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@@ -0,0 +1,171 @@
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+#!/usr/bin/env python3
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+
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+import argparse
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+import functools
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+import operator
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+import os
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+import shutil
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+import subprocess
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+import time
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+
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+
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+def system(cmd: str) -> None:
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+ subprocess.run(cmd, shell=True, check=True)
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+
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+
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+parser = argparse.ArgumentParser(usage="Build a patched Fedora kernel")
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+
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+parser.add_argument(
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+ "--package-name",
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+ help="The name of the patched package (e.g. foo -> kernel-foo).",
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+ required=True,
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+)
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+
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+parser.add_argument(
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+ "--package-tag",
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+ help="The upstream tag to build.",
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+ required=True,
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+)
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+
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+parser.add_argument(
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+ "--package-release",
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+ help="The release suffix of the modified package.",
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+ required=True,
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+)
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+
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+parser.add_argument(
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+ "--ark-dir",
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+ help="The local path to the kernel-ark repository.",
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+ default="kernel-ark",
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+)
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+
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+parser.add_argument(
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+ "--ark-url",
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+ help="The remote path to the kernel-ark repository.",
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+ default="https://gitlab.com/cki-project/kernel-ark",
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+)
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+
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+parser.add_argument(
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+ "--patch",
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+ help="Applies a patch to the kernel source.",
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+ action="append",
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+ nargs="+",
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+)
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+
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+parser.add_argument(
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+ "--config",
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+ help="Applies a KConfig fragment to the kernel source.",
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+ action="append",
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+ nargs="+",
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+)
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+
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+parser.add_argument(
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+ "--file",
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+ help="Copy a file into the RPM buildroot.",
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+ action="append",
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+ nargs="+",
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+)
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+
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+parser.add_argument(
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+ "--buildopts",
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+ help="Enable or disable options of the kernel spec file.",
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+ action="append",
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+ nargs="+",
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+)
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+
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+parser.add_argument(
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+ "--outdir",
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+ help="The directory where the built RPM files will be saved.",
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+ default="out",
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+)
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+
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+args = parser.parse_args()
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+
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+patches = [] if not args.patch else functools.reduce(operator.add, args.patch)
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+configs = [] if not args.config else functools.reduce(operator.add, args.config)
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+files = [] if not args.file else functools.reduce(operator.add, args.file)
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+buildopts = [] if not args.buildopts else functools.reduce(operator.add, args.buildopts)
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+
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+# Make paths absolute.
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+patches = [os.path.realpath(x) for x in patches]
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+configs = [os.path.realpath(x) for x in configs]
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+files = [os.path.realpath(x) for x in files]
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+outdir = os.path.realpath(args.outdir)
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+
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+# Clone the kernel-ark repository if it doesn't exist.
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+if not os.path.exists(args.ark_dir):
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+ system("git clone '%s' '%s'" % (args.ark_url, args.ark_dir))
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+
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+os.chdir(args.ark_dir)
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+
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+# Check out the requested tag.
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+system("git fetch --tags")
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+system("git clean -dfx")
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+system("git checkout -b 'build/%s'" % time.time())
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+system("git reset --hard '%s'" % args.package_tag)
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+
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+# Apply patches
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+for patch in patches:
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+ system("git am '%s'" % patch)
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+
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+# Copy files
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+for file in files:
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+ shutil.copy(file, "redhat/fedora_files/")
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+
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+# Apply config options
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+#
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+# The format that the kernel-ark tree expects is a bit different from
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+# a standard kernel config. Every option is split into a single file
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+# named after that config.
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+#
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+# Example:
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+# $ cat redhat/configs/common/generic/CONFIG_PCI
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+# CONFIG_PCI=y
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+#
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+# This supposedly makes things easier for Red Hat developers,
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+# but it also ends up being really annoying for us.
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+for config in configs:
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+ with open(config) as f:
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+ lines = f.readlines()
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+
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+ # Filter out comments, this means only selecting lines that look like:
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+ # - CONFIG_FOO=b
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+ # - # CONFIG_FOO is not set
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+ for line in lines:
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+ enable = line.startswith("CONFIG_")
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+ disable = line.startswith("# CONFIG_")
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+
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+ if not enable and not disable:
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+ continue
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+
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+ NAME = ""
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+
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+ if enable:
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+ NAME = line.split("=")[0]
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+ elif disable:
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+ NAME = line[2:].split(" ")[0]
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+
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+ print("Applying %s" % line.rstrip("\n"))
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+
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+ with open("redhat/configs/custom-overrides/generic/%s" % NAME, "w") as f:
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+ f.write(line)
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+
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+system("git add redhat/configs/custom-overrides/generic")
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+system("git commit -m 'Merge %s config'" % args.package_name)
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+
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+cmd = []
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+cmd.append("make")
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+cmd.append("dist-rpms")
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+cmd.append("SPECPACKAGE_NAME='kernel-%s'" % args.package_name)
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+cmd.append("DISTLOCALVERSION='.%s'" % args.package_name)
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+cmd.append("BUILD='%s'" % args.package_release)
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+
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+if len(buildopts) > 0:
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+ cmd.append("BUILDOPTS='%s'" % " ".join(buildopts))
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+
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+# Build RPMS
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+system(" ".join(cmd))
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+
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+# Copy built RPMS to output directory
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+os.makedirs(outdir, exist_ok=True)
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+system("cp -r redhat/rpm/RPMS/* '%s'" % outdir)
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Dorian Stoll