Read repo-info from /etc/cgitrc

This makes cgit read all repo-info from the configfile, instead of scanning for
possible git-dirs below a common root path. This is primarily done to get
better security (separate physical path from logical repo-name).

In /etc/cgitrc each repo is registered with the following keys:

repo.url
repo.name
repo.path
repo.desc
repo.owner

Note:

*Required keys are repo.url and repo.path, all others are optional
*Each occurrence of repo.url starts a new repository registration
*Default value for repo.name is taken from repo.url
*The value of repo.url cannot contain characters with special meaning for
 urls (i.e. one of /?%&), while repo.name can contain anything.

Example:

repo.url=cgit-pub
repo.name=cgit/public
repo.path=/pub/git/cgit
repo.desc=My public cgit repo
repo.owner=Lars Hjemli

repo.url=cgit-priv
repo.name=cgit/private
repo.path=/home/larsh/src/cgit/.git
repo.desc=My private cgit repo
repo.owner=Lars Hjemli

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

5 files changed, 120 insertions, 55 deletions

diff --git a/cgit.c b/cgit.c
index 9535abc..0fa203c 100644
--- a/cgit.c
+++ b/cgit.c
@@ -10,18 +10,45 @@
 
 const char cgit_version[] = CGIT_VERSION;
 
-static void cgit_prepare_cache(struct cacheitem *item)
+
+static struct repoinfo *cgit_get_repoinfo(char *url)
+{
+	int i;
+	struct repoinfo *repo;
+	
+	for (i=0; i<cgit_repolist.count; i++) {
+		repo = &cgit_repolist.repos[i];
+		if (!strcmp(repo->url, url))
+			return repo;
+	}
+	return NULL;
+}
+
+
+static int cgit_prepare_cache(struct cacheitem *item)
 {
 	if (!cgit_query_repo) {
 		item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
 		item->ttl = cgit_cache_root_ttl;
-	} else if (!cgit_query_page) {
+		return 1;
+	}
+	cgit_repo = cgit_get_repoinfo(cgit_query_repo);
+	if (!cgit_repo) {
+		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
+		cgit_print_docstart(title, item);
+		cgit_print_pageheader(title, 0);
+		cgit_print_error(fmt("Unknown repo: %s", cgit_query_repo));
+		cgit_print_docend();
+		return 0;
+	}
+
+	if (!cgit_query_page) {
 		item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root, 
-			   cgit_query_repo));
+			   cgit_repo->url));
 		item->ttl = cgit_cache_repo_ttl;
 	} else {
 		item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root, 
-			   cgit_query_repo, cgit_query_page, 
+			   cgit_repo->url, cgit_query_page, 
 			   cache_safe_filename(cgit_querystring)));
 		if (cgit_query_has_symref)
 			item->ttl = cgit_cache_dynamic_ttl;
@@ -30,13 +57,16 @@ static void cgit_prepare_cache(struct cacheitem *item)
 		else
 			item->ttl = cgit_cache_repo_ttl;
 	}
+	return 1;
 }
 
 static void cgit_print_repo_page(struct cacheitem *item)
 {
-	if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) || 
-	    cgit_read_config("info/cgit", cgit_repo_config_cb)) {
-		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
+	char *title;
+	int show_search;
+
+	if (chdir(cgit_repo->path)) {
+		title = fmt("%s - %s", cgit_root_title, "Bad request");
 		cgit_print_docstart(title, item);
 		cgit_print_pageheader(title, 0);
 		cgit_print_error(fmt("Unable to scan repository: %s",
@@ -44,9 +74,10 @@ static void cgit_print_repo_page(struct cacheitem *item)
 		cgit_print_docend();
 		return;
 	}
-	setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
-	char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
-	int show_search = 0;
+
+	title = fmt("%s - %s", cgit_repo->name, cgit_repo->desc);
+	show_search = 0;
+	setenv("GIT_DIR", cgit_repo->path, 1);
 	if (cgit_query_page && !strcmp(cgit_query_page, "log"))
 		show_search = 1;
 	cgit_print_docstart(title, item);
@@ -131,9 +162,6 @@ static void cgit_parse_args(int argc, const char **argv)
 	int i;
 
