chore(3p/git): Unvendor git and track patches instead r/2903

This was vendored a long time ago under the expectation that keeping
it in sync with cgit would be easier this way, but it has proven not
to be a big issue.

On the other hand, a vendored copy of git is an annoying maintenance
burden. It is much easier to rebase the single (dottime) patch that we
have.

This removes the vendored copy of git and instead passes the git
source code to cgit via `pkgs.srcOnly`, which includes the applied
patch so that cgit can continue rendering dottime.

Change-Id: If31f62dea7ce688fd1b9050204e9378019775f2b

1 files changed, 0 insertions, 691 deletions

diff --git a/third_party/git/archive.c b/third_party/git/archive.c
deleted file mode 100644
index 3c1541af9e..0000000000
--- a/third_party/git/archive.c
+++ /dev/null
@@ -1,691 +0,0 @@
-#include "cache.h"
-#include "config.h"
-#include "refs.h"
-#include "object-store.h"
-#include "commit.h"
-#include "tree-walk.h"
-#include "attr.h"
-#include "archive.h"
-#include "parse-options.h"
-#include "unpack-trees.h"
-#include "dir.h"
-
-static char const * const archive_usage[] = {
-	N_("git archive [<options>] <tree-ish> [<path>...]"),
-	N_("git archive --list"),
-	N_("git archive --remote <repo> [--exec <cmd>] [<options>] <tree-ish> [<path>...]"),
-	N_("git archive --remote <repo> [--exec <cmd>] --list"),
-	NULL
-};
-
-static const struct archiver **archivers;
-static int nr_archivers;
-static int alloc_archivers;
-static int remote_allow_unreachable;
-
-void register_archiver(struct archiver *ar)
-{
-	ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers);
-	archivers[nr_archivers++] = ar;
-}
-
-void init_archivers(void)
-{
-	init_tar_archiver();
-	init_zip_archiver();
-}
-
-static void format_subst(const struct commit *commit,
-			 const char *src, size_t len,
-			 struct strbuf *buf)
-{
-	char *to_free = NULL;
-	struct strbuf fmt = STRBUF_INIT;
-	struct pretty_print_context ctx = {0};
-	ctx.date_mode.type = DATE_NORMAL;
-	ctx.abbrev = DEFAULT_ABBREV;
-
-	if (src == buf->buf)
-		to_free = strbuf_detach(buf, NULL);
-	for (;;) {
-		const char *b, *c;
-
-		b = memmem(src, len, "$Format:", 8);
-		if (!b)
-			break;
-		c = memchr(b + 8, '$', (src + len) - b - 8);
-		if (!c)
-			break;
-
-		strbuf_reset(&fmt);
-		strbuf_add(&fmt, b + 8, c - b - 8);
-
-		strbuf_add(buf, src, b - src);
-		format_commit_message(commit, fmt.buf, buf, &ctx);
-		len -= c + 1 - src;
-		src  = c + 1;
-	}
-	strbuf_add(buf, src, len);
-	strbuf_release(&fmt);
-	free(to_free);
-}
-
-static void *object_file_to_archive(const struct archiver_args *args,
-				    const char *path,
-				    const struct object_id *oid,
-				    unsigned int mode,
-				    enum object_type *type,
-				    unsigned long *sizep)
-{
-	void *buffer;
-	const struct commit *commit = args->convert ? args->commit : NULL;
-	struct checkout_metadata meta;
-
-	init_checkout_metadata(&meta, args->refname,
-			       args->commit_oid ? args->commit_oid :
-			       (args->tree ? &args->tree->object.oid : NULL), oid);
-
-	path += args->baselen;
-	buffer = read_object_file(oid, type, sizep);
-	if (buffer && S_ISREG(mode)) {
-		struct strbuf buf = STRBUF_INIT;
-		size_t size = 0;
-
-		strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
-		convert_to_working_tree(args->repo->index, path, buf.buf, buf.len, &buf, &meta);
