stagit-index.c - stagit - static git page generator
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stagit-index.c (6286B)
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1 #include <err.h>
2 #include <limits.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <string.h>
6 #include <time.h>
7 #include <unistd.h>
8
9 #include <git2.h>
10
11 static git_repository *repo;
12
13 static const char *relpath = "";
14
15 static char description[255] = "Repositories";
16 static char *name = "";
17 static char owner[255];
18
19 /* Handle read or write errors for a FILE * stream */
20 void
21 checkfileerror(FILE *fp, const char *name, int mode)
22 {
23 if (mode == 'r' && ferror(fp))
24 errx(1, "read error: %s", name);
25 else if (mode == 'w' && (fflush(fp) || ferror(fp)))
26 errx(1, "write error: %s", name);
27 }
28
29 void
30 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
31 {
32 int r;
33
34 r = snprintf(buf, bufsiz, "%s%s%s",
35 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
36 if (r < 0 || (size_t)r >= bufsiz)
37 errx(1, "path truncated: '%s%s%s'",
38 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
39 }
40
41 /* Percent-encode, see RFC3986 section 2.1. */
42 void
43 percentencode(FILE *fp, const char *s, size_t len)
44 {
45 static char tab[] = "0123456789ABCDEF";
46 unsigned char uc;
47 size_t i;
48
49 for (i = 0; *s && i < len; s++, i++) {
50 uc = *s;
51 /* NOTE: do not encode '/' for paths or ",-." */
52 if (uc < ',' || uc >= 127 || (uc >= ':' && uc <= '@') ||
53 uc == '[' || uc == ']') {
54 putc('%', fp);
55 putc(tab[(uc >> 4) & 0x0f], fp);
56 putc(tab[uc & 0x0f], fp);
57 } else {
58 putc(uc, fp);
59 }
60 }
61 }
62
63 /* Escape characters below as HTML 2.0 / XML 1.0. */
64 void
65 xmlencode(FILE *fp, const char *s, size_t len)
66 {
67 size_t i;
68
69 for (i = 0; *s && i < len; s++, i++) {
70 switch(*s) {
71 case '<': fputs("<", fp); break;
72 case '>': fputs(">", fp); break;
73 case '\'': fputs("'" , fp); break;
74 case '&': fputs("&", fp); break;
75 case '"': fputs(""", fp); break;
76 default: putc(*s, fp);
77 }
78 }
79 }
80
81 void
82 printtimeshort(FILE *fp, const git_time *intime)
83 {
84 struct tm *intm;
85 time_t t;
86 char out[32];
87
88 t = (time_t)intime->time;
89 if (!(intm = gmtime(&t)))
90 return;
91 strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
92 fputs(out, fp);
93 }
94
95 void
96 writeheader(FILE *fp)
97 {
98 fputs("<!DOCTYPE html>\n"
99 "<html>\n<head>\n"
100 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
101 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" />\n"
102 "<title>", fp);
103 xmlencode(fp, description, strlen(description));
104 fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
105 fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
106 fputs("</head>\n<body>\n", fp);
107 fprintf(fp, "<table>\n<tr><td><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></td>\n"
108 "<td><span class=\"desc\">", relpath);
109 xmlencode(fp, description, strlen(description));
110 fputs("</span></td></tr><tr><td></td><td>\n"
111 "</td></tr>\n</table>\n<hr/>\n<div id=\"content\">\n"
112 "<table id=\"index\"><thead>\n"
113 "<tr><td><b>Name</b></td><td><b>Description</b></td><td><b>Owner</b></td>"
114 "<td><b>Last commit</b></td></tr>"
115 "</thead><tbody>\n", fp);
116 }
117
118 void
119 writefooter(FILE *fp)
120 {
121 fputs("</tbody>\n</table>\n</div>\n</body>\n</html>\n", fp);
122 }
123
124 int
125 writelog(FILE *fp)
126 {
127 git_commit *commit = NULL;
128 const git_signature *author;
129 git_revwalk *w = NULL;
130 git_oid id;
131 char *stripped_name = NULL, *p;
132 int ret = 0;
133
134 git_revwalk_new(&w, repo);
135 git_revwalk_push_head(w);
136
137 if (git_revwalk_next(&id, w) ||
138 git_commit_lookup(&commit, repo, &id)) {
139 ret = -1;
140 goto err;
141 }
142
143 author = git_commit_author(commit);
144
145 /* strip .git suffix */
146 if (!(stripped_name = strdup(name)))
147 err(1, "strdup");
148 if ((p = strrchr(stripped_name, '.')))
