scan-tree.c

   1 /* scan-tree.c
   2  *
   3  * Copyright (C) 2008-2009 Lars Hjemli
   4  * Copyright (C) 2010, 2012 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
  51 static void repo_config(const char *name, const char *value)
  52 {
  53         config_fn(repo, name, value);
  54 }
  55
  56 static int gitconfig_config(const char *key, const char *value, void *cb)
  57 {
  58         if (!strcmp(key, "gitweb.owner"))
  59                 config_fn(repo, "owner", value);
  60         else if (!strcmp(key, "gitweb.description"))
  61                 config_fn(repo, "desc", value);
  62         else if (!strcmp(key, "gitweb.category"))
  63                 config_fn(repo, "section", value);
  64         else if (!prefixcmp(key, "cgit."))
  65                 config_fn(repo, key + 5, value);
  66
  67         return 0;
  68 }
  69
  70 static char *xstrrchr(char *s, char *from, int c)
  71 {
  72         while (from >= s && *from != c)
  73                 from--;
  74         return from < s ? NULL : from;
  75 }
  76
  77 static void add_repo(const char *base, const char *path, repo_config_fn fn)
  78 {
  79         struct stat st;
  80         struct passwd *pwd;
  81         char *rel, *p, *slash;
  82         int n;
  83         size_t size;
  84
  85         if (stat(path, &st)) {
  86                 fprintf(stderr, "Error accessing %s: %s (%d)\n",
  87                         path, strerror(errno), errno);
  88                 return;
  89         }
  90
  91         if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
  92                 return;
  93
  94         if (!stat(fmt("%s/noweb", path), &st))
  95                 return;
  96
  97         if (base == path)
  98                 rel = xstrdup(fmt("%s", path));
  99         else
 100                 rel = xstrdup(fmt("%s", path + strlen(base) + 1));
 101
 102         if (!strcmp(rel + strlen(rel) - 5, "/.git"))
 103                 rel[strlen(rel) - 5] = '\0';
 104
 105         repo = cgit_add_repo(rel);
 106         config_fn = fn;
 107         if (ctx.cfg.enable_git_config)
 108                 git_config_from_file(gitconfig_config, fmt("%s/config", path), NULL);
 109
 110         if (ctx.cfg.remove_suffix)
 111                 if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
 112                         *p = '\0';
 113         repo->path = xstrdup(path);
 114         while (!repo->owner) {
 115                 if ((pwd = getpwuid(st.st_uid)) == NULL) {
 116                         fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
 117                                 path, strerror(errno), errno);
 118                         break;
 119                 }
 120                 if (pwd->pw_gecos)
 121                         if ((p = strchr(pwd->pw_gecos, ',')))
 122                                 *p = '\0';
 123                 repo->owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
 124         }
 125
 126         if (repo->desc == cgit_default_repo_desc || !repo->desc) {
 127                 p = fmt("%s/description", path);
 128                 if (!stat(p, &st))
 129                         readfile(p, &repo->desc, &size);
 130         }
 131
 132         if (!repo->readme) {
 133                 p = fmt("%s/README.html", path);
 134                 if (!stat(p, &st))
 135                         repo->readme = "README.html";
 136         }
 137         if (ctx.cfg.section_from_path) {
 138                 n  = ctx.cfg.section_from_path;
 139                 if (n > 0) {
 140                         slash = rel;
 141                         while (slash && n && (slash = strchr(slash, '/')))
 142                                 n--;
 143                 } else {
 144                         slash = rel + strlen(rel);
 145                         while (slash && n && (slash = xstrrchr(rel, slash, '/')))
 146                                 n++;
 147                 }
 148                 if (slash && !n) {
 149                         *slash = '\0';
 150                         repo->section = xstrdup(rel);
 151                         *slash = '/';
 152                         if (!prefixcmp(repo->name, repo->section)) {
 153                                 repo->name += strlen(repo->section);
 154                                 if (*repo->name == '/')
 155                                         repo->name++;
 156                         }
 157                 }
 158         }
 159
 160         p = fmt("%s/cgitrc", path);
 161         if (!stat(p, &st))
 162                 parse_configfile(xstrdup(p), &repo_config);
 163
 164
 165         free(rel);
 166 }
 167
 168 static void scan_path(const char *base, const char *path, repo_config_fn fn)
 169 {
 170         DIR *dir = opendir(path);
 171         struct dirent *ent;
 172         char *buf;
 173         struct stat st;
 174
 175         if (!dir) {
 176                 fprintf(stderr, "Error opening directory %s: %s (%d)\n",
 177                         path, strerror(errno), errno);
 178                 return;
 179         }
 180         if (is_git_dir(path)) {
 181                 add_repo(base, path, fn);
 182                 goto end;
 183         }
 184         if (is_git_dir(fmt("%s/.git", path))) {
 185                 add_repo(base, fmt("%s/.git", path), fn);
 186                 goto end;
 187         }
 188         while ((ent = readdir(dir)) != NULL) {
 189                 if (ent->d_name[0] == '.') {
 190                         if (ent->d_name[1] == '\0')
 191                                 continue;
 192                         if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
 193                                 continue;
 194                         if (!ctx.cfg.scan_hidden_path)
 195                                 continue;
 196                 }
 197                 buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
 198                 if (!buf) {
 199                         fprintf(stderr, "Alloc error on %s: %s (%d)\n",
 200                                 path, strerror(errno), errno);
 201                         exit(1);
 202                 }
 203                 sprintf(buf, "%s/%s", path, ent->d_name);
 204                 if (stat(buf, &st)) {
 205                         fprintf(stderr, "Error checking path %s: %s (%d)\n",
 206                                 buf, strerror(errno), errno);
 207                         free(buf);
 208                         continue;
 209                 }
 210                 if (S_ISDIR(st.st_mode))
 211                         scan_path(base, buf, fn);
 212                 free(buf);
 213         }
 214 end:
 215         closedir(dir);
 216 }
 217
 218 #define lastc(s) s[strlen(s) - 1]
 219
 220 void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
 221 {
 222         char line[MAX_PATH * 2], *z;
 223         FILE *projects;
 224         int err;
 225
 226         projects = fopen(projectsfile, "r");
 227         if (!projects) {
 228                 fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
 229                         projectsfile, strerror(errno), errno);
 230                 return;
 231         }
 232         while (fgets(line, sizeof(line), projects) != NULL) {
 233                 for (z = &lastc(line);
 234                      strlen(line) && strchr("\n\r", *z);
 235                      z = &lastc(line))
 236                         *z = '\0';
 237                 if (strlen(line))
 238                         scan_path(path, fmt("%s/%s", path, line), fn);
 239         }
 240         if ((err = ferror(projects))) {
 241                 fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
 242                         projectsfile, strerror(err), err);
 243         }
 244         fclose(projects);
 245 }
 246
 247 void scan_tree(const char *path, repo_config_fn fn)
 248 {
 249         scan_path(path, path, fn);
 250 }