-		if (commit)
-			format_subst(commit, buf.buf, buf.len, &buf);
-		buffer = strbuf_detach(&buf, &size);
-		*sizep = size;
-	}
-
-	return buffer;
-}
-
-struct directory {
-	struct directory *up;
-	struct object_id oid;
-	int baselen, len;
-	unsigned mode;
-	int stage;
-	char path[FLEX_ARRAY];
-};
-
-struct archiver_context {
-	struct archiver_args *args;
-	write_archive_entry_fn_t write_entry;
-	struct directory *bottom;
-};
-
-static const struct attr_check *get_archive_attrs(struct index_state *istate,
-						  const char *path)
-{
-	static struct attr_check *check;
-	if (!check)
-		check = attr_check_initl("export-ignore", "export-subst", NULL);
-	git_check_attr(istate, path, check);
-	return check;
-}
-
-static int check_attr_export_ignore(const struct attr_check *check)
-{
-	return check && ATTR_TRUE(check->items[0].value);
-}
-
-static int check_attr_export_subst(const struct attr_check *check)
-{
-	return check && ATTR_TRUE(check->items[1].value);
-}
-
-static int write_archive_entry(const struct object_id *oid, const char *base,
-		int baselen, const char *filename, unsigned mode, int stage,
-		void *context)
-{
-	static struct strbuf path = STRBUF_INIT;
-	struct archiver_context *c = context;
-	struct archiver_args *args = c->args;
-	write_archive_entry_fn_t write_entry = c->write_entry;
-	int err;
-	const char *path_without_prefix;
-	unsigned long size;
-	void *buffer;
-	enum object_type type;
-
-	args->convert = 0;
-	strbuf_reset(&path);
-	strbuf_grow(&path, PATH_MAX);
-	strbuf_add(&path, args->base, args->baselen);
-	strbuf_add(&path, base, baselen);
-	strbuf_addstr(&path, filename);
-	if (S_ISDIR(mode) || S_ISGITLINK(mode))
-		strbuf_addch(&path, '/');
-	path_without_prefix = path.buf + args->baselen;
-
-	if (!S_ISDIR(mode)) {
-		const struct attr_check *check;
-		check = get_archive_attrs(args->repo->index, path_without_prefix);
-		if (check_attr_export_ignore(check))
-			return 0;
-		args->convert = check_attr_export_subst(check);
-	}
-
-	if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
-		if (args->verbose)
-			fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
-		err = write_entry(args, oid, path.buf, path.len, mode, NULL, 0);
-		if (err)
-			return err;
-		return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
-	}
-
-	if (args->verbose)
-		fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
-
-	/* Stream it? */
-	if (S_ISREG(mode) && !args->convert &&
-	    oid_object_info(args->repo, oid, &size) == OBJ_BLOB &&
-	    size > big_file_threshold)
-		return write_entry(args, oid, path.buf, path.len, mode, NULL, size);
-
-	buffer = object_file_to_archive(args, path.buf, oid, mode, &type, &size);
-	if (!buffer)
-		return error(_("cannot read %s"), oid_to_hex(oid));
-	err = write_entry(args, oid, path.buf, path.len, mode, buffer, size);
-	free(buffer);
-	return err;
-}
-
-static void queue_directory(const unsigned char *sha1,
-		struct strbuf *base, const char *filename,
-		unsigned mode, int stage, struct archiver_context *c)
-{
-	struct directory *d;
-	size_t len = st_add4(base->len, 1, strlen(filename), 1);
-	d = xmalloc(st_add(sizeof(*d), len));
-	d->up	   = c->bottom;
-	d->baselen = base->len;
-	d->mode	   = mode;
-	d->stage   = stage;
-	c->bottom  = d;
-	d->len = xsnprintf(d->path, len, "%.*s%s/", (int)base->len, base->buf, filename);
