X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=checkout-cache.c;h=8d67403ae86c6deafe4c2db5fef8af64f9fe6ecc;hb=3e386508f87278610d1892aaaa08cd17907f71c5;hp=b561ef487ee093207ba2034e1142614276d1e5a9;hpb=aceedfe32e766b169d480c0ec24777d1b09bb118;p=git.git

diff --git a/checkout-cache.c b/checkout-cache.c
index b561ef48..8d67403a 100644
--- a/checkout-cache.c
+++ b/checkout-cache.c
@@ -5,22 +5,22 @@
  *
  * Careful: order of argument flags does matter. For example,
  *
- *	checkout-cache -a -f file.c
+ *	git-checkout-cache -a -f file.c
  *
  * Will first check out all files listed in the cache (but not
  * overwrite any old ones), and then force-checkout "file.c" a
  * second time (ie that one _will_ overwrite any old contents
  * with the same filename).
  *
- * Also, just doing "checkout-cache" does nothing. You probably
- * meant "checkout-cache -a". And if you want to force it, you
- * want "checkout-cache -f -a".
+ * Also, just doing "git-checkout-cache" does nothing. You probably
+ * meant "git-checkout-cache -a". And if you want to force it, you
+ * want "git-checkout-cache -f -a".
  *
  * Intuitiveness is not the goal here. Repeatability is. The
  * reason for the "no arguments means no work" thing is that
  * from scripts you are supposed to be able to do things like
  *
- *	find . -name '*.h' -print0 | xargs -0 checkout-cache -f --
+ *	find . -name '*.h' -print0 | xargs -0 git-checkout-cache -f --
  *
  * which will force all existing *.h files to be replaced with
  * their cached copies. If an empty command line implied "all",
@@ -34,125 +34,23 @@
  */
 #include "cache.h"
 
-static int force = 0, quiet = 0, not_new = 0;
+static struct checkout state = {
+	.base_dir = "",
+	.base_dir_len = 0,
+	.force = 0,
+	.quiet = 0,
+	.not_new = 0,
+	.refresh_cache = 0,
+};
 
-static void create_directories(const char *path)
-{
-	int len = strlen(path);
-	char *buf = xmalloc(len + 1);
-	const char *slash = path;
-
-	while ((slash = strchr(slash+1, '/')) != NULL) {
-		len = slash - path;
-		memcpy(buf, path, len);
-		buf[len] = 0;
-		mkdir(buf, 0755);
-	}
-	free(buf);
-}
-
-static int create_file(const char *path, unsigned int mode)
-{
-	int fd;
-
-	mode = (mode & 0100) ? 0777 : 0666;
-	fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
-	if (fd < 0) {
-		if (errno == ENOENT) {
-			create_directories(path);
-			fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
-		}
-	}
-	return fd;
-}
-
-static int write_entry(struct cache_entry *ce, const char *path)
-{
-	int fd;
-	void *new;
-	unsigned long size;
-	long wrote;
-	char type[20];
-	char target[1024];
-
-	new = read_sha1_file(ce->sha1, type, &size);
-	if (!new || strcmp(type, "blob")) {
-		if (new)
-			free(new);
-		return error("checkout-cache: unable to read sha1 file of %s (%s)",
-			path, sha1_to_hex(ce->sha1));
-	}
-	switch (ntohl(ce->ce_mode) & S_IFMT) {
-	case S_IFREG:
-		fd = create_file(path, ntohl(ce->ce_mode));
-		if (fd < 0) {
-			free(new);
-			return error("checkout-cache: unable to create file %s (%s)",
-				path, strerror(errno));
-		}
-		wrote = write(fd, new, size);
-		close(fd);
-		free(new);
-		if (wrote != size)
-			return error("checkout-cache: unable to write file %s", path);
-		break;
-	case S_IFLNK:
-		memcpy(target, new, size);
-		target[size] = '\0';
-		create_directories(path);
-		if (symlink(target, path)) {
-			free(new);
-			return error("checkout-cache: unable to create symlink %s (%s)",
-				path, strerror(errno));
-		}
-		free(new);
-		break;
-	default:
-		free(new);
-		return error("checkout-cache: unknown file mode for %s", path);
-	}
-	return 0;
-}
-
-static int checkout_entry(struct cache_entry *ce, const char *base_dir)
-{
-	struct stat st;
-	static char path[MAXPATHLEN+1];
-	int len = strlen(base_dir);
-
-	memcpy(path, base_dir, len);
-	strcpy(path + len, ce->name);
-
-	if (!lstat(path, &st)) {
-		unsigned changed = cache_match_stat(ce, &st);
-		if (!changed)
-			return 0;
-		if (!force) {
-			if (!quiet)
-				fprintf(stderr, "checkout-cache: %s already exists\n", path);
-			return 0;
-		}
-
-		/*
-		 * We unlink the old file, to get the new one with the
-		 * right permissions (including umask, which is nasty
-		 * to emulate by hand - much easier to let the system
-		 * just do the right thing)
-		 */
-		unlink(path);
-	} else if (not_new) 
-		return 0;
-	return write_entry(ce, path);
-}
-
-static int checkout_file(const char *name, const char *base_dir)
+static int checkout_file(const char *name)
 {
 	int pos = cache_name_pos(name, strlen(name));
 	if (pos < 0) {
-		if (!quiet) {
+		if (!state.quiet) {
 			pos = -pos - 1;
 			fprintf(stderr,
-				"checkout-cache: %s is %s.\n",
+				"git-checkout-cache: %s is %s.\n",
 				name,
 				(pos < active_nr &&
 				 !strcmp(active_cache[pos]->name, name)) ?
@@ -160,10 +58,10 @@ static int checkout_file(const char *name, const char *base_dir)
 		}
 		return -1;
 	}
-	return checkout_entry(active_cache[pos], base_dir);
+	return checkout_entry(active_cache[pos], &state);
 }
 
