2015-01-06 16:02 GMT-07:00 Junio C Hamano <[email protected]>:
> Christoph Junghans <[email protected]> writes:
>
>> Implements a inverted match for "git log", like in the case of
>> "git grep -v", which is useful from time to time to e.g. filter
>> FIXUP message out of "git log".
>>
>> Internally, a new bol 'none_match' has been introduces as
>> revs->grep_filter.invert inverts the match line-wise, which cannot
>> work as i.e. empty line always not match the pattern given.
>>
>> Signed-off-by: Christoph Junghans <[email protected]>
>> ---
>
> The patch itself looks like a good start, except that the above
> description no longer matches the implementation.
>
> I further suspect it would be better to rename all_match to
> all_or_none and then you can lose the "these two are mutually
> incompatible" check that is placed together with a wrong existing
> comment. I also notice that you forgot to update the "git grep"
> where the original "--all-match" came from.
That was on purpose. I am not quite sure what would be the point of
"showing only matches from files that match no patterns" (option
description from your patch below).
If a file matches none of the patterns, what matches are there to show?
The only useful thing I could image is using it in conjunction with
--files-with-matches, but that is what --files-without-match is for.
>
> A partial fix-up may start like this on top of your version. By
> renaming the variable used in the existing code, the compiler will
> remind you that there are a few more places that your patch did not
> touch that does something special for --all-match, which are a good
> candidates you need to think if doing something similarly special
> for the --none-match case is necessary.
>
> Thanks.
>
> diff --git a/builtin/grep.c b/builtin/grep.c
> index 4063882..9ba4254 100644
> --- a/builtin/grep.c
> +++ b/builtin/grep.c
> @@ -727,8 +727,12 @@ int cmd_grep(int argc, const char **argv, const char
> *prefix)
> close_callback },
> OPT__QUIET(&opt.status_only,
> N_("indicate hit with exit status without
> output")),
> - OPT_BOOL(0, "all-match", &opt.all_match,
> - N_("show only matches from files that match all
> patterns")),
> + OPT_SET_INT(0, "all-match", &opt.all_or_none,
> + N_("show only matches from files that match all
> patterns"),
> + GREP_ALL_MATCH),
> + OPT_SET_INT(0, "none-match", &opt.all_or_none,
> + N_("show only matches from files that match no
> patterns"),
> + GREP_NONE_MATCH),
> { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
> N_("show parse tree for grep expression"),
> PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
> diff --git a/grep.c b/grep.c
> index f486ee5..1ff5dea 100644
> --- a/grep.c
> +++ b/grep.c
> @@ -1622,14 +1622,18 @@ static int chk_hit_marker(struct grep_expr *x)
>
> int grep_source(struct grep_opt *opt, struct grep_source *gs)
> {
> - if(opt->none_match)
> - return !grep_source_1(opt, gs, 0);
> /*
> * we do not have to do the two-pass grep when we do not check
> - * buffer-wide "all-match".
> + * buffer-wide "all-match" or "none-match".
> */
> - if (!opt->all_match)
> + switch (opt->all_or_none) {
> + case GREP_ALL_MATCH:
> return grep_source_1(opt, gs, 0);
> + case GREP_NONE_MATCH:
> + return !grep_source_1(opt, gs, 0);
> + default:
> + break;
> + }
>
> /* Otherwise the toplevel "or" terms hit a bit differently.
> * We first clear hit markers from them.
> diff --git a/grep.h b/grep.h
> index 8e50c95..2cdabf2 100644
> --- a/grep.h
> +++ b/grep.h
> @@ -101,8 +101,9 @@ struct grep_opt {
> int count;
> int word_regexp;
> int fixed;
> - int all_match;
> - int none_match;
> +#define GREP_ALL_MATCH 1
> +#define GREP_NONE_MATCH 2
> + int all_or_none;
> int debug;
> #define GREP_BINARY_DEFAULT 0
> #define GREP_BINARY_NOMATCH 1
> diff --git a/revision.c b/revision.c
> index d43779e..b955848 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -2010,9 +2010,9 @@ static int handle_revision_opt(struct rev_info *revs,
> int argc, const char **arg
> } else if (!strcmp(arg, "--perl-regexp")) {
> grep_set_pattern_type_option(GREP_PATTERN_TYPE_PCRE,
> &revs->grep_filter);
> } else if (!strcmp(arg, "--all-match")) {
> - revs->grep_filter.all_match = 1;
> + revs->grep_filter.all_or_none = GREP_ALL_MATCH;
> } else if (!strcmp(arg, "--none-match")) {
> - revs->grep_filter.none_match = 1;
> + revs->grep_filter.all_or_none = GREP_NONE_MATCH;
> } else if ((argcount = parse_long_opt("encoding", argv, &optarg))) {
> if (strcmp(optarg, "none"))
> git_log_output_encoding = xstrdup(optarg);
> @@ -2335,8 +2335,6 @@ int setup_revisions(int argc, const char **argv, struct
> rev_info *revs, struct s
> die("cannot combine --walk-reflogs with --graph");
> if (!revs->reflog_info && revs->grep_filter.use_reflog_filter)
> die("cannot use --grep-reflog without --walk-reflogs");
> - if (revs->grep_filter.all_match && revs->grep_filter.none_match)
> - die("cannot combine --all-match with --none-match");
>
> return left;
> }
>
>
>
--
Christoph Junghans
http://dev.gentoo.org/~ottxor/
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