>({});
auto inner_value = m_inner->run(shell)->resolve_without_cast(shell);
if (inner_value->is_command() || inner_value->is_list())
return inner_value;
auto values = inner_value->resolve_as_list(shell);
NonnullRefPtrVector<Value> cast_values;
for (auto& value : values)
cast_values.append(create<StringValue>(value));
return create<ListValue>(cast_values);
}
void CastToList::for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback)
{
if (m_inner)
m_inner->for_each_entry(shell, move(callback));
}
void CastToList::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
if (m_inner)
m_inner->highlight_in_editor(editor, shell, metadata);
}
HitTestResult CastToList::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (!m_inner)
return {};
return m_inner->hit_test_position(offset);
}
RefPtr<Node> CastToList::leftmost_trivial_literal() const
{
return m_inner->leftmost_trivial_literal();
}
CastToList::CastToList(Position position, RefPtr<Node> inner)
: Node(move(position))
, m_inner(move(inner))
{
if (m_inner && m_inner->is_syntax_error())
set_is_syntax_error(m_inner->syntax_error_node());
}
CastToList::~CastToList()
{
}
void CloseFdRedirection::dump(int level) const
{
Node::dump(level);
print_indented(String::format("%d -> Close", m_fd), level);
}
RefPtr<Value> CloseFdRedirection::run(RefPtr<Shell>)
{
Command command;
command.position = position();
command.redirections.append(adopt(*new CloseRedirection(m_fd)));
return create<CommandValue>(move(command));
}
void CloseFdRedirection::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset - 1 }, { Line::Style::Foreground(0x87, 0x9b, 0xcd) }); // 25% Darkened Periwinkle
editor.stylize({ m_position.end_offset - 1, m_position.end_offset }, { Line::Style::Foreground(0xff, 0x7e, 0x00) }); // Amber
}
CloseFdRedirection::CloseFdRedirection(Position position, int fd)
: Node(move(position))
, m_fd(fd)
{
}
CloseFdRedirection::~CloseFdRedirection()
{
}
void CommandLiteral::dump(int level) const
{
Node::dump(level);
print_indented("(Generated command literal)", level + 1);
}
RefPtr<Value> CommandLiteral::run(RefPtr<Shell>)
{
return create<CommandValue>(m_command);
}
CommandLiteral::CommandLiteral(Position position, Command command)
: Node(move(position))
, m_command(move(command))
{
}
CommandLiteral::~CommandLiteral()
{
}
void Comment::dump(int level) const
{
Node::dump(level);
print_indented(m_text, level + 1);
}
RefPtr<Value> Comment::run(RefPtr<Shell>)
{
return create<ListValue>({});
}
void Comment::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(150, 150, 150) }); // Light gray
}
Comment::Comment(Position position, String text)
: Node(move(position))
, m_text(move(text))
{
}
Comment::~Comment()
{
}
void ContinuationControl::dump(int level) const
{
Node::dump(level);
print_indented(m_kind == Continue ? "(Continue)" : "(Break)", level + 1);
}
RefPtr<Value> ContinuationControl::run(RefPtr<Shell> shell)
{
if (m_kind == Break)
shell->raise_error(Shell::ShellError::InternalControlFlowBreak, {}, position());
else if (m_kind == Continue)
shell->raise_error(Shell::ShellError::InternalControlFlowContinue, {}, position());
else
VERIFY_NOT_REACHED();
return create<ListValue>({});
}
void ContinuationControl::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
}
void DoubleQuotedString::dump(int level) const
{
Node::dump(level);
m_inner->dump(level + 1);
}
RefPtr<Value> DoubleQuotedString::run(RefPtr<Shell> shell)
{
StringBuilder builder;
auto values = m_inner->run(shell)->resolve_as_list(shell);
builder.join("", values);
return create<StringValue>(builder.to_string());
}
void DoubleQuotedString::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
Line::Style style { Line::Style::Foreground(Line::Style::XtermColor::Yellow) };
if (metadata.is_first_in_list)
style.unify_with({ Line::Style::Bold });
editor.stylize({ m_position.start_offset, m_position.end_offset }, style);
metadata.is_first_in_list = false;
m_inner->highlight_in_editor(editor, shell, metadata);
}
HitTestResult DoubleQuotedString::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
return m_inner->hit_test_position(offset);
}
DoubleQuotedString::DoubleQuotedString(Position position, RefPtr<Node> inner)
: Node(move(position))
, m_inner(move(inner))
{
if (m_inner->is_syntax_error())
set_is_syntax_error(m_inner->syntax_error_node());
}
DoubleQuotedString::~DoubleQuotedString()
{
}
void DynamicEvaluate::dump(int level) const
{
Node::dump(level);
m_inner->dump(level + 1);
}
RefPtr<Value> DynamicEvaluate::run(RefPtr<Shell> shell)
{
auto result = m_inner->run(shell)->resolve_without_cast(shell);
// Dynamic Evaluation behaves differently between strings and lists.
// Strings are treated as variables, and Lists are treated as commands.
if (result->is_string()) {
auto name_part = result->resolve_as_list(shell);
VERIFY(name_part.size() == 1);
return create<SimpleVariableValue>(name_part[0]);
}
// If it's anything else, we're just gonna cast it to a list.
auto list = result->resolve_as_list(shell);
return create<CommandValue>(move(list), position());
}
void DynamicEvaluate::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
m_inner->highlight_in_editor(editor, shell, metadata);
}
HitTestResult DynamicEvaluate::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
return m_inner->hit_test_position(offset);
}
DynamicEvaluate::DynamicEvaluate(Position position, NonnullRefPtr<Node> inner)
: Node(move(position))
, m_inner(move(inner))
{
if (m_inner->is_syntax_error())
set_is_syntax_error(m_inner->syntax_error_node());
}
DynamicEvaluate::~DynamicEvaluate()
{
}
void Fd2FdRedirection::dump(int level) const
{
Node::dump(level);
print_indented(String::format("%d -> %d", m_old_fd, m_new_fd), level);
}
RefPtr<Value> Fd2FdRedirection::run(RefPtr<Shell>)
{
Command command;
command.position = position();
command.redirections.append(FdRedirection::create(m_new_fd, m_old_fd, Rewiring::Close::None));
return create<CommandValue>(move(command));
}
void Fd2FdRedirection::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(0x87, 0x9b, 0xcd) }); // 25% Darkened Periwinkle
}
Fd2FdRedirection::Fd2FdRedirection(Position position, int src, int dst)
: Node(move(position))
, m_old_fd(src)
, m_new_fd(dst)
{
}
Fd2FdRedirection::~Fd2FdRedirection()
{
}
void FunctionDeclaration::dump(int level) const
{
Node::dump(level);
print_indented(String::format("(name: %s)\n", m_name.name.characters()), level + 1);
print_indented("(argument namess)", level + 1);
for (auto& arg : m_arguments)
print_indented(String::format("(name: %s)\n", arg.name.characters()), level + 2);
print_indented("(body)", level + 1);
if (m_block)
m_block->dump(level + 2);
else
print_indented("(null)", level + 2);
}
RefPtr<Value> FunctionDeclaration::run(RefPtr<Shell> shell)
{
Vector<String> args;
for (auto& arg : m_arguments)
args.append(arg.name);
shell->define_function(m_name.name, move(args), m_block);
return create<ListValue>({});
}
void FunctionDeclaration::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
editor.stylize({ m_name.position.start_offset, m_name.position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Blue) });
for (auto& arg : m_arguments)
editor.stylize({ arg.position.start_offset, arg.position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Blue), Line::Style::Italic });
metadata.is_first_in_list = true;
if (m_block)
m_block->highlight_in_editor(editor, shell, metadata);
}
HitTestResult FunctionDeclaration::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (!m_block)
return {};
auto result = m_block->hit_test_position(offset);
if (result.matching_node && result.matching_node->is_simple_variable())
result.closest_node_with_semantic_meaning = this;
return result;
}
Vector<Line::CompletionSuggestion> FunctionDeclaration::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node)
return {};
if (!matching_node->is_simple_variable())
return matching_node->complete_for_editor(shell, offset, hit_test_result);
auto corrected_offset = offset - matching_node->position().start_offset - 1; // Skip the first '$'
