Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream

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

1 files changed, 272 insertions, 0 deletions

diff --git a/promisor-remote.c b/promisor-remote.c
new file mode 100644
index 0000000..faa7612
--- /dev/null
+++ b/promisor-remote.c
@@ -0,0 +1,272 @@
+#include "cache.h"
+#include "object-store.h"
+#include "promisor-remote.h"
+#include "config.h"
+#include "transport.h"
+#include "strvec.h"
+#include "packfile.h"
+
+struct promisor_remote_config {
+	struct promisor_remote *promisors;
+	struct promisor_remote **promisors_tail;
+};
+
+static int fetch_objects(struct repository *repo,
+			 const char *remote_name,
+			 const struct object_id *oids,
+			 int oid_nr)
+{
+	struct child_process child = CHILD_PROCESS_INIT;
+	int i;
+	FILE *child_in;
+
+	child.git_cmd = 1;
+	child.in = -1;
+	if (repo != the_repository)
+		prepare_other_repo_env(&child.env, repo->gitdir);
+	strvec_pushl(&child.args, "-c", "fetch.negotiationAlgorithm=noop",
+		     "fetch", remote_name, "--no-tags",
+		     "--no-write-fetch-head", "--recurse-submodules=no",
+		     "--filter=blob:none", "--stdin", NULL);
+	if (start_command(&child))
+		die(_("promisor-remote: unable to fork off fetch subprocess"));
+	child_in = xfdopen(child.in, "w");
+
+	trace2_data_intmax("promisor", repo, "fetch_count", oid_nr);
+
+	for (i = 0; i < oid_nr; i++) {
+		if (fputs(oid_to_hex(&oids[i]), child_in) < 0)
+			die_errno(_("promisor-remote: could not write to fetch subprocess"));
+		if (fputc('\n', child_in) < 0)
+			die_errno(_("promisor-remote: could not write to fetch subprocess"));
+	}
+
+	if (fclose(child_in) < 0)
+		die_errno(_("promisor-remote: could not close stdin to fetch subprocess"));
+	return finish_command(&child) ? -1 : 0;
+}
+
+static struct promisor_remote *promisor_remote_new(struct promisor_remote_config *config,
+						   const char *remote_name)
+{
+	struct promisor_remote *r;
+
+	if (*remote_name == '/') {
+		warning(_("promisor remote name cannot begin with '/': %s"),
+			remote_name);
+		return NULL;
+	}
+
+	FLEX_ALLOC_STR(r, name, remote_name);
+
+	*config->promisors_tail = r;
+	config->promisors_tail = &r->next;
+
+	return r;
+}
+
+static struct promisor_remote *promisor_remote_lookup(struct promisor_remote_config *config,
+						      const char *remote_name,
+						      struct promisor_remote **previous)
+{
+	struct promisor_remote *r, *p;
+
+	for (p = NULL, r = config->promisors; r; p = r, r = r->next)
+		if (!strcmp(r->name, remote_name)) {
+			if (previous)
+				*previous = p;
+			return r;
+		}
+
+	return NULL;
+}
+
+static void promisor_remote_move_to_tail(struct promisor_remote_config *config,
+					 struct promisor_remote *r,
+					 struct promisor_remote *previous)
+{
+	if (!r->next)
+		return;
+
+	if (previous)
+		previous->next = r->next;
+	else
+		config->promisors = r->next ? r->next : r;
+	r->next = NULL;
+	*config->promisors_tail = r;
+	config->promisors_tail = &r->next;
+}
+
+static int promisor_remote_config(const char *var, const char *value, void *data)
+{
+	struct promisor_remote_config *config = data;
+	const char *name;
+	size_t namelen;
+	const char *subkey;
+
+	if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
+		return 0;
+
+	if (!strcmp(subkey, "promisor")) {
+		char *remote_name;
+
+		if (!git_config_bool(var, value))
+			return 0;
+
+		remote_name = xmemdupz(name, namelen);
+
+		if (!promisor_remote_lookup(config, remote_name, NULL))
+			promisor_remote_new(config, remote_name);
+
+		free(remote_name);
+		return 0;
+	}
+	if (!strcmp(subkey, "partialclonefilter")) {
