Adding upstream version 1:2.43.0.upstream/1%2.43.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 223 insertions, 0 deletions

diff --git a/tree.c b/tree.c
new file mode 100644
index 0000000..990f9c9
--- /dev/null
+++ b/tree.c
@@ -0,0 +1,223 @@
+#include "git-compat-util.h"
+#include "cache-tree.h"
+#include "hex.h"
+#include "tree.h"
+#include "object-name.h"
+#include "object-store-ll.h"
+#include "blob.h"
+#include "commit.h"
+#include "tag.h"
+#include "alloc.h"
+#include "tree-walk.h"
+#include "repository.h"
+#include "environment.h"
+
+const char *tree_type = "tree";
+
+int read_tree_at(struct repository *r,
+		 struct tree *tree, struct strbuf *base,
+		 int depth,
+		 const struct pathspec *pathspec,
+		 read_tree_fn_t fn, void *context)
+{
+	struct tree_desc desc;
+	struct name_entry entry;
+	struct object_id oid;
+	int len, oldlen = base->len;
+	enum interesting retval = entry_not_interesting;
+
+	if (depth > max_allowed_tree_depth)
+		return error("exceeded maximum allowed tree depth");
+
+	if (parse_tree(tree))
+		return -1;
+
+	init_tree_desc(&desc, tree->buffer, tree->size);
+
+	while (tree_entry(&desc, &entry)) {
+		if (retval != all_entries_interesting) {
+			retval = tree_entry_interesting(r->index, &entry,
+							base, pathspec);
+			if (retval == all_entries_not_interesting)
+				break;
+			if (retval == entry_not_interesting)
+				continue;
+		}
+
+		switch (fn(&entry.oid, base,
+			   entry.path, entry.mode, context)) {
+		case 0:
+			continue;
+		case READ_TREE_RECURSIVE:
+			break;
+		default:
+			return -1;
+		}
+
+		if (S_ISDIR(entry.mode))
+			oidcpy(&oid, &entry.oid);
+		else if (S_ISGITLINK(entry.mode)) {
+			struct commit *commit;
+
+			commit = lookup_commit(r, &entry.oid);
+			if (!commit)
+				die("Commit %s in submodule path %s%s not found",
+				    oid_to_hex(&entry.oid),
+				    base->buf, entry.path);
+
+			if (repo_parse_commit(r, commit))
+				die("Invalid commit %s in submodule path %s%s",
+				    oid_to_hex(&entry.oid),
+				    base->buf, entry.path);
+
+			oidcpy(&oid, get_commit_tree_oid(commit));
+		}
+		else
+			continue;
+
+		len = tree_entry_len(&entry);
+		strbuf_add(base, entry.path, len);
+		strbuf_addch(base, '/');
+		retval = read_tree_at(r, lookup_tree(r, &oid),
+				      base, depth + 1, pathspec,
+				      fn, context);
+		strbuf_setlen(base, oldlen);
+		if (retval)
+			return -1;
+	}
+	return 0;
+}
+
+int read_tree(struct repository *r,
+	      struct tree *tree,
+	      const struct pathspec *pathspec,
+	      read_tree_fn_t fn, void *context)
+{
+	struct strbuf sb = STRBUF_INIT;
+	int ret = read_tree_at(r, tree, &sb, 0, pathspec, fn, context);
+	strbuf_release(&sb);
+	return ret;
+}
+
+int base_name_compare(const char *name1, size_t len1, int mode1,
+		      const char *name2, size_t len2, int mode2)
+{
+	unsigned char c1, c2;
+	size_t len = len1 < len2 ? len1 : len2;
+	int cmp;
+
+	cmp = memcmp(name1, name2, len);
+	if (cmp)
+		return cmp;
+	c1 = name1[len];
+	c2 = name2[len];
+	if (!c1 && S_ISDIR(mode1))
+		c1 = '/';
+	if (!c2 && S_ISDIR(mode2))
+		c2 = '/';
+	return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
+}
+
+/*
+ * df_name_compare() is identical to base_name_compare(), except it
+ * compares conflicting directory/file entries as equal. Note that
+ * while a directory name compares as equal to a regular file, they
+ * then individually compare _differently_ to a filename that has
+ * a dot after the basename (because '\0' < '.' < '/').
+ *
+ * This is used by routines that want to traverse the git namespace
+ * but then handle conflicting entries together when possible.
+ */
+int df_name_compare(const char *name1, size_t len1, int mode1,
+		    const char *name2, size_t len2, int mode2)
+{
+	unsigned char c1, c2;
+	size_t len = len1 < len2 ? len1 : len2;
+	int cmp;
+
+	cmp = memcmp(name1, name2, len);
+	if (cmp)
+		return cmp;
+	/* Directories and files compare equal (same length, same name) */
+	if (len1 == len2)
+		return 0;
+	c1 = name1[len];
+	if (!c1 && S_ISDIR(mode1))
+		c1 = '/';
+	c2 = name2[len];
+	if (!c2 && S_ISDIR(mode2))
+		c2 = '/';
+	if (c1 == '/' && !c2)
+		return 0;
+	if (c2 == '/' && !c1)
+		return 0;
+	return c1 - c2;
+}
+
+int name_compare(const char *name1, size_t len1, const char *name2, size_t len2)
+{
+	size_t min_len = (len1 < len2) ? len1 : len2;
+	int cmp = memcmp(name1, name2, min_len);
+	if (cmp)
+		return cmp;
+	if (len1 < len2)
+		return -1;
+	if (len1 > len2)
+		return 1;
+	return 0;
+}
+
+struct tree *lookup_tree(struct repository *r, const struct object_id *oid)
+{
+	struct object *obj = lookup_object(r, oid);
+	if (!obj)
+		return create_object(r, oid, alloc_tree_node(r));
+	return object_as_type(obj, OBJ_TREE, 0);
+}
+
+int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
+{
+	if (item->object.parsed)
+		return 0;
+	item->object.parsed = 1;
+	item->buffer = buffer;
+	item->size = size;
+
+	return 0;
+}
+
+int parse_tree_gently(struct tree *item, int quiet_on_missing)
+{
+	 enum object_type type;
+	 void *buffer;
+	 unsigned long size;
+
+	if (item->object.parsed)
+		return 0;
+	buffer = repo_read_object_file(the_repository, &item->object.oid,
+				       &type, &size);
+	if (!buffer)
+		return quiet_on_missing ? -1 :
+			error("Could not read %s",
+			     oid_to_hex(&item->object.oid));
+	if (type != OBJ_TREE) {
+		free(buffer);
+		return error("Object %s not a tree",
+			     oid_to_hex(&item->object.oid));
+	}
+	return parse_tree_buffer(item, buffer, size);
+}
+
+void free_tree_buffer(struct tree *tree)
+{
+	FREE_AND_NULL(tree->buffer);
+	tree->size = 0;
+	tree->object.parsed = 0;
+}
+
+struct tree *parse_tree_indirect(const struct object_id *oid)
+{
+	struct repository *r = the_repository;
+	struct object *obj = parse_object(r, oid);
+	return (struct tree *)repo_peel_to_type(r, NULL, 0, obj, OBJ_TREE);
+}