auto* node = static_cast<SimpleVariable*>(matching_node.ptr());
auto name = node->name().substring_view(0, corrected_offset);
Vector<Line::CompletionSuggestion> results;
for (auto& arg : m_arguments) {
if (arg.name.starts_with(name))
results.append(arg.name);
}
results.append(matching_node->complete_for_editor(shell, offset, hit_test_result));
return results;
}
FunctionDeclaration::FunctionDeclaration(Position position, NameWithPosition name, Vector<NameWithPosition> arguments, RefPtr<AST::Node> body)
: Node(move(position))
, m_name(move(name))
, m_arguments(arguments)
, m_block(move(body))
{
if (m_block && m_block->is_syntax_error())
set_is_syntax_error(m_block->syntax_error_node());
}
FunctionDeclaration::~FunctionDeclaration()
{
}
void ForLoop::dump(int level) const
{
Node::dump(level);
if (m_variable.has_value())
print_indented(String::formatted("iterating with {} in", m_variable->name), level + 1);
if (m_index_variable.has_value())
print_indented(String::formatted("with index name {} in", m_index_variable->name), level + 1);
if (m_iterated_expression)
m_iterated_expression->dump(level + 2);
else
print_indented("(ever)", level + 2);
print_indented("Running", level + 1);
if (m_block)
m_block->dump(level + 2);
else
print_indented("(null)", level + 2);
}
RefPtr<Value> ForLoop::run(RefPtr<Shell> shell)
{
if (!m_block)
return create<ListValue>({});
size_t consecutive_interruptions = 0;
auto run = [&](auto& block_value) {
if (shell->has_error(Shell::ShellError::InternalControlFlowBreak)) {
shell->take_error();
return IterationDecision::Break;
}
if (shell->has_error(Shell::ShellError::InternalControlFlowContinue)) {
shell->take_error();
return IterationDecision::Continue;
}
if (!shell->has_error(Shell::ShellError::None))
return IterationDecision::Break;
if (block_value->is_job()) {
auto job = static_cast<JobValue*>(block_value.ptr())->job();
if (!job || job->is_running_in_background())
return IterationDecision::Continue;
shell->block_on_job(job);
if (job->signaled()) {
if (job->termination_signal() == SIGINT)
++consecutive_interruptions;
else
return IterationDecision::Break;
} else {
consecutive_interruptions = 0;
}
}
return IterationDecision::Continue;
};
if (m_iterated_expression) {
auto variable_name = m_variable.has_value() ? m_variable->name : "it";
Optional<StringView> index_name = m_index_variable.has_value() ? Optional<StringView>(m_index_variable->name) : Optional<StringView>();
size_t i = 0;
m_iterated_expression->for_each_entry(shell, [&](auto value) {
if (consecutive_interruptions == 2)
return IterationDecision::Break;
RefPtr<Value> block_value;
{
auto frame = shell->push_frame(String::formatted("for ({})", this));
shell->set_local_variable(variable_name, value, true);
if (index_name.has_value())
shell->set_local_variable(index_name.value(), create<AST::StringValue>(String::number(i)), true);
++i;
block_value = m_block->run(shell);
}
return run(block_value);
});
} else {
for (;;) {
if (consecutive_interruptions == 2)
break;
RefPtr<Value> block_value = m_block->run(shell);
if (run(block_value) == IterationDecision::Break)
break;
}
}
return create<ListValue>({});
}
void ForLoop::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
auto is_loop = m_iterated_expression.is_null();
editor.stylize({ m_position.start_offset, m_position.start_offset + (is_loop ? 4 : 3) }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
if (!is_loop) {
if (m_in_kw_position.has_value())
editor.stylize({ m_in_kw_position.value().start_offset, m_in_kw_position.value().end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
if (m_index_kw_position.has_value())
editor.stylize({ m_index_kw_position.value().start_offset, m_index_kw_position.value().end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
metadata.is_first_in_list = false;
m_iterated_expression->highlight_in_editor(editor, shell, metadata);
}
if (m_index_variable.has_value())
editor.stylize({ m_index_variable->position.start_offset, m_index_variable->position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Blue), Line::Style::Italic });
if (m_variable.has_value())
editor.stylize({ m_variable->position.start_offset, m_variable->position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Blue), Line::Style::Italic });
metadata.is_first_in_list = true;
if (m_block)
m_block->highlight_in_editor(editor, shell, metadata);
}
HitTestResult ForLoop::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (m_iterated_expression) {
if (auto result = m_iterated_expression->hit_test_position(offset); result.matching_node)
return result;
}
if (!m_block)
return {};
return m_block->hit_test_position(offset);
}
ForLoop::ForLoop(Position position, Optional<NameWithPosition> variable, Optional<NameWithPosition> index_variable, RefPtr<AST::Node> iterated_expr, RefPtr<AST::Node> block, Optional<Position> in_kw_position, Optional<Position> index_kw_position)
: Node(move(position))
, m_variable(move(variable))
, m_index_variable(move(index_variable))
, m_iterated_expression(move(iterated_expr))
, m_block(move(block))
, m_in_kw_position(move(in_kw_position))
, m_index_kw_position(move(index_kw_position))
{
if (m_iterated_expression && m_iterated_expression->is_syntax_error())
set_is_syntax_error(m_iterated_expression->syntax_error_node());
else if (m_block && m_block->is_syntax_error())
set_is_syntax_error(m_block->syntax_error_node());
}
ForLoop::~ForLoop()
{
}
void Glob::dump(int level) const
{
Node::dump(level);
print_indented(m_text, level + 1);
}
RefPtr<Value> Glob::run(RefPtr<Shell>)
{
return create<GlobValue>(m_text, position());
}
void Glob::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata metadata)
{
Line::Style style { Line::Style::Foreground(Line::Style::XtermColor::Cyan) };
if (metadata.is_first_in_list)
style.unify_with({ Line::Style::Bold });
editor.stylize({ m_position.start_offset, m_position.end_offset }, move(style));
}
Glob::Glob(Position position, String text)
: Node(move(position))
, m_text(move(text))
{
}
Glob::~Glob()
{
}
void HistoryEvent::dump(int level) const
{
Node::dump(level);
print_indented("Event Selector", level + 1);
switch (m_selector.event.kind) {
case HistorySelector::EventKind::IndexFromStart:
print_indented("IndexFromStart", level + 2);
break;
case HistorySelector::EventKind::IndexFromEnd:
print_indented("IndexFromEnd", level + 2);
break;
case HistorySelector::EventKind::ContainingStringLookup:
print_indented("ContainingStringLookup", level + 2);
break;
case HistorySelector::EventKind::StartingStringLookup:
print_indented("StartingStringLookup", level + 2);
break;
}
print_indented(String::formatted("{}({})", m_selector.event.index, m_selector.event.text), level + 3);
print_indented("Word Selector", level + 1);
auto print_word_selector = [&](const HistorySelector::WordSelector& selector) {
switch (selector.kind) {
case HistorySelector::WordSelectorKind::Index:
print_indented(String::formatted("Index {}", selector.selector), level + 3);
break;
case HistorySelector::WordSelectorKind::Last:
print_indented(String::formatted("Last"), level + 3);
break;
}
};
if (m_selector.word_selector_range.end.has_value()) {
print_indented("Range Start", level + 2);
print_word_selector(m_selector.word_selector_range.start);
print_indented("Range End", level + 2);
print_word_selector(m_selector.word_selector_range.end.value());
} else {
print_indented("Direct Address", level + 2);
print_word_selector(m_selector.word_selector_range.start);
}
}
RefPtr<Value> HistoryEvent::run(RefPtr<Shell> shell)
{
if (!shell)
return create<AST::ListValue>({});
auto editor = shell->editor();
if (!editor) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "No history available!", position());
return create<AST::ListValue>({});
}
auto& history = editor->history();
// FIXME: Implement reverse iterators and find()?
auto find_reverse = [](auto it_start, auto it_end, auto finder) {
auto it = it_end;
while (it != it_start) {
--it;
if (finder(*it))
return it;
}
return it_end;
};
// First, resolve the event itself.
