tools/libxfs-apply - pub/scm/linux/kernel/git/djwong/xfsprogs-dev - Git at Google

 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0

 # 2 args:
 #	libxfs-apply <repo> <commit ID or patchfile>

 usage()
 {
 	echo $*
 	echo
 	echo "Usage:"
 	echo "	libxfs-apply [--verbose] --sob <name/email> --source <repodir> --commit <commit_id>"
 	echo "	libxfs-apply --patch <patchfile>"
 	echo
 	echo "libxfs-apply should be run in the destination git repository."
 	exit
 }

 cleanup()
 {
 	rm -f $PATCH
 }

 # output to stderr so it is not caught by file redirects
 fail()
 {
 	>&2 echo "Fail:"
 	>&2 echo $*
 	cleanup
 	exit
 }

 # filterdiff didn't start handling git diff metadata correctly until some time
 # after 0.3.4. The handling in 0.3.4 was buggy and broken, requiring working
 # around that bugs to use it. Now that 0.4.2 has fixed all those bugs, the
 # work-arounds for 0.3.4 do not work. Hence set 0.4.2 as the minimum required
 # version and tell the user to upgrade if an old version is detected. We need to
 # check against x.y.z version numbers here.
 _version=`filterdiff --version | cut -d " " -f 5`
 _major=`echo $_version | cut -d "." -f 1`
 _minor=`echo $_version | cut -d "." -f 2`
 _patch=`echo $_version | cut -d "." -f 3`
 if [ $_major -eq 0 ]; then
 	if [ $_minor -lt 4 ]; then
 		fail "filterdiff $_version found. 0.4.2 or greater is required."
 	fi
 	if [ $_minor -eq 4 -a $_patch -lt 2 ]; then
 		fail "filterdiff $_version found. 0.4.2 or greater is required."
 	fi
 fi

 # We should see repository contents we recognise, both at the source and
 # destination. Kernel repositorys will have fs/xfs/libxfs, and xfsprogs
 # repositories will have libxcmd.
 SOURCE="kernel"
 check_repo()
 {
 	if [ ! -d "fs/xfs/libxfs" -a ! -d "libxcmd" ]; then
 		usage "$1 repository contents not recognised!"
 	fi
 	if [ -d "$REPO/libxcmd" ]; then
 		SOURCE="xfsprogs"
 	fi
 }

 REPO=
 PATCH=
 COMMIT_ID=
 VERBOSE=
 GUILT=0
 STGIT=0

 while [ $# -gt 0 ]; do
 	case "$1" in
 	--source)	REPO=$2 ; shift ;;
 	--patch)	PATCH=$2; shift ;;
 	--commit)	COMMIT_ID=$2 ; shift ;;
 	--sob)		SIGNED_OFF_BY=$2 ; shift ;;
 	--verbose)	VERBOSE=true ;;
 	*)		usage ;;
 	esac
 	shift
 done

 if [ -n "$PATCH" ]; then
 	if [ -n "$REPO" -o -n "$COMMIT_ID" ]; then
 		usage "Need to specify either patch or source repo/commit"
 	fi
 	VERBOSE=true
 elif [ -z "$REPO" -o -z "$COMMIT_ID" ]; then
 	usage "Need to specify both source repo and commit id"
 fi

 check_repo Destination

 # Are we using guilt? This works even if no patch is applied.
 guilt top &> /dev/null
 if [ $? -eq 0 ]; then
 	GUILT=1
 fi

