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 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 REPO_PATH [WORKTREE_PATH]\n",
134 	    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 
159 	if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
160 		err(1, "pledge");
161 
162 	if (argc == 2) {
163 		char *cwd, *base, *dotgit;
164 		repo_path = argv[1];
165 		cwd = getcwd(NULL, 0);
166 		if (cwd == NULL)
167 			err(1, "getcwd");
168 		base = basename(repo_path);
169 		if (base == NULL)
170 			err(1, "basename");
171 		dotgit = strstr(base, ".git");
172 		if (dotgit)
173 			*dotgit = '\0';
174 		if (asprintf(&worktree_path, "%s/%s", cwd, base) == -1) {
175 			free(cwd);
176 			return got_error(GOT_ERR_NO_MEM);
177 		}
178 		free(cwd);
179 	} else if (argc == 3) {
180 		repo_path = argv[1];
181 		worktree_path = strdup(argv[2]);
182 		if (worktree_path == NULL)
183 			return got_error(GOT_ERR_NO_MEM);
184 	} else
185 		usage_checkout();
186 
187 	error = got_repo_open(&repo, repo_path);
188 	if (error != NULL)
189 		goto done;
190 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
191 	if (error != NULL)
192 		goto done;
193 
194 	error = got_worktree_init(worktree_path, head_ref, "/", repo);
195 	if (error != NULL)
196 		goto done;
197 
198 	error = got_worktree_open(&worktree, worktree_path);
199 	if (error != NULL)
200 		goto done;
201 
202 	error = got_worktree_checkout_files(worktree, head_ref, repo,
203 	    checkout_progress, worktree_path);
204 	if (error != NULL)
205 		goto done;
206 
207 	printf("checked out %s\n", worktree_path);
208 
209 done:
210 	free(worktree_path);
211 	return error;
212 }
213 
214 static const struct got_error *
215 print_commit_object(struct got_object *, struct got_object_id *,
216     struct got_repository *);
217 
218 static const struct got_error *
219 print_parent_commits(struct got_commit_object *commit,
220     struct got_repository *repo)
221 {
222 	struct got_parent_id *pid;
223 	const struct got_error *err = NULL;
224 	struct got_object *obj;
225 
226 	SIMPLEQ_FOREACH(pid, &commit->parent_ids, entry) {
227 		err = got_object_open(&obj, repo, pid->id);
228 		if (err != NULL)
229 			return err;
230 		if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT)
231 			return got_error(GOT_ERR_OBJ_TYPE);
232 		err = print_commit_object(obj, pid->id, repo);
233 		got_object_close(obj);
234 	}
235 
236 	return err;
237 }
238 
239 static const struct got_error *
240 print_commit_object(struct got_object *obj, struct got_object_id *id,
241     struct got_repository *repo)
242 {
243 	struct got_commit_object *commit;
244 	char *buf;
245 	const struct got_error *err;
246 
247 	err = got_object_commit_open(&commit, repo, obj);
248 	if (err)
249 		return err;
250 
251 	err = got_object_id_str(&buf, id);
252 	if (err)
253 		return err;
254 
255 	printf("-----------------------------------------------\n");
256 	printf("commit: %s\n", buf);
257 	printf("Author: %s\n", commit->author);
258 	printf("\n%s\n", commit->logmsg);
259 
260 	free(buf);
261 
262 	err = print_parent_commits(commit, repo);
263 	got_object_commit_close(commit);
264 	return err;
265 }
266 
267 __dead void
268 usage_log(void)
269 {
270 	fprintf(stderr, "usage: %s log [REPO_PATH]\n", getprogname());
271 	exit(1);
272 }
273 
274 const struct got_error *
275 cmd_log(int argc, char *argv[])
276 {
277 	const struct got_error *error;
278 	struct got_repository *repo;
279 	struct got_reference *head_ref;
280 	struct got_object_id *id;
281 	struct got_object *obj;
282 	char *repo_path = NULL;
283 
