1 files changed, 124 insertions, 0 deletions
diff --git a/src/spdk/dpdk/devtools/git-log-fixes.sh b/src/spdk/dpdk/devtools/git-log-fixes.sh
new file mode 100755
index 000000000..6d468d673
--- /dev/null
+++ b/src/spdk/dpdk/devtools/git-log-fixes.sh
@@ -0,0 +1,124 @@
+#! /bin/sh -e
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright 2016 6WIND S.A.
+
+print_usage ()
+{
+	echo "usage: $(basename $0) [-h] <git_range>"
+}
+
+print_help ()
+{
+	print_usage
+	cat <<- END_OF_HELP
+
+	Find fixes to backport on previous versions.
+	It looks for the word "fix" in the headline or a tag "Fixes" or "Reverts".
+	The oldest bug origin is printed as well as partially fixed versions.
+	END_OF_HELP
+}
+
+usage_error () # <message>
+{
+	echo "$*" >&2
+	print_usage >&2
+	exit 1
+}
+
+while getopts h ARG ; do
+	case $ARG in
+		h ) print_help ; exit 0 ;;
+		? ) print_usage >&2 ; exit 1 ;;
+	esac
+done
+shift $(($OPTIND - 1))
+[ $# -ge 1 ] || usage_error 'range argument required'
+range="$*"
+
+# get major release version of a commit
+commit_version () # <hash>
+{
+	# use current branch as history reference
+	local refbranch=$(git rev-parse --abbrev-ref HEAD)
+	local tag=$( (git tag -l --contains $1 --merged $refbranch 2>&- ||
+		# tag --merged option has been introduced in git 2.7.0
+		# below is a fallback in case of old git version
+		for t in $(git tag -l --contains $1) ; do
+			git branch $refbranch --contains $t |
+			sed "s,.\+,$t,"
+		done) |
+		head -n1)
+	if [ -z "$tag" ] ; then
+		# before -rc1 tag of release in progress
+		make showversion | cut -d'.' -f-2
+	else
+		echo $tag | sed 's,^v,,' | sed 's,-rc.*,,'
+	fi
+}
+
+# get bug origin hashes of a fix
+origin_filter () # <hash>
+{
+	git log --format='%b' -1 $1 |
+	sed -n 's,^ *\([Ff]ixes\|[Rr]everts\): *\([0-9a-f]*\).*,\2,p'
+}
+
+# get oldest major release version of bug origins
+origin_version () # <origin_hash> ...
+{
+	for origin in $* ; do
+		# check hash is valid
+		git rev-parse -q --verify $1 >&- || continue
+		# get version of this bug origin
+		local origver=$(commit_version $origin)
+		local roothashes="$(origin_filter $origin)"
+		if [ -n "$roothashes" ] ; then
+			# look chained fix of fix recursively
+			local rootver="$(origin_version $roothashes)"
+			[ -n "$rootver" ] || continue
+			echo "$rootver (partially fixed in $origver)"
+		else
+			echo "$origver"
+		fi
+	# filter the oldest origin
+	done | sort -uV | head -n1
+}
+
+# print a marker for stable tag presence
+stable_tag () # <hash>
+{
+	if git log --format='%b' -1 $1 | grep -qi '^Cc: *stable@dpdk.org' ; then
+		echo 'S'
+	else
+		echo '-'
+	fi
+}
+
+# print a marker for fixes tag presence
+fixes_tag () # <hash>
+{
+        if git log --format='%b' -1 $1 | grep -qi '^Fixes: *' ; then
+                echo 'F'
+        else
+                echo '-'
+        fi
+}
+
+git log --oneline --reverse $range |
+while read id headline ; do
+	origins=$(origin_filter $id)
+	stable=$(stable_tag $id)
+	fixes=$(fixes_tag $id)
+	[ "$stable" = "S" ] || [ "$fixes" = "F" ] || [ -n "$origins" ] || \
+		echo "$headline" | grep -q fix || continue
+	version=$(commit_version $id)
+	if [ -n "$origins" ] ; then
+		origver="$(origin_version $origins)"
+		[ -n "$origver" ] || continue
+		# ignore fix of bug introduced in the same release
+		! echo "$origver" | grep -q "^$version" || continue
+	else
+		origver='N/A'
+	fi
+	printf '%s %7s %s %s %s (%s)\n' $version $id $stable $fixes "$headline" "$origver"
+done