 	for (i = 1; i < argc; i++) {
-		if (!strncmp(argv[i], "--root=", 7)) {
-			cgit_root = xstrdup(argv[i]+7);
-		}
 		if (!strncmp(argv[i], "--cache=", 8)) {
 			cgit_cache_root = xstrdup(argv[i]+8);
 		}
@@ -167,13 +195,19 @@ int main(int argc, const char **argv)
 {
 	struct cacheitem item;
 
+	htmlfd = STDOUT_FILENO;
+	item.st.st_mtime = time(NULL);
+	cgit_repolist.length = 0;
+	cgit_repolist.count = 0;
+	cgit_repolist.repos = NULL;
+
 	cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
 	if (getenv("QUERY_STRING"))
 		cgit_querystring = xstrdup(getenv("QUERY_STRING"));
 	cgit_parse_args(argc, argv);
 	cgit_parse_query(cgit_querystring, cgit_querystring_cb);
-
-	cgit_prepare_cache(&item);
+	if (!cgit_prepare_cache(&item))
+		return 0;
 	if (cgit_nocache) {
 		item.fd = STDOUT_FILENO;
 		cgit_fill_cache(&item);
diff --git a/cgit.h b/cgit.h
index a3b5385..2a3cd5a 100644
--- a/cgit.h
+++ b/cgit.h
@@ -15,6 +15,20 @@ struct cacheitem {
 	int fd;
 };
 
+struct repoinfo {
+	char *url;
+	char *name;
+	char *path;
+	char *desc;
+	char *owner;
+};
+
+struct repolist {
+	int length;
+	int count;
+	struct repoinfo *repos;
+};
+
 struct commitinfo {
 	struct commit *commit;
 	char *author;
@@ -36,7 +50,9 @@ struct taginfo {
 
 extern const char cgit_version[];
 
-extern char *cgit_root;
+extern struct repolist cgit_repolist;
+extern struct repoinfo *cgit_repo;
+
 extern char *cgit_root_title;
 extern char *cgit_css;
 extern char *cgit_logo;
diff --git a/cgitrc b/cgitrc
index 7e7fae5..da3d138 100644
--- a/cgitrc
+++ b/cgitrc
@@ -3,10 +3,6 @@
 ##
 
 
-## root folder for git repos
-#root=/usr/src/git
-
-
 ## base for virtual urls. If specified, rewrite rules must be added to 
 ## httpd.conf. Possible rules for /git/ when cgit.cgi is accessed as /cgit.cgi:
 ##
@@ -61,3 +57,12 @@
 
 ## ttl for static pages (addressed by SHA-1)
 #cache-static-ttl=-1
+
+
+
+## Example repository entry
+#repo.url=cgit
+#repo.name=cgit
+#repo.desc=the caching cgi for git
+#repo.path=/pub/git/cgit
+#repo.owner=Lars Hjemli
diff --git a/shared.c b/shared.c
index 8e6df31..6fd70a8 100644
--- a/shared.c
+++ b/shared.c
@@ -8,7 +8,9 @@
 
 #include "cgit.h"
 
-char *cgit_root         = "/usr/src/git";
+struct repolist cgit_repolist;
+struct repoinfo *cgit_repo;
+
 char *cgit_root_title   = "Git repository browser";
 char *cgit_css          = "/cgit.css";
 char *cgit_logo         = "/git-logo.png";
@@ -46,11 +48,32 @@ int   cgit_query_ofs    = 0;
 
 int htmlfd = 0;
 
