hash-object: always try to set up the git repository

When "hash-object" is run without "-w", we don't need to be
in a git repository at all; we can just hash the object and
write its sha1 to stdout. However, if we _are_ in a git
repository, we would want to know that so we can follow the
normal rules for respecting config, .gitattributes, etc.

This happens to work at the top-level of a git repository
because we blindly read ".git/config", but as the included
test shows, it does not work when you are in a subdirectory.

The solution is to just do a "gentle" setup in this case. We
already take care to use prefix_filename() on any filename
arguments we get (to handle the "-w" case), so we don't need
to do anything extra to handle the side effects of repo
setup.

An alternative would be to specify RUN_SETUP_GENTLY for this
command in git.c, and then die if "-w" is set but we are not
in a repository. However, the error messages generated at
the time of setup_git_directory() are more detailed, so it's
better to find out which mode we are in, and then call the
appropriate function.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index f7d3567dd0ce2d75778d6cf011961c0f203432b4..9028e1fdccea2ad44a76792adc6e335fb44cfb5c 100644 (file)
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -87,6 +87,7 @@ int cmd_hash_object(int argc, const char **argv, const char *prefix)
        int stdin_paths = 0;
        int no_filters = 0;
        int literally = 0;
+       int nongit = 0;
        unsigned flags = HASH_FORMAT_CHECK;
        const char *vpath = NULL;
        const struct option hash_object_options[] = {
@@ -107,12 +108,14 @@ int cmd_hash_object(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, NULL, hash_object_options,
                             hash_object_usage, 0);
 
-       if (flags & HASH_WRITE_OBJECT) {
+       if (flags & HASH_WRITE_OBJECT)
                prefix = setup_git_directory();
-               prefix_length = prefix ? strlen(prefix) : 0;
-               if (vpath && prefix)
-                       vpath = prefix_filename(prefix, prefix_length, vpath);
-       }
+       else
+               prefix = setup_git_directory_gently(&nongit);
+
+       prefix_length = prefix ? strlen(prefix) : 0;
+       if (vpath && prefix)
+               vpath = prefix_filename(prefix, prefix_length, vpath);
 
        git_config(git_default_config, NULL);
 

diff --git a/t/t1007-hash-object.sh b/t/t1007-hash-object.sh
index 7d2baa15bbd0bbbe8c12631ad2d24b77e90b8775..285871c24d88c4667d547e957da682fd78bf6ab9 100755 (executable)
--- a/t/t1007-hash-object.sh
+++ b/t/t1007-hash-object.sh
@@ -121,6 +121,17 @@ test_expect_success 'check that appropriate filter is invoke when --path is used
        git config --unset core.autocrlf
 '
 
+test_expect_success 'gitattributes also work in a subdirectory' '
+       mkdir subdir &&
+       (
+               cd subdir &&
+               subdir_sha0=$(git hash-object ../file0) &&
+               subdir_sha1=$(git hash-object ../file1) &&
+               test "$file0_sha" = "$subdir_sha0" &&
+               test "$file1_sha" = "$subdir_sha1"
+       )
+'
+
 test_expect_success 'check that --no-filters option works' '
        echo fooQ | tr Q "\\015" >file0 &&
        cp file0 file1 &&