Andrew's git - gitweb.git/blob

   1/*
   2 * Copyright (c) 2006 Franck Bui-Huu
   3 * Copyright (c) 2006 Rene Scharfe
   4 */
   5#include "cache.h"
   6#include "builtin.h"
   7#include "archive.h"
   8#include "transport.h"
   9#include "parse-options.h"
  10#include "pkt-line.h"
  11#include "sideband.h"
  12
  13static void create_output_file(const char *output_file)
  14{
  15        int output_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
  16        if (output_fd < 0)
  17                die_errno(_("could not create archive file '%s'"), output_file);
  18        if (output_fd != 1) {
  19                if (dup2(output_fd, 1) < 0)
  20                        die_errno(_("could not redirect output"));
  21                else
  22                        close(output_fd);
  23        }
  24}
  25
  26static int run_remote_archiver(int argc, const char **argv,
  27                               const char *remote, const char *exec,
  28                               const char *name_hint)
  29{
  30        char buf[LARGE_PACKET_MAX];
  31        int fd[2], i, len, rv;
  32        struct transport *transport;
  33        struct remote *_remote;
  34
  35        _remote = remote_get(remote);
  36        if (!_remote->url[0])
  37                die(_("git archive: Remote with no URL"));
  38        transport = transport_get(_remote, _remote->url[0]);
  39        transport_connect(transport, "git-upload-archive", exec, fd);
  40
  41        /*
  42         * Inject a fake --format field at the beginning of the
  43         * arguments, with the format inferred from our output
  44         * filename. This way explicit --format options can override
  45         * it.
  46         */
  47        if (name_hint) {
  48                const char *format = archive_format_from_filename(name_hint);
  49                if (format)
  50                        packet_write(fd[1], "argument --format=%s\n", format);
  51        }
  52        for (i = 1; i < argc; i++)
  53                packet_write(fd[1], "argument %s\n", argv[i]);
  54        packet_flush(fd[1]);
  55
  56        len = packet_read_line(fd[0], buf, sizeof(buf));
  57        if (!len)
  58                die(_("git archive: expected ACK/NAK, got EOF"));
  59        if (buf[len-1] == '\n')
  60                buf[--len] = 0;
  61        if (strcmp(buf, "ACK")) {
  62                if (len > 5 && !prefixcmp(buf, "NACK "))
  63                        die(_("git archive: NACK %s"), buf + 5);
  64                die(_("git archive: protocol error"));
  65        }
  66
  67        len = packet_read_line(fd[0], buf, sizeof(buf));
  68        if (len)
  69                die(_("git archive: expected a flush"));
  70
  71        /* Now, start reading from fd[0] and spit it out to stdout */
  72        rv = recv_sideband("archive", fd[0], 1);
  73        rv |= transport_disconnect(transport);
  74
  75        return !!rv;
  76}
  77
  78#define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH |  \
  79                             PARSE_OPT_KEEP_ARGV0 |     \
  80                             PARSE_OPT_KEEP_UNKNOWN |   \
  81                             PARSE_OPT_NO_INTERNAL_HELP )
  82
  83int cmd_archive(int argc, const char **argv, const char *prefix)
  84{
  85        const char *exec = "git-upload-archive";
  86        const char *output = NULL;
  87        const char *remote = NULL;
  88        struct option local_opts[] = {
  89                OPT_STRING('o', "output", &output, "file",
  90                        "write the archive to this file"),
  91                OPT_STRING(0, "remote", &remote, "repo",
  92                        "retrieve the archive from remote repository <repo>"),
  93                OPT_STRING(0, "exec", &exec, "cmd",
  94                        "path to the remote git-upload-archive command"),
  95                OPT_END()
  96        };
  97
  98        argc = parse_options(argc, argv, prefix, local_opts, NULL,
  99                             PARSE_OPT_KEEP_ALL);
 100
 101        if (output)
 102                create_output_file(output);
 103
 104        if (remote)
 105                return run_remote_archiver(argc, argv, remote, exec, output);
 106
 107        setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
 108
 109        return write_archive(argc, argv, prefix, 1, output, 0);
 110}