scan-tree.c

   1 /* scan-tree.c
   2  *
   3  * Copyright (C) 2008-2009 Lars Hjemli
   4  * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "configfile.h"
  12 #include "html.h"
  13
  14 #define MAX_PATH 4096
  15
  16 /* return 1 if path contains a objects/ directory and a HEAD file */
  17 static int is_git_dir(const char *path)
  18 {
  19         struct stat st;
  20         static char buf[MAX_PATH];
  21
  22         if (snprintf(buf, MAX_PATH, "%s/objects", path) >= MAX_PATH) {
  23                 fprintf(stderr, "Insanely long path: %s\n", path);
  24                 return 0;
  25         }
  26         if (stat(buf, &st)) {
  27                 if (errno != ENOENT)
  28                         fprintf(stderr, "Error checking path %s: %s (%d)\n",
  29                                 path, strerror(errno), errno);
  30                 return 0;
  31         }
  32         if (!S_ISDIR(st.st_mode))
  33                 return 0;
  34
  35         sprintf(buf, "%s/HEAD", path);
  36         if (stat(buf, &st)) {
  37                 if (errno != ENOENT)
  38                         fprintf(stderr, "Error checking path %s: %s (%d)\n",
  39                                 path, strerror(errno), errno);
  40                 return 0;
  41         }
  42         if (!S_ISREG(st.st_mode))
  43                 return 0;
  44
  45         return 1;
  46 }
  47
  48 struct cgit_repo *repo;
  49 repo_config_fn config_fn;
  50 char *owner;
  51
  52 static void repo_config(const char *name, const char *value)
  53 {
  54         config_fn(repo, name, value);
  55 }
  56
  57 static int git_owner_config(const char *key, const char *value, void *cb)
  58 {
  59         if (!strcmp(key, "gitweb.owner"))
  60                 owner = xstrdup(value);
  61         return 0;
  62 }
  63
  64 static char *xstrrchr(char *s, char *from, int c)
  65 {
  66         while (from >= s && *from != c)
  67                 from--;
  68         return from < s ? NULL : from;
  69 }
  70
  71 static char *guess_defbranch(const char *repo_path)
  72 {
  73         int fd, len;
  74         char buffer[256];
  75         char *ref_start;
  76         char *head;
  77
  78         head = fmt("%s/HEAD", repo_path);
  79         fd = open(head, O_RDONLY);
  80         if (fd == -1)
  81                 return xstrdup("master");
  82
  83         memset(buffer, 0, sizeof(buffer));
  84         len = read_in_full(fd, buffer, sizeof(buffer)-1);
  85         close(fd);
  86
  87         if(!memcmp(buffer, "ref: refs/heads/", 16))
  88                 return xstrndup(buffer+16, len-17);
  89
  90         if(strlen(buffer) == 41) {
  91                 /* probably contains a SHA1 sum */
  92                 memset(buffer, 0, sizeof(buffer));
  93                 if(readlink(head, buffer, sizeof(buffer)-1)) {
  94                         ref_start = memmem(buffer, sizeof(buffer)-1, "refs/heads/", 11);
  95                         if(ref_start)
  96                                 return xstrdup(ref_start+11);
  97                 }
  98         }
  99
 100         return xstrdup("master");
 101 }
 102
 103
 104 static void add_repo(const char *base, const char *path, repo_config_fn fn)
 105 {
 106         struct stat st;
 107         struct passwd *pwd;
 108         char *rel, *p, *slash;
 109         int n;
 110         size_t size;
 111
 112         if (stat(path, &st)) {
 113                 fprintf(stderr, "Error accessing %s: %s (%d)\n",
 114                         path, strerror(errno), errno);
 115                 return;
 116         }
 117
 118         if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
 119                 return;
 120
 121         if (!stat(fmt("%s/noweb", path), &st))
 122                 return;
 123
 124         owner = NULL;
 125         if (ctx.cfg.enable_gitweb_owner)
 126                 git_config_from_file(git_owner_config, fmt("%s/config", path), NULL);
 127         if (base == path)
 128                 rel = xstrdup(fmt("%s", path));
 129         else
 130                 rel = xstrdup(fmt("%s", path + strlen(base) + 1));
 131
 132         if (!strcmp(rel + strlen(rel) - 5, "/.git"))
 133                 rel[strlen(rel) - 5] = '\0';
 134
 135         repo = cgit_add_repo(rel);
 136         if (ctx.cfg.remove_suffix)
 137                 if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
 138                         *p = '\0';
 139         repo->name = repo->url;
 140         repo->path = xstrdup(path);
 141
 142         repo->defbranch = guess_defbranch(repo->path);
 143
 144         while (!owner) {
 145                 if ((pwd = getpwuid(st.st_uid)) == NULL) {
 146                         fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
 147                                 path, strerror(errno), errno);
 148                         break;
 149                 }
 150                 if (pwd->pw_gecos)
 151                         if ((p = strchr(pwd->pw_gecos, ',')))
 152                                 *p = '\0';
