1 files changed, 138 insertions, 0 deletions
diff --git a/submodule-config.h b/submodule-config.h
new file mode 100644
index 0000000..2a37689
--- /dev/null
+++ b/submodule-config.h
@@ -0,0 +1,138 @@
+#ifndef SUBMODULE_CONFIG_CACHE_H
+#define SUBMODULE_CONFIG_CACHE_H
+
+#include "config.h"
+#include "hashmap.h"
+#include "submodule.h"
+#include "strbuf.h"
+#include "tree-walk.h"
+
+/**
+ * The submodule config cache API allows to read submodule
+ * configurations/information from specified revisions. Internally
+ * information is lazily read into a cache that is used to avoid
+ * unnecessary parsing of the same .gitmodules files. Lookups can be done by
+ * submodule path or name.
+ *
+ * Usage
+ * -----
+ *
+ * The caller can look up information about submodules by using the
+ * `submodule_from_path()` or `submodule_from_name()` functions. They return
+ * a `struct submodule` which contains the values. The API automatically
+ * initializes and allocates the needed infrastructure on-demand. If the
+ * caller does only want to lookup values from revisions the initialization
+ * can be skipped.
+ *
+ * If the internal cache might grow too big or when the caller is done with
+ * the API, all internally cached values can be freed with submodule_free().
+ *
+ */
+
+/*
+ * Submodule entry containing the information about a certain submodule
+ * in a certain revision. It is returned by the lookup functions.
+ */
+struct submodule {
+	const char *path;
+	const char *name;
+	const char *url;
+	enum submodule_recurse_mode fetch_recurse;
+	const char *ignore;
+	const char *branch;
+	struct submodule_update_strategy update_strategy;
+	/* the object id of the responsible .gitmodules file */
+	struct object_id gitmodules_oid;
+	int recommend_shallow;
+};
+struct submodule_cache;
+struct repository;
+
+void submodule_cache_free(struct submodule_cache *cache);
+
+int parse_submodule_fetchjobs(const char *var, const char *value,
+			      const struct key_value_info *kvi);
+int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg);
+struct option;
+int option_fetch_parse_recurse_submodules(const struct option *opt,
+					  const char *arg, int unset);
+int parse_update_recurse_submodules_arg(const char *opt, const char *arg);
+int parse_push_recurse_submodules_arg(const char *opt, const char *arg);
+void repo_read_gitmodules(struct repository *repo, int skip_if_read);
+void gitmodules_config_oid(const struct object_id *commit_oid);
+
+/**
+ * Same as submodule_from_path but lookup by name.
+ */
+const struct submodule *submodule_from_name(struct repository *r,
+					    const struct object_id *commit_or_tree,
+					    const char *name);
+
+/**
+ * Given a tree-ish in the superproject and a path, return the submodule that
+ * is bound at the path in the named tree.
+ */
+const struct submodule *submodule_from_path(struct repository *r,
+					    const struct object_id *commit_or_tree,
+					    const char *path);
+
+/**
+ * Use these to free the internally cached values.
+ */
+void submodule_free(struct repository *r);
+
+int print_config_from_gitmodules(struct repository *repo, const char *key);
+int config_set_in_gitmodules_file_gently(const char *key, const char *value);
+
+/*
+ * Returns 0 if the name is syntactically acceptable as a submodule "name"
+ * (e.g., that may be found in the subsection of a .gitmodules file) and -1
+ * otherwise.
+ */
+int check_submodule_name(const char *name);
+
+/*
+ * Note: these helper functions exist solely to maintain backward
+ * compatibility with 'fetch' and 'update_clone' storing configuration in
+ * '.gitmodules'.
+ *
+ * New helpers to retrieve arbitrary configuration from the '.gitmodules' file
+ * should NOT be added.
+ */
+void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules);
+void update_clone_config_from_gitmodules(int *max_jobs);
+
+/*
+ * Submodule entry that contains relevant information about a
+ * submodule in a tree.
+ */
+struct submodule_tree_entry {
+	/* The submodule's tree entry. */
+	struct name_entry *name_entry;
+	/*
+	 * A struct repository corresponding to the submodule. May be
+	 * NULL if the submodule has not been updated.
+	 */
+	struct repository *repo;
+	/*
+	 * A struct submodule containing the submodule config in the
+	 * tree's .gitmodules.
+	 */
+	const struct submodule *submodule;
+};
+
+struct submodule_entry_list {
+	struct submodule_tree_entry *entries;
+	int entry_nr;
+	int entry_alloc;
+};
+
+/**
+ * Given a treeish, return all submodules in the tree and its subtrees,
+ * but excluding nested submodules. Callers that require nested
+ * submodules are expected to recurse into the submodules themselves.
+ */
+void submodules_of_tree(struct repository *r,
+			const struct object_id *treeish_name,
+			struct submodule_entry_list *ret);
+#endif /* SUBMODULE_CONFIG_H */