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	p = fmt("%s/README.html", path);
122	if (!stat(p, &st))
123		repo->readme = "README.html";
124	if (ctx.cfg.section_from_path) {
125		n  = ctx.cfg.section_from_path;
126		if (n > 0) {
127			slash = rel;
128			while (slash && n && (slash = strchr(slash, '/')))
129				n--;
130		} else {
131			slash = rel + strlen(rel);
132			while (slash && n && (slash = xstrrchr(rel, slash, '/')))
133				n++;
134		}
135		if (slash && !n) {
136			*slash = '\0';
137			repo->section = xstrdup(rel);
138			*slash = '/';
139			if (!prefixcmp(repo->name, repo->section)) {
140				repo->name += strlen(repo->section);
141				if (*repo->name == '/')
142					repo->name++;
143			}
144		}
145	}
146
147	p = fmt("%s/cgitrc", path);
148	if (!stat(p, &st)) {
149		config_fn = fn;
150		parse_configfile(xstrdup(p), &repo_config);
151	}
152}
153
154static void scan_path(const char *base, const char *path, repo_config_fn fn)
155{
156	DIR *dir;
157	struct dirent *ent;
158	char *buf;
159	struct stat st;
160
161	if (is_git_dir(path)) {
162		add_repo(base, path, fn);
163		return;
164	}
165	if (is_git_dir(fmt("%s/.git", path))) {
166		add_repo(base, fmt("%s/.git", path), fn);
167		return;
168	}
169	dir = opendir(path);
170	if (!dir) {
171		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
172			path, strerror(errno), errno);
173		return;
174	}
175	while((ent = readdir(dir)) != NULL) {
176		if (ent->d_name[0] == '.') {
177			if (ent->d_name[1] == '\0')
178				continue;
179			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
180				continue;
181		}
182		buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
183		if (!buf) {
184			fprintf(stderr, "Alloc error on %s: %s (%d)\n",
185				path, strerror(errno), errno);
186			exit(1);
187		}
188		sprintf(buf, "%s/%s", path, ent->d_name);
189		if (stat(buf, &st)) {
190			fprintf(stderr, "Error checking path %s: %s (%d)\n",
191				buf, strerror(errno), errno);
192			free(buf);
193			continue;
194		}
195		if (S_ISDIR(st.st_mode))
196			scan_path(base, buf, fn);
197		free(buf);
198	}
199	closedir(dir);
200}
201
202#define lastc(s) s[strlen(s) - 1]
203
204void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
205{
206	char line[MAX_PATH * 2], *z;
207	FILE *projects;
208	int err;
209	
210	projects = fopen(projectsfile, "r");
211	if (!projects) {
212		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
213			projectsfile, strerror(errno), errno);
214	}
215	while (fgets(line, sizeof(line), projects) != NULL) {
216		for (z = &lastc(line);
217		     strlen(line) && strchr("\n\r", *z);
218		     z = &lastc(line))
219			*z = '\0';
220		if (strlen(line))
221			scan_path(path, fmt("%s/%s", path, line), fn);
222	}
223	if ((err = ferror(projects))) {
224		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
225			projectsfile, strerror(err), err);
226	}
227	fclose(projects);
228}
229
230void scan_tree(const char *path, repo_config_fn fn)
231{
232	scan_path(path, path, fn);
233}