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| 1 | +/* |
| 2 | + * Copyright (c) 2006 Franck Bui-Huu |
| 3 | + * Copyright (c) 2006 Rene Scharfe |
| 4 | + */ |
| 5 | +#include <time.h> |
| 6 | +#include "cache.h" |
| 7 | +#include "builtin.h" |
| 8 | +#include "archive.h" |
| 9 | +#include "commit.h" |
| 10 | +#include "tree-walk.h" |
| 11 | +#include "exec_cmd.h" |
| 12 | +#include "pkt-line.h" |
| 13 | + |
| 14 | +static const char archive_usage[] = \ |
| 15 | +"git-archive --format=<fmt> [--prefix=<prefix>/] [<extra>] <tree-ish> [path...]"; |
| 16 | + |
| 17 | +struct archiver archivers[] = { |
| 18 | + { "" /* dummy */ }, |
| 19 | +}; |
| 20 | + |
| 21 | +static int run_remote_archiver(struct archiver *ar, int argc, |
| 22 | + const char **argv) |
| 23 | +{ |
| 24 | + char *url, buf[1024]; |
| 25 | + int fd[2], i, len, rv; |
| 26 | + pid_t pid; |
| 27 | + |
| 28 | + sprintf(buf, "git-upload-archive"); |
| 29 | + |
| 30 | + url = xstrdup(ar->remote); |
| 31 | + pid = git_connect(fd, url, buf); |
| 32 | + if (pid < 0) |
| 33 | + return pid; |
| 34 | + |
| 35 | + for (i = 1; i < argc; i++) { |
| 36 | + if (!strncmp(argv[i], "--remote=", 9)) |
| 37 | + continue; |
| 38 | + packet_write(fd[1], "argument %s\n", argv[i]); |
| 39 | + } |
| 40 | + packet_flush(fd[1]); |
| 41 | + |
| 42 | + len = packet_read_line(fd[0], buf, sizeof(buf)); |
| 43 | + if (!len) |
| 44 | + die("git-archive: expected ACK/NAK, got EOF"); |
| 45 | + if (buf[len-1] == '\n') |
| 46 | + buf[--len] = 0; |
| 47 | + if (strcmp(buf, "ACK")) { |
| 48 | + if (len > 5 && !strncmp(buf, "NACK ", 5)) |
| 49 | + die("git-archive: NACK %s", buf + 5); |
| 50 | + die("git-archive: protocol error"); |
| 51 | + } |
| 52 | + |
| 53 | + len = packet_read_line(fd[0], buf, sizeof(buf)); |
| 54 | + if (len) |
| 55 | + die("git-archive: expected a flush"); |
| 56 | + |
| 57 | + /* Now, start reading from fd[0] and spit it out to stdout */ |
| 58 | + rv = copy_fd(fd[0], 1); |
| 59 | + |
| 60 | + close(fd[0]); |
| 61 | + rv |= finish_connect(pid); |
| 62 | + |
| 63 | + return !!rv; |
| 64 | +} |
| 65 | + |
| 66 | +static int init_archiver(const char *name, struct archiver *ar) |
| 67 | +{ |
| 68 | + int rv = -1, i; |
| 69 | + |
| 70 | + for (i = 0; i < ARRAY_SIZE(archivers); i++) { |
| 71 | + if (!strcmp(name, archivers[i].name)) { |
| 72 | + memcpy(ar, &archivers[i], sizeof(struct archiver)); |
| 73 | + rv = 0; |
| 74 | + break; |
| 75 | + } |
| 76 | + } |
| 77 | + return rv; |
| 78 | +} |
| 79 | + |
| 80 | +void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args) |
| 81 | +{ |
| 82 | + ar_args->pathspec = get_pathspec(ar_args->base, pathspec); |
| 83 | +} |
| 84 | + |
| 85 | +void parse_treeish_arg(const char **argv, struct archiver_args *ar_args, |
| 86 | + const char *prefix) |
| 87 | +{ |
| 88 | + const char *name = argv[0]; |
| 89 | + const unsigned char *commit_sha1; |
| 90 | + time_t archive_time; |
| 91 | + struct tree *tree; |
| 92 | + struct commit *commit; |
| 93 | + unsigned char sha1[20]; |
| 94 | + |
| 95 | + if (get_sha1(name, sha1)) |
| 96 | + die("Not a valid object name"); |
| 97 | + |
| 98 | + commit = lookup_commit_reference_gently(sha1, 1); |
| 99 | + if (commit) { |
| 100 | + commit_sha1 = commit->object.sha1; |
| 101 | + archive_time = commit->date; |
| 102 | + } else { |
| 103 | + commit_sha1 = NULL; |
| 104 | + archive_time = time(NULL); |
| 105 | + } |
| 106 | + |
| 107 | + tree = parse_tree_indirect(sha1); |
| 108 | + if (tree == NULL) |
| 109 | + die("not a tree object"); |
| 110 | + |
| 111 | + if (prefix) { |
| 112 | + unsigned char tree_sha1[20]; |
| 113 | + unsigned int mode; |
| 114 | + int err; |
