On Thu, Sep 29, 2016 at 2:48 PM, Brandon Williams <bmwill@xxxxxxxxxx> wrote:
> Pathspecs can be a bit tricky when trying to apply them to submodules.
> The main challenge is that the pathspecs will be with respect to the
> superproject and not with respect to paths in the submodule. The
> approach this patch takes is to pass in the identical pathspec from the
> superproject to the submodule in addition to the submodule-prefix, which
> is the path from the root of the superproject to the submodule, and then
> we can compare an entry in the submodule prepended with the
> submodule-prefix to the pathspec in order to determine if there is a
> match.
>
> This patch also permits the pathspec logic to perform a prefix match against
> submodules since a pathspec could refer to a file inside of a submodule.
> Due to limitations in the wildmatch logic, a prefix match is only done
> literally. If any wildcard character is encountered we'll simply punt
> and produce a false positive match. More accurate matching will be done
> once inside the submodule. This is due to the superproject not knowing
> what files could exist in the submodule.
>
> Signed-off-by: Brandon Williams <bmwill@xxxxxxxxxx>
> ---
> Documentation/git-ls-files.txt | 3 +-
> builtin/ls-files.c | 27 +++++++--
> dir.c | 46 +++++++++++++-
> dir.h | 4 ++
> t/t3007-ls-files-recurse-submodules.sh | 108 ++++++++++++++++++++++++++++++++-
> 5 files changed, 175 insertions(+), 13 deletions(-)
>
> diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt
> index ea01d45..51ec9a1 100644
> --- a/Documentation/git-ls-files.txt
> +++ b/Documentation/git-ls-files.txt
> @@ -140,8 +140,7 @@ a space) at the start of each line:
>
> --recurse-submodules::
> Recursively calls ls-files on each submodule in the repository.
> - Currently there is only support for the --cached mode without a
> - pathspec.
> + Currently there is only support for the --cached.
s/--cached/--cached mode/ ?
The "the" in front of --cached sounds a bit strange for a non native
speaker here.
> + /*
> + * Find common prefix for all pathspec's
> + * This is used as a performance optimization which unfortunately cannot
> + * be done when recursing into submodules
> + */
> + if (recurse_submodules)
> + max_prefix = NULL;
> + else
> + max_prefix = common_prefix(&pathspec);
Nit of the day:
While this is readable, you may want to explore how this reads shorter as
max_prefix = recurse_submodules ? NULL : common_prefix(&pathspec);
?
> + git ls-files --recurse-submodules "sub" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "sub/" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "sub/file" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "su*/file" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "su?/file" >actual &&
> + test_cmp expect actual
> +'
> +
> + git ls-files --recurse-submodules "s??/file" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "s???file" >actual &&
> + test_cmp expect actual &&
> + git ls-files --recurse-submodules "s*file" >actual &&
> + test_cmp expect actual
> '
Thanks for the tests!