Stefan Beller <sbeller@xxxxxxxxxx> writes:
> This is a regression introduced by 74703a1e4d (submodule: rewrite
> `module_list` shell function in C, 2015-09-02).
>
> Add a test to ensure we list the right submodule when giving a specific
> path spec.
>
> Reported-By: Caleb Jorden <cjorden@xxxxxxxxx>
> Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
> ---
>
> I developed this on top of current origin/master, though I can backport it
> to 2.7 as well if desired.
>
> I do not remember the cause why we started to ignore a common prefix.
The code you are removing with this patch is probably an
optimization you copied from builtin/ls-files.c. When the
optimization is used, the original also limits the list of paths to
those that match the prefix by calling prune_cache(), but perhaps
you didn't have a corresponding code in your copy?
>
> Thanks,
> Stefan
>
> builtin/submodule--helper.c | 10 ++--------
> t/t7400-submodule-basic.sh | 25 +++++++++++++++++++++++++
> 2 files changed, 27 insertions(+), 8 deletions(-)
>
> diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
> index f4c3eff..ed764c9 100644
> --- a/builtin/submodule--helper.c
> +++ b/builtin/submodule--helper.c
> @@ -22,17 +22,12 @@ static int module_list_compute(int argc, const char **argv,
> struct module_list *list)
> {
> int i, result = 0;
> - char *max_prefix, *ps_matched = NULL;
> - int max_prefix_len;
> + char *ps_matched = NULL;
> parse_pathspec(pathspec, 0,
> PATHSPEC_PREFER_FULL |
> PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
> prefix, argv);
>
> - /* Find common prefix for all pathspec's */
> - max_prefix = common_prefix(pathspec);
> - max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
> -
> if (pathspec->nr)
> ps_matched = xcalloc(pathspec->nr, 1);
>
> @@ -44,7 +39,7 @@ static int module_list_compute(int argc, const char **argv,
>
> if (!S_ISGITLINK(ce->ce_mode) ||
> !match_pathspec(pathspec, ce->name, ce_namelen(ce),
> - max_prefix_len, ps_matched, 1))
> + 0, ps_matched, 1))
> continue;
>
> ALLOC_GROW(list->entries, list->nr + 1, list->alloc);
> @@ -57,7 +52,6 @@ static int module_list_compute(int argc, const char **argv,
> */
> i++;
> }
> - free(max_prefix);
>
> if (ps_matched && report_path_error(ps_matched, pathspec, prefix))
> result = -1;
> diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
> index 540771c..be82a75 100755
> --- a/t/t7400-submodule-basic.sh
> +++ b/t/t7400-submodule-basic.sh
> @@ -999,5 +999,30 @@ test_expect_success 'submodule add clone shallow submodule' '
> )
> '
>
> +test_expect_success 'submodule helper list is not confused by common prefixes' '
> + mkdir -p dir1/b &&
> + (
> + cd dir1/b &&
> + git init &&
> + echo hi >testfile2 &&
> + git add . &&
> + git commit -m "test1"
> + ) &&
> + mkdir -p dir2/b &&
> + (
> + cd dir2/b &&
> + git init &&
> + echo hello >testfile1 &&
> + git add . &&
> + git commit -m "test2"
> + ) &&
> + git submodule add /dir1/b dir1/b &&
> + git submodule add /dir2/b dir2/b &&
> + git commit -m "first submodule commit" &&
> + git submodule--helper list dir1/b |cut -c51- >actual &&
> + echo "dir1/b" >expect &&
> + test_cmp expect actual
> +'
> +
>
> test_done
--
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