1 /*
2  * Copyright (c) 2017 Martin Pieuchot
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <err.h>
18 #include <errno.h>
19 #include <locale.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <unistd.h>
24 
25 #include <git2.h>
26 
27 #ifndef nitems
28 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
29 #endif
30 
31 struct cmd {
32 	const char	 *cmd_name;
33 	int		(*cmd_main)(int, char *[]);
34 };
35 
36 __dead void	usage(void);
37 
38 int		cmd_log(int, char *[]);
39 int		cmd_status(int, char *[]);
40 
41 struct cmd got_commands[] = {
42 	{ "log",	cmd_log },
43 	{ "status",	cmd_status },
44 };
45 
46 int
47 main(int argc, char *argv[])
48 {
49 	struct cmd *cmd;
50 	unsigned int i;
51 	int ch;
52 
53 	setlocale(LC_ALL, "");
54 
55 	if (pledge("stdio rpath", NULL) == -1)
56 		err(1, "pledge");
57 
58 	while ((ch = getopt(argc, argv, "")) != -1) {
59 		switch (ch) {
60 		default:
61 			usage();
62 			/* NOTREACHED */
63 		}
64 	}
65 
66 	argc -= optind;
67 	argv += optind;
68 
69 	if (argc <= 0)
70 		usage();
71 
72 	for (i = 0; i < nitems(got_commands); i++) {
73 		cmd = &got_commands[i];
74 
75 		if (strncmp(cmd->cmd_name, argv[0], strlen(argv[0])))
76 			continue;
77 
78 		return got_commands[i].cmd_main(argc, argv);
79 		/* NOTREACHED */
80 	}
81 
82 	fprintf(stderr, "%s: unknown command -- %s\n", getprogname(), argv[0]);
83 	return 1;
84 }
85 
86 __dead void
87 usage(void)
88 {
89 	fprintf(stderr, "usage: %s command [arg ...]\n", getprogname());
90 	exit(1);
91 }
92 
93 int
94 cmd_log(int argc __unused, char *argv[] __unused)
95 {
96 	git_repository *repo = NULL;
97 	git_revwalk *walker = NULL;
98 	git_commit *commit = NULL;
99 	git_oid oid;
100 
101 	git_libgit2_init();
102 
103 	if (git_repository_open_ext(&repo, ".", 0, NULL))
104 		errx(1, "git_repository_open: %s", giterr_last()->message);
105 
106 	if (git_revwalk_new(&walker, repo))
107 		errx(1, "git_revwalk_new: %s", giterr_last()->message);
108 
109 	if (git_revwalk_push_head(walker))
110 		errx(1, "git_revwalk_push_head: %s", giterr_last()->message);
111 
112 	while (git_revwalk_next(&oid, walker) == 0) {
113 		char buf[GIT_OID_HEXSZ + 1];
114 		const git_signature *sig;
115 
116 		git_commit_free(commit);
117 		if (git_commit_lookup(&commit, repo, &oid))
118 			errx(1, "git_commit_lookup: %s", giterr_last()->message);
119 
120 		printf("-----------------------------------------------\n");
121 		git_oid_tostr(buf, sizeof(buf), git_commit_id(commit));
122 		printf("commit %s\n", buf);
123 
124 		if ((sig = git_commit_author(commit)) != NULL) {
125 			printf("Author: %s <%s>\n", sig->name, sig->email);
126 		}
127 		printf("\n%s\n", git_commit_message_raw(commit));
128 	}
129 	git_commit_free(commit);
130 
131 	git_repository_free(repo);
132 	git_libgit2_shutdown();
133 
134 	return 0;
135 }
136 
137 int
138 cmd_status(int argc __unused, char *argv[] __unused)
139 {
140 	git_repository *repo = NULL;
141 	git_status_list *status;
142 	git_status_options statusopts;
143 	size_t i;
144 
145 	git_libgit2_init();
146 
147 	if (git_repository_open_ext(&repo, ".", 0, NULL))
148 		errx(1, "git_repository_open: %s", giterr_last()->message);
149 
150 	if (git_repository_is_bare(repo))
151 		errx(1, "bar repository");
152 
153 	if (git_status_init_options(&statusopts, GIT_STATUS_OPTIONS_VERSION))
154 		errx(1, "git_status_init_options: %s", giterr_last()->message);
155 
156 	statusopts.show  = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
157 	statusopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
158 	    GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
159 	    GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
160 
161 	if (git_status_list_new(&status, repo, &statusopts))
162 		errx(1, "git_status_list_new: %s", giterr_last()->message);
163 
164 	for (i = 0; i < git_status_list_entrycount(status); i++) {
165 		const git_status_entry *se;
166 
167 		se = git_status_byindex(status, i);
168 		switch (se->status) {
169 		case GIT_STATUS_WT_NEW:
170 			printf("? %s\n", se->index_to_workdir->new_file.path);
171 			break;
172 		case GIT_STATUS_WT_MODIFIED:
173 			printf("M %s\n", se->index_to_workdir->new_file.path);
174 			break;
175 		case GIT_STATUS_WT_DELETED:
176 			printf("R %s\n", se->index_to_workdir->new_file.path);
177 			break;
178 		case GIT_STATUS_WT_RENAMED:
179 			printf("m %s -> %s\n",
180 			    se->index_to_workdir->old_file.path,
181 			    se->index_to_workdir->new_file.path);
182 			break;
183 		case GIT_STATUS_WT_TYPECHANGE:
184 			printf("t %s\n", se->index_to_workdir->new_file.path);
185 			break;
186 		case GIT_STATUS_INDEX_NEW:
187 			printf("A %s\n", se->head_to_index->new_file.path);
188 			break;
189 		case GIT_STATUS_INDEX_MODIFIED:
190 			printf("M %s\n", se->head_to_index->old_file.path);
191 			break;
192 		case GIT_STATUS_INDEX_DELETED:
193 			printf("R %s\n", se->head_to_index->old_file.path);
194 			break;
195 		case GIT_STATUS_INDEX_RENAMED:
196 			printf("m %s -> %s\n",
197 			    se->head_to_index->old_file.path,
198 			    se->head_to_index->new_file.path);
199 			break;
200 		case GIT_STATUS_INDEX_TYPECHANGE:
201 			printf("t %s\n", se->head_to_index->old_file.path);
202 			break;
203 		case GIT_STATUS_CURRENT:
204 		default:
205 			break;
206 		}
207 	}
208 
209 	git_status_list_free(status);
210 	git_repository_free(repo);
211 	git_libgit2_shutdown();
212 
213 	return 0;
214 }