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| author | Junio C Hamano <gitster@pobox.com> | 2012-09-13 14:21:44 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2012-09-14 10:10:35 -0700 |
| commit | 17bf35a3c7b46df7131681bcc5bee5f12e1caec4 (patch) | |
| tree | 26c22e3e4dce563d22a840d6a9b2f144a2335b57 /builtin | |
| parent | 785ee4960c3d334cbc2b17ab74d2cebdf1b4db64 (diff) | |
| download | git-17bf35a3c7b46df7131681bcc5bee5f12e1caec4.tar.gz git-17bf35a3c7b46df7131681bcc5bee5f12e1caec4.tar.xz | |
grep: teach --debug option to dump the parse tree
Our "grep" allows complex boolean expressions to be formed to match
each individual line with operators like --and, '(', ')' and --not.
Introduce the "--debug" option to show the parse tree to help people
who want to debug and enhance it.
Also "log" learns "--grep-debug" option to do the same. The command
line parser to the log family is a lot more limited than the general
"git grep" parser, but it has special handling for header matching
(e.g. "--author"), and a parse tree is valuable when working on it.
Note that "--all-match" is *not* any individual node in the parse
tree. It is an instruction to the evaluator to check all the nodes
in the top-level backbone have matched and reject a document as
non-matching otherwise.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin')
| -rw-r--r-- | builtin/grep.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/builtin/grep.c b/builtin/grep.c index fe1726f5e..8aea00c04 100644 --- a/builtin/grep.c +++ b/builtin/grep.c @@ -772,6 +772,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix) "indicate hit with exit status without output"), OPT_BOOLEAN(0, "all-match", &opt.all_match, "show only matches from files that match all patterns"), + { OPTION_SET_INT, 0, "debug", &opt.debug, NULL, + "show parse tree for grep expression", + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 }, OPT_GROUP(""), { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager, "pager", "show matching files in the pager", |