-	hashcpy(d->oid.hash, sha1);
-}
-
-static int write_directory(struct archiver_context *c)
-{
-	struct directory *d = c->bottom;
-	int ret;
-
-	if (!d)
-		return 0;
-	c->bottom = d->up;
-	d->path[d->len - 1] = '\0'; /* no trailing slash */
-	ret =
-		write_directory(c) ||
-		write_archive_entry(&d->oid, d->path, d->baselen,
-				    d->path + d->baselen, d->mode,
-				    d->stage, c) != READ_TREE_RECURSIVE;
-	free(d);
-	return ret ? -1 : 0;
-}
-
-static int queue_or_write_archive_entry(const struct object_id *oid,
-		struct strbuf *base, const char *filename,
-		unsigned mode, int stage, void *context)
-{
-	struct archiver_context *c = context;
-
-	while (c->bottom &&
-	       !(base->len >= c->bottom->len &&
-		 !strncmp(base->buf, c->bottom->path, c->bottom->len))) {
-		struct directory *next = c->bottom->up;
-		free(c->bottom);
-		c->bottom = next;
-	}
-
-	if (S_ISDIR(mode)) {
-		size_t baselen = base->len;
-		const struct attr_check *check;
-
-		/* Borrow base, but restore its original value when done. */
-		strbuf_addstr(base, filename);
-		strbuf_addch(base, '/');
-		check = get_archive_attrs(c->args->repo->index, base->buf);
-		strbuf_setlen(base, baselen);
-
-		if (check_attr_export_ignore(check))
-			return 0;
-		queue_directory(oid->hash, base, filename,
-				mode, stage, c);
-		return READ_TREE_RECURSIVE;
-	}
-
-	if (write_directory(c))
-		return -1;
-	return write_archive_entry(oid, base->buf, base->len, filename, mode,
-				   stage, context);
-}
-
-struct extra_file_info {
-	char *base;
-	struct stat stat;
-};
-
-int write_archive_entries(struct archiver_args *args,
-		write_archive_entry_fn_t write_entry)
-{
-	struct archiver_context context;
-	struct unpack_trees_options opts;
-	struct tree_desc t;
-	int err;
-	struct strbuf path_in_archive = STRBUF_INIT;
-	struct strbuf content = STRBUF_INIT;
-	struct object_id fake_oid = null_oid;
-	int i;
-
-	if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
-		size_t len = args->baselen;
-
-		while (len > 1 && args->base[len - 2] == '/')
-			len--;
-		if (args->verbose)
-			fprintf(stderr, "%.*s\n", (int)len, args->base);
-		err = write_entry(args, &args->tree->object.oid, args->base,
-				  len, 040777, NULL, 0);
-		if (err)
-			return err;
-	}
-
-	memset(&context, 0, sizeof(context));
-	context.args = args;
-	context.write_entry = write_entry;
-
-	/*
-	 * Setup index and instruct attr to read index only
-	 */
-	if (!args->worktree_attributes) {
-		memset(&opts, 0, sizeof(opts));
-		opts.index_only = 1;
-		opts.head_idx = -1;
-		opts.src_index = args->repo->index;
-		opts.dst_index = args->repo->index;
-		opts.fn = oneway_merge;
-		init_tree_desc(&t, args->tree->buffer, args->tree->size);
-		if (unpack_trees(1, &t, &opts))
-			return -1;
-		git_attr_set_direction(GIT_ATTR_INDEX);
-	}
-
-	err = read_tree_recursive(args->repo, args->tree, "",
-				  0, 0, &args->pathspec,
-				  queue_or_write_archive_entry,
-				  &context);
-	if (err == READ_TREE_RECURSIVE)
-		err = 0;
-	while (context.bottom) {
-		struct directory *next = context.bottom->up;
-		free(context.bottom);
-		context.bottom = next;
-	}
-
-	for (i = 0; i < args->extra_files.nr; i++) {
-		struct string_list_item *item = args->extra_files.items + i;
-		char *path = item->string;
-		struct extra_file_info *info = item->util;
-
-		put_be64(fake_oid.hash, i + 1);
-