String resolved_history;
switch (m_selector.event.kind) {
case HistorySelector::EventKind::IndexFromStart:
if (m_selector.event.index >= history.size()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History event index out of bounds", m_selector.event.text_position);
return create<AST::ListValue>({});
}
resolved_history = history[m_selector.event.index].entry;
break;
case HistorySelector::EventKind::IndexFromEnd:
if (m_selector.event.index >= history.size()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History event index out of bounds", m_selector.event.text_position);
return create<AST::ListValue>({});
}
resolved_history = history[history.size() - m_selector.event.index - 1].entry;
break;
case HistorySelector::EventKind::ContainingStringLookup: {
auto it = find_reverse(history.begin(), history.end(), [&](auto& entry) { return entry.entry.contains(m_selector.event.text); });
if (it.is_end()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History event did not match any entry", m_selector.event.text_position);
return create<AST::ListValue>({});
}
resolved_history = it->entry;
break;
}
case HistorySelector::EventKind::StartingStringLookup: {
auto it = find_reverse(history.begin(), history.end(), [&](auto& entry) { return entry.entry.starts_with(m_selector.event.text); });
if (it.is_end()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History event did not match any entry", m_selector.event.text_position);
return create<AST::ListValue>({});
}
resolved_history = it->entry;
break;
}
}
// Then, split it up to "words".
auto nodes = Parser { resolved_history }.parse_as_multiple_expressions();
// Now take the "words" as described by the word selectors.
bool is_range = m_selector.word_selector_range.end.has_value();
if (is_range) {
auto start_index = m_selector.word_selector_range.start.resolve(nodes.size());
auto end_index = m_selector.word_selector_range.end->resolve(nodes.size());
if (start_index >= nodes.size()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History word index out of bounds", m_selector.word_selector_range.start.position);
return create<AST::ListValue>({});
}
if (end_index >= nodes.size()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History word index out of bounds", m_selector.word_selector_range.end->position);
return create<AST::ListValue>({});
}
decltype(nodes) resolved_nodes;
resolved_nodes.append(nodes.data() + start_index, end_index - start_index + 1);
NonnullRefPtr<AST::Node> list = create<AST::ListConcatenate>(position(), move(resolved_nodes));
return list->run(shell);
}
auto index = m_selector.word_selector_range.start.resolve(nodes.size());
if (index >= nodes.size()) {
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "History word index out of bounds", m_selector.word_selector_range.start.position);
return create<AST::ListValue>({});
}
return nodes[index].run(shell);
}
void HistoryEvent::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata metadata)
{
Line::Style style { Line::Style::Foreground(Line::Style::XtermColor::Green) };
if (metadata.is_first_in_list)
style.unify_with({ Line::Style::Bold });
editor.stylize({ m_position.start_offset, m_position.end_offset }, move(style));
}
HistoryEvent::HistoryEvent(Position position, HistorySelector selector)
: Node(move(position))
, m_selector(move(selector))
{
if (m_selector.word_selector_range.start.syntax_error_node)
set_is_syntax_error(*m_selector.word_selector_range.start.syntax_error_node);
else if (m_selector.word_selector_range.end.has_value() && m_selector.word_selector_range.end->syntax_error_node)
set_is_syntax_error(*m_selector.word_selector_range.end->syntax_error_node);
}
HistoryEvent::~HistoryEvent()
{
}
void Execute::dump(int level) const
{
Node::dump(level);
if (m_capture_stdout)
print_indented("(Capturing stdout)", level + 1);
m_command->dump(level + 1);
}
void Execute::for_each_entry(RefPtr<Shell> shell, Function<IterationDecision(NonnullRefPtr<Value>)> callback)
{
if (m_command->would_execute())
return m_command->for_each_entry(shell, move(callback));
auto commands = shell->expand_aliases(m_command->run(shell)->resolve_as_commands(shell));
if (m_capture_stdout) {
int pipefd[2];
int rc = pipe(pipefd);
if (rc < 0) {
dbgln("Error: cannot pipe(): {}", strerror(errno));
return;
}
auto& last_in_commands = commands.last();
last_in_commands.redirections.prepend(FdRedirection::create(pipefd[1], STDOUT_FILENO, Rewiring::Close::Old));
last_in_commands.should_wait = false;
last_in_commands.should_notify_if_in_background = false;
last_in_commands.is_pipe_source = false;
Core::EventLoop loop;
auto notifier = Core::Notifier::construct(pipefd[0], Core::Notifier::Read);
DuplexMemoryStream stream;
enum {
Continue,
Break,
NothingLeft,
};
auto check_and_call = [&] {
auto ifs = shell->local_variable_or("IFS", "\n");
if (auto offset = stream.offset_of(ifs.bytes()); offset.has_value()) {
auto line_end = offset.value();
if (line_end == 0) {
auto rc = stream.discard_or_error(ifs.length());
VERIFY(rc);
if (shell->options.inline_exec_keep_empty_segments)
if (callback(create<StringValue>("")) == IterationDecision::Break) {
loop.quit(Break);
notifier->set_enabled(false);
return Break;
}
} else {
auto entry = ByteBuffer::create_uninitialized(line_end + ifs.length());
auto rc = stream.read_or_error(entry);
VERIFY(rc);
auto str = StringView(entry.data(), entry.size() - ifs.length());
if (callback(create<StringValue>(str)) == IterationDecision::Break) {
loop.quit(Break);
notifier->set_enabled(false);
return Break;
}
}
return Continue;
}
return NothingLeft;
};
notifier->on_ready_to_read = [&] {
constexpr static auto buffer_size = 16;
u8 buffer[buffer_size];
size_t remaining_size = buffer_size;
for (;;) {
notifier->set_event_mask(Core::Notifier::None);
bool should_enable_notifier = false;
ScopeGuard notifier_enabler { [&] {
if (should_enable_notifier)
notifier->set_event_mask(Core::Notifier::Read);
} };
if (check_and_call() == Break) {
loop.quit(Break);
return;
}
auto read_size = read(pipefd[0], buffer, remaining_size);
if (read_size < 0) {
int saved_errno = errno;
if (saved_errno == EINTR) {
should_enable_notifier = true;
continue;
}
if (saved_errno == 0)
continue;
dbgln("read() failed: {}", strerror(saved_errno));
break;
}
if (read_size == 0)
break;
should_enable_notifier = true;
stream.write({ buffer, (size_t)read_size });
}
loop.quit(NothingLeft);
};
auto jobs = shell->run_commands(commands);
ScopeGuard kill_jobs_if_around { [&] {
for (auto& job : jobs) {
if (job.is_running_in_background() && !job.exited() && !job.signaled()) {
job.set_should_announce_signal(false); // We're explicitly killing it here.
shell->kill_job(&job, SIGTERM);
}
}
} };
auto exit_reason = loop.exec();
notifier->on_ready_to_read = nullptr;
if (close(pipefd[0]) < 0) {
dbgln("close() failed: {}", strerror(errno));
}
if (exit_reason != Break && !stream.eof()) {
auto action = Continue;
do {
action = check_and_call();
if (action == Break)
return;
} while (action == Continue);
if (!stream.eof()) {
auto entry = ByteBuffer::create_uninitialized(stream.size());
auto rc = stream.read_or_error(entry);
VERIFY(rc);
callback(create<StringValue>(String::copy(entry)));
}
}
return;
}
auto jobs = shell->run_commands(commands);
if (!jobs.is_empty())
callback(create<JobValue>(&jobs.last()));
}
RefPtr<Value> Execute::run(RefPtr<Shell> shell)
{
if (m_command->would_execute())
return m_command->run(shell);
NonnullRefPtrVector<Value> values;
for_each_entry(shell, [&](auto value) {
values.append(*value);
return IterationDecision::Continue;
});
if (values.size() == 1 && values.first().is_job())
return values.first();
return create<ListValue>(move(values));
}
void Execute::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
if (m_capture_stdout)
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Green) });
metadata.is_first_in_list = true;
m_command->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Execute::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_command->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning)
result.closest_node_with_semantic_meaning = this;
if (!result.closest_command_node)
result.closest_command_node = m_command;
return result;
}
Vector<Line::CompletionSuggestion> Execute::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node || !matching_node->is_bareword())
return {};
auto corrected_offset = offset - matching_node->position().start_offset;
auto* node = static_cast<BarewordLiteral*>(matching_node.ptr());
if (corrected_offset > node->text().length())
return {};
return shell.complete_program_name(node->text(), corrected_offset);
}
Execute::Execute(Position position, NonnullRefPtr<Node> command, bool capture_stdout)
: Node(move(position))
, m_command(move(command))
, m_capture_stdout(capture_stdout)
{
if (m_command->is_syntax_error())
set_is_syntax_error(m_command->syntax_error_node());
}
Execute::~Execute()
{
}
void IfCond::dump(int level) const
{
Node::dump(level);
print_indented("Condition", ++level);
m_condition->dump(level + 1);
print_indented("True Branch", level);
if (m_true_branch)
m_true_branch->dump(level + 1);
else
print_indented("(empty)", level + 1);
print_indented("False Branch", level);
if (m_false_branch)
m_false_branch->dump(level + 1);
else
print_indented("(empty)", level + 1);
}
RefPtr<Value> IfCond::run(RefPtr<Shell> shell)
{
auto cond = m_condition->run(shell)->resolve_without_cast(shell);
// The condition could be a builtin, in which case it has already run and exited.
