gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / archive.c
blobd700af3b62f35091f9c628a5a2c0d8449e2fe439
1 #include "cache.h"
2 #include "commit.h"
3 #include "tree-walk.h"
4 #include "attr.h"
5 #include "archive.h"
6 #include "parse-options.h"
7 #include "unpack-trees.h"
9 static char const * const archive_usage[] = {
10 "git archive [options] <tree-ish> [path...]",
11 "git archive --list",
12 "git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
13 "git archive --remote <repo> [--exec <cmd>] --list",
14 NULL
17 #define USES_ZLIB_COMPRESSION 1
19 static const struct archiver {
20 const char *name;
21 write_archive_fn_t write_archive;
22 unsigned int flags;
23 } archivers[] = {
24 { "tar", write_tar_archive },
25 { "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
28 static void format_subst(const struct commit *commit,
29 const char *src, size_t len,
30 struct strbuf *buf)
32 char *to_free = NULL;
33 struct strbuf fmt = STRBUF_INIT;
34 struct pretty_print_context ctx = {0};
35 ctx.date_mode = DATE_NORMAL;
37 if (src == buf->buf)
38 to_free = strbuf_detach(buf, NULL);
39 for (;;) {
40 const char *b, *c;
42 b = memmem(src, len, "$Format:", 8);
43 if (!b)
44 break;
45 c = memchr(b + 8, '$', (src + len) - b - 8);
46 if (!c)
47 break;
49 strbuf_reset(&fmt);
50 strbuf_add(&fmt, b + 8, c - b - 8);
52 strbuf_add(buf, src, b - src);
53 format_commit_message(commit, fmt.buf, buf, &ctx);
54 len -= c + 1 - src;
55 src = c + 1;
57 strbuf_add(buf, src, len);
58 strbuf_release(&fmt);
59 free(to_free);
62 static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
63 unsigned int mode, enum object_type *type,
64 unsigned long *sizep, const struct commit *commit)
66 void *buffer;
68 buffer = read_sha1_file(sha1, type, sizep);
69 if (buffer && S_ISREG(mode)) {
70 struct strbuf buf = STRBUF_INIT;
71 size_t size = 0;
73 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
74 convert_to_working_tree(path, buf.buf, buf.len, &buf);
75 if (commit)
76 format_subst(commit, buf.buf, buf.len, &buf);
77 buffer = strbuf_detach(&buf, &size);
78 *sizep = size;
81 return buffer;
84 static void setup_archive_check(struct git_attr_check *check)
86 static struct git_attr *attr_export_ignore;
87 static struct git_attr *attr_export_subst;
89 if (!attr_export_ignore) {
90 attr_export_ignore = git_attr("export-ignore");
91 attr_export_subst = git_attr("export-subst");
93 check[0].attr = attr_export_ignore;
94 check[1].attr = attr_export_subst;
97 struct archiver_context {
98 struct archiver_args *args;
99 write_archive_entry_fn_t write_entry;
102 static int write_archive_entry(const unsigned char *sha1, const char *base,
103 int baselen, const char *filename, unsigned mode, int stage,
104 void *context)
106 static struct strbuf path = STRBUF_INIT;
107 struct archiver_context *c = context;
108 struct archiver_args *args = c->args;
109 write_archive_entry_fn_t write_entry = c->write_entry;
110 struct git_attr_check check[2];
111 const char *path_without_prefix;
112 int convert = 0;
113 int err;
114 enum object_type type;
115 unsigned long size;
116 void *buffer;
118 strbuf_reset(&path);
119 strbuf_grow(&path, PATH_MAX);
120 strbuf_add(&path, args->base, args->baselen);
121 strbuf_add(&path, base, baselen);
122 strbuf_addstr(&path, filename);
123 path_without_prefix = path.buf + args->baselen;
125 setup_archive_check(check);
126 if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
127 if (ATTR_TRUE(check[0].value))
128 return 0;
129 convert = ATTR_TRUE(check[1].value);
132 if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
133 strbuf_addch(&path, '/');
134 if (args->verbose)
