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-rw-r--r--ls-tree.c227
1 files changed, 22 insertions, 205 deletions
diff --git a/ls-tree.c b/ls-tree.c
index d7c7e75..598b729 100644
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -13,217 +13,32 @@ static int line_termination = '\n';
#define LS_TREE_ONLY 2
static int ls_options = 0;
-static struct tree_entry_list root_entry;
-
-static void prepare_root(unsigned char *sha1)
-{
- unsigned char rsha[20];
- unsigned long size;
- void *buf;
- struct tree *root_tree;
-
- buf = read_object_with_reference(sha1, "tree", &size, rsha);
- free(buf);
- if (!buf)
- die("Could not read %s", sha1_to_hex(sha1));
-
- root_tree = lookup_tree(rsha);
- if (!root_tree)
- die("Could not read %s", sha1_to_hex(sha1));
-
- /* Prepare a fake entry */
- root_entry.directory = 1;
- root_entry.executable = root_entry.symlink = 0;
- root_entry.mode = S_IFDIR;
- root_entry.name = "";
- root_entry.item.tree = root_tree;
- root_entry.parent = NULL;
-}
-
-static int prepare_children(struct tree_entry_list *elem)
-{
- if (!elem->directory)
- return -1;
- if (!elem->item.tree->object.parsed) {
- struct tree_entry_list *e;
- if (parse_tree(elem->item.tree))
- return -1;
- /* Set up the parent link */
- for (e = elem->item.tree->entries; e; e = e->next)
- e->parent = elem;
- }
- return 0;
-}
-
-static struct tree_entry_list *find_entry(const char *path, char *pathbuf)
-{
- const char *next, *slash;
- int len;
- struct tree_entry_list *elem = &root_entry, *oldelem = NULL;
-
- *(pathbuf) = '\0';
-
- /* Find tree element, descending from root, that
- * corresponds to the named path, lazily expanding
- * the tree if possible.
- */
-
- while (path) {
- /* The fact we still have path means that the caller
- * wants us to make sure that elem at this point is a
- * directory, and possibly descend into it. Even what
- * is left is just trailing slashes, we loop back to
- * here, and this call to prepare_children() will
- * catch elem not being a tree. Nice.
- */
- if (prepare_children(elem))
- return NULL;
-
- slash = strchr(path, '/');
- if (!slash) {
- len = strlen(path);
- next = NULL;
- }
- else {
- next = slash + 1;
- len = slash - path;
- }
- if (len) {
- if (oldelem) {
- pathbuf += sprintf(pathbuf, "%s/", oldelem->name);
- }
-
- /* (len == 0) if the original path was "drivers/char/"
- * and we have run already two rounds, having elem
- * pointing at the drivers/char directory.
- */
- elem = elem->item.tree->entries;
- while (elem) {
- if ((strlen(elem->name) == len) &&
- !strncmp(elem->name, path, len)) {
- /* found */
- break;
- }
- elem = elem->next;
- }
- if (!elem)
- return NULL;
-
- oldelem = elem;
- }
- path = next;
- }
-
- return elem;
-}
-
-static const char *entry_type(struct tree_entry_list *e)
-{
- return (e->directory ? "tree" : "blob");
-}
-
-static const char *entry_hex(struct tree_entry_list *e)
-{
- return sha1_to_hex(e->directory
- ? e->item.tree->object.sha1
- : e->item.blob->object.sha1);
-}
-
-/* forward declaration for mutually recursive routines */
-static int show_entry(struct tree_entry_list *, int, char *pathbuf);
+static const char ls_tree_usage[] =
+ "git-ls-tree [-d] [-r] [-z] <tree-ish> [path...]";
-static int show_children(struct tree_entry_list *e, int level, char *pathbuf)
+static int show_tree(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
{
- int oldlen = strlen(pathbuf);
+ const char *type = "blob";
+ int retval = 0;
- if (e != &root_entry)
- sprintf(pathbuf + oldlen, "%s/", e->name);
-
- if (prepare_children(e))
- die("internal error: ls-tree show_children called with non tree");
- e = e->item.tree->entries;
- while (e) {
- show_entry(e, level, pathbuf);
- e = e->next;
+ if (S_ISDIR(mode)) {
+ type = "tree";
+ if (ls_options & LS_RECURSIVE)
+ retval = READ_TREE_RECURSIVE;
}
- pathbuf[oldlen] = '\0';
-
- return 0;
+ printf("%06o %s %s\t%.*s%s%c", mode, type, sha1_to_hex(sha1), baselen, base, pathname, line_termination);
+ return retval;
}
-static int show_entry(struct tree_entry_list *e, int level, char *pathbuf)
+int main(int argc, const char **argv)
{
- int err = 0;
-
- if (e != &root_entry) {
- int pathlen = strlen(pathbuf);
- printf("%06o %s %s ",
- e->mode, entry_type(e), entry_hex(e));
- write_name_quoted(pathbuf, pathlen, e->name,
- line_termination, stdout);
- putchar(line_termination);
- }
-
- if (e->directory) {
- /* If this is a directory, we have the following cases:
- * (1) This is the top-level request (explicit path from the
- * command line, or "root" if there is no command line).
- * a. Without any flag. We show direct children. We do not
- * recurse into them.
- * b. With -r. We do recurse into children.
- * c. With -d. We do not recurse into children.
- * (2) We came here because our caller is either (1-a) or
- * (1-b).
- * a. Without any flag. We do not show our children (which
- * are grandchildren for the original request).
- * b. With -r. We continue to recurse into our children.
- * c. With -d. We should not have come here to begin with.
- */
- if (level == 0 && !(ls_options & LS_TREE_ONLY))
- /* case (1)-a and (1)-b */
- err = err | show_children(e, level+1, pathbuf);
- else if (level && ls_options & LS_RECURSIVE)
- /* case (2)-b */
- err = err | show_children(e, level+1, pathbuf);
- }
- return err;
-}
-
-static int list_one(const char *path)
-{
- int err = 0;
- char pathbuf[MAXPATHLEN + 1];
- struct tree_entry_list *e = find_entry(path, pathbuf);
- if (!e) {
- /* traditionally ls-tree does not complain about
- * missing path. We may change this later to match
- * what "/bin/ls -a" does, which is to complain.
- */
- return err;
- }
- err = err | show_entry(e, 0, pathbuf);
- return err;
-}
-
-static int list(char **path)
-{
- int i;
- int err = 0;
- for (i = 0; path[i]; i++)
- err = err | list_one(path[i]);
- return err;
-}
-
-static const char ls_tree_usage[] =
- "git-ls-tree [-d] [-r] [-z] <tree-ish> [path...]";
-
-int main(int argc, char **argv)
-{
- static char *path0[] = { "", NULL };
- char **path;
+ const char **path, *prefix;
unsigned char sha1[20];
+ char *buf;
+ unsigned long size;
+ prefix = setup_git_directory();
while (1 < argc && argv[1][0] == '-') {
switch (argv[1][1]) {
case 'z':
@@ -246,9 +61,11 @@ int main(int argc, char **argv)
if (get_sha1(argv[1], sha1) < 0)
usage(ls_tree_usage);
- path = (argc == 2) ? path0 : (argv + 2);
- prepare_root(sha1);
- if (list(path) < 0)
- die("list failed");
+ path = get_pathspec(prefix, argv + 2);
+ buf = read_object_with_reference(sha1, "tree", &size, NULL);
+ if (!buf)
+ die("not a tree object");
+ read_tree_recursive(buf, size, "", 0, 0, path, show_tree);
+
return 0;
}