read-tree: add "--super-prefix" option, eliminate global
The "--super-prefix" option to "git" was initially added in [1] for
use with "ls-files"[2], and shortly thereafter "submodule--helper"[3]
and "grep"[4]. It wasn't until [5] that "read-tree" made use of it.
At the time [5] made sense, but since then we've made "ls-files"
recurse in-process in [6], "grep" in [7], and finally
"submodule--helper" in the preceding commits.
Let's also remove it from "read-tree", which allows us to remove the
option to "git" itself.
We can do this because the only remaining user of it is the submodule
API, which will now invoke "read-tree" with its new "--super-prefix"
option. It will only do so when the "submodule_move_head()" function
is called.
That "submodule_move_head()" function was then only invoked by
"read-tree" itself, but now rather than setting an environment
variable to pass "--super-prefix" between cmd_read_tree() we:
- Set a new "super_prefix" in "struct unpack_trees_options". The
"super_prefixed()" function in "unpack-trees.c" added in [5] will now
use this, rather than get_super_prefix() looking up the environment
variable we set earlier in the same process.
- Add the same field to the "struct checkout", which is only needed to
ferry the "super_prefix" in the "struct unpack_trees_options" all the
way down to the "entry.c" callers of "submodule_move_head()".
Those calls which used the super prefix all originated in
"cmd_read_tree()". The only other caller is the "unlink_entry()"
caller in "builtin/checkout.c", which now passes a "NULL".
1. 74866d75793 (git: make super-prefix option, 2016-10-07)
2. e77aa336f11 (ls-files: optionally recurse into submodules, 2016-10-07)
3. 89c86265576 (submodule helper: support super prefix, 2016-12-08)
4. 0281e487fd9 (grep: optionally recurse into submodules, 2016-12-16)
5. 3d415425c7b (unpack-trees: support super-prefix option, 2017-01-17)
6. 188dce131fa (ls-files: use repository object, 2017-06-22)
7. f9ee2fcdfa0 (grep: recurse in-process using 'struct repository', 2017-08-02)
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/entry.c b/entry.c
index 616e4f0..971ab26 100644
--- a/entry.c
+++ b/entry.c
@@ -383,7 +383,7 @@ static int write_entry(struct cache_entry *ce, char *path, struct conv_attrs *ca
return error("cannot create submodule directory %s", path);
sub = submodule_from_ce(ce);
if (sub)
- return submodule_move_head(ce->name,
+ return submodule_move_head(ce->name, state->super_prefix,
NULL, oid_to_hex(&ce->oid),
state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
break;
@@ -476,7 +476,7 @@ int checkout_entry_ca(struct cache_entry *ce, struct conv_attrs *ca,
* no pathname to return.
*/
BUG("Can't remove entry to a path");
- unlink_entry(ce);
+ unlink_entry(ce, state->super_prefix);
return 0;
}
@@ -510,10 +510,10 @@ int checkout_entry_ca(struct cache_entry *ce, struct conv_attrs *ca,
if (!(st.st_mode & S_IFDIR))
unlink_or_warn(ce->name);
- return submodule_move_head(ce->name,
+ return submodule_move_head(ce->name, state->super_prefix,
NULL, oid_to_hex(&ce->oid), 0);
} else
- return submodule_move_head(ce->name,
+ return submodule_move_head(ce->name, state->super_prefix,
"HEAD", oid_to_hex(&ce->oid),
state->force ? SUBMODULE_MOVE_HEAD_FORCE : 0);
}
@@ -560,12 +560,12 @@ int checkout_entry_ca(struct cache_entry *ce, struct conv_attrs *ca,
return write_entry(ce, path.buf, ca, state, 0, nr_checkouts);
}
-void unlink_entry(const struct cache_entry *ce)
+void unlink_entry(const struct cache_entry *ce, const char *super_prefix)
{
const struct submodule *sub = submodule_from_ce(ce);
if (sub) {
/* state.force is set at the caller. */
- submodule_move_head(ce->name, "HEAD", NULL,
+ submodule_move_head(ce->name, super_prefix, "HEAD", NULL,
SUBMODULE_MOVE_HEAD_FORCE);
}
if (check_leading_path(ce->name, ce_namelen(ce), 1) >= 0)
