linux-kernel - [PATCH] coccinelle: grep Options and Requires fields more precisely

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Date:   Thu, 26 Oct 2017 13:50:38 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     cocci@...teme.lip6.fr, linux-kbuild@...r.kernel.org,
        Julia Lawall <Julia.Lawall@...6.fr>
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Nicolas Palix <nicolas.palix@...g.fr>,
        linux-kernel@...r.kernel.org,
        Gilles Muller <Gilles.Muller@...6.fr>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: [PATCH] coccinelle: grep Options and Requires fields more precisely

Currently, the required version for badzero.cocci is picked up from
its "Comments:" line since it contains the word "Requires".

Surprisingly, ld-version.sh can extract the version number from the
string "Requires Coccinelle version 1.0.0-rc20 or later", but this
expectation is fragile.  Fix the .cocci file.  I removed "-rc20"
because ld-version.sh cannot handle it.

Make the coccicheck script to see exact patterns for "Options:" and
"Requires:" in order to avoid accidental matching to what just happens
to appear in comment lines.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/coccicheck                    | 4 ++--
 scripts/coccinelle/null/badzero.cocci | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/coccicheck b/scripts/coccicheck
index 3e21a1b..1bfa2d2 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -168,8 +168,8 @@ OPTIONS="$OPTIONS $SPFLAGS"
 coccinelle () {
     COCCI="$1"
 
-    OPT=`grep "Option" $COCCI | cut -d':' -f2`
-    REQ=`grep "Requires" $COCCI | cut -d':' -f2 | sed "s| ||"`
+    OPT=`grep "Options:" $COCCI | cut -d':' -f2`
+    REQ=`grep "Requires:" $COCCI | cut -d':' -f2 | sed "s| ||"`
     REQ_NUM=$(echo $REQ | ${DIR}/scripts/ld-version.sh)
     if [ "$REQ_NUM" != "0" ] ; then
 	    if [ "$SPATCH_VERSION_NUM" -lt "$REQ_NUM" ] ; then
diff --git a/scripts/coccinelle/null/badzero.cocci b/scripts/coccinelle/null/badzero.cocci
index 5551da2..f597c80 100644
--- a/scripts/coccinelle/null/badzero.cocci
+++ b/scripts/coccinelle/null/badzero.cocci
@@ -10,7 +10,7 @@
 // Copyright: (C) 2012 Julia Lawall, INRIA/LIP6.  GPLv2.
 // Copyright: (C) 2012 Gilles Muller, INRIA/LiP6.  GPLv2.
 // URL: http://coccinelle.lip6.fr/
-// Comments: Requires Coccinelle version 1.0.0-rc20 or later
+// Requires: 1.0.0
 // Options:
 
 virtual patch
-- 
2.7.4