+		struct promisor_remote *r;
+		char *remote_name = xmemdupz(name, namelen);
+
+		r = promisor_remote_lookup(config, remote_name, NULL);
+		if (!r)
+			r = promisor_remote_new(config, remote_name);
+
+		free(remote_name);
+
+		if (!r)
+			return 0;
+
+		return git_config_string(&r->partial_clone_filter, var, value);
+	}
+
+	return 0;
+}
+
+static void promisor_remote_init(struct repository *r)
+{
+	struct promisor_remote_config *config;
+
+	if (r->promisor_remote_config)
+		return;
+	config = r->promisor_remote_config =
+		xcalloc(1, sizeof(*r->promisor_remote_config));
+	config->promisors_tail = &config->promisors;
+
+	repo_config(r, promisor_remote_config, config);
+
+	if (r->repository_format_partial_clone) {
+		struct promisor_remote *o, *previous;
+
+		o = promisor_remote_lookup(config,
+					   r->repository_format_partial_clone,
+					   &previous);
+		if (o)
+			promisor_remote_move_to_tail(config, o, previous);
+		else
+			promisor_remote_new(config, r->repository_format_partial_clone);
+	}
+}
+
+void promisor_remote_clear(struct promisor_remote_config *config)
+{
+	while (config->promisors) {
+		struct promisor_remote *r = config->promisors;
+		config->promisors = config->promisors->next;
+		free(r);
+	}
+
+	config->promisors_tail = &config->promisors;
+}
+
+void repo_promisor_remote_reinit(struct repository *r)
+{
+	promisor_remote_clear(r->promisor_remote_config);
+	FREE_AND_NULL(r->promisor_remote_config);
+	promisor_remote_init(r);
+}
+
+struct promisor_remote *repo_promisor_remote_find(struct repository *r,
+						  const char *remote_name)
+{
+	promisor_remote_init(r);
+
+	if (!remote_name)
+		return r->promisor_remote_config->promisors;
+
+	return promisor_remote_lookup(r->promisor_remote_config, remote_name, NULL);
+}
+
+int repo_has_promisor_remote(struct repository *r)
+{
+	return !!repo_promisor_remote_find(r, NULL);
+}
+
+static int remove_fetched_oids(struct repository *repo,
+			       struct object_id **oids,
+			       int oid_nr, int to_free)
+{
+	int i, remaining_nr = 0;
+	int *remaining = xcalloc(oid_nr, sizeof(*remaining));
+	struct object_id *old_oids = *oids;
+	struct object_id *new_oids;
+
+	for (i = 0; i < oid_nr; i++)
+		if (oid_object_info_extended(repo, &old_oids[i], NULL,
+					     OBJECT_INFO_SKIP_FETCH_OBJECT)) {
+			remaining[i] = 1;
+			remaining_nr++;
+		}
+
+	if (remaining_nr) {
+		int j = 0;
+		CALLOC_ARRAY(new_oids, remaining_nr);
+		for (i = 0; i < oid_nr; i++)
+			if (remaining[i])
+				oidcpy(&new_oids[j++], &old_oids[i]);
+		*oids = new_oids;
+		if (to_free)
+			free(old_oids);
+	}
+
+	free(remaining);
+
+	return remaining_nr;
+}
+
+void promisor_remote_get_direct(struct repository *repo,
+				const struct object_id *oids,
+				int oid_nr)
+{
+	struct promisor_remote *r;
+	struct object_id *remaining_oids = (struct object_id *)oids;
+	int remaining_nr = oid_nr;
+	int to_free = 0;
+	int i;
+
+	if (oid_nr == 0)
+		return;
+
+	promisor_remote_init(repo);
+
+	for (r = repo->promisor_remote_config->promisors; r; r = r->next) {
+		if (fetch_objects(repo, r->name, remaining_oids, remaining_nr) < 0) {
+			if (remaining_nr == 1)
+				continue;
+			remaining_nr = remove_fetched_oids(repo, &remaining_oids,
+							 remaining_nr, to_free);
+			if (remaining_nr) {
+				to_free = 1;
+				continue;
+			}
+		}
+		goto all_fetched;
+	}
+
+	for (i = 0; i < remaining_nr; i++) {
+		if (is_promisor_object(&remaining_oids[i]))
+			die(_("could not fetch %s from promisor remote"),
+			    oid_to_hex(&remaining_oids[i]));
+	}
+
+all_fetched:
+	if (to_free)
+		free(remaining_oids);
+}