135 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
136 err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
137 if (err)
138 return err;
139 return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
142 buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
143 &type, &size, convert ? args->commit : NULL);
144 if (!buffer)
145 return error("cannot read %s", sha1_to_hex(sha1));
146 if (args->verbose)
147 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
148 err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
149 free(buffer);
150 return err;
153 int write_archive_entries(struct archiver_args *args,
154 write_archive_entry_fn_t write_entry)
156 struct archiver_context context;
157 struct unpack_trees_options opts;
158 struct tree_desc t;
159 int err;
161 if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
162 size_t len = args->baselen;
164 while (len > 1 && args->base[len - 2] == '/')
165 len--;
166 if (args->verbose)
167 fprintf(stderr, "%.*s\n", (int)len, args->base);
168 err = write_entry(args, args->tree->object.sha1, args->base,
169 len, 040777, NULL, 0);
170 if (err)
171 return err;
174 context.args = args;
175 context.write_entry = write_entry;
178 * Setup index and instruct attr to read index only
180 if (!args->worktree_attributes) {
181 memset(&opts, 0, sizeof(opts));
182 opts.index_only = 1;
183 opts.head_idx = -1;
184 opts.src_index = &the_index;
185 opts.dst_index = &the_index;
186 opts.fn = oneway_merge;
187 init_tree_desc(&t, args->tree->buffer, args->tree->size);
188 if (unpack_trees(1, &t, &opts))
189 return -1;
190 git_attr_set_direction(GIT_ATTR_INDEX, &the_index);
193 err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec,
194 write_archive_entry, &context);
195 if (err == READ_TREE_RECURSIVE)
196 err = 0;
197 return err;
200 static const struct archiver *lookup_archiver(const char *name)
202 int i;
204 if (!name)
205 return NULL;
207 for (i = 0; i < ARRAY_SIZE(archivers); i++) {
208 if (!strcmp(name, archivers[i].name))
209 return &archivers[i];
211 return NULL;
214 static int reject_entry(const unsigned char *sha1, const char *base,
215 int baselen, const char *filename, unsigned mode,
216 int stage, void *context)
218 return -1;
221 static int path_exists(struct tree *tree, const char *path)
223 const char *pathspec[] = { path, NULL };
225 if (read_tree_recursive(tree, "", 0, 0, pathspec, reject_entry, NULL))
226 return 1;
227 return 0;
230 static void parse_pathspec_arg(const char **pathspec,
231 struct archiver_args *ar_args)
233 ar_args->pathspec = pathspec = get_pathspec("", pathspec);
234 if (pathspec) {
235 while (*pathspec) {
236 if (!path_exists(ar_args->tree, *pathspec))
237 die("path not found: %s", *pathspec);
238 pathspec++;
243 static void parse_treeish_arg(const char **argv,
244 struct archiver_args *ar_args, const char *prefix)
246 const char *name = argv[0];
247 const unsigned char *commit_sha1;
248 time_t archive_time;
249 struct tree *tree;
250 const struct commit *commit;
251 unsigned char sha1[20];
253 if (get_sha1(name, sha1))
254 die("Not a valid object name");
256 commit = lookup_commit_reference_gently(sha1, 1);
257 if (commit) {
258 commit_sha1 = commit->object.sha1;
259 archive_time = commit->date;
260 } else {
261 commit_sha1 = NULL;
262 archive_time = time(NULL);
265 tree = parse_tree_indirect(sha1);
266 if (tree == NULL)
267 die("not a tree object");
269 if (prefix) {
270 unsigned char tree_sha1[20];
271 unsigned int mode;
272 int err;
274 err = get_tree_entry(tree->object.sha1, prefix,
275 tree_sha1, &mode);
276 if (err || !S_ISDIR(mode))
277 die("current working directory is untracked");
279 tree = parse_tree_indirect(tree_sha1);
