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#!/usr/bin/env bash
# A little script I whipped up to make it easy to
# patch source trees and have sane error handling
# -Erik
#
# (c) 2002 Erik Andersen <andersen@codepoet.org>
#
# Parameters:
# - "-s", optional. Silent operation, don't print anything if there
# isn't any error.
# - the build directory, optional, default value is '.'. The place where are
# the package sources.
# - the patch directory, optional, default '../kernel-patches'. The place
# where are the scripts you want to apply.
# - other parameters are the patch name patterns, optional, default value is
# '*'. Pattern(s) describing the patch names you want to apply.
#
# The script will look recursively for patches from the patch directory. If a
# file named 'series' exists then the patches mentioned in it will be applied
# as plain patches, regardless of their file name. If no 'series' file exists,
# the script will look for file names matching pattern(s). If the name
# ends with '.tar.*', '.tbz2' or '.tgz', the file is considered as an archive
# and will be uncompressed into a directory named
# '.patches-name_of_the_archive-unpacked'. It's the turn of this directory to
# be scanned with '*' as pattern. Remember that scanning is recursive. Other
# files than series file and archives are considered as a patch.
#
# Once a patch is found, the script will try to apply it. If its name doesn't
# end with '.gz', '.bz', '.bz2', '.xz', '.zip', '.Z', '.diff*' or '.patch*',
# it will be skipped. If necessary, the patch will be uncompressed before being
# applied. The list of the patches applied is stored in '.applied_patches_list'
# file in the build directory.
set -e
silent=
if [ "$1" = "-s" ] ; then
# add option to be used by the patch tool
silent=-s
shift
fi
# Set directories from arguments, or use defaults.
builddir=${1-.}
patchdir=${2-../kernel-patches}
shift 2
patchpattern=${@-*}
# use a well defined sorting order
export LC_COLLATE=C
if [ ! -d "${builddir}" ] ; then
echo "Aborting. '${builddir}' is not a directory."
exit 1
fi
if [ ! -d "${patchdir}" ] ; then
echo "Aborting. '${patchdir}' is not a directory."
exit 1
fi
# Remove any rejects present BEFORE patching - Because if there are
# any, even if patches are well applied, at the end it will complain
# about rejects in builddir.
find ${builddir}/ '(' -name '*.rej' -o -name '.*.rej' ')' -print0 | \
xargs -0 -r rm -f
function apply_patch {
path="${1%%/}"
patch="${2}"
case "${path}" in
/*) ;;
*) path="$PWD/${path}";;
esac
if [ "$3" ]; then
type="series"; uncomp="cat"
else
case "$patch" in
*.gz)
type="gzip"; uncomp="gunzip -dc"; ;;
*.bz)
type="bzip"; uncomp="bunzip -dc"; ;;
*.bz2)
type="bzip2"; uncomp="bunzip2 -dc"; ;;
*.xz)
type="xz"; uncomp="unxz -dc"; ;;
*.zip)
type="zip"; uncomp="unzip -d"; ;;
*.Z)
type="compress"; uncomp="uncompress -c"; ;;
*.diff*)
type="diff"; uncomp="cat"; ;;
*.patch*)
type="patch"; uncomp="cat"; ;;
*)
echo "Unsupported file type for ${path}/${patch}, skipping";
return 0
;;
esac
fi
if [ -z "$silent" ] ; then
echo ""
echo "Applying $patch using ${type}: "
fi
if [ ! -e "${path}/$patch" ] ; then
echo "Error: missing patch file ${path}/$patch"
exit 1
fi
existing="$(grep -E "/${patch}\$" ${builddir}/.applied_patches_list || true)"
if [ -n "${existing}" ]; then
echo "Error: duplicate filename '${patch}'"
echo "Conflicting files are:"
echo " already applied: ${existing}"
echo " to be applied : ${path}/${patch}"
exit 1
fi
echo "${path}/${patch}" >> ${builddir}/.applied_patches_list
${uncomp} "${path}/$patch" | patch -g0 -p1 -E -d "${builddir}" -t -N $silent
if [ $? != 0 ] ; then
echo "Patch failed! Please fix ${patch}!"
exit 1
fi
}
function scan_patchdir {
local path=$1
shift 1
patches=${@-*}
# If there is a series file, use it instead of using ls sort order
# to apply patches. Skip line starting with a dash.
if [ -e "${path}/series" ] ; then
# The format of a series file accepts a second field that is
# used to specify the number of directory components to strip
# when applying the patch, in the form -pN (N an integer >= 0)
# We assume this field to always be -p1 whether it is present
# or missing.
series_patches="`grep -Ev "^#" ${path}/series | cut -d ' ' -f1 2> /dev/null`"
for i in $series_patches; do
apply_patch "$path" "$i" series
done
else
for i in `cd $path; ls -d $patches 2> /dev/null` ; do
if [ -d "${path}/$i" ] ; then
scan_patchdir "${path}/$i"
elif echo "$i" | grep -q -E "\.tar(\..*)?$|\.tbz2?$|\.tgz$" ; then
unpackedarchivedir="$builddir/.patches-$(basename $i)-unpacked"
rm -rf "$unpackedarchivedir" 2> /dev/null
mkdir "$unpackedarchivedir"
tar -C "$unpackedarchivedir" -xaf "${path}/$i"
scan_patchdir "$unpackedarchivedir"
else
apply_patch "$path" "$i"
fi
done
fi
}
touch ${builddir}/.applied_patches_list
scan_patchdir "$patchdir" "$patchpattern"
# Check for rejects...
if [ "`find $builddir/ '(' -name '*.rej' -o -name '.*.rej' ')' -print`" ] ; then
echo "Aborting. Reject files found."
exit 1
fi
# Remove backup files
find $builddir/ '(' -name '*.orig' -o -name '.*.orig' ')' -exec rm -f {} \;
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