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#include <config.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
 49static struct cgit_repo *repo;
 50static repo_config_fn config_fn;
 51
 52static void scan_tree_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	const char *name;
 60
 61	if (!strcmp(key, "gitweb.owner"))
 62		config_fn(repo, "owner", value);
 63	else if (!strcmp(key, "gitweb.description"))
 64		config_fn(repo, "desc", value);
 65	else if (!strcmp(key, "gitweb.category"))
 66		config_fn(repo, "section", value);
 67	else if (!strcmp(key, "gitweb.homepage"))
 68		config_fn(repo, "homepage", value);
 69	else if (skip_prefix(key, "cgit.", &name))
 70		config_fn(repo, name, value);
 71
 72	return 0;
 73}
 74
 75static char *xstrrchr(char *s, char *from, int c)
 76{
 77	while (from >= s && *from != c)
 78		from--;
 79	return from < s ? NULL : from;
 80}
 81
 82static void add_repo(const char *base, struct strbuf *path, repo_config_fn fn)
 83{
 84	struct stat st;
 85	struct passwd *pwd;
 86	size_t pathlen;
 87	struct strbuf rel = STRBUF_INIT;
 88	char *p, *slash;
 89	int n;
 90	size_t size;
 91
 92	if (stat(path->buf, &st)) {
 93		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 94			path->buf, strerror(errno), errno);
 95		return;
 96	}
 97
 98	strbuf_addch(path, '/');
 99	pathlen = path->len;
100
101	if (ctx.cfg.strict_export) {
102		strbuf_addstr(path, ctx.cfg.strict_export);
103		if(stat(path->buf, &st))
104			return;
105		strbuf_setlen(path, pathlen);
106	}
107
108	strbuf_addstr(path, "noweb");
109	if (!stat(path->buf, &st))
110		return;
111	strbuf_setlen(path, pathlen);
112
113	if (!starts_with(path->buf, base))
114		strbuf_addbuf(&rel, path);
115	else
116		strbuf_addstr(&rel, path->buf + strlen(base) + 1);
117
118	if (!strcmp(rel.buf + rel.len - 5, "/.git"))
119		strbuf_setlen(&rel, rel.len - 5);
120	else if (rel.len && rel.buf[rel.len - 1] == '/')
121		strbuf_setlen(&rel, rel.len - 1);
122
123	repo = cgit_add_repo(rel.buf);
124	config_fn = fn;
125	if (ctx.cfg.enable_git_config) {
126		strbuf_addstr(path, "config");
127		git_config_from_file(gitconfig_config, path->buf, NULL);
128		strbuf_setlen(path, pathlen);
129	}
130
131	if (ctx.cfg.remove_suffix) {
132		size_t urllen;
133		strip_suffix(repo->url, ".git", &urllen);
134		strip_suffix_mem(repo->url, &urllen, "/");
135		repo->url[urllen] = '\0';
136	}
137	repo->path = xstrdup(path->buf);
138	while (!repo->owner) {
139		if ((pwd = getpwuid(st.st_uid)) == NULL) {
140			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
141				path->buf, strerror(errno), errno);
142			break;
143		}
144		if (pwd->pw_gecos)
145			if ((p = strchr(pwd->pw_gecos, ',')))
146				*p = '\0';
147		repo->owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
148	}
149
150	if (repo->desc == cgit_default_repo_desc || !repo->desc) {
151		strbuf_addstr(path, "description");
152		if (!stat(path->buf, &st))
153			readfile(path->buf, &repo->desc, &size);
154		strbuf_setlen(path, pathlen);
155	}
156
157	if (ctx.cfg.section_from_path) {
158		n = ctx.cfg.section_from_path;
159		if (n > 0) {
160			slash = rel.buf - 1;
161			while (slash && n && (slash = strchr(slash + 1, '/')))
162				n--;
163		} else {
164			slash = rel.buf + rel.len;
165			while (slash && n && (slash = xstrrchr(rel.buf, slash - 1, '/')))
166				n++;
167		}
168		if (slash && !n) {
169			*slash = '\0';
170			repo->section = xstrdup(rel.buf);
171			*slash = '/';
172			if (starts_with(repo->name, repo->section)) {
173				repo->name += strlen(repo->section);
174				if (*repo->name == '/')
175					repo->name++;
176			}
177		}
178	}
179
180	strbuf_addstr(path, "cgitrc");
181	if (!stat(path->buf, &st))
182		parse_configfile(path->buf, &scan_tree_repo_config);
183
184	strbuf_release(&rel);
185}
186
187static void scan_path(const char *base, const char *path, repo_config_fn fn)
188{
189	DIR *dir = opendir(path);
190	struct dirent *ent;
191	struct strbuf pathbuf = STRBUF_INIT;
192	size_t pathlen = strlen(path);
193	struct stat st;
194
195	if (!dir) {
196		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
197			path, strerror(errno), errno);
198		return;
199	}
200
201	strbuf_add(&pathbuf, path, strlen(path));
202	if (is_git_dir(pathbuf.buf)) {
203		add_repo(base, &pathbuf, fn);
204		goto end;
205	}
206	strbuf_addstr(&pathbuf, "/.git");
207	if (is_git_dir(pathbuf.buf)) {
208		add_repo(base, &pathbuf, fn);
209		goto end;
210	}
211	/*
212	 * Add one because we don't want to lose the trailing '/' when we
213	 * reset the length of pathbuf in the loop below.
214	 */
215	pathlen++;
216	while ((ent = readdir(dir)) != NULL) {
217		if (ent->d_name[0] == '.') {
218			if (ent->d_name[1] == '\0')
219				continue;
220			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
221				continue;
222			if (!ctx.cfg.scan_hidden_path)
223				continue;
224		}
225		strbuf_setlen(&pathbuf, pathlen);
226		strbuf_addstr(&pathbuf, ent->d_name);
227		if (stat(pathbuf.buf, &st)) {
228			fprintf(stderr, "Error checking path %s: %s (%d)\n",
229				pathbuf.buf, strerror(errno), errno);
230			continue;
231		}
232		if (S_ISDIR(st.st_mode))
233			scan_path(base, pathbuf.buf, fn);
234	}
235end:
236	strbuf_release(&pathbuf);
237	closedir(dir);
238}
239
240void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
241{
242	struct strbuf line = STRBUF_INIT;
243	FILE *projects;
244	int err;
245
246	projects = fopen(projectsfile, "r");
247	if (!projects) {
248		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
249			projectsfile, strerror(errno), errno);
250		return;
251	}
252	while (strbuf_getline(&line, projects) != EOF) {
253		if (!line.len)
254			continue;
255		strbuf_insert(&line, 0, "/", 1);
256		strbuf_insert(&line, 0, path, strlen(path));
257		scan_path(path, line.buf, fn);
258	}
259	if ((err = ferror(projects))) {
260		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
261			projectsfile, strerror(err), err);
262	}
263	fclose(projects);
264	strbuf_release(&line);
265}
266
267void scan_tree(const char *path, repo_config_fn fn)
268{
269	scan_path(path, path, fn);
270}