-		strbuf_reset(&path_in_archive);
-		if (info->base)
-			strbuf_addstr(&path_in_archive, info->base);
-		strbuf_addstr(&path_in_archive, basename(path));
-
-		strbuf_reset(&content);
-		if (strbuf_read_file(&content, path, info->stat.st_size) < 0)
-			err = error_errno(_("could not read '%s'"), path);
-		else
-			err = write_entry(args, &fake_oid, path_in_archive.buf,
-					  path_in_archive.len,
-					  info->stat.st_mode,
-					  content.buf, content.len);
-		if (err)
-			break;
-	}
-	strbuf_release(&path_in_archive);
-	strbuf_release(&content);
-
-	return err;
-}
-
-static const struct archiver *lookup_archiver(const char *name)
-{
-	int i;
-
-	if (!name)
-		return NULL;
-
-	for (i = 0; i < nr_archivers; i++) {
-		if (!strcmp(name, archivers[i]->name))
-			return archivers[i];
-	}
-	return NULL;
-}
-
-struct path_exists_context {
-	struct pathspec pathspec;
-	struct archiver_args *args;
-};
-
-static int reject_entry(const struct object_id *oid, struct strbuf *base,
-			const char *filename, unsigned mode,
-			int stage, void *context)
-{
-	int ret = -1;
-	struct path_exists_context *ctx = context;
-
-	if (S_ISDIR(mode)) {
-		struct strbuf sb = STRBUF_INIT;
-		strbuf_addbuf(&sb, base);
-		strbuf_addstr(&sb, filename);
-		if (!match_pathspec(ctx->args->repo->index,
-				    &ctx->pathspec,
-				    sb.buf, sb.len, 0, NULL, 1))
-			ret = READ_TREE_RECURSIVE;
-		strbuf_release(&sb);
-	}
-	return ret;
-}
-
-static int path_exists(struct archiver_args *args, const char *path)
-{
-	const char *paths[] = { path, NULL };
-	struct path_exists_context ctx;
-	int ret;
-
-	ctx.args = args;
-	parse_pathspec(&ctx.pathspec, 0, 0, "", paths);
-	ctx.pathspec.recursive = 1;
-	ret = read_tree_recursive(args->repo, args->tree, "",
-				  0, 0, &ctx.pathspec,
-				  reject_entry, &ctx);
-	clear_pathspec(&ctx.pathspec);
-	return ret != 0;
-}
-
-static void parse_pathspec_arg(const char **pathspec,
-		struct archiver_args *ar_args)
-{
-	/*
-	 * must be consistent with parse_pathspec in path_exists()
-	 * Also if pathspec patterns are dependent, we're in big
-	 * trouble as we test each one separately
-	 */
-	parse_pathspec(&ar_args->pathspec, 0,
-		       PATHSPEC_PREFER_FULL,
-		       "", pathspec);
-	ar_args->pathspec.recursive = 1;
-	if (pathspec) {
-		while (*pathspec) {
-			if (**pathspec && !path_exists(ar_args, *pathspec))
-				die(_("pathspec '%s' did not match any files"), *pathspec);
-			pathspec++;
-		}
-	}
-}
-
-static void parse_treeish_arg(const char **argv,
-		struct archiver_args *ar_args, const char *prefix,
-		int remote)
-{
-	const char *name = argv[0];
-	const struct object_id *commit_oid;
-	time_t archive_time;
-	struct tree *tree;
-	const struct commit *commit;
-	struct object_id oid;
-	char *ref = NULL;
-
-	/* Remotes are only allowed to fetch actual refs */
-	if (remote && !remote_allow_unreachable) {
-		const char *colon = strchrnul(name, ':');
-		int refnamelen = colon - name;
-
-		if (!dwim_ref(name, refnamelen, &oid, &ref, 0))
-			die(_("no such ref: %.*s"), refnamelen, name);
-	} else {
-		dwim_ref(name, strlen(name), &oid, &ref, 0);
-	}
-
-	if (get_oid(name, &oid))
-		die(_("not a valid object name: %s"), name);
-
-	commit = lookup_commit_reference_gently(ar_args->repo, &oid, 1);
-	if (commit) {
-		commit_oid = &commit->object.oid;
-		archive_time = commit->date;
-	} else {
