1/* scan-tree.c
  2 * 
  3 * Copyright (C) 2008-2009 Lars Hjemli
  4 * Copyright (C) 2010, 2012 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;
 50
 51static void repo_config(const char *name, const char *value)
 52{
 53	config_fn(repo, name, value);
 54}
 55
 56static int gitconfig_config(const char *key, const char *value, void *cb)
 57{
 58	if (!strcmp(key, "gitweb.owner"))
 59		config_fn(repo, "owner", value);
 60	else if (!strcmp(key, "gitweb.description"))
 61		config_fn(repo, "desc", value);
 62	else if (!strcmp(key, "gitweb.category"))
 63		config_fn(repo, "section", value);
 64	else if (!prefixcmp(key, "cgit."))
 65		config_fn(repo, key + 5, value);
 66
 67	return 0;
 68}
 69
 70static char *xstrrchr(char *s, char *from, int c)
 71{
 72	while (from >= s && *from != c)
 73		from--;
 74	return from < s ? NULL : from;
 75}
 76
 77static void add_repo(const char *base, const char *path, repo_config_fn fn)
 78{
 79	struct stat st;
 80	struct passwd *pwd;
 81	char *rel, *p, *slash;
 82	int n;
 83	size_t size;
 84
 85	if (stat(path, &st)) {
 86		fprintf(stderr, "Error accessing %s: %s (%d)\n",
 87			path, strerror(errno), errno);
 88		return;
 89	}
 90
 91	if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
 92		return;
 93
 94	if (!stat(fmt("%s/noweb", path), &st))
 95		return;
 96
 97	if (base == path)
 98		rel = xstrdup(fmt("%s", path));
 99	else
100		rel = xstrdup(fmt("%s", path + strlen(base) + 1));
101
102	if (!strcmp(rel + strlen(rel) - 5, "/.git"))
103		rel[strlen(rel) - 5] = '\0';
104
105	repo = cgit_add_repo(rel);
106	config_fn = fn;
107	if (ctx.cfg.enable_git_config)
108		git_config_from_file(gitconfig_config, fmt("%s/config", path), NULL);
109	
110	if (ctx.cfg.remove_suffix)
111		if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
112			*p = '\0';
113	repo->path = xstrdup(path);
114	while (!repo->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		repo->owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
124	}
125
126	if (repo->desc == cgit_default_repo_desc || !repo->desc) {
127		p = fmt("%s/description", path);
128		if (!stat(p, &st))
129			readfile(p, &repo->desc, &size);
130	}
131
132	if (!repo->readme) {
133		p = fmt("%s/README.html", path);
134		if (!stat(p, &st))
135			repo->readme = "README.html";
136	}
137	if (ctx.cfg.section_from_path) {
138		n  = ctx.cfg.section_from_path;
139		if (n > 0) {
140			slash = rel;
141			while (slash && n && (slash = strchr(slash, '/')))
142				n--;
143		} else {
144			slash = rel + strlen(rel);
145			while (slash && n && (slash = xstrrchr(rel, slash, '/')))
146				n++;
147		}
148		if (slash && !n) {
149			*slash = '\0';
150			repo->section = xstrdup(rel);
151			*slash = '/';
152			if (!prefixcmp(repo->name, repo->section)) {
153				repo->name += strlen(repo->section);
154				if (*repo->name == '/')
155					repo->name++;
156			}
157		}
158	}
159
160	p = fmt("%s/cgitrc", path);
161	if (!stat(p, &st))
162		parse_configfile(xstrdup(p), &repo_config);
163
164
165	free(rel);
166}
167
168static void scan_path(const char *base, const char *path, repo_config_fn fn)
169{
170	DIR *dir = opendir(path);
171	struct dirent *ent;
172	char *buf;
173	struct stat st;
174
175	if (!dir) {
176		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
177			path, strerror(errno), errno);
178		return;
179	}
180	if (is_git_dir(path)) {
181		add_repo(base, path, fn);
182		goto end;
183	}
184	if (is_git_dir(fmt("%s/.git", path))) {
185		add_repo(base, fmt("%s/.git", path), fn);
186		goto end;
187	}
188	while((ent = readdir(dir)) != NULL) {
189		if (ent->d_name[0] == '.') {
190			if (ent->d_name[1] == '\0')
191				continue;
192			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
193				continue;
194			if (!ctx.cfg.scan_hidden_path)
195				continue;
196		}
197		buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
198		if (!buf) {
199			fprintf(stderr, "Alloc error on %s: %s (%d)\n",
200				path, strerror(errno), errno);
201			exit(1);
202		}
203		sprintf(buf, "%s/%s", path, ent->d_name);
204		if (stat(buf, &st)) {
205			fprintf(stderr, "Error checking path %s: %s (%d)\n",
206				buf, strerror(errno), errno);
207			free(buf);
208			continue;
209		}
210		if (S_ISDIR(st.st_mode))
211			scan_path(base, buf, fn);
212		free(buf);
213	}
214end:
215	closedir(dir);
216}
217
218#define lastc(s) s[strlen(s) - 1]
219
220void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
221{
222	char line[MAX_PATH * 2], *z;
223	FILE *projects;
224	int err;
225	
226	projects = fopen(projectsfile, "r");
227	if (!projects) {
228		fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
229			projectsfile, strerror(errno), errno);
230		return;
231	}
232	while (fgets(line, sizeof(line), projects) != NULL) {
233		for (z = &lastc(line);
234		     strlen(line) && strchr("\n\r", *z);
235		     z = &lastc(line))
236			*z = '\0';
237		if (strlen(line))
238			scan_path(path, fmt("%s/%s", path, line), fn);
239	}
240	if ((err = ferror(projects))) {
241		fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
242			projectsfile, strerror(err), err);
243	}
244	fclose(projects);
245}
246
247void scan_tree(const char *path, repo_config_fn fn)
248{
249	scan_path(path, path, fn);
250}