stagit-gopher-index.c (5418B)
1 #include <err.h> 2 #include <locale.h> 3 #include <limits.h> 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <string.h> 7 #include <time.h> 8 #include <unistd.h> 9 #include <wchar.h> 10 11 #include <git2.h> 12 13 static git_repository *repo; 14 15 static const char *relpath = ""; 16 17 static char description[255] = "Repositories"; 18 static char *name = ""; 19 20 /* format `len' columns of characters. If string is shorter pad the rest 21 * with characters `pad`. */ 22 int 23 utf8pad(char *buf, size_t bufsiz, const char *s, size_t len, int pad) 24 { 25 wchar_t w; 26 size_t col = 0, i, slen, siz = 0; 27 int rl, wc; 28 29 if (!len) 30 return -1; 31 32 slen = strlen(s); 33 for (i = 0; i < slen && col < len + 1; i += rl) { 34 if ((rl = mbtowc(&w, &s[i], slen - i < 4 ? slen - i : 4)) <= 0) 35 break; 36 if ((wc = wcwidth(w)) == -1) 37 wc = 1; 38 col += wc; 39 if (col >= len && s[i + rl]) { 40 if (siz + 4 >= bufsiz) 41 return -1; 42 memcpy(&buf[siz], "\xe2\x80\xa6", 4); 43 return 0; 44 } 45 if (siz + rl + 1 >= bufsiz) 46 return -1; 47 memcpy(&buf[siz], &s[i], rl); 48 siz += rl; 49 buf[siz] = '\0'; 50 } 51 52 len -= col; 53 if (siz + len + 1 >= bufsiz) 54 return -1; 55 memset(&buf[siz], pad, len); 56 siz += len; 57 buf[siz] = '\0'; 58 59 return 0; 60 } 61 62 /* Escape characters in text in geomyidae .gph format, 63 newlines are ignored */ 64 void 65 gphtext(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 '\r': /* ignore CR */ 72 case '\n': /* ignore LF */ 73 break; 74 case '\t': 75 fputs(" ", fp); 76 break; 77 default: 78 fputc(*s, fp); 79 break; 80 } 81 } 82 } 83 84 /* Escape characters in links in geomyidae .gph format */ 85 void 86 gphlink(FILE *fp, const char *s, size_t len) 87 { 88 size_t i; 89 90 for (i = 0; *s && i < len; s++, i++) { 91 switch (*s) { 92 case '\r': /* ignore CR */ 93 case '\n': /* ignore LF */ 94 break; 95 case '\t': 96 fputs(" ", fp); 97 break; 98 case '|': /* escape separators */ 99 fputs("\\|", fp); 100 break; 101 default: 102 fputc(*s, fp); 103 break; 104 } 105 } 106 } 107 108 void 109 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2) 110 { 111 int r; 112 113 r = snprintf(buf, bufsiz, "%s%s%s", 114 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2); 115 if (r < 0 || (size_t)r >= bufsiz) 116 errx(1, "path truncated: '%s%s%s'", 117 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2); 118 } 119 120 void 121 printtimeshort(FILE *fp, const git_time *intime) 122 { 123 struct tm *intm; 124 time_t t; 125 char out[32]; 126 127 t = (time_t)intime->time; 128 if (!(intm = gmtime(&t))) 129 return; 130 strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm); 131 fputs(out, fp); 132 } 133 134 void 135 writeheader(FILE *fp) 136 { 137 if (description[0]) { 138 putchar('t'); 139 gphtext(fp, description, strlen(description)); 140 fputs("\n\n", fp); 141 } 142 143 fprintf(fp, "%-20.20s ", "Name"); 144 fprintf(fp, "%-39.39s ", "Description"); 145 fprintf(fp, "%s\n", "Last commit"); 146 } 147 148 int 149 writelog(FILE *fp) 150 { 151 git_commit *commit = NULL; 152 const git_signature *author; 153 git_revwalk *w = NULL; 154 git_oid id; 155 char *stripped_name = NULL, *p; 156 char buf[1024]; 157 int ret = 0; 158 159 git_revwalk_new(&w, repo); 160 git_revwalk_push_head(w); 161 git_revwalk_simplify_first_parent(w); 162 163 if (git_revwalk_next(&id, w) || 164 git_commit_lookup(&commit, repo, &id)) { 165 ret = -1; 166 goto err; 167 } 168 169 author = git_commit_author(commit); 170 171 /* strip .git suffix */ 172 if (!(stripped_name = strdup(name))) 173 err(1, "strdup"); 174 if ((p = strrchr(stripped_name, '.'))) 175 if (!strcmp(p, ".git")) 176 *p = '\0'; 177 178 fputs("[1|", fp); 179 utf8pad(buf, sizeof(buf), stripped_name, 20, ' '); 180 gphlink(fp, buf, strlen(buf)); 181 fputs(" ", fp); 182 utf8pad(buf, sizeof(buf), description, 39, ' '); 183 gphlink(fp, buf, strlen(buf)); 184 fputs(" ", fp); 185 if (author) 186 printtimeshort(fp, &(author->when)); 187 fprintf(fp, "|%s/%s/log.gph|server|port]\n", relpath, stripped_name); 188 189 git_commit_free(commit); 190 err: 191 git_revwalk_free(w); 192 free(stripped_name); 193 194 return ret; 195 } 196 197 void 198 usage(const char *argv0) 199 { 200 fprintf(stderr, "%s [-b baseprefix] [repodir...]\n", argv0); 201 exit(1); 202 } 203 204 int 205 main(int argc, char *argv[]) 206 { 207 FILE *fp; 208 char path[PATH_MAX], repodirabs[PATH_MAX + 1]; 209 const char *repodir = NULL; 210 int i, r, ret = 0; 211 212 setlocale(LC_CTYPE, ""); 213 214 git_libgit2_init(); 215 216 #ifdef __OpenBSD__ 217 if (pledge("stdio rpath", NULL) == -1) 218 err(1, "pledge"); 219 #endif 220 221 for (i = 1, r = 0; i < argc; i++) { 222 if (argv[i][0] == '-') { 223 if (argv[i][1] != 'b' || i + 1 >= argc) 224 usage(argv[0]); 225 relpath = argv[++i]; 226 continue; 227 } 228 229 if (r++ == 0) 230 writeheader(stdout); 231 232 repodir = argv[i]; 233 if (!realpath(repodir, repodirabs)) 234 err(1, "realpath"); 235 236 if (git_repository_open_ext(&repo, repodir, 237 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) { 238 fprintf(stderr, "%s: cannot open repository\n", argv[0]); 239 ret = 1; 240 continue; 241 } 242 243 /* use directory name as name */ 244 if ((name = strrchr(repodirabs, '/'))) 245 name++; 246 else 247 name = ""; 248 249 /* read description or .git/description */ 250 joinpath(path, sizeof(path), repodir, "description"); 251 if (!(fp = fopen(path, "r"))) { 252 joinpath(path, sizeof(path), repodir, ".git/description"); 253 fp = fopen(path, "r"); 254 } 255 description[0] = '\0'; 256 if (fp) { 257 if (fgets(description, sizeof(description), fp)) 258 description[strcspn(description, "\t\r\n")] = '\0'; 259 else 260 description[0] = '\0'; 261 fclose(fp); 262 } 263 264 writelog(stdout); 265 } 266 if (!repodir) { 267 fprintf(stderr, "%s [-b baseprefix] [repodir...]\n", argv[0]); 268 return 1; 269 } 270 271 /* cleanup */ 272 git_repository_free(repo); 273 git_libgit2_shutdown(); 274 275 return ret; 276 }