 # Are we using stgit? This works even if no patch is applied.
 stg top &> /dev/null
 if [ $? -eq 0 ]; then
 	STGIT=1
 fi

 #this is pulled from the guilt code to handle commit ids sanely.
 # usage: munge_hash_range <hash range>
 #
 # this means:
 #	<hash>			- one commit
 #	<hash>..		- hash until head (excludes hash, includes head)
 #	..<hash>		- until hash (includes hash)
 #	<hash1>..<hash2>	- from hash to hash (inclusive)
 #
 # The output of this function is suitable to be passed to "git rev-list"
 munge_hash_range()
 {
 	case "$1" in
 		*..*..*|*\ *)
 			# double .. or space is illegal
 			return 1;;
 		..*)
 			# e.g., "..v0.10"
 			echo ${1#..};;
 		*..)
 			# e.g., "v0.19.."
 			echo ${1%..}..HEAD;;
 		*..*)
 			# e.g., "v0.19-rc1..v0.19"
 			echo ${1%%..*}..${1#*..};;
 		?*)
 			# e.g., "v0.19"
 			echo $1^..$1;;
 		*)  # empty
 			return 1;;
 	esac
 	return 0
 }

 # Filter the patch into the right format & files for the other tree
 filter_kernel_patch()
 {
 	local _patch=$1
 	local _libxfs_files=""

 	# The files we will try to apply to
 	_libxfs_files=`mktemp`
 	ls -1 fs/xfs/libxfs/*.[ch] | sed -e "s%.*/\(.*\)%*\1%" > $_libxfs_files

 	# Create the new patch
 	# filterdiff will have screwed up files that source/sink /dev/null.
 	# fix that up with some sed magic.
 	filterdiff \
 			--verbose \
 			-I $_libxfs_files \
 			--strip=1 \
 			--addoldprefix=a/fs/xfs/ \
 			--addnewprefix=b/fs/xfs/ \
 			$_patch | \
 		sed -e 's, [ab]\/fs\/xfs\/\(\/dev\/null\), \1,'


 	rm -f $_libxfs_files
 }

 filter_xfsprogs_patch()
 {
 	local _patch=$1
 	local _libxfs_files=""

 	# The files we will try to apply to. We need to pull this from the
 	# patch, as the may be libxfs files added in this patch and so we
 	# need to capture them.
 	_libxfs_files=`mktemp`
 	#ls -1 libxfs/*.[ch] | sed -e "s%.*/\(.*\)%*libxfs/\1%" > $_libxfs_files
 	lsdiff $_patch | sed -e "s%.*/\(.*\)%*libxfs/\1%" > $_libxfs_files

 	# Create the new patch
 	# filterdiff will have screwed up files that source/sink /dev/null.
 	# fix that up with some sed magic.
 	filterdiff \
 			--verbose \
 			-I $_libxfs_files \
 			--strip=3 \
 			--addoldprefix=a/ \
 			--addnewprefix=b/ \
 			$_patch | \
 		sed -e 's, [ab]\/\(\/dev\/null\), \1,'

 	rm -f $_libxfs_files
 }

 add_header()
 {
 	local hdr="$1"
 	local hdrfile="$2"

 	tail -n 1 "$hdrfile" | grep -q "^${hdr}$" || echo "$hdr" >> "$hdrfile"
 }

 fixup_header_format()
 {
 	local _source=$1
 	local _patch=$2
 	local _hdr=`mktemp`
 	local _diff=`mktemp`
 	local _new_hdr=$_hdr.new

 	# Split the header on the first ^diff --git line (convenient!)
 	sed -e /^diff/q $_patch > $_hdr
 	cat $_patch | awk '
 		BEGIN { diff_seen = 0; index_seen = 0 }
 		/^diff/ { diff_seen++; next }
 		/^index/ { if (++index_seen == 1) { next } }
 		// { if (diff_seen) { print $0 } }' > $_diff

