readme: use string_list instead of space deliminations

Now this is possible in cgitrc -

readme=:README.md
readme=:readme.md
readme=:README.mkd
readme=:readme.mkd
readme=:README.rst
readme=:readme.rst
readme=:README.html
readme=:readme.html
readme=:README.htm
readme=:readme.htm
readme=:README.txt
readme=:readme.txt
readme=:README
readme=:readme
readme=:INSTALL.txt
readme=:install.txt
readme=:INSTALL
readme=:install

Suggested-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 45 insertions, 55 deletions

diff --git a/ui-summary.c b/ui-summary.c
index 57206dd..d8500d6 100644
--- a/ui-summary.c
+++ b/ui-summary.c
@@ -1,7 +1,7 @@
 /* ui-summary.c: functions for generating repo summary page
  *
  * Copyright (C) 2006 Lars Hjemli
- * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
+ * Copyright (C) 2010-2013 Jason A. Donenfeld <Jason@zx2c4.com>
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
@@ -13,6 +13,7 @@
 #include "ui-log.h"
 #include "ui-refs.h"
 #include "ui-blob.h"
+#include <libgen.h>
 
 static void print_url(char *base, char *suffix)
 {
@@ -95,69 +96,57 @@ void cgit_print_summary()
         html("</table>");
 }
 
-/* The caller must free filename and ref after calling this. */
-void cgit_parse_readme(const char *readme, const char *path, char **filename, char **ref, struct cgit_repo *repo)
+/* The caller must free the return value. */
+static char* append_readme_path(const char *filename, const char *ref, const char *path)
 {
-        const char *slash, *colon;
-        char *resolved_base, *resolved_full;
-
-        *filename = NULL;
-        *ref = NULL;
-
-        if (!readme || !(*readme))
-                return;
-
-        /* Check if the readme is tracked in the git repo. */
-        colon = strchr(readme, ':');
-        if (colon && strlen(colon) > 1) {
-                /* If it starts with a colon, we want to use
-                 * the default branch */
-                if (colon == readme && repo->defbranch)
-                        *ref = xstrdup(repo->defbranch);
-                else
-                        *ref = xstrndup(readme, colon - readme);
-                readme = colon + 1;
-        }
-
-        /* Prepend repo path to relative readme path unless tracked. */
-        if (!(*ref) && *readme != '/')
-                readme = fmtalloc("%s/%s", repo->path, readme);
-
+        char *file, *base_dir, *full_path, *resolved_base = NULL, *resolved_full = NULL;
         /* If a subpath is specified for the about page, make it relative
          * to the directory containing the configured readme. */
-        if (path) {
-                slash = strrchr(readme, '/');
-                if (!slash) {
-                        if (!colon)
-                                return;
-                        slash = colon;
-                }
-                *filename = xmalloc(slash - readme + 1 + strlen(path) + 1);
-                strncpy(*filename, readme, slash - readme + 1);
-                if (!(*ref))
-                        resolved_base = realpath(*filename, NULL);
-                strcpy(*filename + (slash - readme + 1), path);
-                if (!(*ref))
-                        resolved_full = realpath(*filename, NULL);
-                if (!(*ref) && (!resolved_base || !resolved_full || strstr(resolved_full, resolved_base) != resolved_full)) {
-                        free(*filename);
-                        *filename = NULL;
-                }
-                if (!(*ref)) {
-                        free(resolved_base);
-                        free(resolved_full);
+
+        file = xstrdup(filename);
+        base_dir = dirname(file);
+        if (!strcmp(base_dir, ".") || !strcmp(base_dir, "..")) {
+                if (!ref) {
+                        free(file);
+                        return NULL;
                 }
+                full_path = xstrdup(path);
         } else
-                *filename = xstrdup(readme);
+                full_path = fmtalloc("%s/%s", base_dir, path);
+        
+        if (!ref) {
+                resolved_base = realpath(base_dir, NULL);
+                resolved_full = realpath(full_path, NULL);
+                if (!resolved_base || !resolved_full || strncmp(resolved_base, resolved_full, strlen(resolved_base))) {
+                        free(full_path);
+                        full_path = NULL;
+                }
+        }
+
+        free(file);
+        free(resolved_base);
+        free(resolved_full);
+
+        return full_path;
 }
 
 void cgit_print_repo_readme(char *path)
 {
         char *filename, *ref;
-        cgit_parse_readme(ctx.repo->readme, path, &filename, &ref, ctx.repo);
+        int free_filename = 0;
 
-        if (!filename)
+        if (ctx.repo->readme.nr == 0)
                 return;
+        
+        filename = ctx.repo->readme.items[0].string;
+        ref = ctx.repo->readme.items[0].util;
+
+        if (path) {
+                free_filename = 1;
+                filename = append_readme_path(filename, ref, path);
+                if (!filename)
+                        return;
+        }
 
         /* Print the calculated readme, either from the git repo or from the
          * filesystem, while applying the about-filter.
@@ -168,14 +157,15 @@ void cgit_print_repo_readme(char *path)
                 cgit_open_filter(ctx.repo->about_filter);
         }
         if (ref)
-                cgit_print_file(filename, ref);
+                cgit_print_file(filename, ref, 1);
         else
                 html_include(filename);
         if (ctx.repo->about_filter) {
                 cgit_close_filter(ctx.repo->about_filter);
                 ctx.repo->about_filter->argv[1] = NULL;
+        free(ref);
         }
         html("</div>");
-        free(filename);
-        free(ref);
+        if (free_filename)
+                free(filename);
 }