[PATCH] git-tar-tree: make file contents accessible to write_header()

[git.git] / ls-tree.c

diff --git a/ls-tree.c b/ls-tree.c
index 05c743a..339ac36 100644 (file)
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -5,49 +5,109 @@
  */
 #include "cache.h"
 
-static int list(unsigned char *sha1)
+int line_termination = '\n';
+int recursive = 0;
+
+struct path_prefix {
+       struct path_prefix *prev;
+       const char *name;
+};
+
+static void print_path_prefix(struct path_prefix *prefix)
 {
-       void *buffer;
-       unsigned long size;
-       char type[20];
+       if (prefix) {
+               if (prefix->prev)
+                       print_path_prefix(prefix->prev);
+               fputs(prefix->name, stdout);
+               putchar('/');
+       }
+}
+
+static void list_recursive(void *buffer,
+                          const unsigned char *type,
+                          unsigned long size,
+                          struct path_prefix *prefix)
+{
+       struct path_prefix this_prefix;
+       this_prefix.prev = prefix;
 
-       buffer = read_sha1_file(sha1, type, &size);
-       if (!buffer)
-               usage("unable to read sha1 file");
        if (strcmp(type, "tree"))
-               usage("expected a 'tree' node");
+               die("expected a 'tree' node");
+
        while (size) {
-               int len = strlen(buffer)+1;
-               unsigned char *sha1 = buffer + len;
-               char *path = strchr(buffer, ' ')+1;
+               int namelen = strlen(buffer)+1;
+               void *eltbuf;
+               char elttype[20];
+               unsigned long eltsize;
+               unsigned char *sha1 = buffer + namelen;
+               char *path = strchr(buffer, ' ') + 1;
                unsigned int mode;
-               unsigned char *type;
 
-               if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
-                       usage("corrupt 'tree' file");
+               if (size < namelen + 20 || sscanf(buffer, "%o", &mode) != 1)
+                       die("corrupt 'tree' file");
                buffer = sha1 + 20;
-               size -= len + 20;
-               /* XXX: We do some ugly mode heuristics here.
-                * It seems not worth it to read each file just to get this
-                * and the file size. -- pasky@ucw.cz */
-               type = S_ISDIR(mode) ? "tree" : "blob";
-               printf("%03o\t%s\t%s\t%s\n", mode, type, sha1_to_hex(sha1), path);
+               size -= namelen + 20;
+
+               printf("%06o\t%s\t%s\t", mode,
+                      S_ISDIR(mode) ? "tree" : "blob",
+                      sha1_to_hex(sha1));
+               print_path_prefix(prefix);
+               fputs(path, stdout);
+               putchar(line_termination);
+
+               if (! recursive || ! S_ISDIR(mode))
+                       continue;
+
+               if (! (eltbuf = read_sha1_file(sha1, elttype, &eltsize)) ) {
+                       error("cannot read %s", sha1_to_hex(sha1));
+                       continue;
+               }
+               this_prefix.name = path;
+               list_recursive(eltbuf, elttype, eltsize, &this_prefix);
+               free(eltbuf);
        }
+}
+
+static int list(unsigned char *sha1)
+{
+       void *buffer;
+       unsigned long size;
+
+       buffer = read_object_with_reference(sha1, "tree", &size, 0);
+       if (!buffer)
+               die("unable to read sha1 file");
+       list_recursive(buffer, "tree", size, NULL);
        return 0;
 }
 
+static const char *ls_tree_usage = "ls-tree [-r] [-z] <key>";
+
 int main(int argc, char **argv)
 {
        unsigned char sha1[20];
 
+       while (1 < argc && argv[1][0] == '-') {
+               switch (argv[1][1]) {
+               case 'z':
+                       line_termination = 0;
+                       break;
+               case 'r':
+                       recursive = 1;
+                       break;
+               default:
+                       usage(ls_tree_usage);
+               }
+               argc--; argv++;
+       }
+
        if (argc != 2)
-               usage("ls-tree <key>");
-       if (get_sha1_hex(argv[1], sha1) < 0)
-               usage("ls-tree <key>");
+               usage(ls_tree_usage);
+       if (get_sha1(argv[1], sha1) < 0)
+               usage(ls_tree_usage);
        sha1_file_directory = getenv(DB_ENVIRONMENT);
        if (!sha1_file_directory)
                sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
        if (list(sha1) < 0)
-               usage("list failed");
+               die("list failed");
        return 0;
 }