git

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/*
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 * Copyright (c) 2006 Franck Bui-Huu
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 * Copyright (c) 2006 Rene Scharfe
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 */
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#include "builtin.h"
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#include "archive.h"
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#include "gettext.h"
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#include "transport.h"
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#include "parse-options.h"
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#include "pkt-line.h"
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#include "repository.h"
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static void create_output_file(const char *output_file)
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{
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	int output_fd = xopen(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
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	if (output_fd != 1) {
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		if (dup2(output_fd, 1) < 0)
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			die_errno(_("could not redirect output"));
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		else
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			close(output_fd);
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	}
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}
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static int run_remote_archiver(int argc, const char **argv,
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			       const char *remote, const char *exec,
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			       const char *name_hint)
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{
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	int fd[2], i, rv;
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	struct transport *transport;
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	struct remote *_remote;
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	struct packet_reader reader;
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	_remote = remote_get(remote);
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	transport = transport_get(_remote, _remote->url.v[0]);
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	transport_connect(transport, "git-upload-archive", exec, fd);
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	/*
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	 * Inject a fake --format field at the beginning of the
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	 * arguments, with the format inferred from our output
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	 * filename. This way explicit --format options can override
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	 * it.
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	 */
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	if (name_hint) {
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		const char *format = archive_format_from_filename(name_hint);
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		if (format)
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			packet_write_fmt(fd[1], "argument --format=%s\n", format);
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	}
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	for (i = 1; i < argc; i++)
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		packet_write_fmt(fd[1], "argument %s\n", argv[i]);
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	packet_flush(fd[1]);
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	packet_reader_init(&reader, fd[0], NULL, 0,
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			   PACKET_READ_CHOMP_NEWLINE |
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			   PACKET_READ_DIE_ON_ERR_PACKET);
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	if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
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		die(_("git archive: expected ACK/NAK, got a flush packet"));
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	if (strcmp(reader.line, "ACK")) {
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		if (starts_with(reader.line, "NACK "))
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			die(_("git archive: NACK %s"), reader.line + 5);
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		die(_("git archive: protocol error"));
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	}
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	if (packet_reader_read(&reader) != PACKET_READ_FLUSH)
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		die(_("git archive: expected a flush"));
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	/* Now, start reading from fd[0] and spit it out to stdout */
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	rv = recv_sideband("archive", fd[0], 1);
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	rv |= transport_disconnect(transport);
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	return !!rv;
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}
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#define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH | 	\
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			     PARSE_OPT_KEEP_ARGV0 | 	\
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			     PARSE_OPT_KEEP_UNKNOWN_OPT |	\
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			     PARSE_OPT_NO_INTERNAL_HELP	)
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int cmd_archive(int argc, const char **argv, const char *prefix)
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{
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	const char *exec = "git-upload-archive";
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	char *output = NULL;
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	const char *remote = NULL;
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	struct option local_opts[] = {
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		OPT_FILENAME('o', "output", &output,
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			     N_("write the archive to this file")),
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		OPT_STRING(0, "remote", &remote, N_("repo"),
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			N_("retrieve the archive from remote repository <repo>")),
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		OPT_STRING(0, "exec", &exec, N_("command"),
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			N_("path to the remote git-upload-archive command")),
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		OPT_END()
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	};
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	int ret;
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	argc = parse_options(argc, argv, prefix, local_opts, NULL,
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			     PARSE_OPT_KEEP_ALL);
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	init_archivers();
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	if (output)
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		create_output_file(output);
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	if (remote)
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		return run_remote_archiver(argc, argv, remote, exec, output);
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	setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
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	ret = write_archive(argc, argv, prefix, the_repository, output, 0);
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	free(output);
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	return ret;
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}
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