 	# the header now has the format:
 	# commit 0d5a75e9e23ee39cd0d8a167393dcedb4f0f47b2
 	# Author: Eric Sandeen <sandeen@sandeen.net>
 	# Date:   Wed Jun 1 17:38:15 2016 +1000
 	#
 	#     xfs: make several functions static
 	#....
 	#     Signed-off-by: Dave Chinner <david@fromorbit.com>
 	#
 	# We want to format it like a normal patch with a line to say what repo
 	# and commit it was sourced from:
 	#
 	# xfs: make several functions static
 	#
 	# From: Eric Sandeen <sandeen@sandeen.net>
 	#
 	# Source kernel commit: 0d5a75e9e23ee39cd0d8a167393dcedb4f0f47b2
 	#
 	# <body>
 	#
 	# To do this, use sed to first strip whitespace, then pass it into awk
 	# to rearrange the headers.
 	sed -e 's/^ *//' $_hdr | awk -v src=$_source '
 		BEGIN {
 			date_seen=0
 			subject_seen=0
 		}
 		/^commit/ {
 			commit=$2
 			next;
 		}
 		/^Author:/ {
 			split($0, a, ":")
 			from=a[2]
 			next;
 		}
 		/^Date:/ { date_seen=1; next }
 		/^difflib/ { next }

 		// {
 			if (date_seen == 0)
 				next;
 			if (subject_seen == 0) {
 				if (length($0) != 0) {
 					subject_seen=1
 					subject=$0;
 				}
 				next;
 			}
 			if (subject_seen == 1) {
 				print subject
 				print
 				print "From:" from
 				print
 				print "Source " src " commit: " commit
 				subject_seen=2
 			}
 			print $0
 		}' > $_hdr.new

 	# Remove the last line if it contains only whitespace
 	sed -i '${/^[[:space:]]*$/d;}' $_hdr.new

 	# Add Signed-off-by: header if specified
 	if [ ! -z ${SIGNED_OFF_BY+x} ]; then
 		add_header "Signed-off-by: $SIGNED_OFF_BY" $_hdr.new
 	else	# get it from git config if present
 		SOB_NAME=`git config --get user.name`
 		SOB_EMAIL=`git config --get user.email`
 		if [ ! -z ${SOB_NAME+x} ]; then
 			add_header "Signed-off-by: $SOB_NAME <$SOB_EMAIL>" $_hdr.new
 		fi
 	fi

 	# now output the new patch
 	cat $_hdr.new $_diff

 	rm -f $_hdr* $_diff

 }

 apply_patch()
 {
 	local _patch=$1
 	local _patch_name=$2
 	local _current_commit=$3
 	local _new_patch=`mktemp`
 	local _source="kernel"
 	local _target="xfsprogs"

 	# filter just the libxfs parts of the patch
 	if [ $SOURCE == "xfsprogs" ]; then

 		[ -n "$VERBOSE" ] || lsdiff $_patch | grep -q "[ab]/libxfs/"
 		if [ $? -ne 0 ]; then
 			echo "Doesn't look like an xfsprogs patch with libxfs changes"
 			echo "Skipping commit $_current_commit"
 			return
 		fi

 		filter_kernel_patch $_patch > $_new_patch
 		_source="xfsprogs"
 		_target="kernel"
 	elif [ $SOURCE == "kernel" ]; then

 		[ -n "$VERBOSE" ] || lsdiff $_patch | grep -q "[ab]/fs/xfs/libxfs/"
 		if [ $? -ne 0 ]; then
 			echo "Doesn't look like a kernel patch with libxfs changes"
 			echo "Skipping commit $_current_commit"
 			return
 		fi

 		filter_xfsprogs_patch $_patch > $_new_patch
 	else
 		fail "Unknown source repo type: $SOURCE"
 	fi

 	grep -q "Source $_target commit: " $_patch
 	if [ "$?" -eq "0" ]; then
 		echo "$_patch_name already synced up"
 		echo "$_skipping commit $_current_commit"
 		return
 	fi

 	# now munge the header to be in the correct format.
 	fixup_header_format $_source $_new_patch > $_new_patch.2

 	if [ -n "$VERBOSE" ]; then
 		echo "Filtered patch from $REPO contains:"
 		lsdiff $_new_patch.2
 	fi

