X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=checkout-cache.c;h=244ebd122601883e15e8aefea33c7daf8249d862;hb=92747a907cba83938def6e7eb3ee1b4d3d9e609f;hp=6ed8b69eca879aed6d25105d29533dc789918e73;hpb=29d76d4b05bc537ac59fd1e6f849ab3386c01502;p=git.git

diff --git a/checkout-cache.c b/checkout-cache.c
index 6ed8b69e..244ebd12 100644
--- a/checkout-cache.c
+++ b/checkout-cache.c
@@ -34,12 +34,12 @@
  */
 #include "cache.h"
 
-static int force = 0, quiet = 0;
+static int force = 0, quiet = 0, not_new = 0;
 
 static void create_directories(const char *path)
 {
 	int len = strlen(path);
-	char *buf = malloc(len + 1);
+	char *buf = xmalloc(len + 1);
 	const char *slash = path;
 
 	while ((slash = strchr(slash+1, '/')) != NULL) {
@@ -52,83 +52,123 @@ static void create_directories(const char *path)
 
 static int create_file(const char *path, unsigned int mode)
 {
-	int fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0600);
+	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, 0600);
+			fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
 		}
 	}
-	if (fd >= 0)
-		fchmod(fd, mode);
 	return fd;
 }
 
-static int write_entry(struct cache_entry *ce)
+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")) {
-		fprintf(stderr, "checkout-cache: unable to read sha1 file of %s (%s)\n",
-			ce->name, sha1_to_hex(ce->sha1));
-		return -1;
+		return error("checkout-cache: unable to read sha1 file of %s (%s)",
+			path, sha1_to_hex(ce->sha1));
 	}
-	fd = create_file(ce->name, ce->st_mode);
-	if (fd < 0) {
-		fprintf(stderr, "checkout-cache: unable to create %s (%s)\n",
-			ce->name, strerror(errno));
+	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);
-		return -1;
+		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);
 	}
-	wrote = write(fd, new, size);
-	close(fd);
-	free(new);
-	if (wrote == size)
-		return 0;
-	fprintf(stderr, "checkout-cache: unable to write %s\n", ce->name);
-	return -1;
+	return 0;
 }
 
-static int checkout_entry(struct cache_entry *ce)
+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 (!stat(ce->name, &st)) {
+	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", ce->name);
+				fprintf(stderr, "checkout-cache: %s already exists\n", path);
 			return 0;
 		}
-	}
-	return write_entry(ce);
+
+		/*
+		 * 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)
+static int checkout_file(const char *name, const char *base_dir)
 {
 	int pos = cache_name_pos(name, strlen(name));
 	if (pos < 0) {
-		if (!quiet)
-			fprintf(stderr, "checkout-cache: %s is not in the cache\n", name);
+		if (!quiet) {
+			pos = -pos - 1;
+			fprintf(stderr,
+				"checkout-cache: %s is %s.\n",
+				name,
+				(pos < active_nr &&
+				 !strcmp(active_cache[pos]->name, name)) ?
+				"unmerged" : "not in the cache");
+		}
 		return -1;
 	}
-	return checkout_entry(active_cache[pos]);
+	return checkout_entry(active_cache[pos], base_dir);
 }
 
-static int checkout_all(void)
+static int checkout_all(const char *base_dir)
 {
 	int i;
 
 	for (i = 0; i < active_nr ; i++) {
 		struct cache_entry *ce = active_cache[i];
-		if (checkout_entry(ce) < 0)
+		if (ce_stage(ce))
+			continue;
+		if (checkout_entry(ce, base_dir) < 0)
 			return -1;
 	}
 	return 0;
@@ -137,17 +177,17 @@ static int checkout_all(void)
 int main(int argc, char **argv)
 {
 	int i, force_filename = 0;
+	const char *base_dir = "";
 
 	if (read_cache() < 0) {
-		fprintf(stderr, "Invalid cache\n");
-		exit(1);
+		die("invalid cache");
 	}
 
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		if (!force_filename) {
 			if (!strcmp(arg, "-a")) {
-				checkout_all();
+				checkout_all(base_dir);
 				continue;
 			}
 			if (!strcmp(arg, "--")) {
@@ -162,8 +202,16 @@ int main(int argc, char **argv)
 				quiet = 1;
 				continue;
 			}
+			if (!strcmp(arg, "-n")) {
+				not_new = 1;
+				continue;
+			}
+			if (!memcmp(arg, "--prefix=", 9)) {
+				base_dir = arg+9;
+				continue;
+			}
 		}
-		checkout_file(arg);
+		checkout_file(arg, base_dir);
 	}
 	return 0;
 }