[gnome-continuous] versioneddir: Write index.json files

[Colin Walters <walters src gnome org>]

commit 757d8632f53709f8dc1a0ddd383508091eefa377
Author: Colin Walters <walters verbum org>
Date:   Fri Dec 27 03:33:30 2013 -0500

    versioneddir: Write index.json files
    
    These can be used by the web UI to traverse the directory.

 src/js/versioneddir.js |   37 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 36 insertions(+), 1 deletions(-)
---
diff --git a/src/js/versioneddir.js b/src/js/versioneddir.js
index c02738b..f110b41 100644
--- a/src/js/versioneddir.js
+++ b/src/js/versioneddir.js
@@ -22,6 +22,8 @@ const Format = imports.format;
 
 const GSystem = imports.gi.GSystem;
 const BuildUtil = imports.buildutil;
+const FileUtil = imports.fileutil;
+const JsonUtil = imports.jsonutil;
 
 function relpathToVersion(relpath) {
     let parts = relpath.split('/');
@@ -123,6 +125,39 @@ const VersionedDir = new Lang.Class({
        return null;
     },
 
+    _makeDirUpdateIndex: function(path, cancellable) {
+       let relpath = this.path.get_relative_path(path);
+       if (relpath == null) {
+           GSystem.file_ensure_directory(path, true, cancellable);
+           return;
+       }
+
+       let parent = path.get_parent();
+       this._makeDirUpdateIndex(parent, cancellable);
+       
+       let created = false;
+       try {
+           path.make_directory(cancellable);
+           created = true;
+       } catch (e) {
+           if (!e.matches(Gio.IOErrorEnum, Gio.IOErrorEnum.EXISTS))
+               throw e;
+       }
+       let indexJsonPath = parent.get_child('index.json');
+       if (!created)
+           created = !indexJsonPath.query_exists(null);
+       if (created) {
+           let childNames = [];
+           FileUtil.walkDir(parent, { depth: 1,
+                                      fileType: Gio.FileType.DIRECTORY },
+                            Lang.bind(this, function(filePath, cancellable) {
+                                childNames.push(filePath.get_basename());
+                            }), cancellable);
+           JsonUtil.writeJsonFileAtomic(indexJsonPath,
+                                        { 'subdirs': childNames }, cancellable);
+       }
+    },
+
     allocateNewVersion: function(cancellable) {
         let currentTime = GLib.DateTime.new_now_utc();
         let currentYmd = Format.vprintf('%d%02d%02d', [currentTime.get_year(),
@@ -143,7 +178,7 @@ const VersionedDir = new Lang.Class({
        if (newVersion === null)
            newVersion = currentYmd + '.0';
        let path = this.createPathForVersion(newVersion);
-        GSystem.file_ensure_directory(path, true, cancellable);
+       this._makeDirUpdateIndex(path, cancellable);
        this._cachedResults.push(newVersion);
        return path;
     },