Kevin Daudt <m...@ikke.info> writes:

> On Wed, Nov 30, 2016 at 12:31:49PM -0800, Peter Urda wrote:
>> After upgrading to version 2.11.0 I am getting a warning about empty
>> strings as pathspecs while using 'patch'
>> 
>> - Ran 'git add -p .' from the root of my git repository.
>> 
>> - I was able to normally stage my changes, but was presented with a
>> "warning: empty strings as pathspecs will be made invalid in upcoming
>> releases. please use . instead if you meant to match all paths"
>> message.
>> 
>> - I expected no warning message since I included a "." with my original 
>> command.
>> 
>> I believe that I should not be seeing this warning message as I
>> included the requested "." pathspec.

Yes, this seems to be caused by pathspec.c::prefix_pathspec()
overwriting the original pathspec "." into "".  The callchain
looks like this:

    builtin/add.c::interactive_add()
     -> parse_pathspec()
        passes argv[] that has "." to the caller,
        receives pathspec whose pathspec->items[].original
        is supposed to point at the unmolested original,
        but prefix_pathspec() munges "." into ""
     -> run_add_interactive()
        which runs "git add--interactive" with
        pathspec->items[].original as pathspecs


Perhaps this would work it around, but there should be a better way
to fix it (like, making sure that what we call "original" indeed
stays "original").

 builtin/add.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/builtin/add.c b/builtin/add.c
index e8fb80b36e..137097192d 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -167,9 +167,18 @@ int run_add_interactive(const char *revision, const char 
*patch_mode,
        if (revision)
                argv_array_push(&argv, revision);
        argv_array_push(&argv, "--");
-       for (i = 0; i < pathspec->nr; i++)
+       for (i = 0; i < pathspec->nr; i++) {
                /* pass original pathspec, to be re-parsed */
+               if (!*pathspec->items[i].original) {
+                       /*
+                        * work around a misfeature in parse_pathspecs()
+                        * that munges "." into "".
+                        */
+                       argv_array_push(&argv, ".");
+                       continue;
+               }
                argv_array_push(&argv, pathspec->items[i].original);
+       }
 
        status = run_command_v_opt(argv.argv, RUN_GIT_CMD);
        argv_array_clear(&argv);
@@ -180,7 +189,7 @@ int interactive_add(int argc, const char **argv, const char 
*prefix, int patch)
 {
        struct pathspec pathspec;
 
-       parse_pathspec(&pathspec, 0,
+       parse_pathspec(&pathspec, 0,
                       PATHSPEC_PREFER_FULL |
                       PATHSPEC_SYMLINK_LEADING_PATH |
                       PATHSPEC_PREFIX_ORIGIN,

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