if (cond && cond->is_job()) {
auto cond_job_value = static_cast<const JobValue*>(cond.ptr());
auto cond_job = cond_job_value->job();
shell->block_on_job(cond_job);
}
if (shell->last_return_code == 0) {
if (m_true_branch)
return m_true_branch->run(shell);
} else {
if (m_false_branch)
return m_false_branch->run(shell);
}
return create<ListValue>({});
}
void IfCond::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
metadata.is_first_in_list = true;
editor.stylize({ m_position.start_offset, m_position.start_offset + 2 }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
if (m_else_position.has_value())
editor.stylize({ m_else_position.value().start_offset, m_else_position.value().start_offset + 4 }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
m_condition->highlight_in_editor(editor, shell, metadata);
if (m_true_branch)
m_true_branch->highlight_in_editor(editor, shell, metadata);
if (m_false_branch)
m_false_branch->highlight_in_editor(editor, shell, metadata);
}
HitTestResult IfCond::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (auto result = m_condition->hit_test_position(offset); result.matching_node)
return result;
if (m_true_branch) {
if (auto result = m_true_branch->hit_test_position(offset); result.matching_node)
return result;
}
if (m_false_branch) {
if (auto result = m_false_branch->hit_test_position(offset); result.matching_node)
return result;
}
return {};
}
IfCond::IfCond(Position position, Optional<Position> else_position, NonnullRefPtr<Node> condition, RefPtr<Node> true_branch, RefPtr<Node> false_branch)
: Node(move(position))
, m_condition(move(condition))
, m_true_branch(move(true_branch))
, m_false_branch(move(false_branch))
, m_else_position(move(else_position))
{
if (m_condition->is_syntax_error())
set_is_syntax_error(m_condition->syntax_error_node());
else if (m_true_branch && m_true_branch->is_syntax_error())
set_is_syntax_error(m_true_branch->syntax_error_node());
else if (m_false_branch && m_false_branch->is_syntax_error())
set_is_syntax_error(m_false_branch->syntax_error_node());
m_condition = create<AST::Execute>(m_condition->position(), m_condition);
if (m_true_branch) {
auto true_branch = m_true_branch.release_nonnull();
if (true_branch->is_execute())
m_true_branch = static_ptr_cast<AST::Execute>(true_branch)->command();
else
m_true_branch = move(true_branch);
}
if (m_false_branch) {
auto false_branch = m_false_branch.release_nonnull();
if (false_branch->is_execute())
m_false_branch = static_ptr_cast<AST::Execute>(false_branch)->command();
else
m_false_branch = move(false_branch);
}
}
IfCond::~IfCond()
{
}
void ImmediateExpression::dump(int level) const
{
Node::dump(level);
print_indented("(function)", level + 1);
print_indented(m_function.name, level + 2);
print_indented("(arguments)", level + 1);
for (auto& argument : arguments())
argument.dump(level + 2);
}
RefPtr<Value> ImmediateExpression::run(RefPtr<Shell> shell)
{
auto node = shell->run_immediate_function(m_function.name, *this, arguments());
if (node)
return node->run(shell);
return create<ListValue>({});
}
void ImmediateExpression::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
// '${' - FIXME: This could also be '$\\\n{'
editor.stylize({ m_position.start_offset, m_position.start_offset + 2 }, { Line::Style::Foreground(Line::Style::XtermColor::Green) });
// Function name
Line::Style function_style { Line::Style::Foreground(Line::Style::XtermColor::Red) };
if (shell.has_immediate_function(function_name()))
function_style = { Line::Style::Foreground(Line::Style::XtermColor::Green) };
editor.stylize({ m_function.position.start_offset, m_function.position.end_offset }, move(function_style));
// Arguments
for (auto& argument : m_arguments) {
metadata.is_first_in_list = false;
argument.highlight_in_editor(editor, shell, metadata);
}
// Closing brace
if (m_closing_brace_position.has_value())
editor.stylize({ m_closing_brace_position->start_offset, m_closing_brace_position->end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Green) });
}
Vector<Line::CompletionSuggestion> ImmediateExpression::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node || matching_node != this)
return {};
auto corrected_offset = offset - m_function.position.start_offset;
if (corrected_offset > m_function.name.length())
return {};
return shell.complete_immediate_function_name(m_function.name, corrected_offset);
}
HitTestResult ImmediateExpression::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (m_function.position.contains(offset))
return { this, this, this };
for (auto& argument : m_arguments) {
if (auto result = argument.hit_test_position(offset); result.matching_node)
return result;
}
return {};
}
ImmediateExpression::ImmediateExpression(Position position, NameWithPosition function, NonnullRefPtrVector<AST::Node> arguments, Optional<Position> closing_brace_position)
: Node(move(position))
, m_arguments(move(arguments))
, m_function(move(function))
, m_closing_brace_position(move(closing_brace_position))
{
if (m_is_syntax_error)
return;
for (auto& argument : m_arguments) {
if (argument.is_syntax_error()) {
set_is_syntax_error(argument.syntax_error_node());
return;
}
}
}
ImmediateExpression::~ImmediateExpression()
{
}
void Join::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> Join::run(RefPtr<Shell> shell)
{
auto left = m_left->to_lazy_evaluated_commands(shell);
auto right = m_right->to_lazy_evaluated_commands(shell);
return create<CommandSequenceValue>(join_commands(move(left), move(right)));
}
void Join::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_left->highlight_in_editor(editor, shell, metadata);
if (m_left->is_list() || m_left->is_command())
metadata.is_first_in_list = false;
m_right->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Join::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (result.matching_node)
return result;
return m_right->hit_test_position(offset);
}
RefPtr<Node> Join::leftmost_trivial_literal() const
{
if (auto value = m_left->leftmost_trivial_literal())
return value;
return m_right->leftmost_trivial_literal();
}
Join::Join(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
Join::~Join()
{
}
void MatchExpr::dump(int level) const
{
Node::dump(level);
print_indented(String::formatted("(expression: {})", m_expr_name.characters()), level + 1);
m_matched_expr->dump(level + 2);
print_indented(String::formatted("(named: {})", m_expr_name.characters()), level + 1);
print_indented("(entries)", level + 1);
for (auto& entry : m_entries) {
StringBuilder builder;
builder.append("(match");
if (entry.match_names.has_value()) {
builder.append(" to names (");
bool first = true;
for (auto& name : entry.match_names.value()) {
if (!first)
builder.append(' ');
first = false;
builder.append(name);
}
builder.append("))");
} else {
builder.append(')');
}
print_indented(builder.string_view(), level + 2);
for (auto& node : entry.options)
node.dump(level + 3);
print_indented("(execute)", level + 2);
if (entry.body)
entry.body->dump(level + 3);
else
print_indented("(nothing)", level + 3);
}
}
RefPtr<Value> MatchExpr::run(RefPtr<Shell> shell)
{
auto value = m_matched_expr->run(shell)->resolve_without_cast(shell);
auto list = value->resolve_as_list(shell);
auto list_matches = [&](auto&& pattern, auto& spans) {
if (pattern.size() != list.size())
return false;
for (size_t i = 0; i < pattern.size(); ++i) {
Vector<AK::MaskSpan> mask_spans;
if (!list[i].matches(pattern[i], mask_spans))
return false;
for (auto& span : mask_spans)
spans.append(list[i].substring(span.start, span.length));
}
return true;
};
auto resolve_pattern = [&](auto& option) {
Vector<String> pattern;
if (option.is_glob()) {
pattern.append(static_cast<const Glob*>(&option)->text());
} else if (option.is_bareword()) {
pattern.append(static_cast<const BarewordLiteral*>(&option)->text());
} else {
auto list = option.run(shell);
option.for_each_entry(shell, [&](auto&& value) {
pattern.append(value->resolve_as_list(nullptr)); // Note: 'nullptr' incurs special behaviour,
// asking the node for a 'raw' value.
