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