49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package dockerignore
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import (
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"bufio"
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"bytes"
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"fmt"
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"io"
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"path/filepath"
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"strings"
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)
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// ReadAll reads a .dockerignore file and returns the list of file patterns
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// to ignore. Note this will trim whitespace from each line as well
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// as use GO's "clean" func to get the shortest/cleanest path for each.
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func ReadAll(reader io.Reader) ([]string, error) {
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if reader == nil {
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return nil, nil
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}
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scanner := bufio.NewScanner(reader)
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var excludes []string
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currentLine := 0
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utf8bom := []byte{0xEF, 0xBB, 0xBF}
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for scanner.Scan() {
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scannedBytes := scanner.Bytes()
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// We trim UTF8 BOM
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if currentLine == 0 {
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scannedBytes = bytes.TrimPrefix(scannedBytes, utf8bom)
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}
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pattern := string(scannedBytes)
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currentLine++
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// Lines starting with # (comments) are ignored before processing
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if strings.HasPrefix(pattern, "#") {
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continue
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}
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pattern = strings.TrimSpace(pattern)
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if pattern == "" {
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continue
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}
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pattern = filepath.Clean(pattern)
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pattern = filepath.ToSlash(pattern)
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excludes = append(excludes, pattern)
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}
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if err := scanner.Err(); err != nil {
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return nil, fmt.Errorf("Error reading .dockerignore: %v", err)
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}
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return excludes, nil
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}
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