scripts: add standard input to checkpatch

It is now possible to check a patch by providing an email
through stdin.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/scripts/checkpatches.sh b/scripts/checkpatches.sh
index 5286fe6..619ac21 100755 (executable)
--- 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' "$3"
@@ -97,7 +99,20 @@ check () { # <patch> <commit> <title>
        status=$(($status + 1))
 }
 
-if [ -z "$1" ] ; then
+if [ -n "$1" ] ; then
+       for patch in "$@" ; do
+               subject=$(sed -n 's,^Subject: ,,p' "$patch")
+               check "$patch" '' "$subject"
+       done
+elif [ ! -t 0 ] ; then # stdin
+       subject=$(while read header value ; do
+               if [ "$header" = 'Subject:' ] ; then
+                       echo $value
+                       break
+               fi
+       done)
+       check '' '' "$subject"
+else
        if [ $number -eq 0 ] ; then
                commits=$(git rev-list --reverse origin/master..)
        else
@@ -107,11 +122,6 @@ if [ -z "$1" ] ; then
                subject=$(git log --format='%s' -1 $commit)
                check '' $commit "$subject"
        done
-else
-       for patch in "$@" ; do
-               subject=$(sed -n 's,^Subject: ,,p' "$patch")
-               check "$patch" '' "$subject"
-       done
 fi
 pass=$(($total - $status))
 $quiet || printf '\n%d/%d valid patch' $pass $total