return IterationDecision::Continue;
});
}
return pattern;
};
auto frame = shell->push_frame(String::formatted("match ({})", this));
if (!m_expr_name.is_empty())
shell->set_local_variable(m_expr_name, value, true);
for (auto& entry : m_entries) {
for (auto& option : entry.options) {
Vector<String> spans;
if (list_matches(resolve_pattern(option), spans)) {
if (entry.body) {
if (entry.match_names.has_value()) {
size_t i = 0;
for (auto& name : entry.match_names.value()) {
if (spans.size() > i)
shell->set_local_variable(name, create<AST::StringValue>(spans[i]), true);
++i;
}
}
return entry.body->run(shell);
} else {
return create<AST::ListValue>({});
}
}
}
}
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "Non-exhaustive match rules!", position());
return create<AST::ListValue>({});
}
void MatchExpr::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
editor.stylize({ m_position.start_offset, m_position.start_offset + 5 }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
if (m_as_position.has_value())
editor.stylize({ m_as_position.value().start_offset, m_as_position.value().end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
metadata.is_first_in_list = false;
m_matched_expr->highlight_in_editor(editor, shell, metadata);
for (auto& entry : m_entries) {
metadata.is_first_in_list = false;
for (auto& option : entry.options)
option.highlight_in_editor(editor, shell, metadata);
metadata.is_first_in_list = true;
if (entry.body)
entry.body->highlight_in_editor(editor, shell, metadata);
for (auto& position : entry.pipe_positions)
editor.stylize({ position.start_offset, position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
if (entry.match_as_position.has_value())
editor.stylize({ entry.match_as_position.value().start_offset, entry.match_as_position.value().end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
}
}
HitTestResult MatchExpr::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_matched_expr->hit_test_position(offset);
if (result.matching_node)
return result;
for (auto& entry : m_entries) {
if (!entry.body)
continue;
auto result = entry.body->hit_test_position(offset);
if (result.matching_node)
return result;
}
return {};
}
MatchExpr::MatchExpr(Position position, NonnullRefPtr<Node> expr, String name, Optional<Position> as_position, Vector<MatchEntry> entries)
: Node(move(position))
, m_matched_expr(move(expr))
, m_expr_name(move(name))
, m_as_position(move(as_position))
, m_entries(move(entries))
{
if (m_matched_expr->is_syntax_error()) {
set_is_syntax_error(m_matched_expr->syntax_error_node());
} else {
for (auto& entry : m_entries) {
if (!entry.body)
continue;
if (entry.body->is_syntax_error()) {
set_is_syntax_error(entry.body->syntax_error_node());
break;
}
}
}
}
MatchExpr::~MatchExpr()
{
}
void Or::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> Or::run(RefPtr<Shell> shell)
{
auto commands = m_left->to_lazy_evaluated_commands(shell);
commands.last().next_chain.empend(*m_right, NodeWithAction::Or);
return create<CommandSequenceValue>(move(commands));
}
void Or::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_left->highlight_in_editor(editor, shell, metadata);
m_right->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Or::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
result = m_right->hit_test_position(offset);
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
Or::Or(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right, Position or_position)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
, m_or_position(or_position)
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
Or::~Or()
{
}
void Pipe::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> Pipe::run(RefPtr<Shell> shell)
{
auto left = m_left->to_lazy_evaluated_commands(shell);
auto right = m_right->to_lazy_evaluated_commands(shell);
auto last_in_left = left.take_last();
auto first_in_right = right.take_first();
auto pipe_read_end = FdRedirection::create(-1, STDIN_FILENO, Rewiring::Close::Old);
auto pipe_write_end = FdRedirection::create(-1, STDOUT_FILENO, pipe_read_end, Rewiring::Close::RefreshOld);
first_in_right.redirections.append(pipe_read_end);
last_in_left.redirections.append(pipe_write_end);
last_in_left.should_wait = false;
last_in_left.is_pipe_source = true;
if (first_in_right.pipeline) {
last_in_left.pipeline = first_in_right.pipeline;
} else {
auto pipeline = create<Pipeline>();
last_in_left.pipeline = pipeline;
first_in_right.pipeline = pipeline;
}
Vector<Command> commands;
commands.append(left);
commands.append(last_in_left);
commands.append(first_in_right);
commands.append(right);
return create<CommandSequenceValue>(move(commands));
}
void Pipe::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_left->highlight_in_editor(editor, shell, metadata);
m_right->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Pipe::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
result = m_right->hit_test_position(offset);
if (!result.closest_command_node)
result.closest_command_node = m_right;
return result;
}
Pipe::Pipe(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
Pipe::~Pipe()
{
}
PathRedirectionNode::PathRedirectionNode(Position position, int fd, NonnullRefPtr<Node> path)
: Node(move(position))
, m_fd(fd)
, m_path(move(path))
{
}
void PathRedirectionNode::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(0x87, 0x9b, 0xcd) }); // 25% Darkened Periwinkle
metadata.is_first_in_list = false;
m_path->highlight_in_editor(editor, shell, metadata);
if (m_path->is_bareword()) {
auto path_text = m_path->run(nullptr)->resolve_as_list(nullptr);
VERIFY(path_text.size() == 1);
// Apply a URL to the path.
auto& position = m_path->position();
auto& path = path_text[0];
if (!path.starts_with('/'))
path = String::format("%s/%s", shell.cwd.characters(), path.characters());
auto url = URL::create_with_file_protocol(path);
url.set_host(shell.hostname);
editor.stylize({ position.start_offset, position.end_offset }, { Line::Style::Hyperlink(url.to_string()) });
}
}
HitTestResult PathRedirectionNode::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_path->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning)
result.closest_node_with_semantic_meaning = this;
return result;
}
Vector<Line::CompletionSuggestion> PathRedirectionNode::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node || !matching_node->is_bareword())
return {};
auto corrected_offset = offset - matching_node->position().start_offset;
auto* node = static_cast<BarewordLiteral*>(matching_node.ptr());
if (corrected_offset > node->text().length())
return {};
return shell.complete_path("", node->text(), corrected_offset);
}
PathRedirectionNode::~PathRedirectionNode()
{
}
void Range::dump(int level) const
{
Node::dump(level);
print_indented("(From)", level + 1);
m_start->dump(level + 2);
print_indented("(To)", level + 1);
m_end->dump(level + 2);
}
RefPtr<Value> Range::run(RefPtr<Shell> shell)
{
auto interpolate = [position = position()](RefPtr<Value> start, RefPtr<Value> end, RefPtr<Shell> shell) -> NonnullRefPtrVector<Value> {
NonnullRefPtrVector<Value> values;
if (start->is_string() && end->is_string()) {
auto start_str = start->resolve_as_list(shell)[0];
auto end_str = end->resolve_as_list(shell)[0];
Utf8View start_view { start_str }, end_view { end_str };
if (start_view.validate() && end_view.validate()) {
if (start_view.length() == 1 && end_view.length() == 1) {
// Interpolate between two code points.
auto start_code_point = *start_view.begin();
auto end_code_point = *end_view.begin();
auto step = start_code_point > end_code_point ? -1 : 1;
StringBuilder builder;
for (u32 code_point = start_code_point; code_point != end_code_point; code_point += step) {
builder.clear();
builder.append_code_point(code_point);
values.append(create<StringValue>(builder.to_string()));
}
// Append the ending code point too, most shells treat this as inclusive.
builder.clear();
builder.append_code_point(end_code_point);
values.append(create<StringValue>(builder.to_string()));
} else {
// Could be two numbers?
auto start_int = start_str.to_int();
auto end_int = end_str.to_int();
if (start_int.has_value() && end_int.has_value()) {
auto start = start_int.value();
auto end = end_int.value();
auto step = start > end ? -1 : 1;
for (int value = start; value != end; value += step)
values.append(create<StringValue>(String::number(value)));
// Append the range end too, most shells treat this as inclusive.
values.append(create<StringValue>(String::number(end)));
} else {
goto yield_start_end;
}
}
} else {
yield_start_end:;
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, String::formatted("Cannot interpolate between '{}' and '{}'!", start_str, end_str), position);
// We can't really interpolate between the two, so just yield both.
values.append(create<StringValue>(move(start_str)));
values.append(create<StringValue>(move(end_str)));
}
return values;
}
warnln("Shell: Cannot apply the requested interpolation");
return values;
};
auto start_value = m_start->run(shell);
auto end_value = m_end->run(shell);
if (!start_value || !end_value)
return create<ListValue>({});
return create<ListValue>(interpolate(*start_value, *end_value, shell));
}
void Range::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_start->highlight_in_editor(editor, shell, metadata);
// Highlight the '..'