-		commit_oid = NULL;
-		archive_time = time(NULL);
-	}
-
-	tree = parse_tree_indirect(&oid);
-	if (tree == NULL)
-		die(_("not a tree object: %s"), oid_to_hex(&oid));
-
-	if (prefix) {
-		struct object_id tree_oid;
-		unsigned short mode;
-		int err;
-
-		err = get_tree_entry(ar_args->repo,
-				     &tree->object.oid,
-				     prefix, &tree_oid,
-				     &mode);
-		if (err || !S_ISDIR(mode))
-			die(_("current working directory is untracked"));
-
-		tree = parse_tree_indirect(&tree_oid);
-	}
-	ar_args->refname = ref;
-	ar_args->tree = tree;
-	ar_args->commit_oid = commit_oid;
-	ar_args->commit = commit;
-	ar_args->time = archive_time;
-}
-
-static void extra_file_info_clear(void *util, const char *str)
-{
-	struct extra_file_info *info = util;
-	free(info->base);
-	free(info);
-}
-
-static int add_file_cb(const struct option *opt, const char *arg, int unset)
-{
-	struct archiver_args *args = opt->value;
-	const char **basep = (const char **)opt->defval;
-	const char *base = *basep;
-	char *path;
-	struct string_list_item *item;
-	struct extra_file_info *info;
-
-	if (unset) {
-		string_list_clear_func(&args->extra_files,
-				       extra_file_info_clear);
-		return 0;
-	}
-
-	if (!arg)
-		return -1;
-
-	path = prefix_filename(args->prefix, arg);
-	item = string_list_append_nodup(&args->extra_files, path);
-	item->util = info = xmalloc(sizeof(*info));
-	info->base = xstrdup_or_null(base);
-	if (stat(path, &info->stat))
-		die(_("File not found: %s"), path);
-	if (!S_ISREG(info->stat.st_mode))
-		die(_("Not a regular file: %s"), path);
-	return 0;
-}
-
-#define OPT__COMPR(s, v, h, p) \
-	OPT_SET_INT_F(s, NULL, v, h, p, PARSE_OPT_NONEG)
-#define OPT__COMPR_HIDDEN(s, v, p) \
-	OPT_SET_INT_F(s, NULL, v, "", p, PARSE_OPT_NONEG | PARSE_OPT_HIDDEN)
-
-static int parse_archive_args(int argc, const char **argv,
-		const struct archiver **ar, struct archiver_args *args,
-		const char *name_hint, int is_remote)
-{
-	const char *format = NULL;
-	const char *base = NULL;
-	const char *remote = NULL;
-	const char *exec = NULL;
-	const char *output = NULL;
-	int compression_level = -1;
-	int verbose = 0;
-	int i;
-	int list = 0;
-	int worktree_attributes = 0;
-	struct option opts[] = {
-		OPT_GROUP(""),
-		OPT_STRING(0, "format", &format, N_("fmt"), N_("archive format")),
-		OPT_STRING(0, "prefix", &base, N_("prefix"),
-			N_("prepend prefix to each pathname in the archive")),
-		{ OPTION_CALLBACK, 0, "add-file", args, N_("file"),
-		  N_("add untracked file to archive"), 0, add_file_cb,
-		  (intptr_t)&base },
-		OPT_STRING('o', "output", &output, N_("file"),
-			N_("write the archive to this file")),
-		OPT_BOOL(0, "worktree-attributes", &worktree_attributes,
-			N_("read .gitattributes in working directory")),
-		OPT__VERBOSE(&verbose, N_("report archived files on stderr")),
-		OPT__COMPR('0', &compression_level, N_("store only"), 0),
-		OPT__COMPR('1', &compression_level, N_("compress faster"), 1),
-		OPT__COMPR_HIDDEN('2', &compression_level, 2),
-		OPT__COMPR_HIDDEN('3', &compression_level, 3),
-		OPT__COMPR_HIDDEN('4', &compression_level, 4),
-		OPT__COMPR_HIDDEN('5', &compression_level, 5),
-		OPT__COMPR_HIDDEN('6', &compression_level, 6),
-		OPT__COMPR_HIDDEN('7', &compression_level, 7),
-		OPT__COMPR_HIDDEN('8', &compression_level, 8),
-		OPT__COMPR('9', &compression_level, N_("compress better"), 9),
