summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--Documentation/git-grep.txt6
-rw-r--r--Makefile15
-rw-r--r--builtin/grep.c2
-rwxr-xr-xcontrib/completion/git-completion.bash1
-rw-r--r--grep.c75
-rw-r--r--grep.h9
6 files changed, 107 insertions, 1 deletions
diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index 4a5837881d..e150c77cff 100644
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -12,6 +12,7 @@ SYNOPSIS
'git grep' [-a | --text] [-I] [-i | --ignore-case] [-w | --word-regexp]
[-v | --invert-match] [-h|-H] [--full-name]
[-E | --extended-regexp] [-G | --basic-regexp]
+ [-P | --perl-regexp]
[-F | --fixed-strings] [-n | --line-number]
[-l | --files-with-matches] [-L | --files-without-match]
[(-O | --open-files-in-pager) [<pager>]]
@@ -97,6 +98,11 @@ OPTIONS
Use POSIX extended/basic regexp for patterns. Default
is to use basic regexp.
+-P::
+--perl-regexp::
+ Use Perl-compatible regexp for patterns. Requires libpcre to be
+ compiled in.
+
-F::
--fixed-strings::
Use fixed strings for patterns (don't interpret pattern
diff --git a/Makefile b/Makefile
index cbc3fce2d5..fea55c04dd 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,12 @@ all::
# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# This also implies BLK_SHA1.
#
+# Define USE_LIBPCRE if you have and want to use libpcre. git-grep will be
+# able to use Perl-compatible regular expressions.
+#
+# Define LIBPCREDIR=/foo/bar if your libpcre header and library files are in
+# /foo/bar/include and /foo/bar/lib directories.
+#
# Define NO_CURL if you do not have libcurl installed. git-http-pull and
# git-http-push are not built, and you cannot use http:// and https://
# transports.
@@ -1248,6 +1254,15 @@ ifdef NO_LIBGEN_H
COMPAT_OBJS += compat/basename.o
endif
+ifdef USE_LIBPCRE
+ BASIC_CFLAGS += -DUSE_LIBPCRE
+ ifdef LIBPCREDIR
+ BASIC_CFLAGS += -I$(LIBPCREDIR)/include
+ EXTLIBS += -L$(LIBPCREDIR)/$(lib) $(CC_LD_DYNPATH)$(LIBPCREDIR)/$(lib)
+ endif
+ EXTLIBS += -lpcre
+endif
+
ifdef NO_CURL
BASIC_CFLAGS += -DNO_CURL
REMOTE_CURL_PRIMARY =
diff --git a/builtin/grep.c b/builtin/grep.c
index 10a1f65310..6831975104 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -781,6 +781,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
REG_EXTENDED),
OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
"interpret patterns as fixed strings"),
+ OPT_BOOLEAN('P', "perl-regexp", &opt.pcre,
+ "use Perl-compatible regular expressions"),
OPT_GROUP(""),
OPT_BOOLEAN('n', "line-number", &opt.linenum, "show line numbers"),
OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 3dc9cbe9f9..2facd08d16 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1487,6 +1487,7 @@ _git_grep ()
--text --ignore-case --word-regexp --invert-match
--full-name --line-number
--extended-regexp --basic-regexp --fixed-strings
+ --perl-regexp
--files-with-matches --name-only
--files-without-match
--max-depth
diff --git a/grep.c b/grep.c
index 870d10cf69..d03d9e24c2 100644
--- a/grep.c
+++ b/grep.c
@@ -74,6 +74,69 @@ static NORETURN void compile_regexp_failed(const struct grep_pat *p,
die("%s'%s': %s", where, p->pattern, error);
}
+#ifdef USE_LIBPCRE
+static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
+{
+ const char *error;
+ int erroffset;
+ int options = 0;
+
+ if (opt->ignore_case)
+ options |= PCRE_CASELESS;
+
+ p->pcre_regexp = pcre_compile(p->pattern, options, &error, &erroffset,
+ NULL);
+ if (!p->pcre_regexp)
+ compile_regexp_failed(p, error);
+
+ p->pcre_extra_info = pcre_study(p->pcre_regexp, 0, &error);
+ if (!p->pcre_extra_info && error)
+ die("%s", error);
+}
+
+static int pcrematch(struct grep_pat *p, const char *line, const char *eol,
+ regmatch_t *match, int eflags)
+{
+ int ovector[30], ret, flags = 0;
+
+ if (eflags & REG_NOTBOL)
+ flags |= PCRE_NOTBOL;
+
+ ret = pcre_exec(p->pcre_regexp, p->pcre_extra_info, line, eol - line,
+ 0, flags, ovector, ARRAY_SIZE(ovector));
+ if (ret < 0 && ret != PCRE_ERROR_NOMATCH)
+ die("pcre_exec failed with error code %d", ret);
+ if (ret > 0) {
+ ret = 0;
+ match->rm_so = ovector[0];
+ match->rm_eo = ovector[1];
+ }
+
+ return ret;
+}
+
+static void free_pcre_regexp(struct grep_pat *p)
+{
+ pcre_free(p->pcre_regexp);
+ pcre_free(p->pcre_extra_info);
+}
+#else /* !USE_LIBPCRE */
+static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
+{
+ die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
+}
+
+static int pcrematch(struct grep_pat *p, const char *line, const char *eol,
+ regmatch_t *match, int eflags)
+{
+ return 1;
+}
+
+static void free_pcre_regexp(struct grep_pat *p)
+{
+}
+#endif /* !USE_LIBPCRE */
+
static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
{
int err;
@@ -85,6 +148,11 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
if (p->fixed)
return;
+ if (opt->pcre) {
+ compile_pcre_regexp(p, opt);
+ return;
+ }
+
err = regcomp(&p->regexp, p->pattern, opt->regflags);
if (err) {
char errbuf[1024];
@@ -327,7 +395,10 @@ void free_grep_patterns(struct grep_opt *opt)
case GREP_PATTERN: /* atom */
case GREP_PATTERN_HEAD:
case GREP_PATTERN_BODY:
- regfree(&p->regexp);
+ if (p->pcre_regexp)
+ free_pcre_regexp(p);
+ else
+ regfree(&p->regexp);
break;
default:
break;
@@ -426,6 +497,8 @@ static int patmatch(struct grep_pat *p, char *line, char *eol,
if (p->fixed)
hit = !fixmatch(p, line, eol, match);
+ else if (p->pcre_regexp)
+ hit = !pcrematch(p, line, eol, match, eflags);
else
hit = !regmatch(&p->regexp, line, eol, match, eflags);
diff --git a/grep.h b/grep.h
index 06621fe663..cd055cdfa8 100644
--- a/grep.h
+++ b/grep.h
@@ -1,6 +1,12 @@
#ifndef GREP_H
#define GREP_H
#include "color.h"
+#ifdef USE_LIBPCRE
+#include <pcre.h>
+#else
+typedef int pcre;
+typedef int pcre_extra;
+#endif
enum grep_pat_token {
GREP_PATTERN,
@@ -33,6 +39,8 @@ struct grep_pat {
size_t patternlen;
enum grep_header_field field;
regex_t regexp;
+ pcre *pcre_regexp;
+ pcre_extra *pcre_extra_info;
unsigned fixed:1;
unsigned ignore_case:1;
unsigned word_regexp:1;
@@ -83,6 +91,7 @@ struct grep_opt {
#define GREP_BINARY_TEXT 2
int binary;
int extended;
+ int pcre;
int relative;
int pathname;
int null_following_name;