| 115 | + |
| 116 | + err = get_tree_entry(tree->object.sha1, prefix, |
| 117 | + tree_sha1, &mode); |
| 118 | + if (err || !S_ISDIR(mode)) |
| 119 | + die("current working directory is untracked"); |
| 120 | + |
| 121 | + free(tree); |
| 122 | + tree = parse_tree_indirect(tree_sha1); |
| 123 | + } |
| 124 | + ar_args->tree = tree; |
| 125 | + ar_args->commit_sha1 = commit_sha1; |
| 126 | + ar_args->time = archive_time; |
| 127 | +} |
| 128 | + |
| 129 | +static const char *default_parse_extra(struct archiver *ar, |
| 130 | + const char **argv) |
| 131 | +{ |
| 132 | + static char msg[64]; |
| 133 | + |
| 134 | + snprintf(msg, sizeof(msg) - 4, "'%s' format does not handle %s", |
| 135 | + ar->name, *argv); |
| 136 | + |
| 137 | + return strcat(msg, "..."); |
| 138 | +} |
| 139 | + |
| 140 | +int parse_archive_args(int argc, const char **argv, struct archiver *ar) |
| 141 | +{ |
| 142 | + const char *extra_argv[MAX_EXTRA_ARGS]; |
| 143 | + int extra_argc = 0; |
| 144 | + const char *format = NULL; /* might want to default to "tar" */ |
| 145 | + const char *remote = NULL; |
| 146 | + const char *base = ""; |
| 147 | + int list = 0; |
| 148 | + int i; |
| 149 | + |
| 150 | + for (i = 1; i < argc; i++) { |
| 151 | + const char *arg = argv[i]; |
| 152 | + |
| 153 | + if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) { |
| 154 | + list = 1; |
| 155 | + continue; |
| 156 | + } |
| 157 | + if (!strncmp(arg, "--format=", 9)) { |
| 158 | + format = arg + 9; |
| 159 | + continue; |
| 160 | + } |
| 161 | + if (!strncmp(arg, "--prefix=", 9)) { |
| 162 | + base = arg + 9; |
| 163 | + continue; |
| 164 | + } |
| 165 | + if (!strncmp(arg, "--remote=", 9)) { |
| 166 | + remote = arg + 9; |
| 167 | + continue; |
| 168 | + } |
| 169 | + if (!strcmp(arg, "--")) { |
| 170 | + i++; |
| 171 | + break; |
| 172 | + } |
| 173 | + if (arg[0] == '-') { |
| 174 | + if (extra_argc > MAX_EXTRA_ARGS - 1) |
| 175 | + die("Too many extra options"); |
| 176 | + extra_argv[extra_argc++] = arg; |
| 177 | + continue; |
| 178 | + } |
| 179 | + break; |
| 180 | + } |
| 181 | + |
| 182 | + if (list) { |
| 183 | + if (!remote) { |
| 184 | + for (i = 0; i < ARRAY_SIZE(archivers); i++) |
| 185 | + printf("%s\n", archivers[i].name); |
| 186 | + exit(0); |
| 187 | + } |
| 188 | + die("--list and --remote are mutually exclusive"); |
| 189 | + } |
| 190 | + |
| 191 | + if (argc - i < 1) |
| 192 | + usage(archive_usage); |
| 193 | + if (!format) |
| 194 | + die("You must specify an archive format"); |
| 195 | + if (init_archiver(format, ar) < 0) |
| 196 | + die("Unknown archive format '%s'", format); |
| 197 | + |
| 198 | + if (extra_argc && !remote) { |
| 199 | + if (!ar->parse_extra) { |
| 200 | + die("%s", default_parse_extra(ar, extra_argv)); |
| 201 | + } |
| 202 | + ar->args.extra = ar->parse_extra(extra_argc, extra_argv); |
| 203 | + } |
| 204 | + ar->remote = remote; |
| 205 | + ar->args.base = base; |
| 206 | + |
| 207 | + return i; |
| 208 | +} |
| 209 | + |
| 210 | +int cmd_archive(int argc, const char **argv, const char *prefix) |
| 211 | +{ |
| 212 | + struct archiver ar; |
| 213 | + int tree_idx; |
| 214 | + |
| 215 | + tree_idx = parse_archive_args(argc, argv, &ar); |
| 216 | + |
| 217 | + if (ar.remote) |
| 218 | + return run_remote_archiver(&ar, argc, argv); |
| 219 | + |
| 220 | + if (prefix == NULL) |
| 221 | + prefix = setup_git_directory(); |
| 222 | + |
| 223 | + argv += tree_idx; |
| 224 | + parse_treeish_arg(argv, &ar.args, prefix); |
| 225 | + parse_pathspec_arg(argv + 1, &ar.args); |
| 226 | + |
| 227 | + return ar.write_archive(&ar.args); |
| 228 | +} |
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