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