= Live branches =

'''Show branch content within the main web application, rather than sequestered on bazaar.l.n'''

This is intended to mesh with [[ArchitectureGuide/ServicesRoadmap]].

Moving parts:

 * loggerhead serves machine-readable branch content (files, diffs, revision metadata, etc)
 * same-origin proxy that republishes this through code.launchpad.net (probably in Apache)
 * javascript updates to show content within the page
 * branch page redesign to make it work well

New things to show on the branch page:

 * per-revision lists of changed file
 * per-revision diffs
 * files in the tip of the branch
 * more than the 10 most recent revisions

Operational changes:
 * add rewrite/proxy rules on nutmeg/banana front-end apaches
 * possible firewall changes to allow that proxying to occur
 * robots.txt should block access to the proxied urls

Issues:
 
 * republished information must be safe against xss-type attacks from user content

Specific work items:

 * return JSON from loggerhead (currently returns HTML snippets)
   * `lp:~spiv/loggerhead/jsonify`
   * Done by including `+json`, eg `branch/+json/+revlog/$REVID`
   * URLs handled: `/+revlog`, `/+filediff`, `/files`, `/revision`
   * URLs already returning raw content: `/diff`, `/download`
   * URLs being skipped: `DirEntry`, `/changes`, `/view`, `/atom`, `/search`
   * URLs needing significant changes: `/annotate`
 * proxy data from loggerhead through on https://code.launchpad.net/ (lp:~jelmer/launchpad/apache-config-loggerhead)
 * in Launchpad add javascript (i.e. client-side) templating/rendering of that JSON content.  Use hidden HTML node in page, copy and populate with values from JSON, add new node to page.
    * `lp:~jtv/launchpad/expand-diffs` to render the existing /diff (not using JSON yet)