1/* scan-tree.c
  2 * 
  3 * Copyright (C) 2008-2009 Lars Hjemli
  4 * Copyright (C) 2010 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 "configfile.h"
 12#include "html.h"
 13
 14#define MAX_PATH 4096
 15
 16/* return 1 if path contains a objects/ directory and a HEAD file */
 17static int is_git_dir(const char *path)
 18{
 19	struct stat st;
 20	static char buf[MAX_PATH];
 21
 22	if (snprintf(buf, MAX_PATH, "%s/objects", path) >= MAX_PATH) {
 23		fprintf(stderr, "Insanely long path: %s\n", path);
 24		return 0;
 25	}
 26	if (stat(buf, &st)) {
 27		if (errno != ENOENT)
 28			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 29				path, strerror(errno), errno);
 30		return 0;
 31	}
 32	if (!S_ISDIR(st.st_mode))
 33		return 0;
 34
 35	sprintf(buf, "%s/HEAD", path);
 36	if (stat(buf, &st)) {
 37		if (errno != ENOENT)
 38			fprintf(stderr, "Error checking path %s: %s (%d)\n",
 39				path, strerror(errno), errno);
 40		return 0;
 41	}
 42	if (!S_ISREG(st.st_mode))
 43		return 0;
 44
 45	return 1;
 46}
 47
 48struct cgit_repo *repo;
 49repo_config_fn config_fn;
 50char *owner;
 51
 52static void repo_config(const char *name, const char *value)
 53{
 54	config_fn(repo, name, value);
 55}
 56
 57static int git_owner_config(const char *key, const char *value, void *cb)
 58{
 59	if (!strcmp(key, "gitweb.owner"))
 60		owner = xstrdup(value);
 61	return 0;
 62}
 63
 64static char *xstrrchr(char *s, char *from, int c)
 65{
 66	while (from >= s && *from != c)
 67		from--;
 68	return from < s ? NULL : from;
 69}
 70
 71static void add_repo(const char *base, const char *path, repo_config_fn fn)
 72{
 73	struct stat st;
 74	struct passwd *pwd;
 75	char *rel, *p, *slash;
 76	int n;
 77	size_t size;
 78
 79	if (stat(path, &st)) {
 80		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 81			path, strerror(errno), errno);
 82		return;
 83	}
 84	if (!stat(fmt("%s/noweb", path), &st))
 85		return;
 86
 87	owner = NULL;
 88	if (ctx.cfg.enable_gitweb_owner)
 89		git_config_from_file(git_owner_config, fmt("%s/config", path), NULL);
 90	if (base == path)
 91		rel = xstrdup(fmt("%s", path));
 92	else
 93		rel = xstrdup(fmt("%s", path + strlen(base) + 1));
 94
 95	if (!strcmp(rel + strlen(rel) - 5, "/.git"))
 96		rel[strlen(rel) - 5] = '\0';
 97
 98	repo = cgit_add_repo(rel);
 99	if (ctx.cfg.remove_suffix)
100		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
101			*p = '\0';
102	repo->name = repo->url;
103	repo->path = xstrdup(path);
104	while (!owner) {
105		if ((pwd = getpwuid(st.st_uid)) == NULL) {
106			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
107				path, strerror(errno), errno);
108			break;
109		}
110		if (pwd->pw_gecos)
111			if ((p = strchr(pwd->pw_gecos, ',')))
112				*p = '\0';
113		owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
114	}
115	repo->owner = owner;
116
117	p = fmt("%s/description", path);
118	if (!stat(p, &st))
119		readfile(p, &repo->desc, &size);
120
121	if (!repo->readme) {
122		p = fmt("%s/README.html", path);
123		if (!stat(p, &st))
124			repo->readme = "README.html";
125	}
126	if (ctx.cfg.section_from_path) {
127		n  = ctx.cfg.section_from_path;
128		if (n > 0) {
129			slash = rel;
130			while (slash && n && (slash = strchr(slash, '/')))
131				n--;
132		} else {
133			slash = rel + strlen(rel);
134			while (slash && n && (slash = xstrrchr(rel, slash, '/')))
135				n++;
136		}
137		if (slash && !n) {
138			*slash = '\0';
139			repo->section = xstrdup(rel);
140			*slash = '/';
141			if (!prefixcmp(repo->name, repo->section)) {
142				repo->name += strlen(repo->section);
143				if (*repo->name == '/')
144					repo->name++;
145			}
146		}
147	}
148
149	p = fmt("%s/cgitrc", path);
150	if (!stat(p, &st)) {
151		config_fn = fn;
152		parse_configfile(xstrdup(p), &repo_config);
153	}
154}
155
156static void scan_path(const char *base, const char *path, repo_config_fn fn)
157{
158	DIR *dir;
159	struct dirent *ent;
160	char *buf;
161	struct stat st;
162
163	if (is_git_dir(path)) {
164		add_repo(base, path, fn);
165		return;
166	}
167	if (is_git_dir(fmt("%s/.git", path))) {
168		add_repo(base, fmt("%s/.git", path), fn);
169		return;
170	}
171	dir = opendir(path);
172	if (!dir) {
173		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
174			path, strerror(errno), errno);
175		return;
176	}
177	while((ent = readdir(dir)) != NULL) {
178		if (ent->d_name[0] == '.') {
179			if (ent->d_name[1] == '\0')
180				continue;
181			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
182				continue;
183		}
184		buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
185		if (!buf) {
186			fprintf(stderr, "Alloc error on %s: %s (%d)\n",
187				path, strerror(errno), errno);
188			exit(1);
189		}
190		sprintf(buf, "%s/%s", path, ent->d_name);
191		if (stat(buf, &st)) {
192			fprintf(stderr, "Error checking path %s: %s (%d)\n",
193				buf, strerror(errno), errno);
194			free(buf);
195			continue;
196		}
197		if (S_ISDIR(st.st_mode))
198			scan_path(base, buf, fn);
199		free(buf);
200	}
201	closedir(dir);
202}
203
204#define lastc(s) s[strlen(s) - 1]
205
206void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
207{
208	char line[MAX_PATH * 2], *z;
209	FILE *projects;
210	int err;
211	
212	projects = fopen(projectsfile, "r");
213	if (!projects) {
214		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
215			projectsfile, strerror(errno), errno);
216	}
217	while (fgets(line, sizeof(line), projects) != NULL) {
218		for (z = &lastc(line);
219		     strlen(line) && strchr("\n\r", *z);
220		     z = &lastc(line))
221			*z = '\0';
222		if (strlen(line))
223			scan_path(path, fmt("%s/%s", path, line), fn);
224	}
225	if ((err = ferror(projects))) {
226		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
227			projectsfile, strerror(err), err);
228	}
229	fclose(projects);
230}
231
232void scan_tree(const char *path, repo_config_fn fn)
233{
234	scan_path(path, path, fn);
235}