The interface will be used for git-mv and git-rm submodule support.
So far, only the submodule_by_path() function is defined, however more
can be probably expected in the future if/when the git-submodule command
is ported from shell.
Signed-off-by: Petr Baudis <pasky@xxxxxxx>
---
Makefile | 2 ++
submodule.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
submodule.h | 8 ++++++++
3 files changed, 60 insertions(+), 0 deletions(-)
create mode 100644 submodule.c
create mode 100644 submodule.h
diff --git a/Makefile b/Makefile
index 9b52071..742b5cb 100644
--- a/Makefile
+++ b/Makefile
@@ -368,6 +368,7 @@ LIB_H += run-command.h
LIB_H += sha1-lookup.h
LIB_H += sideband.h
LIB_H += strbuf.h
+LIB_H += submodule.h
LIB_H += tag.h
LIB_H += transport.h
LIB_H += tree.h
@@ -458,6 +459,7 @@ LIB_OBJS += sha1_name.o
LIB_OBJS += shallow.o
LIB_OBJS += sideband.o
LIB_OBJS += strbuf.o
+LIB_OBJS += submodule.o
LIB_OBJS += symlinks.o
LIB_OBJS += tag.o
LIB_OBJS += trace.o
diff --git a/submodule.c b/submodule.c
new file mode 100644
index 0000000..2883ae6
--- /dev/null
+++ b/submodule.c
@@ -0,0 +1,50 @@
+#include "cache.h"
+#include "submodule.h"
+
+
+struct gitmodules_info {
+ const char *path;
+ char *key;
+};
+
+static int gitmodules_worker(const char *key, const char *value, void *info_)
+{
+ struct gitmodules_info *info = info_;
+ const char *subkey;
+
+ if (prefixcmp(key, "submodule."))
+ return 0;
+
+ subkey = strrchr(key, '.');
+ if (!subkey)
+ return 0;
+
+ if (strcmp(subkey, ".path"))
+ return 0;
+
+ if (strcmp(value, info->path))
+ return 0;
+
+ /* Found the key to change. */
+ if (info->key) {
+ error("multiple submodules live at path `%s'", info->path);
+ /* The last one is supposed to win. */
+ free(info->key);
+ }
+ info->key = xstrdup(key);
+ return 0;
+}
+
+char *submodule_by_path(const char *path)
+{
+ struct gitmodules_info info = { path, NULL };
+
+ config_exclusive_filename = ".gitmodules";
+ if (git_config(gitmodules_worker, &info))
+ die("cannot process .gitmodules");
+ if (!info.key)
+ die("the submodule of `%s' not found in .gitmodules", path);
+ config_exclusive_filename = NULL;
+
+ return info.key;
+}
diff --git a/submodule.h b/submodule.h
new file mode 100644
index 0000000..bc74fa0
--- /dev/null
+++ b/submodule.h
@@ -0,0 +1,8 @@
+#ifndef SUBMODULE_H
+#define SUBMODULE_H
+
+/* Find submodule living at given path in .gitmodules and return the key
+ * of its path config variable (dynamically allocated). */
+extern char *submodule_by_path(const char *path);
+
+#endif
--
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