-static int checkout_all(const char *base_dir)
+static int checkout_all(void)
 {
 	int i;
 
@@ -171,16 +69,20 @@ static int checkout_all(const char *base_dir)
 		struct cache_entry *ce = active_cache[i];
 		if (ce_stage(ce))
 			continue;
-		if (checkout_entry(ce, base_dir) < 0)
+		if (checkout_entry(ce, &state) < 0)
 			return -1;
 	}
 	return 0;
 }
 
+static const char checkout_cache_usage[] =
+"git-checkout-cache [-u] [-q] [-a] [-f] [-n] [--prefix=<string>] [--] <file>...";
+
 int main(int argc, char **argv)
 {
 	int i, force_filename = 0;
-	const char *base_dir = "";
+	struct cache_file cache_file;
+	int newfd = -1;
 
 	if (read_cache() < 0) {
 		die("invalid cache");
@@ -190,7 +92,7 @@ int main(int argc, char **argv)
 		const char *arg = argv[i];
 		if (!force_filename) {
 			if (!strcmp(arg, "-a")) {
-				checkout_all(base_dir);
+				checkout_all();
 				continue;
 			}
 			if (!strcmp(arg, "--")) {
@@ -198,23 +100,51 @@ int main(int argc, char **argv)
 				continue;
 			}
 			if (!strcmp(arg, "-f")) {
-				force = 1;
+				state.force = 1;
 				continue;
 			}
 			if (!strcmp(arg, "-q")) {
-				quiet = 1;
+				state.quiet = 1;
 				continue;
 			}
 			if (!strcmp(arg, "-n")) {
-				not_new = 1;
+				state.not_new = 1;
+				continue;
+			}
+			if (!strcmp(arg, "-u")) {
+				state.refresh_cache = 1;
+				if (newfd < 0)
+					newfd = hold_index_file_for_update
+						(&cache_file,
+						 get_index_file());
+				if (newfd < 0)
+					die("cannot open index.lock file.");
 				continue;
 			}
 			if (!memcmp(arg, "--prefix=", 9)) {
-				base_dir = arg+9;
+				state.base_dir = arg+9;
+				state.base_dir_len = strlen(state.base_dir);
 				continue;
 			}
+			if (arg[0] == '-')
+				usage(checkout_cache_usage);
+		}
+		if (state.base_dir_len) {
+			/* when --prefix is specified we do not
+			 * want to update cache.
+			 */
+			if (state.refresh_cache) {
+				close(newfd); newfd = -1;
+				rollback_index_file(&cache_file);
+			}
+			state.refresh_cache = 0;
 		}
-		checkout_file(arg, base_dir);
+		checkout_file(arg);
 	}
+
+	if (0 <= newfd &&
+	    (write_cache(newfd, active_cache, active_nr) ||
+	     commit_index_file(&cache_file)))
+		die("Unable to write new cachefile");
 	return 0;
 }