Code

t/: Replace diff [-u|-U0] with test_cmp to allow compilation with old diff
[git.git] / builtin-archive.c
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 "commit.h"
9 #include "tree-walk.h"
10 #include "pkt-line.h"
11 #include "sideband.h"
13 static const char archive_usage[] = \
14 "git archive --format=<fmt> [--prefix=<prefix>/] [--verbose] [<extra>] <tree-ish> [path...]";
16 #define USES_ZLIB_COMPRESSION 1
18 const struct archiver archivers[] = {
19         { "tar", write_tar_archive },
20         { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
21 };
23 static int run_remote_archiver(const char *remote, int argc,
24                                const char **argv)
25 {
26         char *url, buf[LARGE_PACKET_MAX];
27         int fd[2], i, len, rv;
28         struct child_process *conn;
29         const char *exec = "git-upload-archive";
30         int exec_at = 0;
32         for (i = 1; i < argc; i++) {
33                 const char *arg = argv[i];
34                 if (!prefixcmp(arg, "--exec=")) {
35                         if (exec_at)
36                                 die("multiple --exec specified");
37                         exec = arg + 7;
38                         exec_at = i;
39                         break;
40                 }
41         }
43         url = xstrdup(remote);
44         conn = git_connect(fd, url, exec, 0);
46         for (i = 1; i < argc; i++) {
47                 if (i == exec_at)
48                         continue;
49                 packet_write(fd[1], "argument %s\n", argv[i]);
50         }
51         packet_flush(fd[1]);
53         len = packet_read_line(fd[0], buf, sizeof(buf));
54         if (!len)
55                 die("git-archive: expected ACK/NAK, got EOF");
56         if (buf[len-1] == '\n')
57                 buf[--len] = 0;
58         if (strcmp(buf, "ACK")) {
59                 if (len > 5 && !prefixcmp(buf, "NACK "))
60                         die("git-archive: NACK %s", buf + 5);
61                 die("git-archive: protocol error");
62         }
64         len = packet_read_line(fd[0], buf, sizeof(buf));
65         if (len)
66                 die("git-archive: expected a flush");
68         /* Now, start reading from fd[0] and spit it out to stdout */
69         rv = recv_sideband("archive", fd[0], 1, 2);
70         close(fd[0]);
71         close(fd[1]);
72         rv |= finish_connect(conn);
74         return !!rv;
75 }
77 static const struct archiver *lookup_archiver(const char *name)
78 {
79         int i;
81         for (i = 0; i < ARRAY_SIZE(archivers); i++) {
82                 if (!strcmp(name, archivers[i].name))
83                         return &archivers[i];
84         }
85         return NULL;
86 }
88 void parse_pathspec_arg(const char **pathspec, struct archiver_args *ar_args)
89 {
90         ar_args->pathspec = get_pathspec(ar_args->base, pathspec);
91 }
93 void parse_treeish_arg(const char **argv, struct archiver_args *ar_args,
94                        const char *prefix)
95 {
96         const char *name = argv[0];
97         const unsigned char *commit_sha1;
98         time_t archive_time;
99         struct tree *tree;
100         const struct commit *commit;
101         unsigned char sha1[20];
103         if (get_sha1(name, sha1))
104                 die("Not a valid object name");
106         commit = lookup_commit_reference_gently(sha1, 1);
107         if (commit) {
108                 commit_sha1 = commit->object.sha1;
109                 archive_time = commit->date;
110         } else {
111                 commit_sha1 = NULL;
112                 archive_time = time(NULL);
113         }
115         tree = parse_tree_indirect(sha1);
116         if (tree == NULL)
117                 die("not a tree object");
119         if (prefix) {
120                 unsigned char tree_sha1[20];
121                 unsigned int mode;
122                 int err;
124                 err = get_tree_entry(tree->object.sha1, prefix,
125                                      tree_sha1, &mode);
126                 if (err || !S_ISDIR(mode))
127                         die("current working directory is untracked");
129                 tree = parse_tree_indirect(tree_sha1);
130         }
131         ar_args->tree = tree;
132         ar_args->commit_sha1 = commit_sha1;
133         ar_args->commit = commit;
134         ar_args->time = archive_time;
137 int parse_archive_args(int argc, const char **argv, const struct archiver **ar,
138                 struct archiver_args *args)
140         const char *format = "tar";
141         const char *base = "";
142         int compression_level = -1;
143         int verbose = 0;
144         int i;
146         for (i = 1; i < argc; i++) {
147                 const char *arg = argv[i];
149                 if (!strcmp(arg, "--list") || !strcmp(arg, "-l")) {
150                         for (i = 0; i < ARRAY_SIZE(archivers); i++)
151                                 printf("%s\n", archivers[i].name);
152                         exit(0);
153                 }
154                 if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
155                         verbose = 1;
156                         continue;
157                 }
158                 if (!prefixcmp(arg, "--format=")) {
159                         format = arg + 9;
160                         continue;
161                 }
162                 if (!prefixcmp(arg, "--prefix=")) {
163                         base = arg + 9;
164                         continue;
165                 }
166                 if (!strcmp(arg, "--")) {
167                         i++;
168                         break;
169                 }
170                 if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0') {
171                         compression_level = arg[1] - '0';
172                         continue;
173                 }
174                 if (arg[0] == '-')
175                         die("Unknown argument: %s", arg);
176                 break;
177         }
179         /* We need at least one parameter -- tree-ish */
180         if (argc - 1 < i)
181                 usage(archive_usage);
182         *ar = lookup_archiver(format);
183         if (!*ar)
184                 die("Unknown archive format '%s'", format);
186         args->compression_level = Z_DEFAULT_COMPRESSION;
187         if (compression_level != -1) {
188                 if ((*ar)->flags & USES_ZLIB_COMPRESSION)
189                         args->compression_level = compression_level;
190                 else {
191                         die("Argument not supported for format '%s': -%d",
192                                         format, compression_level);
193                 }
194         }
195         args->verbose = verbose;
196         args->base = base;
197         args->baselen = strlen(base);
199         return i;
202 static const char *extract_remote_arg(int *ac, const char **av)
204         int ix, iy, cnt = *ac;
205         int no_more_options = 0;
206         const char *remote = NULL;
208         for (ix = iy = 1; ix < cnt; ix++) {
209                 const char *arg = av[ix];
210                 if (!strcmp(arg, "--"))
211                         no_more_options = 1;
212                 if (!no_more_options) {
213                         if (!prefixcmp(arg, "--remote=")) {
214                                 if (remote)
215                                         die("Multiple --remote specified");
216                                 remote = arg + 9;
217                                 continue;
218                         }
219                         if (arg[0] != '-')
220                                 no_more_options = 1;
221                 }
222                 if (ix != iy)
223                         av[iy] = arg;
224                 iy++;
225         }
226         if (remote) {
227                 av[--cnt] = NULL;
228                 *ac = cnt;
229         }
230         return remote;
233 int cmd_archive(int argc, const char **argv, const char *prefix)
235         const struct archiver *ar = NULL;
236         struct archiver_args args;
237         int tree_idx;
238         const char *remote = NULL;
240         remote = extract_remote_arg(&argc, argv);
241         if (remote)
242                 return run_remote_archiver(remote, argc, argv);
244         setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
246         tree_idx = parse_archive_args(argc, argv, &ar, &args);
247         if (prefix == NULL)
248                 prefix = setup_git_directory();
250         argv += tree_idx;
251         parse_treeish_arg(argv, &args, prefix);
252         parse_pathspec_arg(argv + 1, &args);
254         return ar->write_archive(&args);