editor.stylize({ m_start->position().end_offset, m_end->position().start_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Yellow) });
metadata.is_first_in_list = false;
m_end->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Range::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_start->hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = m_start;
return result;
}
result = m_end->hit_test_position(offset);
if (!result.closest_command_node)
result.closest_command_node = m_end;
return result;
}
Range::Range(Position position, NonnullRefPtr<Node> start, NonnullRefPtr<Node> end)
: Node(move(position))
, m_start(move(start))
, m_end(move(end))
{
if (m_start->is_syntax_error())
set_is_syntax_error(m_start->syntax_error_node());
else if (m_end->is_syntax_error())
set_is_syntax_error(m_end->syntax_error_node());
}
Range::~Range()
{
}
void ReadRedirection::dump(int level) const
{
Node::dump(level);
m_path->dump(level + 1);
print_indented(String::format("To %d", m_fd), level + 1);
}
RefPtr<Value> ReadRedirection::run(RefPtr<Shell> shell)
{
Command command;
auto path_segments = m_path->run(shell)->resolve_as_list(shell);
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(PathRedirection::create(builder.to_string(), m_fd, PathRedirection::Read));
return create<CommandValue>(move(command));
}
ReadRedirection::ReadRedirection(Position position, int fd, NonnullRefPtr<Node> path)
: PathRedirectionNode(move(position), fd, move(path))
{
}
ReadRedirection::~ReadRedirection()
{
}
void ReadWriteRedirection::dump(int level) const
{
Node::dump(level);
m_path->dump(level + 1);
print_indented(String::format("To/From %d", m_fd), level + 1);
}
RefPtr<Value> ReadWriteRedirection::run(RefPtr<Shell> shell)
{
Command command;
auto path_segments = m_path->run(shell)->resolve_as_list(shell);
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(PathRedirection::create(builder.to_string(), m_fd, PathRedirection::ReadWrite));
return create<CommandValue>(move(command));
}
ReadWriteRedirection::ReadWriteRedirection(Position position, int fd, NonnullRefPtr<Node> path)
: PathRedirectionNode(move(position), fd, move(path))
{
}
ReadWriteRedirection::~ReadWriteRedirection()
{
}
void Sequence::dump(int level) const
{
Node::dump(level);
for (auto& entry : m_entries)
entry.dump(level + 1);
}
RefPtr<Value> Sequence::run(RefPtr<Shell> shell)
{
Vector<Command> all_commands;
Command* last_command_in_sequence = nullptr;
for (auto& entry : m_entries) {
if (!last_command_in_sequence) {
auto commands = entry.to_lazy_evaluated_commands(shell);
all_commands.append(move(commands));
last_command_in_sequence = &all_commands.last();
continue;
}
if (last_command_in_sequence->should_wait) {
last_command_in_sequence->next_chain.append(NodeWithAction { entry, NodeWithAction::Sequence });
} else {
all_commands.append(entry.to_lazy_evaluated_commands(shell));
last_command_in_sequence = &all_commands.last();
}
}
return create<CommandSequenceValue>(move(all_commands));
}
void Sequence::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
for (auto& entry : m_entries)
entry.highlight_in_editor(editor, shell, metadata);
}
HitTestResult Sequence::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
for (auto& entry : m_entries) {
auto result = entry.hit_test_position(offset);
if (result.matching_node) {
if (!result.closest_command_node)
result.closest_command_node = entry;
return result;
}
}
return {};
}
Sequence::Sequence(Position position, NonnullRefPtrVector<Node> entries, Vector<Position> separator_positions)
: Node(move(position))
, m_entries(move(entries))
, m_separator_positions(separator_positions)
{
for (auto& entry : m_entries) {
if (entry.is_syntax_error()) {
set_is_syntax_error(entry.syntax_error_node());
break;
}
}
}
Sequence::~Sequence()
{
}
void Subshell::dump(int level) const
{
Node::dump(level);
if (m_block)
m_block->dump(level + 1);
}
RefPtr<Value> Subshell::run(RefPtr<Shell> shell)
{
if (!m_block)
return create<ListValue>({});
return create<AST::CommandSequenceValue>(m_block->to_lazy_evaluated_commands(shell));
}
void Subshell::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
metadata.is_first_in_list = true;
if (m_block)
m_block->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Subshell::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (m_block)
return m_block->hit_test_position(offset);
return {};
}
Subshell::Subshell(Position position, RefPtr<Node> block)
: Node(move(position))
, m_block(block)
{
if (m_block && m_block->is_syntax_error())
set_is_syntax_error(m_block->syntax_error_node());
}
Subshell::~Subshell()
{
}
void Slice::dump(int level) const
{
Node::dump(level);
m_selector->dump(level + 1);
}
RefPtr<Value> Slice::run(RefPtr<Shell> shell)
{
return m_selector->run(shell);
}
void Slice::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_selector->highlight_in_editor(editor, shell, metadata);
}
HitTestResult Slice::hit_test_position(size_t offset) const
{
return m_selector->hit_test_position(offset);
}
Vector<Line::CompletionSuggestion> Slice::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
// TODO: Maybe intercept this, and suggest values in range?
return m_selector->complete_for_editor(shell, offset, hit_test_result);
}
Slice::Slice(Position position, NonnullRefPtr<AST::Node> selector)
: Node(move(position))
, m_selector(move(selector))
{
if (m_selector->is_syntax_error())
set_is_syntax_error(m_selector->syntax_error_node());
}
Slice::~Slice()
{
}
void SimpleVariable::dump(int level) const
{
Node::dump(level);
print_indented("(Name)", level + 1);
print_indented(m_name, level + 2);
print_indented("(Slice)", level + 1);
if (m_slice)
m_slice->dump(level + 2);
else
print_indented("(None)", level + 2);
}
RefPtr<Value> SimpleVariable::run(RefPtr<Shell>)
{
NonnullRefPtr<Value> value = create<SimpleVariableValue>(m_name);
if (m_slice)
value = value->with_slices(*m_slice);
return value;
}
void SimpleVariable::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
Line::Style style { Line::Style::Foreground(214, 112, 214) };
if (metadata.is_first_in_list)
style.unify_with({ Line::Style::Bold });
editor.stylize({ m_position.start_offset, m_position.end_offset }, move(style));
if (m_slice)
m_slice->highlight_in_editor(editor, shell, metadata);
}
HitTestResult SimpleVariable::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (m_slice && m_slice->position().contains(offset))
return m_slice->hit_test_position(offset);
return { this, this, nullptr };
}
Vector<Line::CompletionSuggestion> SimpleVariable::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node)
return {};
if (matching_node != this)
return {};
auto corrected_offset = offset - matching_node->position().start_offset - 1;
if (corrected_offset > m_name.length() + 1)
return {};
return shell.complete_variable(m_name, corrected_offset);
}
SimpleVariable::SimpleVariable(Position position, String name)
: VariableNode(move(position))
, m_name(move(name))
{
}
SimpleVariable::~SimpleVariable()
{
}
void SpecialVariable::dump(int level) const
{
Node::dump(level);
print_indented("(Name)", level + 1);
print_indented(String { &m_name, 1 }, level + 1);
print_indented("(Slice)", level + 1);
if (m_slice)
m_slice->dump(level + 2);
else
print_indented("(None)", level + 2);
}
RefPtr<Value> SpecialVariable::run(RefPtr<Shell>)
{
NonnullRefPtr<Value> value = create<SpecialVariableValue>(m_name);
if (m_slice)
value = value->with_slices(*m_slice);
return value;
}
void SpecialVariable::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(214, 112, 214) });
if (m_slice)
m_slice->highlight_in_editor(editor, shell, metadata);
}
Vector<Line::CompletionSuggestion> SpecialVariable::complete_for_editor(Shell&, size_t, const HitTestResult&)
{
return {};
}
HitTestResult SpecialVariable::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
if (m_slice && m_slice->position().contains(offset))
return m_slice->hit_test_position(offset);
return { this, this, nullptr };
}
SpecialVariable::SpecialVariable(Position position, char name)
: VariableNode(move(position))
, m_name(name)
{
}
SpecialVariable::~SpecialVariable()
{
}
void Juxtaposition::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> Juxtaposition::run(RefPtr<Shell> shell)
{
auto left_value = m_left->run(shell)->resolve_without_cast(shell);
auto right_value = m_right->run(shell)->resolve_without_cast(shell);
auto left = left_value->resolve_as_list(shell);
auto right = right_value->resolve_as_list(shell);
if (left_value->is_string() && right_value->is_string()) {
VERIFY(left.size() == 1);
VERIFY(right.size() == 1);
StringBuilder builder;
builder.append(left[0]);
builder.append(right[0]);
return create<StringValue>(builder.to_string());
}
// Otherwise, treat them as lists and create a list product.
