Look up a request's commit in one place

The diff page now names a revision that is no commit the way the
request wrote it, as the other pages already did, rather than as the
full id it resolved to. The helpers sit beside the error page in
ui-shared.c, since shared.c prints nothing.

1 file changed, 14 insertions, 0 deletions

diff --git a/source/ui-shared.h b/source/ui-shared.hindex fb02d7b..871dba0 100644--- a/source/ui-shared.h+++ b/source/ui-shared.h@@ -121,6 +121,20 @@ extern void cgit_print_error_page(int code, const char *msg, const char *fmt, ..  * Answer with the error page for a blob of size bytes past max-blob-size.  */ extern void cgit_print_blob_too_large(size_t size);++/*+ * Resolve rev to the parsed commit it names, peeling a tag, with oid set to+ * what rev itself names. Returns NULL once the 404 page naming rev is out.+ */+extern struct commit *cgit_get_commit(const char *rev, struct object_id *oid);++/*+ * Fill oid with the older end of a comparison with commit, which is what+ * old_rev names when it is given, else commit's first parent, else the null+ * id for a root commit. Returns -1 once the 404 page for old_rev is out.+ */+extern int cgit_get_old_oid(const char *old_rev, const struct commit *commit, struct object_id *oid);+ extern void cgit_print_filemode(unsigned short mode); extern void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref, 	const char *separator);
diff --git a/source/ui-shared.h b/source/ui-shared.h
index fb02d7b..871dba0 100644
--- a/source/ui-shared.h
+++ b/source/ui-shared.h
@@ -121,6 +121,20 @@ extern void cgit_print_error_page(int code, const char *msg, const char *fmt, ..
  * Answer with the error page for a blob of size bytes past max-blob-size.
  */
 extern void cgit_print_blob_too_large(size_t size);
+
+/*
+ * Resolve rev to the parsed commit it names, peeling a tag, with oid set to
+ * what rev itself names. Returns NULL once the 404 page naming rev is out.
+ */
+extern struct commit *cgit_get_commit(const char *rev, struct object_id *oid);
+
+/*
+ * Fill oid with the older end of a comparison with commit, which is what
+ * old_rev names when it is given, else commit's first parent, else the null
+ * id for a root commit. Returns -1 once the 404 page for old_rev is out.
+ */
+extern int cgit_get_old_oid(const char *old_rev, const struct commit *commit, struct object_id *oid);
+
 extern void cgit_print_filemode(unsigned short mode);
 extern void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
 	const char *separator);