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grep: treat revs the same for --untracked as for --no-index 

git-grep has always disallowed grepping in a tree (as
opposed to the working directory) with both --untracked
and --no-index. But we traditionally did so by first
collecting the revs, and then complaining when any were
provided.

The --no-index option recently learned to detect revs
much earlier. This has two user-visible effects:

  - we don't bother to resolve revision names at all. So
    when there's a rev/path ambiguity, we always choose to
    treat it as a path.

  - likewise, when you do specify a revision without "--",
    the error you get is "no such path" and not "--untracked
    cannot be used with revs".

The rationale for doing this with --no-index is that it is
meant to be used outside a repository, and so parsing revs
at all does not make sense.

This patch gives --untracked the same treatment. While it
_is_ meant to be used in a repository, it is explicitly
about grepping the non-repository contents. Telling the user
"we found a rev, but you are not allowed to use revs" is
not really helpful compared to "we treated your argument as
a path, and could not find it".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Jeff King 2017-02-14 16:54:36 -05:00 committed by Junio C Hamano
parent 73fc7b6b9b
commit 131f3c96d2
2 changed files with 6 additions and 6 deletions
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10
builtin/grep.c
View File

@ -967,6 +967,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
int dummy;
int use_index = 1;
int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
int allow_revs;

struct option options[] = {
OPT_BOOL(0, "cached", &cached,
@ -1165,6 +1166,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
* to it must resolve as a rev. If not, then we stop at the first
* non-rev and assume everything else is a path.
*/
allow_revs = use_index && !untracked;
for (i = 0; i < argc; i++) {
const char *arg = argv[i];
unsigned char sha1[20];
@ -1176,9 +1178,9 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
break;
}

if (!use_index) {
if (!allow_revs) {
if (seen_dashdash)
die(_("--no-index cannot be used with revs"));
die(_("--no-index or --untracked cannot be used with revs"));
break;
}

@ -1201,7 +1203,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
if (!seen_dashdash) {
int j;
for (j = i; j < argc; j++)
verify_filename(prefix, argv[j], j == i && use_index);
verify_filename(prefix, argv[j], j == i && allow_revs);
}

parse_pathspec(&pathspec, 0,
@ -1273,8 +1275,6 @@ int cmd_grep(int argc, const char **argv, const char *prefix)

if (!use_index || untracked) {
int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
if (list.nr)
die(_("--no-index or --untracked cannot be used with revs."));
hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
} else if (0 <= opt_exclude) {
die(_("--[no-]exclude-standard cannot be used for tracked contents."));

2
t/t7810-grep.sh
View File

@ -1032,7 +1032,7 @@ test_expect_success 'grep --no-index pattern -- path' '

test_expect_success 'grep --no-index complains of revs' '
test_must_fail git grep --no-index o master -- 2>err &&
test_i18ngrep "no-index cannot be used with revs" err
test_i18ngrep "cannot be used with revs" err
'

test_expect_success 'grep --no-index prefers paths to revs' '