1 /*
2  * Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
3  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/queue.h>
19 
20 #include <err.h>
21 #include <errno.h>
22 #include <locale.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <unistd.h>
27 #include <libgen.h>
28 
29 #include "got_error.h"
30 #include "got_object.h"
31 #include "got_refs.h"
32 #include "got_repository.h"
33 #include "got_worktree.h"
34 
35 #ifndef nitems
36 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
37 #endif
38 
39 struct cmd {
40 	const char	 *cmd_name;
41 	const struct got_error *(*cmd_main)(int, char *[]);
42 	void		(*cmd_usage)(void);
43 	const char	 *cmd_descr;
44 };
45 
46 __dead void	usage(void);
47 __dead void	usage_checkout(void);
48 __dead void	usage_log(void);
49 
50 const struct got_error*		cmd_checkout(int, char *[]);
51 const struct got_error*		cmd_log(int, char *[]);
52 const struct got_error*		cmd_status(int, char *[]);
53 
54 struct cmd got_commands[] = {
55 	{ "checkout",	cmd_checkout,	usage_checkout,
56 	    "check out a new work tree from a repository" },
57 	{ "log",	cmd_log,	usage_log,
58 	    "show repository history" },
59 #ifdef notyet
60 	{ "status",	cmd_status,	usage_status,
61 	    "show modification status of files" },
62 #endif
63 };
64 
65 int
66 main(int argc, char *argv[])
67 {
68 	struct cmd *cmd;
69 	unsigned int i;
70 	int ch;
71 	int hflag = 0;
72 
73 	setlocale(LC_ALL, "");
74 
75 	while ((ch = getopt(argc, argv, "h")) != -1) {
76 		switch (ch) {
77 		case 'h':
78 			hflag = 1;
79 			break;
80 		default:
81 			usage();
82 			/* NOTREACHED */
83 		}
84 	}
85 
86 	argc -= optind;
87 	argv += optind;
88 
89 	if (argc <= 0)
90 		usage();
91 
92 	for (i = 0; i < nitems(got_commands); i++) {
93 		const struct got_error *error;
94 
95 		cmd = &got_commands[i];
96 
97 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
98 			continue;
99 
100 		if (hflag)
101 			got_commands[i].cmd_usage();
102 
103 		error = got_commands[i].cmd_main(argc, argv);
104 		if (error) {
105 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
106 			return 1;
107 		}
108 
109 		return 0;
110 	}
111 
112 	fprintf(stderr, "%s: unknown command '%s'\n", getprogname(), argv[0]);
113 	return 1;
114 }
115 
116 __dead void
117 usage(void)
118 {
119 	int i;
120 
121 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\n"
122 	    "Available commands:\n", getprogname());
123 	for (i = 0; i < nitems(got_commands); i++) {
124 		struct cmd *cmd = &got_commands[i];
125 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
126 	}
127 	exit(1);
128 }
129 
130 __dead void
131 usage_checkout(void)
132 {
133 	fprintf(stderr, "usage: %s checkout [-p prefix] repository-path "
134 	    "[worktree-path]\n", getprogname());
135 	exit(1);
136 }
137 
138 static void
139 checkout_progress(void *arg, const char *path)
140 {
141 	char *worktree_path = arg;
142 
143 	while (path[0] == '/')
144 		path++;
145 
146 	printf("A  %s/%s\n", worktree_path, path);
147 }
148 
149 const struct got_error *
150 cmd_checkout(int argc, char *argv[])
151 {
152 	const struct got_error *error = NULL;
153 	struct got_repository *repo = NULL;
154 	struct got_reference *head_ref = NULL;
155 	struct got_worktree *worktree = NULL;
156 	char *repo_path = NULL;
157 	char *worktree_path = NULL;
158 	const char *path_prefix = "";
159 	int ch;
160 
161 	optind = 0;
162 	while ((ch = getopt(argc, argv, "p:")) != -1) {
163 		switch (ch) {
164 		case 'p':
165 			path_prefix = optarg;
166 			break;
167 		default:
