Imported Upstream version 16.11

[deb_dpdk.git] / scripts / git-log-fixes.sh

diff --git a/scripts/git-log-fixes.sh b/scripts/git-log-fixes.sh
new file mode 100755 (executable)
index 0000000..4824c7f
--- /dev/null
+++ b/scripts/git-log-fixes.sh
@@ -0,0 +1,120 @@
+#! /bin/sh -e
+
+# BSD LICENSE
+#
+# Copyright 2016 6WIND S.A.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+#   * Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in
+#     the documentation and/or other materials provided with the
+#     distribution.
+#   * Neither the name of 6WIND S.A. nor the names of its
+#     contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+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>
+{
+       tag=$(git tag -l --contains $1 | head -n1)
+       if [ -z "$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
+}
+
+git log --oneline --reverse $range |
+while read id headline ; do
+       origins=$(origin_filter $id)
+       [ -n "$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)\n' $version $id "$headline" "$origver"
+done