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path: root/support/scripts/apply-patches.sh
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#! /bin/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>

# Set directories from arguments, or use defaults.
builddir=${1-.}
patchdir=${2-../kernel-patches}
shift 2
patchpattern=${@-*}

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=$2
    case "$patch" in
	*.gz)
	type="gzip"; uncomp="gunzip -dc"; ;; 
	*.bz)
	type="bzip"; uncomp="bunzip -dc"; ;; 
	*.bz2)
	type="bzip2"; uncomp="bunzip2 -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 format file for ${patch}, skip it";
	return 0;
	;;
    esac
    echo ""
    echo "Applying $patch using ${type}: "
	echo $patch >> ${builddir}/.applied_patches_list
    ${uncomp} "${path}/$patch" | patch -g0 -p1 -E -d "${builddir}"
    if [ $? != 0 ] ; then
        echo "Patch failed!  Please fix ${patch}!"
	exit 1
    fi
}

function scan_patchdir {
    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
        for i in `grep -Ev "^#" ${path}/series 2> /dev/null` ; do
            apply_patch "$path" "$i" || exit 1
        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" || exit 1
            fi
        done
    fi
}

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 {} \;