+struct repoinfo *add_repo(const char *url)
+{
+	struct repoinfo *ret;
+
+	if (++cgit_repolist.count > cgit_repolist.length) {
+		if (cgit_repolist.length == 0)
+			cgit_repolist.length = 8;
+		else
+			cgit_repolist.length *= 2;
+		cgit_repolist.repos = xrealloc(cgit_repolist.repos, 
+					       cgit_repolist.length * 
+					       sizeof(struct repoinfo));
+	}
+
+	ret = &cgit_repolist.repos[cgit_repolist.count-1];
+	ret->url = xstrdup(url);
+	ret->name = ret->url;
+	ret->path = NULL;
+	ret->desc = NULL;
+	ret->owner = NULL;
+	return ret;
+}
+
 void cgit_global_config_cb(const char *name, const char *value)
 {
-	if (!strcmp(name, "root"))
-		cgit_root = xstrdup(value);
-	else if (!strcmp(name, "root-title"))
+	if (!strcmp(name, "root-title"))
 		cgit_root_title = xstrdup(value);
 	else if (!strcmp(name, "css"))
 		cgit_css = xstrdup(value);
@@ -74,6 +97,16 @@ void cgit_global_config_cb(const char *name, const char *value)
 		cgit_cache_dynamic_ttl = atoi(value);
 	else if (!strcmp(name, "max-message-length"))
 		cgit_max_msg_len = atoi(value);
+	else if (!strcmp(name, "repo.url"))
+		cgit_repo = add_repo(value);
+	else if (!strcmp(name, "repo.name"))
+		cgit_repo->name = xstrdup(value);
+	else if (cgit_repo && !strcmp(name, "repo.path"))
+		cgit_repo->path = xstrdup(value);
+	else if (cgit_repo && !strcmp(name, "repo.desc"))
+		cgit_repo->desc = xstrdup(value);
+	else if (cgit_repo && !strcmp(name, "repo.owner"))
+		cgit_repo->owner = xstrdup(value);
 }
 
 void cgit_repo_config_cb(const char *name, const char *value)
diff --git a/ui-repolist.c b/ui-repolist.c
index bd4af59..011ec95 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -10,54 +10,31 @@
 
 void cgit_print_repolist(struct cacheitem *item)
 {
-	DIR *d;
-	struct dirent *de;
-	struct stat st;
-	char *name;
+	struct repoinfo *repo;
+	int i;
 
-	chdir(cgit_root);
 	cgit_print_docstart(cgit_root_title, item);
 	cgit_print_pageheader(cgit_root_title, 0);
 
-	if (!(d = opendir("."))) {
-		cgit_print_error(fmt("Unable to scan repository directory: %s",
-				     strerror(errno)));
-		cgit_print_docend();
-		return;
-	}
-
 	html("<h2>Repositories</h2>\n");
 	html("<table class='list nowrap'>");
 	html("<tr class='nohover'>"
 	     "<th class='left'>Name</th>"
 	     "<th class='left'>Description</th>"
 	     "<th class='left'>Owner</th></tr>\n");
-	while ((de = readdir(d)) != NULL) {
-		if (de->d_name[0] == '.')
-			continue;
-		if (stat(de->d_name, &st) < 0)
-			continue;
-		if (!S_ISDIR(st.st_mode))
-			continue;
-
-		cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
-		name = fmt("%s/info/cgit", de->d_name);
-		if (cgit_read_config(name, cgit_repo_config_cb))
-			continue;
 
+	for (i=0; i<cgit_repolist.count; i++) {
+		repo = &cgit_repolist.repos[i];
 		html("<tr><td>");
-		html_link_open(cgit_repourl(de->d_name), NULL, NULL);
-		html_txt(cgit_repo_name);
+		html_link_open(cgit_repourl(repo->url), NULL, NULL);
+		html_txt(repo->name);
 		html_link_close();
 		html("</td><td>");
-		html_txt(cgit_repo_desc);
+		html_txt(repo->desc);
 		html("</td><td>");
-		html_txt(cgit_repo_owner);
+		html_txt(repo->owner);
 		html("</td></tr>\n");
 	}
-	closedir(d);
 	html("</table>");
 	cgit_print_docend();
 }
-
-