In later patches we introduce the --recurse-submodule flag for commands
that modify the working directory, e.g. git-checkout.
It is potentially expensive to check if a submodule needs an update,
because a common theme to interact with submodules is to spawn a child
process for each interaction.
So let's introduce a function that checks if a submodule needs
to be checked for an update before attempting the update.
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
submodule.c | 27 +++++++++++++++++++++++++++
submodule.h | 13 +++++++++++++
2 files changed, 40 insertions(+)
diff --git a/submodule.c b/submodule.c
index 591f4a694e..2a37e03420 100644
--- a/submodule.c
+++ b/submodule.c
@@ -548,6 +548,33 @@ void set_config_update_recurse_submodules(int value)
config_update_recurse_submodules = value;
}
+int touch_submodules_in_worktree(void)
+{
+ /*
+ * Update can't be "none", "merge" or "rebase",
+ * treat any value as OFF, except an explicit ON.
+ */
+ return config_update_recurse_submodules == RECURSE_SUBMODULES_ON;
+}
+
+int is_active_submodule_with_strategy(const struct cache_entry *ce,
+ enum submodule_update_type strategy)
+{
+ const struct submodule *sub;
+
+ if (!S_ISGITLINK(ce->ce_mode))
+ return 0;
+
+ if (!touch_submodules_in_worktree())
+ return 0;
+
+ sub = submodule_from_path(null_sha1, ce->name);
+ if (!sub)
+ return 0;
+
+ return sub->update_strategy.type == strategy;
+}
+
static int has_remote(const char *refname, const struct object_id *oid,
int flags, void *cb_data)
{
diff --git a/submodule.h b/submodule.h
index b4e60c08d2..46d9f0f293 100644
--- a/submodule.h
+++ b/submodule.h
@@ -65,6 +65,19 @@ extern void show_submodule_inline_diff(FILE *f, const char *path,
const struct diff_options *opt);
extern void set_config_fetch_recurse_submodules(int value);
extern void set_config_update_recurse_submodules(int value);
+
+/*
+ * Traditionally Git ignored changes made for submodules.
+ * This function checks if we are interested in the given submodule
+ * for any kind of operation.
+ */
+extern int touch_submodules_in_worktree(void);
+/*
+ * Check if the given ce entry is a submodule with the given update
+ * strategy configured.
+ */
+extern int is_active_submodule_with_strategy(const struct cache_entry *ce,
+ enum submodule_update_type strategy);
extern void check_for_new_submodule_commits(unsigned char new_sha1[20]);
extern int fetch_populated_submodules(const struct argv_array *options,
const char *prefix, int command_line_option,
--
2.12.0.rc1.16.ge4278d41a0.dirty