 	# Ok, now apply with guilt or patch; either may fail and require a force
 	# and/or a manual reject fixup
 	if [ $GUILT -eq 1 ]; then
 		[ -n "$VERBOSE" ] || echo "$REPO looks like a guilt directory."
 		PATCHES=`guilt applied | wc -l`
 		if [ -n "$VERBOSE" -a $PATCHES -gt 0 ]; then
 			echo -n "Top patch is: "
 			guilt top
 		fi

 		guilt import -P $_patch_name $_new_patch.2
 		guilt push
 		if [ $? -eq 0 ]; then
 			guilt refresh
 		else
 			echo "Guilt push of $_current_commit $_patch_name failed!"
 			read -r -p "Skip or Fail [s|F]? " response
 			if [ -z "$response" -o "$response" != "s" ]; then
 				echo "Force push patch, fix and refresh."
 				echo "Restart from commit $_current_commit"
 				fail "Manual cleanup required!"
 			else
 				echo "Skipping."
 				guilt delete -f $_patch_name
 			fi
 		fi
 	elif [ $STGIT -eq 1 ]; then
 		[ -n "$VERBOSE" ] || echo "$REPO looks like a stgit directory."
 		PATCHES=`stg series | wc -l`
 		if [ -n "$VERBOSE" -a $PATCHES -gt 0 ]; then
 			echo -n "Top patch is: "
 			stg top
 		fi

 		stg import -n $_patch_name $_new_patch.2
 		if [ $? -ne 0 ]; then
 			echo "stgit push failed!"
 			read -r -p "Skip or Fail [s|F]? " response
 			if [ -z "$response" -o "$response" != "s" ]; then
 				echo "Force push patch, fix and refresh."
 				echo "Restart from commit $_current_commit"
 				fail "Manual cleanup required!"
 			else
 				echo "Skipping. Manual series file cleanup needed!"
 			fi
 		fi
 	else
 		echo "Applying with git am:"
 		git am -s $_new_patch.2
 		echo "Patch was applied in $REPO; check for rejects, etc"
 	fi

 	rm -f $_new_patch*
 }

 # name a guilt patch. Code is lifted from guilt import-commit.
 name_patch()
 {
 	s=`git log --no-decorate --pretty=oneline -1 $1 | cut -c 42-`

 	# Try to convert the first line of the commit message to a
 	# valid patch name.
 	fname=`printf %s "$s" |  \
 			sed -e "s/&/and/g" -e "s/[ :]/_/g" -e "s,[/\\],-,g" \
 			    -e "s/['\\[{}]//g" -e 's/]//g' -e 's/\*/-/g' \
 			    -e 's/\?/-/g' -e 's/\.\.\.*/./g' -e 's/^\.//' \
 			    -e 's/\.patch$//' -e 's/\.$//' | tr A-Z a-z`

 	# Try harder to make it a legal commit name by
 	# removing all but a few safe characters.
 	fname=`echo $fname|tr -d -c _a-zA-Z0-9---/\\n`

 	echo $fname
 }

 # single patch is easy.
 if [ -z "$COMMIT_ID" ]; then
 	apply_patch $PATCH
 	cleanup
 	exit 0
 fi

 # switch to source repo and get individual commit IDs
 #
 # git rev-list gives us a list in reverse chronological order, so we need to
 # reverse that to give us the order we require.
 pushd $REPO > /dev/null
 check_repo Source
 hashr=`munge_hash_range $COMMIT_ID`
 if [ $SOURCE == "kernel" ]; then
 	hashr="$hashr -- fs/xfs/libxfs"
 else
 	hashr="$hashr -- libxfs"
 fi

 # grab and echo the list of commits for confirmation
 echo "Commits to apply:"
 commit_list=`git rev-list $hashr | tac`
 git log --oneline $hashr |tac
 read -r -p "Proceed [y|N]? " response
 if [ -z "$response" -o "$response" != "y" ]; then
 	fail "Aborted!"
 fi
 popd > /dev/null

