Add a "check-files" command, which is useful for scripting

patches.

In particular, it verifies that all the listed files are up-to-date
in the cache (or don't exist and are ready to be added).

1 files changed, 47 insertions, 0 deletions

diff --git a/check-files.c b/check-files.c
new file mode 100644
index 000000000..c74bf87d2
--- /dev/null
+++ b/check-files.c
@@ -0,0 +1,47 @@
+/*
+ * check-files.c
+ *
+ * Check that a set of files are up-to-date in the filesystem or
+ * do not exist. Used to verify a patch target before doing a patch.
+ *
+ * Copyright (C) 2005 Linus Torvalds
+ */
+#include "cache.h"
+
+static void check_file(const char *path)
+{
+	int fd = open(path, O_RDONLY);
+	struct cache_entry *ce;
+	struct stat st;
+	int pos, changed;
+
+	/* Nonexistent is fine */
+	if (fd < 0) {
+		if (errno != ENOENT)
+			usage("%s: %s", path, strerror(errno));
+		return;
+	}
+
+	/* Exists but is not in the cache is not fine */
+	pos = cache_name_pos(path, strlen(path));
+	if (pos < 0)
+		usage("preparing to update existing file '%s' not in cache", path);
+	ce = active_cache[pos];
+
+	if (fstat(fd, &st) < 0)
+		usage("fstat(%s): %s", path, strerror(errno));
+
+	changed = cache_match_stat(ce, &st);
+	if (changed)
+		usage("preparing to update file '%s' not uptodate in cache", path);
+}
+
+int main(int argc, char **argv)
+{
+	int i;
+
+	read_cache();
+	for (i = 1; i < argc ; i++)
+		check_file(argv[i]);
+	return 0;
+}