Enable url=value querystring parameter

This makes is possible to use repo-urls like '/pub/scm/git/git.git' and
even add path specifications, like '/pub/scm/git/git.git/log/documentation'.

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

6 files changed, 98 insertions, 40 deletions

diff --git a/cache.c b/cache.c
index 8df7c26..7cdea9b 100644
--- a/cache.c
+++ b/cache.c
@@ -43,15 +43,18 @@ int cache_create_dirs()
 	if (mkdir(path, S_IRWXU) && errno!=EEXIST)
 		return 0;
 
-	if (!cgit_query_repo)
+	if (!cgit_repo)
 		return 0;
 
-	path = fmt("%s/%s", cgit_cache_root, cgit_query_repo);
+	path = fmt("%s/%s", cgit_cache_root,
+		   cache_safe_filename(cgit_repo->url));
+
 	if (mkdir(path, S_IRWXU) && errno!=EEXIST)
 		return 0;
 
 	if (cgit_query_page) {
-		path = fmt("%s/%s/%s", cgit_cache_root, cgit_query_repo, 
+		path = fmt("%s/%s/%s", cgit_cache_root,
+			   cache_safe_filename(cgit_repo->url),
 			   cgit_query_page);
 		if (mkdir(path, S_IRWXU) && errno!=EEXIST)
 			return 0;
diff --git a/cgit.c b/cgit.c
index 431e8fb..e5d8fbd 100644
--- a/cgit.c
+++ b/cgit.c
@@ -13,13 +13,7 @@ const char cgit_version[] = CGIT_VERSION;
 
 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;
-		return 1;
-	}
-	cgit_repo = cgit_get_repoinfo(cgit_query_repo);
-	if (!cgit_repo) {
+	if (!cgit_repo && cgit_query_repo) {
 		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
 		cgit_print_docstart(title, item);
 		cgit_print_pageheader(title, 0);
@@ -28,13 +22,19 @@ static int cgit_prepare_cache(struct cacheitem *item)
 		return 0;
 	}
 
-	if (!cgit_query_page) {
+	if (!cgit_repo) {
+		item->name = xstrdup(fmt("%s/index.html", cgit_cache_root));
+		item->ttl = cgit_cache_root_ttl;
+		return 1;
+	}
+
+	if (!cgit_cmd) {
 		item->name = xstrdup(fmt("%s/%s/index.html", cgit_cache_root,
-			   cgit_repo->url));
+			   cache_safe_filename(cgit_repo->url)));
 		item->ttl = cgit_cache_repo_ttl;
 	} else {
 		item->name = xstrdup(fmt("%s/%s/%s/%s.html", cgit_cache_root,
-			   cgit_repo->url, cgit_query_page,
+			   cache_safe_filename(cgit_repo->url), cgit_query_page,
 			   cache_safe_filename(cgit_querystring)));
 		if (cgit_query_has_symref)
 			item->ttl = cgit_cache_dynamic_ttl;
@@ -68,25 +68,20 @@ static void cgit_print_repo_page(struct cacheitem *item)
 	show_search = 0;
 	setenv("GIT_DIR", cgit_repo->path, 1);
 
-	if (cgit_query_page) {
-	    if (cgit_repo->snapshots && !strcmp(cgit_query_page, "snapshot")) {
+	if ((cgit_cmd == CMD_SNAPSHOT) && cgit_repo->snapshots) {
 		cgit_print_snapshot(item, cgit_query_sha1, "zip",
 				    cgit_repo->url, cgit_query_name);
 		return;
-	    }
-	    if (!strcmp(cgit_query_page, "blob")) {
-		    cgit_print_blob(item, cgit_query_sha1, cgit_query_path);
-		    return;
-	    }
 	}
 
-	if (cgit_query_page && !strcmp(cgit_query_page, "log"))
-		show_search = 1;
+	if (cgit_cmd == CMD_BLOB) {
+		cgit_print_blob(item, cgit_query_sha1, cgit_query_path);
+		return;
+	}
 
+	show_search = (cgit_cmd == CMD_LOG);
 	cgit_print_docstart(title, item);
-
-
-	if (!cgit_query_page) {
+	if (!cgit_cmd) {
 		cgit_print_pageheader("summary", show_search);
 		cgit_print_summary();
 		cgit_print_docend();
@@ -95,20 +90,26 @@ static void cgit_print_repo_page(struct cacheitem *item)
 
 	cgit_print_pageheader(cgit_query_page, show_search);
 
-	if (!strcmp(cgit_query_page, "log")) {
+	switch(cgit_cmd) {
+	case CMD_LOG:
 		cgit_print_log(cgit_query_head, cgit_query_ofs,
 			       cgit_max_commit_count, cgit_query_search,
 			       cgit_query_path);
-	} else if (!strcmp(cgit_query_page, "tree")) {
+		break;
+	case CMD_TREE:
 		cgit_print_tree(cgit_query_head, cgit_query_sha1, cgit_query_path);
-	} else if (!strcmp(cgit_query_page, "commit")) {
+		break;
+	case CMD_COMMIT:
 		cgit_print_commit(cgit_query_head);
-	} else if (!strcmp(cgit_query_page, "view")) {
+		break;
+	case CMD_VIEW:
 		cgit_print_view(cgit_query_sha1, cgit_query_path);
-	} else if (!strcmp(cgit_query_page, "diff")) {
+		break;
+	case CMD_DIFF:
 		cgit_print_diff(cgit_query_head, cgit_query_sha1, cgit_query_sha2,
 				cgit_query_path);
-	} else {
+		break;
+	default:
 		cgit_print_error("Invalid request");
 	}
 	cgit_print_docend();
@@ -129,7 +130,7 @@ static void cgit_fill_cache(struct cacheitem *item, int use_cache)
 		chk_positive(dup2(item->fd, STDOUT_FILENO), "Dup2(cachefile)");
 	}
 