168 			usage();
169 			/* NOTREACHED */
170 		}
171 	}
172 
173 	argc -= optind;
174 	argv += optind;
175 
176 	if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
177 		err(1, "pledge");
178 
179 	if (argc == 1) {
180 		char *cwd, *base, *dotgit;
181 		repo_path = argv[0];
182 		cwd = getcwd(NULL, 0);
183 		if (cwd == NULL)
184 			err(1, "getcwd");
185 		base = basename(repo_path);
186 		if (base == NULL)
187 			err(1, "basename");
188 		dotgit = strstr(base, ".git");
189 		if (dotgit)
190 			*dotgit = '\0';
191 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
192 			free(cwd);
193 			return got_error(GOT_ERR_NO_MEM);
194 		}
195 		free(cwd);
196 	} else if (argc == 2) {
197 		repo_path = argv[0];
198 		worktree_path = strdup(argv[1]);
199 		if (worktree_path == NULL)
200 			return got_error(GOT_ERR_NO_MEM);
201 	} else
202 		usage_checkout();
203 
204 	error = got_repo_open(&repo, repo_path);
205 	if (error != NULL)
206 		goto done;
207 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
208 	if (error != NULL)
209 		goto done;
210 
211 	error = got_worktree_init(worktree_path, head_ref, path_prefix, repo);
212 	if (error != NULL)
213 		goto done;
214 
215 	error = got_worktree_open(&worktree, worktree_path);
216 	if (error != NULL)
217 		goto done;
218 
219 	error = got_worktree_checkout_files(worktree, head_ref, repo,
220 	    checkout_progress, worktree_path);
221 	if (error != NULL)
222 		goto done;
223 
224 	printf("checked out %s\n", worktree_path);
225 
226 done:
227 	free(worktree_path);
228 	return error;
229 }
230 
231 static const struct got_error *
232 print_commit_object(struct got_object *, struct got_object_id *,
233     struct got_repository *);
234 
235 static const struct got_error *
236 print_parent_commits(struct got_commit_object *commit,
237     struct got_repository *repo)
238 {
239 	struct got_parent_id *pid;
240 	const struct got_error *err = NULL;
241 	struct got_object *obj;
242 
243 	SIMPLEQ_FOREACH(pid, &commit->parent_ids, entry) {
244 		err = got_object_open(&obj, repo, pid->id);
245 		if (err != NULL)
246 			return err;
247 		if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT)
248 			return got_error(GOT_ERR_OBJ_TYPE);
249 		err = print_commit_object(obj, pid->id, repo);
250 		got_object_close(obj);
251 	}
252 
253 	return err;
254 }
255 
256 static const struct got_error *
257 print_commit_object(struct got_object *obj, struct got_object_id *id,
258     struct got_repository *repo)
259 {
260 	struct got_commit_object *commit;
261 	char *buf;
262 	const struct got_error *err;
263 
264 	err = got_object_commit_open(&commit, repo, obj);
265 	if (err)
266 		return err;
267 
268 	err = got_object_id_str(&buf, id);
269 	if (err)
270 		return err;
271 
272 	printf("-----------------------------------------------\n");
273 	printf("commit: %s\n", buf);
274 	printf("Author: %s\n", commit->author);
275 	printf("\n%s\n", commit->logmsg);
276 
277 	free(buf);
278 
279 	err = print_parent_commits(commit, repo);
280 	got_object_commit_close(commit);
281 	return err;
282 }
283 
284 __dead void
285 usage_log(void)
286 {
287 	fprintf(stderr, "usage: %s log [repository-path]\n", getprogname());
288 	exit(1);
289 }
290 
291 const struct got_error *
292 cmd_log(int argc, char *argv[])
293 {
294 	const struct got_error *error;
295 	struct got_repository *repo;
296 	struct got_reference *head_ref;
297 	struct got_object_id *id;
298 	struct got_object *obj;
299 	char *repo_path = NULL;
300 
301 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