149 if (!strcmp(p, ".git"))
150 *p = '\0';
151
152 fputs("<tr><td><a href=\"", fp);
153 percentencode(fp, stripped_name, strlen(stripped_name));
154 fputs("/log.html\">", fp);
155 xmlencode(fp, stripped_name, strlen(stripped_name));
156 fputs("</a></td><td>", fp);
157 xmlencode(fp, description, strlen(description));
158 fputs("</td><td>", fp);
159 xmlencode(fp, owner, strlen(owner));
160 fputs("</td><td>", fp);
161 if (author)
162 printtimeshort(fp, &(author->when));
163 fputs("</td></tr>", fp);
164
165 git_commit_free(commit);
166 err:
167 git_revwalk_free(w);
168 free(stripped_name);
169
170 return ret;
171 }
172
173 int
174 main(int argc, char *argv[])
175 {
176 FILE *fp;
177 char path[PATH_MAX], repodirabs[PATH_MAX + 1];
178 const char *repodir;
179 int i, ret = 0;
180
181 if (argc < 2) {
182 fprintf(stderr, "usage: %s [repodir...]\n", argv[0]);
183 return 1;
184 }
185
186 /* do not search outside the git repository:
187 GIT_CONFIG_LEVEL_APP is the highest level currently */
188 git_libgit2_init();
189 for (i = 1; i <= GIT_CONFIG_LEVEL_APP; i++)
190 git_libgit2_opts(GIT_OPT_SET_SEARCH_PATH, i, "");
191 /* do not require the git repository to be owned by the current user */
192 git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
193
194 #ifdef __OpenBSD__
195 if (pledge("stdio rpath", NULL) == -1)
196 err(1, "pledge");
197 #endif
198
199 writeheader(stdout);
200
201 for (i = 1; i < argc; i++) {
202 repodir = argv[i];
203 if (!realpath(repodir, repodirabs))
204 err(1, "realpath");
205
206 if (git_repository_open_ext(&repo, repodir,
207 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) {
208 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
209 ret = 1;
210 continue;
211 }
212
213 /* use directory name as name */
214 if ((name = strrchr(repodirabs, '/')))
215 name++;
216 else
217 name = "";
218
219 /* read description or .git/description */
220 joinpath(path, sizeof(path), repodir, "description");
221 if (!(fp = fopen(path, "r"))) {
222 joinpath(path, sizeof(path), repodir, ".git/description");
223 fp = fopen(path, "r");
224 }
225 description[0] = '\0';
226 if (fp) {
227 if (!fgets(description, sizeof(description), fp))
228 description[0] = '\0';
229 checkfileerror(fp, "description", 'r');
230 fclose(fp);
231 }
232
233 /* read owner or .git/owner */
234 joinpath(path, sizeof(path), repodir, "owner");
235 if (!(fp = fopen(path, "r"))) {
236 joinpath(path, sizeof(path), repodir, ".git/owner");
237 fp = fopen(path, "r");
238 }
239 owner[0] = '\0';
240 if (fp) {
241 if (!fgets(owner, sizeof(owner), fp))
242 owner[0] = '\0';
243 checkfileerror(fp, "owner", 'r');
244 fclose(fp);
245 owner[strcspn(owner, "\n")] = '\0';
246 }
247 writelog(stdout);
248 }
249 writefooter(stdout);
250
251 /* cleanup */
252 git_repository_free(repo);
253 git_libgit2_shutdown();
254
255 checkfileerror(stdout, "<stdout>", 'w');
256
257 return ret;
258 }