284 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
285 		err(1, "pledge");
286 
287 	if (argc == 1) {
288 		repo_path = getcwd(NULL, 0);
289 		if (repo_path == NULL)
290 			err(1, "getcwd");
291 	} else if (argc == 2)
292 		repo_path = argv[1];
293 	else
294 		usage_log();
295 
296 	error = got_repo_open(&repo, repo_path);
297 	if (error != NULL)
298 		return error;
299 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
300 	if (error != NULL)
301 		return error;
302 	error = got_ref_resolve(&id, repo, head_ref);
303 	if (error != NULL)
304 		return error;
305 
306 	error = got_object_open(&obj, repo, id);
307 	if (error != NULL)
308 		return error;
309 	if (got_object_get_type(obj) == GOT_OBJ_TYPE_COMMIT) {
310 		error = print_commit_object(obj, id, repo);
311 		if (error)
312 			return error;
313 	} else
314 		return got_error(GOT_ERR_OBJ_TYPE);
315 	got_object_close(obj);
316 	free(id);
317 	got_ref_close(head_ref);
318 	got_repo_close(repo);
319 	return NULL;
320 }
321 
322 #ifdef notyet
323 const struct got_error *
324 cmd_status(int argc __unused, char *argv[] __unused)
325 {
326 	git_repository *repo = NULL;
327 	git_status_list *status;
328 	git_status_options statusopts;
329 	size_t i;
330 
331 	git_libgit2_init();
332 
333 	if (git_repository_open_ext(&repo, ".", 0, NULL))
334 		errx(1, "git_repository_open: %s", giterr_last()->message);
335 
336 	if (git_repository_is_bare(repo))
337 		errx(1, "bar repository");
338 
339 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
340 		errx(1, "git_status_init_options: %s", giterr_last()->message);
341 
342 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
343 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
344 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
345 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
346 
347 	if (git_status_list_new(&status, repo, &statusopts))
348 		errx(1, "git_status_list_new: %s", giterr_last()->message);
349 
350 	for (i = 0; i < git_status_list_entrycount(status); i++) {
351 		const git_status_entry *se;
352 
353 		se = git_status_byindex(status, i);
354 		switch (se->status) {
355 		case GIT_STATUS_WT_NEW:
356 			printf("? %s\n", se->index_to_workdir->new_file.path);
357 			break;
358 		case GIT_STATUS_WT_MODIFIED:
359 			printf("M %s\n", se->index_to_workdir->new_file.path);
360 			break;
361 		case GIT_STATUS_WT_DELETED:
362 			printf("R %s\n", se->index_to_workdir->new_file.path);
363 			break;
364 		case GIT_STATUS_WT_RENAMED:
365 			printf("m %s -> %s\n",
366 			    se->index_to_workdir->old_file.path,
367 			    se->index_to_workdir->new_file.path);
368 			break;
369 		case GIT_STATUS_WT_TYPECHANGE:
370 			printf("t %s\n", se->index_to_workdir->new_file.path);
371 			break;
372 		case GIT_STATUS_INDEX_NEW:
373 			printf("A %s\n", se->head_to_index->new_file.path);
374 			break;
375 		case GIT_STATUS_INDEX_MODIFIED:
376 			printf("M %s\n", se->head_to_index->old_file.path);
377 			break;
378 		case GIT_STATUS_INDEX_DELETED:
379 			printf("R %s\n", se->head_to_index->old_file.path);
380 			break;
381 		case GIT_STATUS_INDEX_RENAMED:
382 			printf("m %s -> %s\n",
383 			    se->head_to_index->old_file.path,
384 			    se->head_to_index->new_file.path);
385 			break;
386 		case GIT_STATUS_INDEX_TYPECHANGE:
387 			printf("t %s\n", se->head_to_index->old_file.path);
388 			break;
389 		case GIT_STATUS_CURRENT:
390 		default:
391 			break;
392 		}
393 	}
394 
395 	git_status_list_free(status);
396 	git_repository_free(repo);
397 	git_libgit2_shutdown();
398 
399 	return 0;
400 }
401 #endif