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/* return 1 if path contains a objects/ directory and a HEAD file */
 16static int is_git_dir(const char *path)
 17{
 18	struct stat st;
 19	struct strbuf pathbuf = STRBUF_INIT;
 20	int result = 0;
 21
 22	strbuf_addf(&pathbuf, "%s/objects", path);
 23	if (stat(pathbuf.buf, &st)) {
 24		if (errno != ENOENT)
 25			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 26				path, strerror(errno), errno);
 27		goto out;
 28	}
 29	if (!S_ISDIR(st.st_mode))
 30		goto out;
 31
 32	strbuf_reset(&pathbuf);
 33	strbuf_addf(&pathbuf, "%s/HEAD", path);
 34	if (stat(pathbuf.buf, &st)) {
 35		if (errno != ENOENT)
 36			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 37				path, strerror(errno), errno);
 38		goto out;
 39	}
 40	if (!S_ISREG(st.st_mode))
 41		goto out;
 42
 43	result = 1;
 44out:
 45	strbuf_release(&pathbuf);
 46	return result;
 47}
 48
 49struct cgit_repo *repo;
 50repo_config_fn config_fn;
 51
 52static void repo_config(const char *name, const char *value)
 53{
 54	config_fn(repo, name, value);
 55}
 56
 57static 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
 71static 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
 78static void add_repo(const char *base, struct strbuf *path, repo_config_fn fn)
 79{
 80	struct stat st;
 81	struct passwd *pwd;
 82	size_t pathlen;
 83	struct strbuf rel = STRBUF_INIT;
 84	char *p, *slash;
 85	int n;
 86	size_t size;
 87
 88	if (stat(path->buf, &st)) {
 89		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 90			path->buf, strerror(errno), errno);
 91		return;
 92	}
 93
 94	strbuf_addch(path, '/');
 95	pathlen = path->len;
 96
 97	if (ctx.cfg.strict_export) {
 98		strbuf_addstr(path, ctx.cfg.strict_export);
 99		if(stat(path->buf, &st))
100			return;
101		strbuf_setlen(path, pathlen);
102	}
103
104	strbuf_addstr(path, "noweb");
105	if (!stat(path->buf, &st))
106		return;
107	strbuf_setlen(path, pathlen);
108
109	if (strncmp(base, path->buf, strlen(base)))
110		strbuf_addbuf(&rel, path);
111	else
112		strbuf_addstr(&rel, path->buf + strlen(base) + 1);
113
114	if (!strcmp(rel.buf + rel.len - 5, "/.git"))
115		strbuf_setlen(&rel, rel.len - 5);
116
117	repo = cgit_add_repo(rel.buf);
118	config_fn = fn;
119	if (ctx.cfg.enable_git_config) {
120		strbuf_addstr(path, "config");
121		git_config_from_file(gitconfig_config, path->buf, NULL);
122		strbuf_setlen(path, pathlen);
123	}
124
125	if (ctx.cfg.remove_suffix)
126		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
127			*p = '\0';
128	repo->path = xstrdup(path->buf);
129	while (!repo->owner) {
130		if ((pwd = getpwuid(st.st_uid)) == NULL) {
131			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
132				path->buf, strerror(errno), errno);
133			break;
134		}
135		if (pwd->pw_gecos)
136			if ((p = strchr(pwd->pw_gecos, ',')))
137				*p = '\0';
138		repo->owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
139	}
140
141	if (repo->desc == cgit_default_repo_desc || !repo->desc) {
142		strbuf_addstr(path, "description");
143		if (!stat(path->buf, &st))
144			readfile(path->buf, &repo->desc, &size);
145		strbuf_setlen(path, pathlen);
146	}
147
148	if (!repo->readme) {
149		strbuf_addstr(path, "README.html");
150		if (!stat(path->buf, &st))
151			repo->readme = "README.html";
152		strbuf_setlen(path, pathlen);
153	}
154	if (ctx.cfg.section_from_path) {
155		n  = ctx.cfg.section_from_path;
156		if (n > 0) {
157			slash = rel.buf;
158			while (slash && n && (slash = strchr(slash, '/')))
159				n--;
160		} else {
161			slash = rel.buf + rel.len;
162			while (slash && n && (slash = xstrrchr(rel.buf, slash, '/')))
163				n++;
164		}
165		if (slash && !n) {
166			*slash = '\0';
167			repo->section = xstrdup(rel.buf);
168			*slash = '/';
169			if (!prefixcmp(repo->name, repo->section)) {
170				repo->name += strlen(repo->section);
171				if (*repo->name == '/')
172					repo->name++;
173			}
174		}
175	}
176
177	strbuf_addstr(path, "cgitrc");
178	if (!stat(path->buf, &st))
179		parse_configfile(xstrdup(path->buf), &repo_config);
180
181	strbuf_release(&rel);
182}
183
184static void scan_path(const char *base, const char *path, repo_config_fn fn)
185{
186	DIR *dir = opendir(path);
187	struct dirent *ent;
188	struct strbuf pathbuf = STRBUF_INIT;
189	size_t pathlen = strlen(path);
190	struct stat st;
191
192	if (!dir) {
193		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
194			path, strerror(errno), errno);
195		return;
196	}
197
198	strbuf_add(&pathbuf, path, strlen(path));
199	if (is_git_dir(pathbuf.buf)) {
200		add_repo(base, &pathbuf, fn);
201		goto end;
202	}
203	strbuf_addstr(&pathbuf, "/.git");
204	if (is_git_dir(pathbuf.buf)) {
205		add_repo(base, &pathbuf, fn);
206		goto end;
207	}
208	/*
209	 * Add one because we don't want to lose the trailing '/' when we
210	 * reset the length of pathbuf in the loop below.
211	 */
212	pathlen++;
213	while ((ent = readdir(dir)) != NULL) {
214		if (ent->d_name[0] == '.') {
215			if (ent->d_name[1] == '\0')
216				continue;
217			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
218				continue;
219			if (!ctx.cfg.scan_hidden_path)
220				continue;
221		}
222		strbuf_setlen(&pathbuf, pathlen);
223		strbuf_addstr(&pathbuf, ent->d_name);
224		if (stat(pathbuf.buf, &st)) {
225			fprintf(stderr, "Error checking path %s: %s (%d)\n",
226				pathbuf.buf, strerror(errno), errno);
227			continue;
228		}
229		if (S_ISDIR(st.st_mode))
230			scan_path(base, pathbuf.buf, fn);
231	}
232end:
233	strbuf_release(&pathbuf);
234	closedir(dir);
235}
236
237#define lastc(s) s[strlen(s) - 1]
238
239void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
240{
241	struct strbuf line = STRBUF_INIT;
242	FILE *projects;
243	int err;
244
245	projects = fopen(projectsfile, "r");
246	if (!projects) {
247		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
248			projectsfile, strerror(errno), errno);
249		return;
250	}
251	while (strbuf_getline(&line, projects, '\n') != EOF) {
252		if (!line.len)
253			continue;
254		strbuf_insert(&line, 0, "/", 1);
255		strbuf_insert(&line, 0, path, strlen(path));
256		scan_path(path, line.buf, fn);
257	}
258	if ((err = ferror(projects))) {
259		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
260			projectsfile, strerror(err), err);
261	}
262	fclose(projects);
263	strbuf_release(&line);
264}
265
266void scan_tree(const char *path, repo_config_fn fn)
267{
268	scan_path(path, path, fn);
269}