devtools: select patches to check with git range

Rather than default to origin/master.., it can be handy to choose the
range you want to check.

Example on a branch rebased on next-net:

Before:
$ ./devtools/checkpatches.sh
...
...
67/69 valid patches

After:
$ ./devtools/checkpatches.sh -r next-net/master..

3/3 valid patches

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Thomas Monjalon <thomas@monjalon.net>

diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
index 3272774..6a01b39 100755 (executable)
--- a/devtools/checkpatches.sh
+++ b/devtools/checkpatches.sh
@@ -44,13 +44,14 @@ trap "clean_tmp_files" INT
 
 print_usage () {
        cat <<- END_OF_HELP
-       usage: $(basename $0) [-q] [-v] [-nX|patch1 [patch2] ...]]
+       usage: $(basename $0) [-q] [-v] [-nX|-r range|patch1 [patch2] ...]]
 
        Run Linux kernel checkpatch.pl with DPDK options.
        The environment variable DPDK_CHECKPATCH_PATH must be set.
 
        The patches to check can be from stdin, files specified on the command line,
-       or latest git commits limited with -n option (default limit: origin/master).
+       latest git commits limited with -n option, or commits in the git range
+       specified with -r option (default: "origin/master..").
        END_OF_HELP
 }
 
@@ -79,12 +80,14 @@ check_forbidden_additions() { # <patch>
 }
 
 number=0
+range='origin/master..'
 quiet=false
 verbose=false
-while getopts hn:qv ARG ; do
+while getopts hn:qr:v ARG ; do
        case $ARG in
                n ) number=$OPTARG ;;
                q ) quiet=true ;;
+               r ) range=$OPTARG ;;
                v ) verbose=true ;;
                h ) print_usage ; exit 0 ;;
                ? ) print_usage ; exit 1 ;;
@@ -172,7 +175,7 @@ elif [ ! -t 0 ] ; then # stdin
        check '' '' "$subject"
 else
        if [ $number -eq 0 ] ; then
-               commits=$(git rev-list --reverse origin/master..)
+               commits=$(git rev-list --reverse $range)
        else
                commits=$(git rev-list --reverse --max-count=$number HEAD)
        fi