- The new default mode is 'report'.
- The available modes are detailed a bit more.
- Some information about the use of spatch options are
also given concerning the use of indexing tools.
Signed-off-by: Nicolas Palix <nicolas.palix@xxxxxxx>
---
v2: Fix typo reported by Sachin Kamat
Documentation/coccinelle.txt | 39 ++++++++++++++++++++++++++-------------
1 file changed, 26 insertions(+), 13 deletions(-)
diff --git a/Documentation/coccinelle.txt b/Documentation/coccinelle.txt
index 408439d..81a329f 100644
--- a/Documentation/coccinelle.txt
+++ b/Documentation/coccinelle.txt
@@ -48,7 +48,7 @@ A Coccinelle-specific target is defined in the top level
Makefile. This target is named 'coccicheck' and calls the 'coccicheck'
front-end in the 'scripts' directory.
-Four modes are defined: patch, report, context, and org. The mode to
+Four basic modes are defined: patch, report, context, and org. The mode to
use is specified by setting the MODE variable with 'MODE=<mode>'.
'patch' proposes a fix, when possible.
@@ -62,18 +62,24 @@ diff-like style.Lines of interest are indicated with '-'.
'org' generates a report in the Org mode format of Emacs.
Note that not all semantic patches implement all modes. For easy use
-of Coccinelle, the default mode is "chain" which tries the previous
-modes in the order above until one succeeds.
+of Coccinelle, the default mode is "report".
-To make a report for every semantic patch, run the following command:
+Two other modes provide some common combinations of these modes.
- make coccicheck MODE=report
+'chain' tries the previous modes in the order above until one succeeds.
-NB: The 'report' mode is the default one.
+'rep+ctxt' runs successively the report mode and the context mode.
+ It should be used with the C option (described later)
+ which checks the code on a file basis.
-To produce patches, run:
+Examples:
+ To make a report for every semantic patch, run the following command:
- make coccicheck MODE=patch
+ make coccicheck MODE=report
+
+ To produce patches, run:
+
+ make coccicheck MODE=patch
The coccicheck target applies every semantic patch available in the
@@ -129,26 +135,33 @@ To check only newly edited code, use the value 2 for the C flag, i.e.
make C=2 CHECK="scripts/coccicheck"
+In these modes, which works on a file basis, there is no information
+about semantic patches displayed, and no commit message proposed.
+
This runs every semantic patch in scripts/coccinelle by default. The
COCCI variable may additionally be used to only apply a single
semantic patch as shown in the previous section.
-The "chain" mode is the default. You can select another one with the
+The "report" mode is the default. You can select another one with the
MODE variable explained above.
-In this mode, there is no information about semantic patches
-displayed, and no commit message proposed.
-
Additional flags
~~~~~~~~~~~~~~~~~~
Additional flags can be passed to spatch through the SPFLAGS
variable.
- make SPFLAGS=--use_glimpse coccicheck
+ make SPFLAGS=--use-glimpse coccicheck
+ make SPFLAGS=--use-idutils coccicheck
See spatch --help to learn more about spatch options.
+Note that the '--use-glimpse' and '--use-idutils' options
+require external tools for indexing the code. None of them is
+thus active by default. However, by indexing the code with
+one of these tools, and according to the cocci file used,
+spatch could proceed the entire code base more quickly.
+
Proposing new semantic patches
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
1.7.9.5
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