[PATCH/RFC 4/4] grep: provide option to match line number
Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
---
Documentation/git-grep.txt | 6 +++++-
builtin/grep.c | 10 ++++++++++
2 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index d7523b3..05deb58 100644
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -21,7 +21,7 @@ SYNOPSIS
[--color[=<when>] | --no-color]
[-A <post-context>] [-B <pre-context>] [-C <context>]
[-f <file>] [-e] <pattern>
- [--and|--or|--not|(|)|-e <pattern>...]
+ [--and|--or|--not|(|)|-e <pattern>|-@ <line>...]
[--cached | --no-index | <tree>...]
[--] [<pathspec>...]
@@ -168,6 +168,10 @@ OPTIONS
scripts passing user input to grep. Multiple patterns are
combined by 'or'.
+-@::
+ The next parameter is a line number. This special pattern matches
+ this line of the input file.
+
--and::
--or::
--not::
diff --git a/builtin/grep.c b/builtin/grep.c
index 10a1f65..8b11c87 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -733,6 +733,14 @@ static int pattern_callback(const struct option *opt, const char *arg,
return 0;
}
+static int lno_pattern_callback(const struct option *opt, const char *arg,
+ int unset)
+{
+ struct grep_opt *grep_opt = opt->value;
+ append_grep_pattern(grep_opt, arg, "-@ option", 0, GREP_LNO);
+ return 0;
+}
+
static int help_callback(const struct option *opt, const char *arg, int unset)
{
return -1;
@@ -816,6 +824,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
"read patterns from file", file_callback),
{ OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
"match <pattern>", PARSE_OPT_NONEG, pattern_callback },
+ { OPTION_CALLBACK, '@', NULL, &opt, "lno",
+ "match <line>", PARSE_OPT_NONEG, lno_pattern_callback },
{ OPTION_CALLBACK, 0, "and", &opt, NULL,
"combine patterns specified with -e",
PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
--
1.7.5.349.gfeb1a
Bert Wesarg <bert.wesarg@googlemail.com>