It is now possible to check a patch by providing an email
through stdin.
It is especially useful to automate checkpatch run when
receiving an email.

Signed-off-by: Thomas Monjalon <thomas.monjalon at 6wind.com>
---
 scripts/checkpatches.sh | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatches.sh b/scripts/checkpatches.sh
index 5286fe6..0f3ed9d 100755
--- a/scripts/checkpatches.sh
+++ b/scripts/checkpatches.sh
@@ -53,7 +53,7 @@ print_usage () {
        Run Linux kernel checkpatch.pl with DPDK options.
        The environment variable DPDK_CHECKPATCH_PATH must be set.

-       The patches to check can be from files specified on the command line,
+       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).
        END_OF_HELP
 }
@@ -90,6 +90,8 @@ check () { # <patch> <commit> <title>
        elif [ -n "$2" ] ; then
                report=$(git format-patch --no-stat --stdout -1 $commit |
                        $DPDK_CHECKPATCH_PATH $options - 2>/dev/null)
+       else
+               report=$($DPDK_CHECKPATCH_PATH $options - 2>/dev/null)
        fi
        [ $? -ne 0 ] || continue
        $verbose || printf '\n### %s\n\n' "$3"
@@ -97,7 +99,15 @@ check () { # <patch> <commit> <title>
        status=$(($status + 1))
 }

-if [ -z "$1" ] ; then
+if [ ! -t 0 ] ; then # stdin
+       subject=$(while read header value ; do
+               if [ "$header" = 'Subject:' ] ; then
+                       echo $value
+                       break
+               fi
+       done)
+       check '' '' "$subject"
+elif [ -z "$1" ] ; then
        if [ $number -eq 0 ] ; then
                commits=$(git rev-list --reverse origin/master..)
        else
-- 
2.7.0

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