 PATCH=`mktemp`
 for commit in $commit_list; do

 	# switch to source repo and pull commit into a patch file
 	pushd $REPO > /dev/null
 	git show $commit > $PATCH || usage "Bad source commit ID!"
 	patch_name=`name_patch $commit`
 	popd > /dev/null

 	apply_patch $PATCH $patch_name $commit
 done


 cleanup
	#!/bin/bash
	# SPDX-License-Identifier: GPL-2.0

	# 2 args:
	# libxfs-apply <repo> <commit ID or patchfile>

	usage()
	{
	echo $*
	echo
	echo "Usage:"
	echo " libxfs-apply [--verbose] --sob <name/email> --source <repodir> --commit <commit_id>"
	echo " libxfs-apply --patch <patchfile>"
	echo
	echo "libxfs-apply should be run in the destination git repository."
	exit
	}

	cleanup()
	{
	rm -f $PATCH
	}

	# output to stderr so it is not caught by file redirects
	fail()
	{
	>&2 echo "Fail:"
	>&2 echo $*
	cleanup
	exit
	}

	# filterdiff didn't start handling git diff metadata correctly until some time
	# after 0.3.4. The handling in 0.3.4 was buggy and broken, requiring working
	# around that bugs to use it. Now that 0.4.2 has fixed all those bugs, the
	# work-arounds for 0.3.4 do not work. Hence set 0.4.2 as the minimum required
	# version and tell the user to upgrade if an old version is detected. We need to
	# check against x.y.z version numbers here.
	_version=`filterdiff --version \| cut -d " " -f 5`
	_major=`echo $_version \| cut -d "." -f 1`
	_minor=`echo $_version \| cut -d "." -f 2`
	_patch=`echo $_version \| cut -d "." -f 3`
	if [ $_major -eq 0 ]; then
	if [ $_minor -lt 4 ]; then
	fail "filterdiff $_version found. 0.4.2 or greater is required."
	fi
	if [ $_minor -eq 4 -a $_patch -lt 2 ]; then
	fail "filterdiff $_version found. 0.4.2 or greater is required."
	fi
	fi

	# We should see repository contents we recognise, both at the source and
	# destination. Kernel repositorys will have fs/xfs/libxfs, and xfsprogs
	# repositories will have libxcmd.
	SOURCE="kernel"
	check_repo()
	{
	if [ ! -d "fs/xfs/libxfs" -a ! -d "libxcmd" ]; then
	usage "$1 repository contents not recognised!"
	fi
	if [ -d "$REPO/libxcmd" ]; then
	SOURCE="xfsprogs"
	fi
	}

	REPO=
	PATCH=
	COMMIT_ID=
	VERBOSE=
	GUILT=0
	STGIT=0

	while [ $# -gt 0 ]; do
	case "$1" in
	--source) REPO=$2 ; shift ;;
	--patch) PATCH=$2; shift ;;
	--commit) COMMIT_ID=$2 ; shift ;;
	--sob) SIGNED_OFF_BY=$2 ; shift ;;
	--verbose) VERBOSE=true ;;
	*) usage ;;
	esac
	shift
	done

	if [ -n "$PATCH" ]; then
	if [ -n "$REPO" -o -n "$COMMIT_ID" ]; then
	usage "Need to specify either patch or source repo/commit"
	fi
	VERBOSE=true
	elif [ -z "$REPO" -o -z "$COMMIT_ID" ]; then
	usage "Need to specify both source repo and commit id"
	fi

	check_repo Destination

	# Are we using guilt? This works even if no patch is applied.
	guilt top &> /dev/null
	if [ $? -eq 0 ]; then
	GUILT=1
	fi