if (left.is_empty() || right.is_empty())
return create<ListValue>({});
Vector<String> result;
result.ensure_capacity(left.size() * right.size());
StringBuilder builder;
for (auto& left_element : left) {
for (auto& right_element : right) {
builder.append(left_element);
builder.append(right_element);
result.append(builder.to_string());
builder.clear();
}
}
return create<ListValue>(move(result));
}
void Juxtaposition::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_left->highlight_in_editor(editor, shell, metadata);
// '~/foo/bar' is special, we have to actually resolve the tilde
// since that resolution is a pure operation, we can just go ahead
// and do it to get the value :)
if (m_right->is_bareword() && m_left->is_tilde()) {
auto tilde_value = m_left->run(shell)->resolve_as_list(shell)[0];
auto bareword_value = m_right->run(shell)->resolve_as_list(shell)[0];
StringBuilder path_builder;
path_builder.append(tilde_value);
path_builder.append("/");
path_builder.append(bareword_value);
auto path = path_builder.to_string();
if (Core::File::exists(path)) {
auto realpath = shell.resolve_path(path);
auto url = URL::create_with_file_protocol(realpath);
url.set_host(shell.hostname);
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Hyperlink(url.to_string()) });
}
} else {
m_right->highlight_in_editor(editor, shell, metadata);
}
}
Vector<Line::CompletionSuggestion> Juxtaposition::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
// '~/foo/bar' is special, we have to actually resolve the tilde
// then complete the bareword with that path prefix.
if (m_right->is_bareword() && m_left->is_tilde()) {
auto tilde_value = m_left->run(shell)->resolve_as_list(shell)[0];
auto corrected_offset = offset - matching_node->position().start_offset;
auto* node = static_cast<BarewordLiteral*>(matching_node.ptr());
if (corrected_offset > node->text().length())
return {};
auto text = node->text().substring(1, node->text().length() - 1);
return shell.complete_path(tilde_value, text, corrected_offset - 1);
}
return Node::complete_for_editor(shell, offset, hit_test_result);
}
HitTestResult Juxtaposition::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning)
result.closest_node_with_semantic_meaning = this;
if (result.matching_node)
return result;
result = m_right->hit_test_position(offset);
if (!result.closest_node_with_semantic_meaning)
result.closest_node_with_semantic_meaning = this;
return result;
}
Juxtaposition::Juxtaposition(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
Juxtaposition::~Juxtaposition()
{
}
void StringLiteral::dump(int level) const
{
Node::dump(level);
print_indented(m_text, level + 1);
}
RefPtr<Value> StringLiteral::run(RefPtr<Shell>)
{
return create<StringValue>(m_text);
}
void StringLiteral::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata metadata)
{
if (m_text.is_empty())
return;
Line::Style style { Line::Style::Foreground(Line::Style::XtermColor::Yellow) };
if (metadata.is_first_in_list)
style.unify_with({ Line::Style::Bold });
editor.stylize({ m_position.start_offset, m_position.end_offset }, move(style));
}
StringLiteral::StringLiteral(Position position, String text)
: Node(move(position))
, m_text(move(text))
{
}
StringLiteral::~StringLiteral()
{
}
void StringPartCompose::dump(int level) const
{
Node::dump(level);
m_left->dump(level + 1);
m_right->dump(level + 1);
}
RefPtr<Value> StringPartCompose::run(RefPtr<Shell> shell)
{
auto left = m_left->run(shell)->resolve_as_list(shell);
auto right = m_right->run(shell)->resolve_as_list(shell);
StringBuilder builder;
builder.join(" ", left);
builder.join(" ", right);
return create<StringValue>(builder.to_string());
}
void StringPartCompose::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
m_left->highlight_in_editor(editor, shell, metadata);
m_right->highlight_in_editor(editor, shell, metadata);
}
HitTestResult StringPartCompose::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
auto result = m_left->hit_test_position(offset);
if (result.matching_node)
return result;
return m_right->hit_test_position(offset);
}
StringPartCompose::StringPartCompose(Position position, NonnullRefPtr<Node> left, NonnullRefPtr<Node> right)
: Node(move(position))
, m_left(move(left))
, m_right(move(right))
{
if (m_left->is_syntax_error())
set_is_syntax_error(m_left->syntax_error_node());
else if (m_right->is_syntax_error())
set_is_syntax_error(m_right->syntax_error_node());
}
StringPartCompose::~StringPartCompose()
{
}
void SyntaxError::dump(int level) const
{
Node::dump(level);
print_indented("(Error text)", level + 1);
print_indented(m_syntax_error_text, level + 2);
print_indented("(Can be recovered from)", level + 1);
print_indented(String::formatted("{}", m_is_continuable), level + 2);
}
RefPtr<Value> SyntaxError::run(RefPtr<Shell> shell)
{
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, m_syntax_error_text, position());
return create<StringValue>("");
}
void SyntaxError::highlight_in_editor(Line::Editor& editor, Shell&, HighlightMetadata)
{
editor.stylize({ m_position.start_offset, m_position.end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Red), Line::Style::Bold });
}
SyntaxError::SyntaxError(Position position, String error, bool is_continuable)
: Node(move(position))
, m_syntax_error_text(move(error))
, m_is_continuable(is_continuable)
{
m_is_syntax_error = true;
}
const SyntaxError& SyntaxError::syntax_error_node() const
{
return *this;
}
SyntaxError::~SyntaxError()
{
}
void SyntheticNode::dump(int level) const
{
Node::dump(level);
}
RefPtr<Value> SyntheticNode::run(RefPtr<Shell>)
{
return m_value;
}
void SyntheticNode::highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata)
{
}
SyntheticNode::SyntheticNode(Position position, NonnullRefPtr<Value> value)
: Node(move(position))
, m_value(move(value))
{
}
void Tilde::dump(int level) const
{
Node::dump(level);
print_indented(m_username, level + 1);
}
RefPtr<Value> Tilde::run(RefPtr<Shell>)
{
return create<TildeValue>(m_username);
}
void Tilde::highlight_in_editor(Line::Editor&, Shell&, HighlightMetadata)
{
}
HitTestResult Tilde::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
return { this, this, nullptr };
}
Vector<Line::CompletionSuggestion> Tilde::complete_for_editor(Shell& shell, size_t offset, const HitTestResult& hit_test_result)
{
auto matching_node = hit_test_result.matching_node;
if (!matching_node)
return {};
if (matching_node != this)
return {};
auto corrected_offset = offset - matching_node->position().start_offset - 1;
if (corrected_offset > m_username.length() + 1)
return {};
return shell.complete_user(m_username, corrected_offset);
}
String Tilde::text() const
{
StringBuilder builder;
builder.append('~');
builder.append(m_username);
return builder.to_string();
}
Tilde::Tilde(Position position, String username)
: Node(move(position))
, m_username(move(username))
{
}
Tilde::~Tilde()
{
}
void WriteAppendRedirection::dump(int level) const
{
Node::dump(level);
m_path->dump(level + 1);
print_indented(String::format("From %d", m_fd), level + 1);
}
RefPtr<Value> WriteAppendRedirection::run(RefPtr<Shell> shell)
{
Command command;
auto path_segments = m_path->run(shell)->resolve_as_list(shell);
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(PathRedirection::create(builder.to_string(), m_fd, PathRedirection::WriteAppend));
return create<CommandValue>(move(command));
}
WriteAppendRedirection::WriteAppendRedirection(Position position, int fd, NonnullRefPtr<Node> path)
: PathRedirectionNode(move(position), fd, move(path))
{
}
WriteAppendRedirection::~WriteAppendRedirection()
{
}
void WriteRedirection::dump(int level) const
{
Node::dump(level);
m_path->dump(level + 1);
print_indented(String::format("From %d", m_fd), level + 1);
}
RefPtr<Value> WriteRedirection::run(RefPtr<Shell> shell)
{
Command command;
auto path_segments = m_path->run(shell)->resolve_as_list(shell);
StringBuilder builder;
builder.join(" ", path_segments);
command.redirections.append(PathRedirection::create(builder.to_string(), m_fd, PathRedirection::Write));
return create<CommandValue>(move(command));
}
WriteRedirection::WriteRedirection(Position position, int fd, NonnullRefPtr<Node> path)
: PathRedirectionNode(move(position), fd, move(path))
{
}
WriteRedirection::~WriteRedirection()
{
}
void VariableDeclarations::dump(int level) const
{
Node::dump(level);
for (auto& var : m_variables) {
print_indented("Set", level + 1);
var.name->dump(level + 2);
var.value->dump(level + 2);
}
}
RefPtr<Value> VariableDeclarations::run(RefPtr<Shell> shell)
{
for (auto& var : m_variables) {
auto name_value = var.name->run(shell)->resolve_as_list(shell);
VERIFY(name_value.size() == 1);
auto name = name_value[0];
auto value = var.value->run(shell);
shell->set_local_variable(name, value.release_nonnull());
}
return create<ListValue>({});
}
void VariableDeclarations::highlight_in_editor(Line::Editor& editor, Shell& shell, HighlightMetadata metadata)
{
metadata.is_first_in_list = false;
for (auto& var : m_variables) {
var.name->highlight_in_editor(editor, shell, metadata);
// Highlight the '='.
