1 files changed, 186 insertions, 0 deletions
diff --git a/third_party/git/list-objects-filter-options.c b/third_party/git/list-objects-filter-options.c
new file mode 100644
index 0000000000..1cb20c659c
--- /dev/null
+++ b/third_party/git/list-objects-filter-options.c
@@ -0,0 +1,186 @@
+#include "cache.h"
+#include "commit.h"
+#include "config.h"
+#include "revision.h"
+#include "argv-array.h"
+#include "list-objects.h"
+#include "list-objects-filter.h"
+#include "list-objects-filter-options.h"
+
+/*
+ * Parse value of the argument to the "filter" keyword.
+ * On the command line this looks like:
+ *       --filter=<arg>
+ * and in the pack protocol as:
+ *       "filter" SP <arg>
+ *
+ * The filter keyword will be used by many commands.
+ * See Documentation/rev-list-options.txt for allowed values for <arg>.
+ *
+ * Capture the given arg as the "filter_spec".  This can be forwarded to
+ * subordinate commands when necessary (although it's better to pass it through
+ * expand_list_objects_filter_spec() first).  We also "intern" the arg for the
+ * convenience of the current command.
+ */
+static int gently_parse_list_objects_filter(
+	struct list_objects_filter_options *filter_options,
+	const char *arg,
+	struct strbuf *errbuf)
+{
+	const char *v0;
+
+	if (filter_options->choice) {
+		if (errbuf) {
+			strbuf_addstr(
+				errbuf,
+				_("multiple filter-specs cannot be combined"));
+		}
+		return 1;
+	}
+
+	filter_options->filter_spec = strdup(arg);
+
+	if (!strcmp(arg, "blob:none")) {
+		filter_options->choice = LOFC_BLOB_NONE;
+		return 0;
+
+	} else if (skip_prefix(arg, "blob:limit=", &v0)) {
+		if (git_parse_ulong(v0, &filter_options->blob_limit_value)) {
+			filter_options->choice = LOFC_BLOB_LIMIT;
+			return 0;
+		}
+
+	} else if (skip_prefix(arg, "tree:", &v0)) {
+		if (!git_parse_ulong(v0, &filter_options->tree_exclude_depth)) {
+			if (errbuf) {
+				strbuf_addstr(
+					errbuf,
+					_("expected 'tree:<depth>'"));
+			}
+			return 1;
+		}
+		filter_options->choice = LOFC_TREE_DEPTH;
+		return 0;
+
+	} else if (skip_prefix(arg, "sparse:oid=", &v0)) {
+		struct object_context oc;
+		struct object_id sparse_oid;
+
+		/*
+		 * Try to parse <oid-expression> into an OID for the current
+		 * command, but DO NOT complain if we don't have the blob or
+		 * ref locally.
+		 */
+		if (!get_oid_with_context(the_repository, v0, GET_OID_BLOB,
+					  &sparse_oid, &oc))
+			filter_options->sparse_oid_value = oiddup(&sparse_oid);
+		filter_options->choice = LOFC_SPARSE_OID;
+		return 0;
+
+	} else if (skip_prefix(arg, "sparse:path=", &v0)) {
+		if (errbuf) {
+			strbuf_addstr(
+				errbuf,
+				_("sparse:path filters support has been dropped"));
+		}
+		return 1;
+	}
+	/*
+	 * Please update _git_fetch() in git-completion.bash when you
+	 * add new filters
+	 */
+
+	if (errbuf)
+		strbuf_addf(errbuf, _("invalid filter-spec '%s'"), arg);
+
+	memset(filter_options, 0, sizeof(*filter_options));
+	return 1;
+}
+
+int parse_list_objects_filter(struct list_objects_filter_options *filter_options,
+			      const char *arg)
+{
+	struct strbuf buf = STRBUF_INIT;
+	if (gently_parse_list_objects_filter(filter_options, arg, &buf))
+		die("%s", buf.buf);
+	return 0;
+}
+
+int opt_parse_list_objects_filter(const struct option *opt,
+				  const char *arg, int unset)
+{
+	struct list_objects_filter_options *filter_options = opt->value;
+
+	if (unset || !arg) {
+		list_objects_filter_set_no_filter(filter_options);
+		return 0;
+	}
+
+	return parse_list_objects_filter(filter_options, arg);
+}
+
+void expand_list_objects_filter_spec(
+	const struct list_objects_filter_options *filter,
+	struct strbuf *expanded_spec)
+{
+	strbuf_init(expanded_spec, strlen(filter->filter_spec));
+	if (filter->choice == LOFC_BLOB_LIMIT)
+		strbuf_addf(expanded_spec, "blob:limit=%lu",
+			    filter->blob_limit_value);
+	else if (filter->choice == LOFC_TREE_DEPTH)
+		strbuf_addf(expanded_spec, "tree:%lu",
+			    filter->tree_exclude_depth);
+	else
+		strbuf_addstr(expanded_spec, filter->filter_spec);
+}
+
+void list_objects_filter_release(
+	struct list_objects_filter_options *filter_options)
+{
+	free(filter_options->filter_spec);
+	free(filter_options->sparse_oid_value);
+	memset(filter_options, 0, sizeof(*filter_options));
+}
+
+void partial_clone_register(
+	const char *remote,
+	const struct list_objects_filter_options *filter_options)
+{
+	/*
+	 * Record the name of the partial clone remote in the
+	 * config and in the global variable -- the latter is
+	 * used throughout to indicate that partial clone is
+	 * enabled and to expect missing objects.
+	 */
+	if (repository_format_partial_clone &&
+	    *repository_format_partial_clone &&
+	    strcmp(remote, repository_format_partial_clone))
+		die(_("cannot change partial clone promisor remote"));
+
+	git_config_set("core.repositoryformatversion", "1");
+	git_config_set("extensions.partialclone", remote);
+
+	repository_format_partial_clone = xstrdup(remote);
+
+	/*
+	 * Record the initial filter-spec in the config as
+	 * the default for subsequent fetches from this remote.
+	 */
+	core_partial_clone_filter_default =
+		xstrdup(filter_options->filter_spec);
+	git_config_set("core.partialclonefilter",
+		       core_partial_clone_filter_default);
+}
+
+void partial_clone_get_default_filter_spec(
+	struct list_objects_filter_options *filter_options)
+{
+	/*
+	 * Parse default value, but silently ignore it if it is invalid.
+	 */
+	if (!core_partial_clone_filter_default)
+		return;
+	gently_parse_list_objects_filter(filter_options,
+					 core_partial_clone_filter_default,
+					 NULL);
+}