	# Are we using stgit? This works even if no patch is applied.
	stg top &> /dev/null
	if [ $? -eq 0 ]; then
	STGIT=1
	fi

	#this is pulled from the guilt code to handle commit ids sanely.
	# usage: munge_hash_range <hash range>
	#
	# this means:
	# <hash> - one commit
	# <hash>.. - hash until head (excludes hash, includes head)
	# ..<hash> - until hash (includes hash)
	# <hash1>..<hash2> - from hash to hash (inclusive)
	#
	# The output of this function is suitable to be passed to "git rev-list"
	munge_hash_range()
	{
	case "$1" in
	....\|\ *)
	# double .. or space is illegal
	return 1;;
	..*)
	# e.g., "..v0.10"
	echo ${1#..};;
	*..)
	# e.g., "v0.19.."
	echo ${1%..}..HEAD;;
	..)
	# e.g., "v0.19-rc1..v0.19"
	echo ${1%%..}..${1#..};;
	?*)
	# e.g., "v0.19"
	echo $1^..$1;;
	*) # empty
	return 1;;
	esac
	return 0
	}

	# Filter the patch into the right format & files for the other tree
	filter_kernel_patch()
	{
	local _patch=$1
	local _libxfs_files=""

	# The files we will try to apply to
	_libxfs_files=`mktemp`
	ls -1 fs/xfs/libxfs/.[ch] \| sed -e "s%./\(.\)%\1%" > $_libxfs_files

	# Create the new patch
	# filterdiff will have screwed up files that source/sink /dev/null.
	# fix that up with some sed magic.
	filterdiff \
	--verbose \
	-I $_libxfs_files \
	--strip=1 \
	--addoldprefix=a/fs/xfs/ \
	--addnewprefix=b/fs/xfs/ \
	$_patch \| \
	sed -e 's, [ab]\/fs\/xfs\/\(\/dev\/null\), \1,'


	rm -f $_libxfs_files
	}

	filter_xfsprogs_patch()
	{
	local _patch=$1
	local _libxfs_files=""

	# The files we will try to apply to. We need to pull this from the
	# patch, as the may be libxfs files added in this patch and so we
	# need to capture them.
	_libxfs_files=`mktemp`
	#ls -1 libxfs/.[ch] \| sed -e "s%./\(.\)%libxfs/\1%" > $_libxfs_files
	lsdiff $_patch \| sed -e "s%./\(.\)%*libxfs/\1%" > $_libxfs_files

	# Create the new patch
	# filterdiff will have screwed up files that source/sink /dev/null.
	# fix that up with some sed magic.
	filterdiff \
	--verbose \
	-I $_libxfs_files \
	--strip=3 \
	--addoldprefix=a/ \
	--addnewprefix=b/ \
	$_patch \| \
	sed -e 's, [ab]\/\(\/dev\/null\), \1,'

	rm -f $_libxfs_files
	}

	add_header()
	{
	local hdr="$1"
	local hdrfile="$2"

	tail -n 1 "$hdrfile" \| grep -q "^${hdr}$" \|\| echo "$hdr" >> "$hdrfile"
	}

	fixup_header_format()
	{
	local _source=$1
	local _patch=$2
	local _hdr=`mktemp`
	local _diff=`mktemp`
	local _new_hdr=$_hdr.new

	# Split the header on the first ^diff --git line (convenient!)
	sed -e /^diff/q $_patch > $_hdr
	cat $_patch \| awk '
	BEGIN { diff_seen = 0; index_seen = 0 }
	/^diff/ { diff_seen++; next }
	/^index/ { if (++index_seen == 1) { next } }
	// { if (diff_seen) { print $0 } }' > $_diff

