[PATCH v6] coccicheck: Support search for SmPL scripts within selected directory hierarchy

[zhongshiqi]

*Allow defining the environment variable âCOCCIâ as a directory to
search SmPL scripts.

*Start a corresponding file determination if it contains an acceptable
path.

*Update coccinelle.rst documents for use coccicheck with a directory
selection

Signed-off-by: zhongshiqi <zhong.shiqi@xxxxxxxxxx>
---
Changes in v6:
	update coccinelle.rst documents and add instructions for use this

Changes in v5:
	rewrite change description as an enumeration

Changes in v4:
	rewrite change description in another wording

Changes in v3:
	1:rewrite change description
	2:fix patch subject
	3:modify commit log

Changes in v2:
	1.fix patch subject according to the reply by Markus
	<Markus.Elfring@xxxxxx>
	2.change description in âimperative moodâ

 Documentation/dev-tools/coccinelle.rst | 51 ++++++++++++++++++++++------------
 scripts/coccicheck                     |  4 +++
 2 files changed, 38 insertions(+), 17 deletions(-)

diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst
index 00a3409..6af3201 100644
--- a/Documentation/dev-tools/coccinelle.rst
+++ b/Documentation/dev-tools/coccinelle.rst
@@ -100,8 +100,8 @@ Two other modes provide some common combinations of these modes.
   It should be used with the C option (described later)
   which checks the code on a file basis.
 
-Examples
-~~~~~~~~
+Using Coccinelle with defalut value
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To make a report for every semantic patch, run the following command::
 
@@ -127,6 +127,38 @@ To enable verbose messages set the V= variable, for example::
 
    make coccicheck MODE=report V=1
 
+Using Coccinelle with a single file selection
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The optional make variable COCCI can be used to check a single
+semantic patch. In that case, the variable must be initialized with
+the name of the semantic patch to apply.
+
+For instance::
+
+	make coccicheck COCCI=<my_SP.cocci> MODE=patch
+
+or::
+
+	make coccicheck COCCI=<my_SP.cocci> MODE=report
+
+
+Using Coccinelle with directory selection
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The optional make variable COCCI can be used to search SmPL scripts in a
+directory. In that case, the variable must be initialized with the name of
+a directory which contains scripts for the semantic patch language.
+
+For instance::
+
+	make coccicheck COCCI=<my_SPDIR> MODE=patch
+
+or::
+
+	make coccicheck COCCI=<my_SPDIR> MODE=report
+
+
 Coccinelle parallelization
 ---------------------------
 
@@ -148,21 +180,6 @@ When parmap is enabled, if an error occurs in Coccinelle, this error
 value is propagated back, the return value of the ``make coccicheck``
 captures this return value.
 
-Using Coccinelle with a single semantic patch
----------------------------------------------
-
-The optional make variable COCCI can be used to check a single
-semantic patch. In that case, the variable must be initialized with
-the name of the semantic patch to apply.
-
-For instance::
-
-	make coccicheck COCCI=<my_SP.cocci> MODE=patch
-
-or::
-
-	make coccicheck COCCI=<my_SP.cocci> MODE=report
-
 
 Controlling Which Files are Processed by Coccinelle
 ---------------------------------------------------
diff --git a/scripts/coccicheck b/scripts/coccicheck
index e04d328..bfe0c94 100755
--- a/scripts/coccicheck
+++ b/scripts/coccicheck
@@ -257,6 +257,10 @@ if [ "$COCCI" = "" ] ; then
     for f in `find $srctree/scripts/coccinelle/ -name '*.cocci' -type f | sort`; do
 	coccinelle $f
     done
+elif [ -d "$COCCI" ] ; then
+    for f in `find $COCCI/ -name '*.cocci' -type f | sort`; do
+       coccinelle $f
+    done
 else
     coccinelle $COCCI
 fi
-- 
2.9.5