302 		err(1, "pledge");
303 
304 	if (argc == 1) {
305 		repo_path = getcwd(NULL, 0);
306 		if (repo_path == NULL)
307 			err(1, "getcwd");
308 	} else if (argc == 2)
309 		repo_path = argv[1];
310 	else
311 		usage_log();
312 
313 	error = got_repo_open(&repo, repo_path);
314 	if (error != NULL)
315 		return error;
316 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
317 	if (error != NULL)
318 		return error;
319 	error = got_ref_resolve(&id, repo, head_ref);
320 	if (error != NULL)
321 		return error;
322 
323 	error = got_object_open(&obj, repo, id);
324 	if (error != NULL)
325 		return error;
326 	if (got_object_get_type(obj) == GOT_OBJ_TYPE_COMMIT) {
327 		error = print_commit_object(obj, id, repo);
328 		if (error)
329 			return error;
330 	} else
331 		return got_error(GOT_ERR_OBJ_TYPE);
332 	got_object_close(obj);
333 	free(id);
334 	got_ref_close(head_ref);
335 	got_repo_close(repo);
336 	return NULL;
337 }
338 
339 #ifdef notyet
340 const struct got_error *
341 cmd_status(int argc __unused, char *argv[] __unused)
342 {
343 	git_repository *repo = NULL;
344 	git_status_list *status;
345 	git_status_options statusopts;
346 	size_t i;
347 
348 	git_libgit2_init();
349 
350 	if (git_repository_open_ext(&repo, ".", 0, NULL))
351 		errx(1, "git_repository_open: %s", giterr_last()->message);
352 
353 	if (git_repository_is_bare(repo))
354 		errx(1, "bar repository");
355 
356 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
357 		errx(1, "git_status_init_options: %s", giterr_last()->message);
358 
359 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
360 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
361 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
362 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
363 
364 	if (git_status_list_new(&status, repo, &statusopts))
365 		errx(1, "git_status_list_new: %s", giterr_last()->message);
366 
367 	for (i = 0; i < git_status_list_entrycount(status); i++) {
368 		const git_status_entry *se;
369 
370 		se = git_status_byindex(status, i);
371 		switch (se->status) {
372 		case GIT_STATUS_WT_NEW:
373 			printf("? %s\n", se->index_to_workdir->new_file.path);
374 			break;
375 		case GIT_STATUS_WT_MODIFIED:
376 			printf("M %s\n", se->index_to_workdir->new_file.path);
377 			break;
378 		case GIT_STATUS_WT_DELETED:
379 			printf("R %s\n", se->index_to_workdir->new_file.path);
380 			break;
381 		case GIT_STATUS_WT_RENAMED:
382 			printf("m %s -> %s\n",
383 			    se->index_to_workdir->old_file.path,
384 			    se->index_to_workdir->new_file.path);
385 			break;
386 		case GIT_STATUS_WT_TYPECHANGE:
387 			printf("t %s\n", se->index_to_workdir->new_file.path);
388 			break;
389 		case GIT_STATUS_INDEX_NEW:
390 			printf("A %s\n", se->head_to_index->new_file.path);
391 			break;
392 		case GIT_STATUS_INDEX_MODIFIED:
393 			printf("M %s\n", se->head_to_index->old_file.path);
394 			break;
395 		case GIT_STATUS_INDEX_DELETED:
396 			printf("R %s\n", se->head_to_index->old_file.path);
397 			break;
398 		case GIT_STATUS_INDEX_RENAMED:
399 			printf("m %s -> %s\n",
400 			    se->head_to_index->old_file.path,
401 			    se->head_to_index->new_file.path);
402 			break;
403 		case GIT_STATUS_INDEX_TYPECHANGE:
404 			printf("t %s\n", se->head_to_index->old_file.path);
405 			break;
406 		case GIT_STATUS_CURRENT:
407 		default:
408 			break;
409 		}
410 	}
411 
412 	git_status_list_free(status);
413 	git_repository_free(repo);
414 	git_libgit2_shutdown();
415 
416 	return 0;
417 }
418 #endif