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 
28 #include "got_error.h"
29 #include "got_object.h"
30 #include "got_refs.h"
31 #include "got_repository.h"
32 
33 #ifndef nitems
34 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
35 #endif
36 
37 struct cmd {
38 	const char	 *cmd_name;
39 	int		(*cmd_main)(int, char *[]);
40 	void		(*cmd_usage)(void);
41 	const char	 *cmd_descr;
42 };
43 
44 __dead void	usage(void);
45 __dead void	usage_log(void);
46 
47 int		cmd_log(int, char *[]);
48 int		cmd_status(int, char *[]);
49 
50 struct cmd got_commands[] = {
51 	{ "log",	cmd_log,	usage_log,
52 	    "show repository history" },
53 #ifdef notyet
54 	{ "status",	cmd_status,	usage_status,
55 	    "show modification status of files" },
56 #endif
57 };
58 
59 int
60 main(int argc, char *argv[])
61 {
62 	struct cmd *cmd;
63 	unsigned int i;
64 	int ch;
65 	int hflag = 0;
66 
67 	setlocale(LC_ALL, "");
68 
69 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
70 		err(1, "pledge");
71 
72 	while ((ch = getopt(argc, argv, "h")) != -1) {
73 		switch (ch) {
74 		case 'h':
75 			hflag = 1;
76 			break;
77 		default:
78 			usage();
79 			/* NOTREACHED */
80 		}
81 	}
82 
83 	argc -= optind;
84 	argv += optind;
85 
86 	if (argc <= 0)
87 		usage();
88 
89 	for (i = 0; i < nitems(got_commands); i++) {
90 		cmd = &got_commands[i];
91 
92 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
93 			continue;
94 
95 		if (hflag)
96 			got_commands[i].cmd_usage();
97 
98 		return got_commands[i].cmd_main(argc, argv);
99 		/* NOTREACHED */
100 	}
101 
102 	fprintf(stderr, "%s: unknown command -- %s\n", getprogname(), argv[0]);
103 	return 1;
104 }
105 
106 __dead void
107 usage(void)
108 {
109 	int i;
110 
111 	fprintf(stderr, "usage: %s [-h] command [arg ...]\n\nAvailable commands:\n",
112 	    getprogname());
113 	for (i = 0; i < nitems(got_commands); i++) {
114 		struct cmd *cmd = &got_commands[i];
115 		fprintf(stderr, "    %s: %s\n", cmd->cmd_name, cmd->cmd_descr);
116 	}
117 	exit(1);
118 }
119 
120 static const struct got_error *
121 print_commit_object(struct got_object *, struct got_object_id *,
122     struct got_repository *);
123 
124 static const struct got_error *
125 print_parent_commits(struct got_commit_object *commit,
126     struct got_repository *repo)
127 {
128 	struct got_parent_id *pid;
129 	const struct got_error *err = NULL;
130 	struct got_object *obj;
131 
132 	SIMPLEQ_FOREACH(pid, &commit->parent_ids, entry) {
133 		err = got_object_open(&obj, repo, pid->id);
134 		if (err != NULL)
135 			return err;
136 		if (got_object_get_type(obj) != GOT_OBJ_TYPE_COMMIT)
137 			return got_error(GOT_ERR_OBJ_TYPE);
138 		err = print_commit_object(obj, pid->id, repo);
139 		got_object_close(obj);
140 	}
141 
142 	return err;
143 }
144 
145 static const struct got_error *
146 print_commit_object(struct got_object *obj, struct got_object_id *id,
147     struct got_repository *repo)
148 {
149 	struct got_commit_object *commit;
150 	char *buf;
151 	const struct got_error *err;
152 
153 	err = got_object_commit_open(&commit, repo, obj);
154 	if (err)
155 		return err;
156 
157 	err = got_object_id_str(&buf, id);
158 	if (err)
159 		return err;
160 
161 	printf("-----------------------------------------------\n");
162 	printf("commit: %s\n", buf);
163 	printf("Author: %s\n", commit->author);
164 	printf("\n%s\n", commit->logmsg);
165 
166 	free(buf);
167 
168 	err = print_parent_commits(commit, repo);
169 	got_object_commit_close(commit);
170 	return err;
171 }
172 
173 __dead void
174 usage_log(void)
175 {
176 	fprintf(stderr, "usage: %s log [REPO_PATH]\n", getprogname());
177 	exit(1);
178 }
179 
180 int
181 cmd_log(int argc, char *argv[])
182 {
183 	const struct got_error *error;