281 ar_args->tree = tree;
282 ar_args->commit_sha1 = commit_sha1;
283 ar_args->commit = commit;
284 ar_args->time = archive_time;
287 #define OPT__COMPR(s, v, h, p) \
288 { OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
289 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
290 #define OPT__COMPR_HIDDEN(s, v, p) \
291 { OPTION_SET_INT, (s), NULL, (v), NULL, "", \
292 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }
294 static int parse_archive_args(int argc, const char **argv,
295 const struct archiver **ar, struct archiver_args *args)
297 const char *format = "tar";
298 const char *base = NULL;
299 const char *remote = NULL;
300 const char *exec = NULL;
301 const char *output = NULL;
302 int compression_level = -1;
303 int verbose = 0;
304 int i;
305 int list = 0;
306 int worktree_attributes = 0;
307 struct option opts[] = {
308 OPT_GROUP(""),
309 OPT_STRING(0, "format", &format, "fmt", "archive format"),
310 OPT_STRING(0, "prefix", &base, "prefix",
311 "prepend prefix to each pathname in the archive"),
312 OPT_STRING('o', "output", &output, "file",
313 "write the archive to this file"),
314 OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes,
315 "read .gitattributes in working directory"),
316 OPT__VERBOSE(&verbose),
317 OPT__COMPR('0', &compression_level, "store only", 0),
318 OPT__COMPR('1', &compression_level, "compress faster", 1),
319 OPT__COMPR_HIDDEN('2', &compression_level, 2),
320 OPT__COMPR_HIDDEN('3', &compression_level, 3),
321 OPT__COMPR_HIDDEN('4', &compression_level, 4),
322 OPT__COMPR_HIDDEN('5', &compression_level, 5),
323 OPT__COMPR_HIDDEN('6', &compression_level, 6),
324 OPT__COMPR_HIDDEN('7', &compression_level, 7),
325 OPT__COMPR_HIDDEN('8', &compression_level, 8),
326 OPT__COMPR('9', &compression_level, "compress better", 9),
327 OPT_GROUP(""),
328 OPT_BOOLEAN('l', "list", &list,
329 "list supported archive formats"),
330 OPT_GROUP(""),
331 OPT_STRING(0, "remote", &remote, "repo",
332 "retrieve the archive from remote repository <repo>"),
333 OPT_STRING(0, "exec", &exec, "cmd",
334 "path to the remote git-upload-archive command"),
335 OPT_END()
338 argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);
340 if (remote)
341 die("Unexpected option --remote");
342 if (exec)
343 die("Option --exec can only be used together with --remote");
344 if (output)
345 die("Unexpected option --output");
347 if (!base)
348 base = "";
350 if (list) {
351 for (i = 0; i < ARRAY_SIZE(archivers); i++)
352 printf("%s\n", archivers[i].name);
353 exit(0);
356 /* We need at least one parameter -- tree-ish */
357 if (argc < 1)
358 usage_with_options(archive_usage, opts);
359 *ar = lookup_archiver(format);
360 if (!*ar)
361 die("Unknown archive format '%s'", format);
363 args->compression_level = Z_DEFAULT_COMPRESSION;
364 if (compression_level != -1) {
365 if ((*ar)->flags & USES_ZLIB_COMPRESSION)
366 args->compression_level = compression_level;
367 else {
368 die("Argument not supported for format '%s': -%d",
369 format, compression_level);
372 args->verbose = verbose;
373 args->base = base;
374 args->baselen = strlen(base);
375 args->worktree_attributes = worktree_attributes;
377 return argc;
380 int write_archive(int argc, const char **argv, const char *prefix,
381 int setup_prefix)
383 const struct archiver *ar = NULL;
384 struct archiver_args args;
386 argc = parse_archive_args(argc, argv, &ar, &args);
387 if (setup_prefix && prefix == NULL)
388 prefix = setup_git_directory();
390 parse_treeish_arg(argv, &args, prefix);
391 parse_pathspec_arg(argv + 1, &args);
393 git_config(git_default_config, NULL);
395 return ar->write_archive(&args);