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;
 51char *desc;
 52
 53static void repo_config(const char *name, const char *value)
 54{
 55	config_fn(repo, name, value);
 56}
 57
 58static int gitweb_config(const char *key, const char *value, void *cb)
 59{
 60	if (ctx.cfg.enable_gitweb_owner && !strcmp(key, "gitweb.owner"))
 61		owner = xstrdup(value);
 62	else if (ctx.cfg.enable_gitweb_desc && !strcmp(key, "gitweb.description"))
 63		desc = xstrdup(value);
 64	return 0;
 65}
 66
 67
 68
 69static char *xstrrchr(char *s, char *from, int c)
 70{
 71	while (from >= s && *from != c)
 72		from--;
 73	return from < s ? NULL : from;
 74}
 75
 76static void add_repo(const char *base, const char *path, repo_config_fn fn)
 77{
 78	struct stat st;
 79	struct passwd *pwd;
 80	char *rel, *p, *slash;
 81	int n;
 82	size_t size;
 83
 84	if (stat(path, &st)) {
 85		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 86			path, strerror(errno), errno);
 87		return;
 88	}
 89
 90	if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
 91		return;
 92
 93	if (!stat(fmt("%s/noweb", path), &st))
 94		return;
 95
 96	owner = NULL;
 97	desc = NULL;
 98	git_config_from_file(gitweb_config, fmt("%s/config", path), NULL);
 99	
100	if (base == path)
101		rel = xstrdup(fmt("%s", path));
102	else
103		rel = xstrdup(fmt("%s", path + strlen(base) + 1));
104
105	if (!strcmp(rel + strlen(rel) - 5, "/.git"))
106		rel[strlen(rel) - 5] = '\0';
107
108	repo = cgit_add_repo(rel);
109	if (ctx.cfg.remove_suffix)
110		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
111			*p = '\0';
112	repo->name = repo->url;
113	repo->path = xstrdup(path);
114	while (!owner) {
115		if ((pwd = getpwuid(st.st_uid)) == NULL) {
116			fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
117				path, strerror(errno), errno);
118			break;
119		}
120		if (pwd->pw_gecos)
121			if ((p = strchr(pwd->pw_gecos, ',')))
122				*p = '\0';
123		owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
124	}
125	repo->owner = owner;
126
127	if (desc)
128		repo->desc = desc;
129	else {
130		p = fmt("%s/description", path);
131		if (!stat(p, &st))
132			readfile(p, &repo->desc, &size);
133	}
134
135	if (!repo->readme) {
136		p = fmt("%s/README.html", path);
137		if (!stat(p, &st))
138			repo->readme = "README.html";
139	}
140	if (ctx.cfg.section_from_path) {
141		n  = ctx.cfg.section_from_path;
142		if (n > 0) {
143			slash = rel;
144			while (slash && n && (slash = strchr(slash, '/')))
145				n--;
146		} else {
147			slash = rel + strlen(rel);
148			while (slash && n && (slash = xstrrchr(rel, slash, '/')))
149				n++;
150		}
151		if (slash && !n) {
152			*slash = '\0';
153			repo->section = xstrdup(rel);
154			*slash = '/';
155			if (!prefixcmp(repo->name, repo->section)) {
156				repo->name += strlen(repo->section);
157				if (*repo->name == '/')
158					repo->name++;
159			}
160		}
161	}
162
163	p = fmt("%s/cgitrc", path);
164	if (!stat(p, &st)) {
165		config_fn = fn;
166		parse_configfile(xstrdup(p), &repo_config);
167	}
168
169	free(rel);
170}
171
172static void scan_path(const char *base, const char *path, repo_config_fn fn)
173{
174	DIR *dir = opendir(path);
175	struct dirent *ent;
176	char *buf;
177	struct stat st;
178
179	if (!dir) {
180		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
181			path, strerror(errno), errno);
182		return;
183	}
184	if (is_git_dir(path)) {
185		add_repo(base, path, fn);
186		goto end;
187	}
188	if (is_git_dir(fmt("%s/.git", path))) {
189		add_repo(base, fmt("%s/.git", path), fn);
190		goto end;
191	}
192	while((ent = readdir(dir)) != NULL) {
193		if (ent->d_name[0] == '.') {
194			if (ent->d_name[1] == '\0')
195				continue;
196			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
197				continue;
198			if (!ctx.cfg.scan_hidden_path)
199				continue;
200		}
201		buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
202		if (!buf) {
203			fprintf(stderr, "Alloc error on %s: %s (%d)\n",
204				path, strerror(errno), errno);
205			exit(1);
206		}
207		sprintf(buf, "%s/%s", path, ent->d_name);
208		if (stat(buf, &st)) {
209			fprintf(stderr, "Error checking path %s: %s (%d)\n",
210				buf, strerror(errno), errno);
211			free(buf);
212			continue;
213		}
214		if (S_ISDIR(st.st_mode))
215			scan_path(base, buf, fn);
216		free(buf);
217	}
218end:
219	closedir(dir);
220}
221
222#define lastc(s) s[strlen(s) - 1]
223
224void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
225{
226	char line[MAX_PATH * 2], *z;
227	FILE *projects;
228	int err;
229	
230	projects = fopen(projectsfile, "r");
231	if (!projects) {
232		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
233			projectsfile, strerror(errno), errno);
234		return;
235	}
236	while (fgets(line, sizeof(line), projects) != NULL) {
237		for (z = &lastc(line);
238		     strlen(line) && strchr("\n\r", *z);
239		     z = &lastc(line))
240			*z = '\0';
241		if (strlen(line))
242			scan_path(path, fmt("%s/%s", path, line), fn);
243	}
244	if ((err = ferror(projects))) {
245		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
246			projectsfile, strerror(err), err);
247	}
248	fclose(projects);
249}
250
251void scan_tree(const char *path, repo_config_fn fn)
252{
253	scan_path(path, path, fn);
254}