X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=checkout-cache.c;h=18729374fc5da8a6c7b568fe571bac58e705545d;hb=1bb4624417dc7a9a73454fae471e6d2b195ae84d;hp=1b50da8f1a8107d81a005b025df971e8a497f940;hpb=f7391ce3bd306c5731bc8206f8a0fa0947ca9474;p=git.git

diff --git a/checkout-cache.c b/checkout-cache.c
index 1b50da8f..18729374 100644
--- a/checkout-cache.c
+++ b/checkout-cache.c
@@ -32,72 +32,189 @@
  * of "-a" causing problems (not possible in the above example,
  * but get used to it in scripting!).
  */
+#include <sys/types.h>
+#include <dirent.h>
 #include "cache.h"
 
-static int force = 0, quiet = 0;
+static int force = 0, quiet = 0, not_new = 0;
 
-static int write_entry(struct cache_entry *ce)
+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;
+		if (mkdir(buf, 0755)) {
+			if (errno == EEXIST) {
+				struct stat st;
+				if (!lstat(buf, &st) && S_ISDIR(st.st_mode))
+					continue; /* ok */
+				if (force && !unlink(buf) && !mkdir(buf, 0755))
+					continue;
+			}
+			die("cannot create directory at %s", buf);
+		}
+	}
+	free(buf);
+}
+
+static void remove_subtree(const char *path)
+{
+	DIR *dir = opendir(path);
+	struct dirent *de;
+	char pathbuf[PATH_MAX];
+	char *name;
+	
+	if (!dir)
+		die("cannot opendir %s", path);
+	strcpy(pathbuf, path);
+	name = pathbuf + strlen(path);
+	*name++ = '/';
+	while ((de = readdir(dir)) != NULL) {
+		struct stat st;
+		if ((de->d_name[0] == '.') &&
+		    ((de->d_name[1] == 0) ||
+		     ((de->d_name[1] == '.') && de->d_name[2] == 0)))
+			continue;
+		strcpy(name, de->d_name);
+		if (lstat(pathbuf, &st))
+			die("cannot lstat %s", pathbuf);
+		if (S_ISDIR(st.st_mode))
+			remove_subtree(pathbuf);
+		else if (unlink(pathbuf))
+			die("cannot unlink %s", pathbuf);
+	}
+	closedir(dir);
+	if (rmdir(path))
+		die("cannot rmdir %s", path);
+}
+
+static int create_file(const char *path, unsigned int mode)
+{
+	int fd;
+
+	mode = (mode & 0100) ? 0777 : 0666;
+	create_directories(path);
+	fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
+	if (fd < 0) {
+		if (errno == EISDIR && force) {
+			remove_subtree(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, "blob", &size);
-	if (!new) {
-		fprintf(stderr, "checkout-cache: unable to read sha1 file of %s (%s)\n",
-			ce->name, sha1_to_hex(ce->sha1));
-		return -1;
+	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));
 	}
-	fd = open(ce->name, O_WRONLY | O_CREAT | O_TRUNC, 0600);
-	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)
 {
-	if (!force) {
-		struct stat st;
+	struct stat st;
+	static char path[MAXPATHLEN+1];
+	int len = strlen(base_dir);
 
-		if (!stat(ce->name, &st)) {
-			unsigned changed = cache_match_stat(ce, &st);
-			if (changed && !quiet)
-				fprintf(stderr, "checkout-cache: %s already exists\n", ce->name);
+	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;
 		}
-	}
-	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;
@@ -106,17 +223,17 @@ 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, "--")) {
@@ -131,8 +248,16 @@ 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;
 }