vcs-svn: avoid using ls command twice

Currently there are two functions to retrieve the mode and content
at a path:

	const char *repo_read_path(const uint32_t *path);
	uint32_t repo_read_mode(const uint32_t *path)

Replace them with a single function with two return values.  This
means we can use one round-trip to get the same information from
fast-import that previously took two.

Signed-off-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>

Author: barrbrain

vcs-svn/repo_tree.c

@@ -8,39 +8,23 @@
 #include "repo_tree.h"
 #include "fast_export.h"
 
-const char *repo_read_path(const uint32_t *path)
+const char *repo_read_path(const uint32_t *path, uint32_t *mode_out)
 {
 	int err;
-	uint32_t dummy;
 	static struct strbuf buf = STRBUF_INIT;
 
 	strbuf_reset(&buf);
-	err = fast_export_ls(REPO_MAX_PATH_DEPTH, path, &dummy, &buf);
+	err = fast_export_ls(REPO_MAX_PATH_DEPTH, path, mode_out, &buf);
 	if (err) {
 		if (errno != ENOENT)
 			die_errno("BUG: unexpected fast_export_ls error");
+		/* Treat missing paths as directories. */
+		*mode_out = REPO_MODE_DIR;
 		return NULL;
 	}
 	return buf.buf;
 }
 
-uint32_t repo_read_mode(const uint32_t *path)
-{
-	int err;
-	uint32_t result;
-	static struct strbuf dummy = STRBUF_INIT;
-
-	strbuf_reset(&dummy);
-	err = fast_export_ls(REPO_MAX_PATH_DEPTH, path, &result, &dummy);
-	if (err) {
-		if (errno != ENOENT)
-			die_errno("BUG: unexpected fast_export_ls error");
-		/* Treat missing paths as directories. */
-		return REPO_MODE_DIR;
-	}
-	return result;
-}
-
 void repo_copy(uint32_t revision, const uint32_t *src, const uint32_t *dst)
 {
 	int err;

vcs-svn/repo_tree.h

@@ -14,8 +14,7 @@
 uint32_t next_blob_mark(void);
 void repo_copy(uint32_t revision, const uint32_t *src, const uint32_t *dst);
 void repo_add(uint32_t *path, uint32_t mode, uint32_t blob_mark);
-const char *repo_read_path(const uint32_t *path);
-uint32_t repo_read_mode(const uint32_t *path);
+const char *repo_read_path(const uint32_t *path, uint32_t *mode_out);
 void repo_delete(uint32_t *path);
 void repo_commit(uint32_t revision, uint32_t author, char *log, uint32_t uuid,
 		 uint32_t url, long unsigned timestamp);

vcs-svn/svndump.c

@@ -246,8 +246,7 @@ static void handle_node(void)
 		old_data = NULL;
 	} else if (node_ctx.action == NODEACT_CHANGE) {
 		uint32_t mode;
-		old_data = repo_read_path(node_ctx.dst);
-		mode = repo_read_mode(node_ctx.dst);
+		old_data = repo_read_path(node_ctx.dst, &mode);
 		if (mode == REPO_MODE_DIR && type != REPO_MODE_DIR)
 			die("invalid dump: cannot modify a directory into a file");
 		if (mode != REPO_MODE_DIR && type == REPO_MODE_DIR)