editor.stylize({ var.name->position().end_offset - 1, var.name->position().end_offset }, { Line::Style::Foreground(Line::Style::XtermColor::Blue) });
var.value->highlight_in_editor(editor, shell, metadata);
}
}
HitTestResult VariableDeclarations::hit_test_position(size_t offset) const
{
if (!position().contains(offset))
return {};
for (auto decl : m_variables) {
auto result = decl.value->hit_test_position(offset);
if (result.matching_node)
return result;
}
return { nullptr, nullptr, nullptr };
}
VariableDeclarations::VariableDeclarations(Position position, Vector<Variable> variables)
: Node(move(position))
, m_variables(move(variables))
{
for (auto& decl : m_variables) {
if (decl.name->is_syntax_error()) {
set_is_syntax_error(decl.name->syntax_error_node());
break;
}
if (decl.value->is_syntax_error()) {
set_is_syntax_error(decl.value->syntax_error_node());
break;
}
}
}
VariableDeclarations::~VariableDeclarations()
{
}
Value::~Value()
{
}
Vector<AST::Command> Value::resolve_as_commands(RefPtr<Shell> shell)
{
Command command;
command.argv = resolve_as_list(shell);
return { command };
}
ListValue::ListValue(Vector<String> values)
{
if (values.is_empty())
return;
m_contained_values.ensure_capacity(values.size());
for (auto& str : values)
m_contained_values.append(adopt(*new StringValue(move(str))));
}
NonnullRefPtr<Value> Value::with_slices(NonnullRefPtr<Slice> slice) const&
{
auto value = clone();
value->m_slices.append(move(slice));
return value;
}
NonnullRefPtr<Value> Value::with_slices(NonnullRefPtrVector<Slice> slices) const&
{
auto value = clone();
value->m_slices.append(move(slices));
return value;
}
ListValue::~ListValue()
{
}
Vector<String> ListValue::resolve_as_list(RefPtr<Shell> shell)
{
Vector<String> values;
for (auto& value : m_contained_values)
values.append(value.resolve_as_list(shell));
return resolve_slices(shell, move(values), m_slices);
}
NonnullRefPtr<Value> ListValue::resolve_without_cast(RefPtr<Shell> shell)
{
NonnullRefPtrVector<Value> values;
for (auto& value : m_contained_values)
values.append(value.resolve_without_cast(shell));
NonnullRefPtr<Value> value = create<ListValue>(move(values));
if (!m_slices.is_empty())
value = value->with_slices(m_slices);
return value;
}
CommandValue::~CommandValue()
{
}
CommandSequenceValue::~CommandSequenceValue()
{
}
Vector<String> CommandSequenceValue::resolve_as_list(RefPtr<Shell> shell)
{
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "Unexpected cast of a command sequence to a list");
return {};
}
Vector<Command> CommandSequenceValue::resolve_as_commands(RefPtr<Shell>)
{
return m_contained_values;
}
Vector<String> CommandValue::resolve_as_list(RefPtr<Shell> shell)
{
shell->raise_error(Shell::ShellError::EvaluatedSyntaxError, "Unexpected cast of a command to a list");
return {};
}
Vector<Command> CommandValue::resolve_as_commands(RefPtr<Shell>)
{
return { m_command };
}
JobValue::~JobValue()
{
}
StringValue::~StringValue()
{
}
Vector<String> StringValue::resolve_as_list(RefPtr<Shell> shell)
{
if (is_list()) {
auto parts = StringView(m_string).split_view(m_split, m_keep_empty);
Vector<String> result;
result.ensure_capacity(parts.size());
for (auto& part : parts)
result.append(part);
return resolve_slices(shell, move(result), m_slices);
}
return { resolve_slices(shell, String { m_string }, m_slices) };
}
NonnullRefPtr<Value> StringValue::resolve_without_cast(RefPtr<Shell> shell)
{
if (is_list())
return create<AST::ListValue>(resolve_as_list(shell)); // No need to reapply the slices.
return *this;
}
GlobValue::~GlobValue()
{
}
Vector<String> GlobValue::resolve_as_list(RefPtr<Shell> shell)
{
if (!shell)
return { resolve_slices(shell, String { m_glob }, m_slices) };
auto results = shell->expand_globs(m_glob, shell->cwd);
if (results.is_empty())
shell->raise_error(Shell::ShellError::InvalidGlobError, "Glob did not match anything!", m_generation_position);
return resolve_slices(shell, move(results), m_slices);
}
SimpleVariableValue::~SimpleVariableValue()
{
}
Vector<String> SimpleVariableValue::resolve_as_list(RefPtr<Shell> shell)
{
if (!shell)
return resolve_slices(shell, Vector<String> {}, m_slices);
if (auto value = resolve_without_cast(shell); value != this)
return value->resolve_as_list(shell);
char* env_value = getenv(m_name.characters());
if (env_value == nullptr)
return { resolve_slices(shell, "", m_slices) };
return { resolve_slices(shell, String { env_value }, m_slices) };
}
NonnullRefPtr<Value> SimpleVariableValue::resolve_without_cast(RefPtr<Shell> shell)
{
VERIFY(shell);
if (auto value = shell->lookup_local_variable(m_name)) {
auto result = value.release_nonnull();
// If a slice is applied, add it.
if (!m_slices.is_empty())
result = result->with_slices(m_slices);
return result;
}
return *this;
}
SpecialVariableValue::~SpecialVariableValue()
{
}
Vector<String> SpecialVariableValue::resolve_as_list(RefPtr<Shell> shell)
{
if (!shell)
return {};
switch (m_name) {
case '?':
return { resolve_slices(shell, String::number(shell->last_return_code), m_slices) };
case '$':
return { resolve_slices(shell, String::number(getpid()), m_slices) };
case '*':
if (auto argv = shell->lookup_local_variable("ARGV"))
return resolve_slices(shell, argv->resolve_as_list(shell), m_slices);
return resolve_slices(shell, Vector<String> {}, m_slices);
case '#':
if (auto argv = shell->lookup_local_variable("ARGV")) {
if (argv->is_list()) {
auto list_argv = static_cast<AST::ListValue*>(argv.ptr());
return { resolve_slices(shell, String::number(list_argv->values().size()), m_slices) };
}
return { resolve_slices(shell, "1", m_slices) };
}
return { resolve_slices(shell, "0", m_slices) };
default:
return { resolve_slices(shell, "", m_slices) };
}
}
TildeValue::~TildeValue()
{
}
Vector<String> TildeValue::resolve_as_list(RefPtr<Shell> shell)
{
StringBuilder builder;
builder.append("~");
builder.append(m_username);
if (!shell)
return { resolve_slices(shell, builder.to_string(), m_slices) };
return { resolve_slices(shell, shell->expand_tilde(builder.to_string()), m_slices) };
}
Result<NonnullRefPtr<Rewiring>, String> CloseRedirection::apply() const
{
return adopt(*new Rewiring(fd, fd, Rewiring::Close::ImmediatelyCloseNew));
}
CloseRedirection::~CloseRedirection()
{
}
Result<NonnullRefPtr<Rewiring>, String> PathRedirection::apply() const
{
auto check_fd_and_return = [my_fd = this->fd](int fd, const String& path) -> Result<NonnullRefPtr<Rewiring>, String> {
if (fd < 0) {
String error = strerror(errno);
dbgln("open() failed for '{}' with {}", path, error);
return error;
}
return adopt(*new Rewiring(fd, my_fd, Rewiring::Close::Old));
};
switch (direction) {
case AST::PathRedirection::WriteAppend:
return check_fd_and_return(open(path.characters(), O_WRONLY | O_CREAT | O_APPEND, 0666), path);
case AST::PathRedirection::Write:
return check_fd_and_return(open(path.characters(), O_WRONLY | O_CREAT | O_TRUNC, 0666), path);
case AST::PathRedirection::Read:
return check_fd_and_return(open(path.characters(), O_RDONLY), path);
case AST::PathRedirection::ReadWrite:
return check_fd_and_return(open(path.characters(), O_RDWR | O_CREAT, 0666), path);
}
VERIFY_NOT_REACHED();
}
PathRedirection::~PathRedirection()
{
}
FdRedirection::~FdRedirection()
{
}
Redirection::~Redirection()
{
}
}
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