-		OPT_GROUP(""),
-		OPT_BOOL('l', "list", &list,
-			N_("list supported archive formats")),
-		OPT_GROUP(""),
-		OPT_STRING(0, "remote", &remote, N_("repo"),
-			N_("retrieve the archive from remote repository <repo>")),
-		OPT_STRING(0, "exec", &exec, N_("command"),
-			N_("path to the remote git-upload-archive command")),
-		OPT_END()
-	};
-
-	argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);
-
-	if (remote)
-		die(_("Unexpected option --remote"));
-	if (exec)
-		die(_("Option --exec can only be used together with --remote"));
-	if (output)
-		die(_("Unexpected option --output"));
-	if (is_remote && args->extra_files.nr)
-		die(_("Options --add-file and --remote cannot be used together"));
-
-	if (!base)
-		base = "";
-
-	if (list) {
-		for (i = 0; i < nr_archivers; i++)
-			if (!is_remote || archivers[i]->flags & ARCHIVER_REMOTE)
-				printf("%s\n", archivers[i]->name);
-		exit(0);
-	}
-
-	if (!format && name_hint)
-		format = archive_format_from_filename(name_hint);
-	if (!format)
-		format = "tar";
-
-	/* We need at least one parameter -- tree-ish */
-	if (argc < 1)
-		usage_with_options(archive_usage, opts);
-	*ar = lookup_archiver(format);
-	if (!*ar || (is_remote && !((*ar)->flags & ARCHIVER_REMOTE)))
-		die(_("Unknown archive format '%s'"), format);
-
-	args->compression_level = Z_DEFAULT_COMPRESSION;
-	if (compression_level != -1) {
-		if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS)
-			args->compression_level = compression_level;
-		else {
-			die(_("Argument not supported for format '%s': -%d"),
-					format, compression_level);
-		}
-	}
-	args->verbose = verbose;
-	args->base = base;
-	args->baselen = strlen(base);
-	args->worktree_attributes = worktree_attributes;
-
-	return argc;
-}
-
-int write_archive(int argc, const char **argv, const char *prefix,
-		  struct repository *repo,
-		  const char *name_hint, int remote)
-{
-	const struct archiver *ar = NULL;
-	struct archiver_args args;
-	int rc;
-
-	git_config_get_bool("uploadarchive.allowunreachable", &remote_allow_unreachable);
-	git_config(git_default_config, NULL);
-
-	args.repo = repo;
-	args.prefix = prefix;
-	string_list_init(&args.extra_files, 1);
-	argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote);
-	if (!startup_info->have_repository) {
-		/*
-		 * We know this will die() with an error, so we could just
-		 * die ourselves; but its error message will be more specific
-		 * than what we could write here.
-		 */
-		setup_git_directory();
-	}
-
-	parse_treeish_arg(argv, &args, prefix, remote);
-	parse_pathspec_arg(argv + 1, &args);
-
-	rc = ar->write_archive(ar, &args);
-
-	string_list_clear_func(&args.extra_files, extra_file_info_clear);
-
-	return rc;
-}
-
-static int match_extension(const char *filename, const char *ext)
-{
-	int prefixlen = strlen(filename) - strlen(ext);
-
-	/*
-	 * We need 1 character for the '.', and 1 character to ensure that the
-	 * prefix is non-empty (k.e., we don't match .tar.gz with no actual
-	 * filename).
-	 */
-	if (prefixlen < 2 || filename[prefixlen - 1] != '.')
-		return 0;
-	return !strcmp(filename + prefixlen, ext);
-}
-
-const char *archive_format_from_filename(const char *filename)
-{
-	int i;
-
-	for (i = 0; i < nr_archivers; i++)
-		if (match_extension(filename, archivers[i]->name))
-			return archivers[i]->name;
-	return NULL;
-}