184 	struct got_repository *repo;
185 	struct got_reference *head_ref;
186 	struct got_object_id *id;
187 	struct got_object *obj;
188 	char *repo_path = NULL;
189 
190 	if (pledge("stdio rpath wpath cpath", NULL) == -1)
191 		err(1, "pledge");
192 
193 	if (argc == 1) {
194 		repo_path = getcwd(NULL, 0);
195 		if (repo_path == NULL)
196 			err(1, "getcwd");
197 	} else if (argc == 2)
198 		repo_path = argv[1];
199 	else
200 		usage_log();
201 
202 	error = got_repo_open(&repo, repo_path);
203 	if (error != NULL || repo == NULL)
204 		return 1;
205 	error = got_ref_open(&head_ref, repo, GOT_REF_HEAD);
206 	if (error != NULL || head_ref == NULL)
207 		return 1;
208 	error = got_ref_resolve(&id, repo, head_ref);
209 	if (error != NULL || head_ref == NULL)
210 		return 1;
211 
212 	error = got_object_open(&obj, repo, id);
213 	if (error != NULL || obj == NULL)
214 		return 1;
215 	if (got_object_get_type(obj) == GOT_OBJ_TYPE_COMMIT) {
216 		error = print_commit_object(obj, id, repo);
217 		if (error)
218 			return 1;
219 	} else
220 		return 1;
221 	got_object_close(obj);
222 	free(id);
223 	got_ref_close(head_ref);
224 	got_repo_close(repo);
225 	return 0;
226 }
227 
228 #ifdef notyet
229 int
230 cmd_status(int argc __unused, char *argv[] __unused)
231 {
232 	git_repository *repo = NULL;
233 	git_status_list *status;
234 	git_status_options statusopts;
235 	size_t i;
236 
237 	git_libgit2_init();
238 
239 	if (git_repository_open_ext(&repo, ".", 0, NULL))
240 		errx(1, "git_repository_open: %s", giterr_last()->message);
241 
242 	if (git_repository_is_bare(repo))
243 		errx(1, "bar repository");
244 
245 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
246 		errx(1, "git_status_init_options: %s", giterr_last()->message);
247 
248 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
249 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
250 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
251 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
252 
253 	if (git_status_list_new(&status, repo, &statusopts))
254 		errx(1, "git_status_list_new: %s", giterr_last()->message);
255 
256 	for (i = 0; i < git_status_list_entrycount(status); i++) {
257 		const git_status_entry *se;
258 
259 		se = git_status_byindex(status, i);
260 		switch (se->status) {
261 		case GIT_STATUS_WT_NEW:
262 			printf("? %s\n", se->index_to_workdir->new_file.path);
263 			break;
264 		case GIT_STATUS_WT_MODIFIED:
265 			printf("M %s\n", se->index_to_workdir->new_file.path);
266 			break;
267 		case GIT_STATUS_WT_DELETED:
268 			printf("R %s\n", se->index_to_workdir->new_file.path);
269 			break;
270 		case GIT_STATUS_WT_RENAMED:
271 			printf("m %s -> %s\n",
272 			    se->index_to_workdir->old_file.path,
273 			    se->index_to_workdir->new_file.path);
274 			break;
275 		case GIT_STATUS_WT_TYPECHANGE:
276 			printf("t %s\n", se->index_to_workdir->new_file.path);
277 			break;
278 		case GIT_STATUS_INDEX_NEW:
279 			printf("A %s\n", se->head_to_index->new_file.path);
280 			break;
281 		case GIT_STATUS_INDEX_MODIFIED:
282 			printf("M %s\n", se->head_to_index->old_file.path);
283 			break;
284 		case GIT_STATUS_INDEX_DELETED:
285 			printf("R %s\n", se->head_to_index->old_file.path);
286 			break;
287 		case GIT_STATUS_INDEX_RENAMED:
288 			printf("m %s -> %s\n",
289 			    se->head_to_index->old_file.path,
290 			    se->head_to_index->new_file.path);
291 			break;
292 		case GIT_STATUS_INDEX_TYPECHANGE:
293 			printf("t %s\n", se->head_to_index->old_file.path);
294 			break;
295 		case GIT_STATUS_CURRENT:
296 		default:
297 			break;
298 		}
299 	}
300 
301 	git_status_list_free(status);
302 	git_repository_free(repo);
303 	git_libgit2_shutdown();
304 
305 	return 0;
306 }
307 #endif