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Add some warnings about -P to help users use it properly 

Signed-off-by: David A. Wheeler <dwheeler@dwheeler.com>
This commit is contained in:
David A. Wheeler 2017-08-26 15:52:04 -04:00
parent 608bc45b6d
commit b2556b7348
1 changed files with 11 additions and 1 deletions
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flawfinder.1
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@ -387,7 +387,7 @@ this behavior is now the default.
.TP
\fB\-P\fR \fIpatchfile\fR
Examine the selected files or directories, but only report hits in lines
that are added or modified by the given patch file.
that are added or modified as described in the given patch file.
The patch file must be in a recognized unified diff format
(e.g., the output of GNU "diff -u old new", "svn diff", or "git diff [commit]").
Flawfinder assumes that the patch has already been applied to the files.
@ -406,6 +406,16 @@ if you have a different format, again regenerate it first.
Only hits that occur on resultant changed lines, or immediately
above and below them, are reported.
This option implies \-\-neverignore.
\fBWarning\fR: Do \fInot\fR pass a patch file without the
\fB\-P\fR, because flawfinder will then try to treat the file as a
source file.
This will often work, but the line numbers will be relative
to the beginning of the patch file, not the positions in the
source code.
Note that you \fBmust\fR also provide the actual files to analyze,
and not just the patch file; when using \f\-P\fR files are only reported
if they are both listed in the patch and also listed (directly or indirectly)
in the list of files to analyze.
.SS "Selecting Hits to Display"