 153                 owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
 154         }
 155         repo->owner = owner;
 156
 157         p = fmt("%s/description", path);
 158         if (!stat(p, &st))
 159                 readfile(p, &repo->desc, &size);
 160
 161         if (!repo->readme) {
 162                 p = fmt("%s/README.html", path);
 163                 if (!stat(p, &st))
 164                         repo->readme = "README.html";
 165         }
 166         if (ctx.cfg.section_from_path) {
 167                 n  = ctx.cfg.section_from_path;
 168                 if (n > 0) {
 169                         slash = rel;
 170                         while (slash && n && (slash = strchr(slash, '/')))
 171                                 n--;
 172                 } else {
 173                         slash = rel + strlen(rel);
 174                         while (slash && n && (slash = xstrrchr(rel, slash, '/')))
 175                                 n++;
 176                 }
 177                 if (slash && !n) {
 178                         *slash = '\0';
 179                         repo->section = xstrdup(rel);
 180                         *slash = '/';
 181                         if (!prefixcmp(repo->name, repo->section)) {
 182                                 repo->name += strlen(repo->section);
 183                                 if (*repo->name == '/')
 184                                         repo->name++;
 185                         }
 186                 }
 187         }
 188
 189         p = fmt("%s/cgitrc", path);
 190         if (!stat(p, &st)) {
 191                 config_fn = fn;
 192                 parse_configfile(xstrdup(p), &repo_config);
 193         }
 194
 195         free(rel);
 196 }
 197
 198 static void scan_path(const char *base, const char *path, repo_config_fn fn)
 199 {
 200         DIR *dir = opendir(path);
 201         struct dirent *ent;
 202         char *buf;
 203         struct stat st;
 204
 205         if (!dir) {
 206                 fprintf(stderr, "Error opening directory %s: %s (%d)\n",
 207                         path, strerror(errno), errno);
 208                 return;
 209         }
 210         if (is_git_dir(path)) {
 211                 add_repo(base, path, fn);
 212                 goto end;
 213         }
 214         if (is_git_dir(fmt("%s/.git", path))) {
 215                 add_repo(base, fmt("%s/.git", path), fn);
 216                 goto end;
 217         }
 218         while((ent = readdir(dir)) != NULL) {
 219                 if (ent->d_name[0] == '.') {
 220                         if (ent->d_name[1] == '\0')
 221                                 continue;
 222                         if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
 223                                 continue;
 224                         if (!ctx.cfg.scan_hidden_path)
 225                                 continue;
 226                 }
 227                 buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
 228                 if (!buf) {
 229                         fprintf(stderr, "Alloc error on %s: %s (%d)\n",
 230                                 path, strerror(errno), errno);
 231                         exit(1);
 232                 }
 233                 sprintf(buf, "%s/%s", path, ent->d_name);
 234                 if (stat(buf, &st)) {
 235                         fprintf(stderr, "Error checking path %s: %s (%d)\n",
 236                                 buf, strerror(errno), errno);
 237                         free(buf);
 238                         continue;
 239                 }
 240                 if (S_ISDIR(st.st_mode))
 241                         scan_path(base, buf, fn);
 242                 free(buf);
 243         }
 244 end:
 245         closedir(dir);
 246 }
 247
 248 #define lastc(s) s[strlen(s) - 1]
 249
 250 void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
 251 {
 252         char line[MAX_PATH * 2], *z;
 253         FILE *projects;
 254         int err;
 255
 256         projects = fopen(projectsfile, "r");
 257         if (!projects) {
 258                 fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
 259                         projectsfile, strerror(errno), errno);
 260                 return;
 261         }
 262         while (fgets(line, sizeof(line), projects) != NULL) {
 263                 for (z = &lastc(line);
 264                      strlen(line) && strchr("\n\r", *z);
 265                      z = &lastc(line))
 266                         *z = '\0';
 267                 if (strlen(line))
 268                         scan_path(path, fmt("%s/%s", path, line), fn);
 269         }
 270         if ((err = ferror(projects))) {
 271                 fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
 272                         projectsfile, strerror(err), err);
 273         }
 274         fclose(projects);
 275 }
 276
 277 void scan_tree(const char *path, repo_config_fn fn)
 278 {
 279         scan_path(path, path, fn);
 280 }