	# the header now has the format:
	# commit 0d5a75e9e23ee39cd0d8a167393dcedb4f0f47b2
	# Author: Eric Sandeen <sandeen@sandeen.net>
	# Date: Wed Jun 1 17:38:15 2016 +1000
	#
	# xfs: make several functions static
	#....
	# Signed-off-by: Dave Chinner <david@fromorbit.com>
	#
	# We want to format it like a normal patch with a line to say what repo
	# and commit it was sourced from:
	#
	# xfs: make several functions static
	#
	# From: Eric Sandeen <sandeen@sandeen.net>
	#
	# Source kernel commit: 0d5a75e9e23ee39cd0d8a167393dcedb4f0f47b2
	#
	# <body>
	#
	# To do this, use sed to first strip whitespace, then pass it into awk
	# to rearrange the headers.
	sed -e 's/^ *//' $_hdr \| awk -v src=$_source '
	BEGIN {
	date_seen=0
	subject_seen=0
	}
	/^commit/ {
	commit=$2
	next;
	}
	/^Author:/ {
	split($0, a, ":")
	from=a[2]
	next;
	}
	/^Date:/ { date_seen=1; next }
	/^difflib/ { next }

	// {
	if (date_seen == 0)
	next;
	if (subject_seen == 0) {
	if (length($0) != 0) {
	subject_seen=1
	subject=$0;
	}
	next;
	}
	if (subject_seen == 1) {
	print subject
	print
	print "From:" from
	print
	print "Source " src " commit: " commit
	subject_seen=2
	}
	print $0
	}' > $_hdr.new

	# Remove the last line if it contains only whitespace
	sed -i '${/^[[:space:]]*$/d;}' $_hdr.new

	# Add Signed-off-by: header if specified
	if [ ! -z ${SIGNED_OFF_BY+x} ]; then
	add_header "Signed-off-by: $SIGNED_OFF_BY" $_hdr.new
	else # get it from git config if present
	SOB_NAME=`git config --get user.name`
	SOB_EMAIL=`git config --get user.email`
	if [ ! -z ${SOB_NAME+x} ]; then
	add_header "Signed-off-by: $SOB_NAME <$SOB_EMAIL>" $_hdr.new
	fi
	fi

	# now output the new patch
	cat $_hdr.new $_diff

	rm -f $_hdr* $_diff

	}

	apply_patch()
	{
	local _patch=$1
	local _patch_name=$2
	local _current_commit=$3
	local _new_patch=`mktemp`
	local _source="kernel"
	local _target="xfsprogs"

	# filter just the libxfs parts of the patch
	if [ $SOURCE == "xfsprogs" ]; then

	[ -n "$VERBOSE" ] \|\| lsdiff $_patch \| grep -q "[ab]/libxfs/"
	if [ $? -ne 0 ]; then
	echo "Doesn't look like an xfsprogs patch with libxfs changes"
	echo "Skipping commit $_current_commit"
	return
	fi

	filter_kernel_patch $_patch > $_new_patch
	_source="xfsprogs"
	_target="kernel"
	elif [ $SOURCE == "kernel" ]; then

	[ -n "$VERBOSE" ] \|\| lsdiff $_patch \| grep -q "[ab]/fs/xfs/libxfs/"
	if [ $? -ne 0 ]; then
	echo "Doesn't look like a kernel patch with libxfs changes"
	echo "Skipping commit $_current_commit"
	return
	fi

	filter_xfsprogs_patch $_patch > $_new_patch
	else
	fail "Unknown source repo type: $SOURCE"
	fi

	grep -q "Source $_target commit: " $_patch
	if [ "$?" -eq "0" ]; then
	echo "$_patch_name already synced up"
	echo "$_skipping commit $_current_commit"
	return
	fi

	# now munge the header to be in the correct format.
	fixup_header_format $_source $_new_patch > $_new_patch.2

	if [ -n "$VERBOSE" ]; then
	echo "Filtered patch from $REPO contains:"
	lsdiff $_new_patch.2
	fi

