[PATCH] adjust git-deltafy-script to the new diff-tree output format
[gitweb.git] / checkout-cache.c
index 367b9c7991f7e78954805e526d785b715446f1a9..9cd289c35a8707feaa8c2c5ea1e6591c00fb0a12 100644 (file)
@@ -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",
  * 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, not_new = 0;
+static int force = 0, quiet = 0, not_new = 0, refresh_cache = 0;
 
 static void create_directories(const char *path)
 {
@@ -46,8 +48,49 @@ static void create_directories(const char *path)
                len = slash - path;
                memcpy(buf, path, len);
                buf[len] = 0;
-               mkdir(buf, 0755);
+               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)
@@ -55,10 +98,11 @@ 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 == ENOENT) {
-                       create_directories(path);
+               if (errno == EISDIR && force) {
+                       remove_subtree(path);
                        fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
                }
        }
@@ -76,7 +120,9 @@ static int write_entry(struct cache_entry *ce, const char *path)
 
        new = read_sha1_file(ce->sha1, type, &size);
        if (!new || strcmp(type, "blob")) {
-               return error("checkout-cache: unable to read sha1 file of %s (%s)",
+               if (new)
+                       free(new);
+               return error("git-checkout-cache: unable to read sha1 file of %s (%s)",
                        path, sha1_to_hex(ce->sha1));
        }
        switch (ntohl(ce->ce_mode) & S_IFMT) {
@@ -84,28 +130,35 @@ static int write_entry(struct cache_entry *ce, const char *path)
                fd = create_file(path, ntohl(ce->ce_mode));
                if (fd < 0) {
                        free(new);
-                       return error("checkout-cache: unable to create file %s (%s)",
+                       return error("git-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);
+                       return error("git-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)",
+                       return error("git-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 error("git-checkout-cache: unknown file mode for %s", path);
+       }
+
+       if (refresh_cache) {
+               struct stat st;
+               lstat(ce->name, &st);
+               fill_stat_cache_info(ce, &st);
        }
        return 0;
 }
@@ -120,12 +173,12 @@ static int checkout_entry(struct cache_entry *ce, const char *base_dir)
        strcpy(path + len, ce->name);
 
        if (!lstat(path, &st)) {
-               unsigned changed = cache_match_stat(ce, &st);
+               unsigned changed = ce_match_stat(ce, &st);
                if (!changed)
                        return 0;
                if (!force) {
                        if (!quiet)
-                               fprintf(stderr, "checkout-cache: %s already exists\n", path);
+                               fprintf(stderr, "git-checkout-cache: %s already exists\n", path);
                        return 0;
                }
 
@@ -148,7 +201,7 @@ static int checkout_file(const char *name, const char *base_dir)
                if (!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)) ?
@@ -177,6 +230,8 @@ 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");
@@ -205,12 +260,37 @@ int main(int argc, char **argv)
                                not_new = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "-u")) {
+                               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;
                                continue;
                        }
                }
+               if (base_dir[0]) {
+                       /* when --prefix is specified we do not
+                        * want to update cache.
+                        */
+                       if (refresh_cache) {
+                               close(newfd); newfd = -1;
+                               rollback_index_file(&cache_file);
+                       }
+                       refresh_cache = 0;
+               }
                checkout_file(arg, base_dir);
        }
+
+       if (0 <= newfd &&
+           (write_cache(newfd, active_cache, active_nr) ||
+            commit_index_file(&cache_file)))
+               die("Unable to write new cachefile");
        return 0;
 }