-	if (cgit_query_repo)
+	if (cgit_repo)
 		cgit_print_repo_page(item);
 	else
 		cgit_print_repolist(item);
@@ -234,6 +235,7 @@ int main(int argc, const char **argv)
 	cgit_repolist.repos = NULL;
 
 	cgit_read_config(CGIT_CONFIG, cgit_global_config_cb);
+	cgit_repo = NULL;
 	if (getenv("SCRIPT_NAME"))
 		cgit_script_name = xstrdup(getenv("SCRIPT_NAME"));
 	if (getenv("QUERY_STRING"))
diff --git a/cgit.h b/cgit.h
index f402466..e5b3f5e 100644
--- a/cgit.h
+++ b/cgit.h
@@ -21,13 +21,13 @@
 /*
  * The valid cgit repo-commands
  */
-#define CMD_LOG      = 1;
-#define CMD_COMMIT   = 1;
-#define CMD_DIFF     = 1;
-#define CMD_TREE     = 1;
-#define CMD_VIEW     = 1;
-#define CMD_BLOB     = 1;
-#define CMD_SNAPSHOT = 1;
+#define CMD_LOG      1
+#define CMD_COMMIT   2
+#define CMD_DIFF     3
+#define CMD_TREE     4
+#define CMD_VIEW     5
+#define CMD_BLOB     6
+#define CMD_SNAPSHOT 7
 
 typedef void (*configfn)(const char *name, const char *value);
 typedef void (*filepair_fn)(struct diff_filepair *pair);
@@ -82,6 +82,7 @@ extern const char cgit_version[];
 
 extern struct repolist cgit_repolist;
 extern struct repoinfo *cgit_repo;
+extern int cgit_cmd;
 
 extern char *cgit_root_title;
 extern char *cgit_css;
@@ -162,6 +163,7 @@ extern int cgit_read_config(const char *filename, configfn fn);
 extern int cgit_parse_query(char *txt, configfn fn);
 extern struct commitinfo *cgit_parse_commit(struct commit *commit);
 extern struct taginfo *cgit_parse_tag(struct tag *tag);
+extern void cgit_parse_url(const char *url);
 
 extern char *cache_safe_filename(const char *unsafe);
 extern int cache_lock(struct cacheitem *item);
diff --git a/parsing.c b/parsing.c
index 36b0f0c..a028625 100644
--- a/parsing.c
+++ b/parsing.c
@@ -132,6 +132,49 @@ int cgit_parse_query(char *txt, configfn fn)
 	return 0;
 }
 
+/*
+ * url syntax: [repo ['/' cmd [ '/' path]]]
+ *   repo: any valid repo url, may contain '/'
+ *   cmd:  log | commit | diff | tree | view | blob | snapshot
+ *   path: any valid path, may contain '/'
+ *
+ */
+void cgit_parse_url(const char *url)
+{
+	char *cmd, *p;
+
+	cgit_repo = NULL;
+	if (!url || url[0] == '\0')
+		return;
+
+	cgit_repo = cgit_get_repoinfo(url);
+	if (cgit_repo) {
+		cgit_query_repo = cgit_repo->url;
+		return;
+	}
+
+	cmd = strchr(url, '/');
+	while (!cgit_repo && cmd) {
+		cmd[0] = '\0';
+		cgit_repo = cgit_get_repoinfo(url);
+		if (cgit_repo == NULL) {
+			cmd[0] = '/';
+			cmd = strchr(cmd + 1, '/');
+			continue;
+		}
+
+		cgit_query_repo = cgit_repo->url;
+		p = strchr(cmd + 1, '/');
+		if (p) {
+			p[0] = '\0';
+			cgit_query_path = xstrdup(p + 1);
+		}
+		cgit_cmd = cgit_get_cmd_index(cmd + 1);
+		cgit_query_page = xstrdup(cmd + 1);
+		return;
+	}
+}
+
 char *substr(const char *head, const char *tail)
 {
 	char *buf;
diff --git a/shared.c b/shared.c
index fb05427..0b074da 100644
--- a/shared.c
+++ b/shared.c
@@ -10,6 +10,7 @@
 
 struct repolist cgit_repolist;
 struct repoinfo *cgit_repo;
+int cgit_cmd;
 
 char *cgit_root_title   = "Git repository browser";
 char *cgit_css          = "/cgit.css";
@@ -184,8 +185,12 @@ void cgit_querystring_cb(const char *name, const char *value)
 {
 	if (!strcmp(name,"r")) {
 		cgit_query_repo = xstrdup(value);
+		cgit_repo = cgit_get_repoinfo(value);
 	} else if (!strcmp(name, "p")) {
 		cgit_query_page = xstrdup(value);
+		cgit_cmd = cgit_get_cmd_index(value);
+	} else if (!strcmp(name, "url")) {
+		cgit_parse_url(value);
 	} else if (!strcmp(name, "q")) {
 		cgit_query_search = xstrdup(value);
 	} else if (!strcmp(name, "h")) {
diff --git a/ui-shared.c b/ui-shared.c
index 6211056..c7fbc5e 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -68,7 +68,10 @@ char *cgit_pageurl(const char *reponame, const char *pagename,
 			return fmt("%s/%s/%s/", cgit_virtual_root, reponame,
 				   pagename);
 	} else {
-		return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
+		if (query)
+			return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
+		else
+			return fmt("?r=%s&p=%s", reponame, pagename);
 	}
 }