	# Ok, now apply with guilt or patch; either may fail and require a force
	# and/or a manual reject fixup
	if [ $GUILT -eq 1 ]; then
	[ -n "$VERBOSE" ] \|\| echo "$REPO looks like a guilt directory."
	PATCHES=`guilt applied \| wc -l`
	if [ -n "$VERBOSE" -a $PATCHES -gt 0 ]; then
	echo -n "Top patch is: "
	guilt top
	fi

	guilt import -P $_patch_name $_new_patch.2
	guilt push
	if [ $? -eq 0 ]; then
	guilt refresh
	else
	echo "Guilt push of $_current_commit $_patch_name failed!"
	read -r -p "Skip or Fail [s\|F]? " response
	if [ -z "$response" -o "$response" != "s" ]; then
	echo "Force push patch, fix and refresh."
	echo "Restart from commit $_current_commit"
	fail "Manual cleanup required!"
	else
	echo "Skipping."
	guilt delete -f $_patch_name
	fi
	fi
	elif [ $STGIT -eq 1 ]; then
	[ -n "$VERBOSE" ] \|\| echo "$REPO looks like a stgit directory."
	PATCHES=`stg series \| wc -l`
	if [ -n "$VERBOSE" -a $PATCHES -gt 0 ]; then
	echo -n "Top patch is: "
	stg top
	fi

	stg import -n $_patch_name $_new_patch.2
	if [ $? -ne 0 ]; then
	echo "stgit push failed!"
	read -r -p "Skip or Fail [s\|F]? " response
	if [ -z "$response" -o "$response" != "s" ]; then
	echo "Force push patch, fix and refresh."
	echo "Restart from commit $_current_commit"
	fail "Manual cleanup required!"
	else
	echo "Skipping. Manual series file cleanup needed!"
	fi
	fi
	else
	echo "Applying with git am:"
	git am -s $_new_patch.2
	echo "Patch was applied in $REPO; check for rejects, etc"
	fi

	rm -f $_new_patch*
	}

	# name a guilt patch. Code is lifted from guilt import-commit.
	name_patch()
	{
	s=`git log --no-decorate --pretty=oneline -1 $1 \| cut -c 42-`

	# Try to convert the first line of the commit message to a
	# valid patch name.
	fname=`printf %s "$s" \| \
	sed -e "s/&/and/g" -e "s/[ :]/_/g" -e "s,[/\\],-,g" \
	-e "s/['\\[{}]//g" -e 's/]//g' -e 's/\*/-/g' \
	-e 's/\?/-/g' -e 's/\.\.\.*/./g' -e 's/^\.//' \
	-e 's/\.patch$//' -e 's/\.$//' \| tr A-Z a-z`

	# Try harder to make it a legal commit name by
	# removing all but a few safe characters.
	fname=`echo $fname\|tr -d -c _a-zA-Z0-9---/\\n`

	echo $fname
	}

	# single patch is easy.
	if [ -z "$COMMIT_ID" ]; then
	apply_patch $PATCH
	cleanup
	exit 0
	fi

	# switch to source repo and get individual commit IDs
	#
	# git rev-list gives us a list in reverse chronological order, so we need to
	# reverse that to give us the order we require.
	pushd $REPO > /dev/null
	check_repo Source
	hashr=`munge_hash_range $COMMIT_ID`
	if [ $SOURCE == "kernel" ]; then
	hashr="$hashr -- fs/xfs/libxfs"
	else
	hashr="$hashr -- libxfs"
	fi

	# grab and echo the list of commits for confirmation
	echo "Commits to apply:"
	commit_list=`git rev-list $hashr \| tac`
	git log --oneline $hashr \|tac
	read -r -p "Proceed [y\|N]? " response
	if [ -z "$response" -o "$response" != "y" ]; then
	fail "Aborted!"
	fi
	popd > /dev/null

	PATCH=`mktemp`
	for commit in $commit_list; do

	# switch to source repo and pull commit into a patch file
	pushd $REPO > /dev/null
	git show $commit > $PATCH \|\| usage "Bad source commit ID!"
	patch_name=`name_patch $commit`
	popd > /dev/null

	apply_patch $PATCH $patch_name $commit
	done


	cleanup