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-rw-r--r--remote.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/remote.h b/remote.h
index 4a1209ae2c..dd4402436f 100644
--- a/remote.h
+++ b/remote.h
@@ -409,4 +409,36 @@ int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
int is_empty_cas(const struct push_cas_option *);
void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
+/*
+ * The `url` argument is the URL that navigates to the submodule origin
+ * repo. When relative, this URL is relative to the superproject origin
+ * URL repo. The `up_path` argument, if specified, is the relative
+ * path that navigates from the submodule working tree to the superproject
+ * working tree. Returns the origin URL of the submodule.
+ *
+ * Return either an absolute URL or filesystem path (if the superproject
+ * origin URL is an absolute URL or filesystem path, respectively) or a
+ * relative file system path (if the superproject origin URL is a relative
+ * file system path).
+ *
+ * When the output is a relative file system path, the path is either
+ * relative to the submodule working tree, if up_path is specified, or to
+ * the superproject working tree otherwise.
+ *
+ * NEEDSWORK: This works incorrectly on the domain and protocol part.
+ * remote_url url outcome expectation
+ * http://a.com/b ../c http://a.com/c as is
+ * http://a.com/b/ ../c http://a.com/c same as previous line, but
+ * ignore trailing slash in url
+ * http://a.com/b ../../c http://c error out
+ * http://a.com/b ../../../c http:/c error out
+ * http://a.com/b ../../../../c http:c error out
+ * http://a.com/b ../../../../../c .:c error out
+ * http://a.com/b http://d.org/e http://d.org/e as is
+ * NEEDSWORK: Given how chop_last_dir() works, this function is broken
+ * when a local part has a colon in its path component, too.
+ */
+char *relative_url(const char *remote_url, const char *url,
+ const char *up_path);
+
#endif