[dpdk-dev] [PATCH v2] scripts: check commit formatting

[Thomas Monjalon]

The git messages have three parts:
1/ the headline
2/ the explanations
3/ the footer tags

The headline helps to quickly browse an history or catch instantly the
purpose of a commit. Making it short with some consistent wording
allows to easily parse it or match some patterns.

The explanations must give some keys like the reason of the change.
Nothing can be automatically checked for this part, except line length.

The footer contains some tags to find the origin of a bug or who
was working on it.

This script is doing some basic checks mostly on parts 1 and 3.

Signed-off-by: Thomas Monjalon <thomas.monjalon at 6wind.com>
---
 MAINTAINERS                         |   1 +
 doc/guides/contributing/patches.rst |   8 +++
 scripts/check-git-log.sh            | 140 ++++++++++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100755 scripts/check-git-log.sh

v2:
- accept not only 12 long hash in Fixes:
- check line length
- add doc

diff --git a/MAINTAINERS b/MAINTAINERS
index f213500..1953ea2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -25,6 +25,7 @@ M: Thomas Monjalon <thomas.monjalon at 6wind.com>
 T: git://dpdk.org/dpdk
 F: MAINTAINERS
 F: scripts/check-maintainers.sh
+F: scripts/check-git-log.sh
 F: scripts/checkpatches.sh
 F: scripts/load-devel-config.sh
 F: scripts/test-build.sh
diff --git a/doc/guides/contributing/patches.rst b/doc/guides/contributing/patches.rst
index 3ebe95b..06af91d 100644
--- a/doc/guides/contributing/patches.rst
+++ b/doc/guides/contributing/patches.rst
@@ -258,6 +258,14 @@ Where:
 * ``-v``: verbose.
 * ``patchX``: path to one or more patches.
 
+Then the git logs should be checked using the ``check-git-log.sh`` script.
+
+The script usage is::
+
+   check-git-log.sh [range]
+
+Where the range is a ``git log`` option.
+
 
 .. _contrib_check_compilation:
 
diff --git a/scripts/check-git-log.sh b/scripts/check-git-log.sh
new file mode 100755
index 0000000..ce6c15e
--- /dev/null
+++ b/scripts/check-git-log.sh
@@ -0,0 +1,140 @@
+#! /bin/sh
+
+# 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.
+
+# Check commit logs (headlines and references)
+#
+# If any doubt about the formatting, please check in the most recent history:
+#	git log --format='%>|(15)%cr   %s' --reverse | grep -i <pattern>
+
+if [ "$1" = '-h' -o "$1" = '--help' ] ; then
+	cat <<- END_OF_HELP
+	usage: $(basename $0) [-h] [range]
+
+	Check commit log formatting.
+	The git range can be specified as a "git log" option,
+	e.g. -1 to check only the latest commit.
+	The default range starts from origin/master to HEAD.
+	END_OF_HELP
+	exit
+fi
+
+range=${1:-origin/master..}
+
+headlines=$(git log --format='%s' $range)
+bodylines=$(git log --format='%b' $range)
+tags=$(git log --format='%b' $range | grep -i -e 'by *:' -e 'fix.*:')
+fixes=$(git log --format='%h %s' $range | grep -i ': *fix' | cut -d' ' -f1)
+
+# check headline format (spacing, no punctuation, no code)
+bad=$(echo "$headlines" | grep \
+	-e '	' \
+	-e '^ ' \
+	-e ' $' \
+	-e '\.$' \
+	-e '[,;!?&|]' \
+	-e ':.*_' \
+	-e '^[^:]*$' \
+	-e ':[^ ]' \
+	-e ' :' \
+	| sed 's,^,\t,')
+[ -z "$bad" ] || printf "Wrong headline format:\n$bad\n"
+
+# check headline label for common typos
+bad=$(echo "$headlines" | grep \
+	-e '^example[:/]' \
+	-e '^apps/' \
+	-e '^testpmd' \
+	-e 'test-pmd' \
+	-e '^bond:' \
+	| sed 's,^,\t,')
+[ -z "$bad" ] || printf "Wrong headline label:\n$bad\n"
+
+# check headline lowercase for first words
+bad=$(echo "$headlines" | grep \
+	-e '^.*[A-Z].*:' \
+	-e ': *[A-Z]' \
+	| sed 's,^,\t,')
+[ -z "$bad" ] || printf "Wrong headline uppercase:\n$bad\n"
+
+# check headline uppercase (Rx/Tx, VF, L2, MAC, Linux, ARM...)
+bad=$(echo "$headlines" | grep \
+	-e 'rx\|tx\|RX\|TX' \
+	-e '\<[pv]f\>' \
+	-e '\<l[234]\>' \
+	-e ':.*\<dma\>' \
+	-e ':.*\<pci\>' \
+	-e ':.*\<mtu\>' \
+	-e ':.*\<mac\>' \
+	-e ':.*\<vlan\>' \
+	-e ':.*\<rss\>' \
+	-e ':.*\<freebsd\>' \
+	-e ':.*\<linux\>' \
+	-e ':.*\<tilegx\>' \
+	-e ':.*\<tile-gx\>' \
+	-e ':.*\<arm\>' \
+	-e ':.*\<armv7\>' \
+	-e ':.*\<armv8\>' \
+	| sed 's,^,\t,')
+[ -z "$bad" ] || printf "Wrong headline lowercase:\n$bad\n"
+
+# check headline length (60 max)
+bad=$(echo "$headlines" | awk 'length>60 {print}' | sed 's,^,\t,')
+[ -z "$bad" ] || printf "Headline too long:\n$bad\n"
+
+# check body lines length (75 max)
+bad=$(echo "$bodylines" | awk 'length>75 {print}' | sed 's,^,\t,')
+[ -z "$bad" ] || printf "Line too long:\n$bad\n"
+
+# check tags spelling
+bad=$(echo "$tags" |
+	grep -v '^\(Reported\|Suggested\|Signed-off\|Acked\|Reviewed\|Tested\)-by: [^,]* <.*@.*>$' |
+	grep -v '^Fixes: [0-9a-f]\{7\}[0-9a-f]* (".*")$' |
+	sed 's,^.,\t&,')
+[ -z "$bad" ] || printf "Wrong tag:\n$bad\n"
+
+# check missing Fixes: tag
+bad=$(for fix in $fixes ; do
+	git log --format='%b' -1 $fix | grep -q '^Fixes: ' ||
+		git log --format='\t%s' -1 $fix
+done)
+[ -z "$bad" ] || printf "Missing 'Fixes' tag:\n$bad\n"
+
+# check Fixes: reference
+IFS='
+'
+fixtags=$(echo "$tags" | grep '^Fixes: ')
+bad=$(for fixtag in $fixtags ; do
+	hash=$(echo "$fixtag" | sed 's,^Fixes: \([0-9a-f]*\).*,\1,')
+	good="Fixes: $hash "$(git log --format='("%s")' -1 $hash 2>&-)
+	printf "$fixtag" | grep -v "^$good$"
+done | sed 's,^,\t,')
+[ -z "$bad" ] || printf "Wrong 'Fixes' reference:\n$bad\n"
-- 
2.7.0