commit-graph: don't pass filename to load_commit_graph_one_fd_st()

An earlier change implemented load_commit_graph_one_fd_st() in a way
that was bug-compatible with earlier code in terms of the "graph file
%s is too small" error message printing out the path to the
commit-graph (".git/objects/info/commit-graph").

But change that, because:

 * A function that takes an already-open file descriptor also needing
   the filename isn't very intuitive.

 * The vast majority of errors we might emit when loading the graph
   come from parse_commit_graph(), which doesn't report the
   filename. Let's not do that either in this case for consistency.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: avar

builtin/commit-graph.c

@@ -64,7 +64,7 @@ static int graph_verify(int argc, const char **argv)
 	open_ok = open_commit_graph(graph_name, &fd, &st);
 	if (!open_ok)
 		return 0;
-	graph = load_commit_graph_one_fd_st(graph_name, fd, &st);
+	graph = load_commit_graph_one_fd_st(fd, &st);
 	FREE_AND_NULL(graph_name);
 
 	if (!graph)
@@ -102,7 +102,7 @@ static int graph_read(int argc, const char **argv)
 	if (!open_ok)
 		die_errno(_("Could not open commit-graph '%s'"), graph_name);
 
-	graph = load_commit_graph_one_fd_st(graph_name, fd, &st);
+	graph = load_commit_graph_one_fd_st(fd, &st);
 	if (!graph)
 		return 1;
 

commit-graph.c

@@ -92,8 +92,7 @@ int open_commit_graph(const char *graph_file, int *fd, struct stat *st)
 	return 1;
 }
 
-struct commit_graph *load_commit_graph_one_fd_st(const char *graph_file,
-						 int fd, struct stat *st)
+struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st)
 {
 	void *graph_map;
 	size_t graph_size;
@@ -103,7 +102,7 @@ struct commit_graph *load_commit_graph_one_fd_st(const char *graph_file,
 
 	if (graph_size < GRAPH_MIN_SIZE) {
 		close(fd);
-		error(_("graph file %s is too small"), graph_file);
+		error(_("commit-graph file is too small"));
 		return NULL;
 	}
 	graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0);
@@ -284,7 +283,7 @@ static struct commit_graph *load_commit_graph_one(const char *graph_file)
 	if (!open_ok)
 		return NULL;
 
-	return load_commit_graph_one_fd_st(graph_file, fd, &st);
+	return load_commit_graph_one_fd_st(fd, &st);
 }
 
 static void prepare_commit_graph_one(struct repository *r, const char *obj_dir)

commit-graph.h

@@ -53,8 +53,7 @@ struct commit_graph {
 	const unsigned char *chunk_extra_edges;
 };
 
-struct commit_graph *load_commit_graph_one_fd_st(const char *graph_file,
-						 int fd, struct stat *st);
+struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st);
 
 struct commit_graph *parse_commit_graph(void *graph_map, int fd,
 					size_t graph_size);