1/* scan-tree.c
  2 *
  3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
  4 *
  5 * Licensed under GNU General Public License v2
  6 *   (see COPYING for full license text)
  7 */
  8
  9#include "cgit.h"
 10#include "scan-tree.h"
 11#include "configfile.h"
 12#include "html.h"
 13
 14/* return 1 if path contains a objects/ directory and a HEAD file */
 15static int is_git_dir(const char *path)
 16{
 17	struct stat st;
 18	struct strbuf pathbuf = STRBUF_INIT;
 19	int result = 0;
 20
 21	strbuf_addf(&pathbuf, "%s/objects", path);
 22	if (stat(pathbuf.buf, &st)) {
 23		if (errno != ENOENT)
 24			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 25				path, strerror(errno), errno);
 26		goto out;
 27	}
 28	if (!S_ISDIR(st.st_mode))
 29		goto out;
 30
 31	strbuf_reset(&pathbuf);
 32	strbuf_addf(&pathbuf, "%s/HEAD", path);
 33	if (stat(pathbuf.buf, &st)) {
 34		if (errno != ENOENT)
 35			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 36				path, strerror(errno), errno);
 37		goto out;
 38	}
 39	if (!S_ISREG(st.st_mode))
 40		goto out;
 41
 42	result = 1;
 43out:
 44	strbuf_release(&pathbuf);
 45	return result;
 46}
 47
 48struct cgit_repo *repo;
 49repo_config_fn config_fn;
 50
 51static void repo_config(const char *name, const char *value)
 52{
 53	config_fn(repo, name, value);
 54}
 55
 56static 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
 70static 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
 77static void add_repo(const char *base, struct strbuf *path, repo_config_fn fn)
 78{
 79	struct stat st;
 80	struct passwd *pwd;
 81	size_t pathlen;
 82	struct strbuf rel = STRBUF_INIT;
 83	char *p, *slash;
 84	int n;
 85	size_t size;
 86
 87	if (stat(path->buf, &st)) {
 88		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 89			path->buf, strerror(errno), errno);
 90		return;
 91	}
 92
 93	strbuf_addch(path, '/');
 94	pathlen = path->len;
 95
 96	if (ctx.cfg.strict_export) {
 97		strbuf_addstr(path, ctx.cfg.strict_export);
 98		if(stat(path->buf, &st))
 99			return;
100		strbuf_setlen(path, pathlen);
101	}
102
103	strbuf_addstr(path, "noweb");
104	if (!stat(path->buf, &st))
105		return;
106	strbuf_setlen(path, pathlen);
107
108	if (prefixcmp(path->buf, base))
109		strbuf_addbuf(&rel, path);
110	else
111		strbuf_addstr(&rel, path->buf + strlen(base) + 1);
112
113	if (!strcmp(rel.buf + rel.len - 5, "/.git"))
114		strbuf_setlen(&rel, rel.len - 5);
115	else if (rel.len && rel.buf[rel.len - 1] == '/')
116		strbuf_setlen(&rel, rel.len - 1);
117
118	repo = cgit_add_repo(rel.buf);
119	config_fn = fn;
120	if (ctx.cfg.enable_git_config) {
121		strbuf_addstr(path, "config");
122		git_config_from_file(gitconfig_config, path->buf, NULL);
123		strbuf_setlen(path, pathlen);
124	}
125
126	if (ctx.cfg.remove_suffix)
127		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
128			*p = '\0';
129	repo->path = xstrdup(path->buf);
130	while (!repo->owner) {
131		if ((pwd = getpwuid(st.st_uid)) == NULL) {
132			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
133				path->buf, strerror(errno), errno);
134			break;
135		}
136		if (pwd->pw_gecos)
137			if ((p = strchr(pwd->pw_gecos, ',')))
138				*p = '\0';
139		repo->owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
140	}
141
142	if (repo->desc == cgit_default_repo_desc || !repo->desc) {
143		strbuf_addstr(path, "description");
144		if (!stat(path->buf, &st))
145			readfile(path->buf, &repo->desc, &size);
146		strbuf_setlen(path, pathlen);
147	}
148
149	if (ctx.cfg.section_from_path) {
150		n = ctx.cfg.section_from_path;
151		if (n > 0) {
152			slash = rel.buf - 1;
153			while (slash && n && (slash = strchr(slash + 1, '/')))
154				n--;
155		} else {
156			slash = rel.buf + rel.len;
157			while (slash && n && (slash = xstrrchr(rel.buf, slash - 1, '/')))
158				n++;
159		}
160		if (slash && !n) {
161			*slash = '\0';
162			repo->section = xstrdup(rel.buf);
163			*slash = '/';
164			if (!prefixcmp(repo->name, repo->section)) {
165				repo->name += strlen(repo->section);
166				if (*repo->name == '/')
167					repo->name++;
168			}
169		}
170	}
171
172	strbuf_addstr(path, "cgitrc");
173	if (!stat(path->buf, &st))
174		parse_configfile(xstrdup(path->buf), &repo_config);
175
176	strbuf_release(&rel);
177}
178
179static void scan_path(const char *base, const char *path, repo_config_fn fn)
180{
181	DIR *dir = opendir(path);
182	struct dirent *ent;
183	struct strbuf pathbuf = STRBUF_INIT;
184	size_t pathlen = strlen(path);
185	struct stat st;
186
187	if (!dir) {
188		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
189			path, strerror(errno), errno);
190		return;
191	}
192
193	strbuf_add(&pathbuf, path, strlen(path));
194	if (is_git_dir(pathbuf.buf)) {
195		add_repo(base, &pathbuf, fn);
196		goto end;
197	}
198	strbuf_addstr(&pathbuf, "/.git");
199	if (is_git_dir(pathbuf.buf)) {
200		add_repo(base, &pathbuf, fn);
201		goto end;
202	}
203	/*
204	 * Add one because we don't want to lose the trailing '/' when we
205	 * reset the length of pathbuf in the loop below.
206	 */
207	pathlen++;
208	while ((ent = readdir(dir)) != NULL) {
209		if (ent->d_name[0] == '.') {
210			if (ent->d_name[1] == '\0')
211				continue;
212			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
213				continue;
214			if (!ctx.cfg.scan_hidden_path)
215				continue;
216		}
217		strbuf_setlen(&pathbuf, pathlen);
218		strbuf_addstr(&pathbuf, ent->d_name);
219		if (stat(pathbuf.buf, &st)) {
220			fprintf(stderr, "Error checking path %s: %s (%d)\n",
221				pathbuf.buf, strerror(errno), errno);
222			continue;
223		}
224		if (S_ISDIR(st.st_mode))
225			scan_path(base, pathbuf.buf, fn);
226	}
227end:
228	strbuf_release(&pathbuf);
229	closedir(dir);
230}
231
232void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
233{
234	struct strbuf line = STRBUF_INIT;
235	FILE *projects;
236	int err;
237
238	projects = fopen(projectsfile, "r");
239	if (!projects) {
240		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
241			projectsfile, strerror(errno), errno);
242		return;
243	}
244	while (strbuf_getline(&line, projects, '\n') != EOF) {
245		if (!line.len)
246			continue;
247		strbuf_insert(&line, 0, "/", 1);
248		strbuf_insert(&line, 0, path, strlen(path));
249		scan_path(path, line.buf, fn);
250	}
251	if ((err = ferror(projects))) {
252		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
253			projectsfile, strerror(err), err);
254	}
255	fclose(projects);
256	strbuf_release(&line);
257}
258
259void scan_tree(const char *path, repo_config_fn fn)
260{
261	scan_path(path, path, fn);
262}