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[ps-cgit] / 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 }