tests/test-hgweb-no-path-info.t

lfs: autoload the extension when cloning from repo with lfs enabled

This is based on a patch by Gregory Szorc.  I made small adjustments to
clean up the messaging when the server has the extension enabled, but the
client has it disabled (to prevent autoloading).  Additionally, I added
a second server capability to distinguish between the server having the
extension enabled, and the server having LFS commits.  This helps prevent
unnecessary requirement propagation- the client shouldn't add a requirement
that the server doesn't have, just because the server had the extension
loaded.  The TODO I had about advertising a capability when the server can
natively serve up blobs isn't relevant anymore (we've had 2 releases that
support this), so I dropped it.

Currently, we lazily add the "lfs" requirement to a repo when we first
encounter LFS data. Due to a pretxnchangegroup hook that looks for LFS
data, this can happen at the end of clone.

Now that we have more control over how repositories are created, we can
do better.

This commit adds a repo creation option to add the "lfs" requirement.
hg.clone() sets this creation option if the remote peer is advertising
lfs usage (as opposed to just support needed to push).

So, what this change effectively does is have cloned repos
automatically inherit the "lfs" requirement.

Differential Revision: https://phab.mercurial-scm.org/D5130

This tests if hgweb and hgwebdir still work if the REQUEST_URI variable is
no longer passed with the request. Instead, SCRIPT_NAME and PATH_INFO
should be used from d74fc8dec2b4 onward to route the request.

  $ hg init repo
  $ cd repo
  $ echo foo > bar
  $ hg add bar
  $ hg commit -m "test"
  $ hg tip
  changeset:   0:61c9426e69fe
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     test
  
  $ cat > request.py <<EOF
  > from __future__ import absolute_import
  > import os
  > import sys
  > from mercurial import (
  >     hgweb,
  >     util,
  > )
  > stringio = util.stringio
  > 
  > errors = stringio()
  > input = stringio()
  > 
  > def startrsp(status, headers):
  >     print('---- STATUS')
  >     print(status)
  >     print('---- HEADERS')
  >     print([i for i in headers if i[0] != 'ETag'])
  >     print('---- DATA')
  >     sys.stdout.flush()
  >     return output.write
  > 
  > env = {
  >     'wsgi.version': (1, 0),
  >     'wsgi.url_scheme': 'http',
  >     'wsgi.errors': errors,
  >     'wsgi.input': input,
  >     'wsgi.multithread': False,
  >     'wsgi.multiprocess': False,
  >     'wsgi.run_once': False,
  >     'REQUEST_METHOD': 'GET',
  >     'PATH_INFO': '/',
  >     'SCRIPT_NAME': '',
  >     'SERVER_NAME': '$LOCALIP',
  >     'SERVER_PORT': os.environ['HGPORT'],
  >     'SERVER_PROTOCOL': 'HTTP/1.0'
  > }
  > 
  > def process(app):
  >     try:
  >         stdout = sys.stdout.buffer
  >     except AttributeError:
  >         stdout = sys.stdout
  >     content = app(env, startrsp)
  >     stdout.write(output.getvalue())
  >     stdout.write(b''.join(content))
  >     stdout.flush()
  >     getattr(content, 'close', lambda : None)()
  >     if errors.getvalue():
  >         print('---- ERRORS')
  >         print(errors.getvalue())
  >     sys.stdout.flush()
  > 
  > output = stringio()
  > env['QUERY_STRING'] = 'style=atom'
  > process(hgweb.hgweb(b'.', name=b'repo'))
  > 
  > output = stringio()
  > env['QUERY_STRING'] = 'style=raw'
  > process(hgweb.hgwebdir({b'repo': b'.'}))
  > EOF
  $ "$PYTHON" request.py
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'application/atom+xml; charset=ascii')]
  ---- DATA
  <?xml version="1.0" encoding="ascii"?>
  <feed xmlns="http://www.w3.org/2005/Atom">
   <!-- Changelog -->
   <id>http://$LOCALIP:$HGPORT/</id> (glob)
   <link rel="self" href="http://$LOCALIP:$HGPORT/atom-log"/> (glob)
   <link rel="alternate" href="http://$LOCALIP:$HGPORT/"/> (glob)
   <title>repo Changelog</title>
   <updated>1970-01-01T00:00:00+00:00</updated>
  
   <entry>
    <title>[default] test</title>
    <id>http://$LOCALIP:$HGPORT/#changeset-61c9426e69fef294feed5e2bbfc97d39944a5b1c</id> (glob)
    <link href="http://$LOCALIP:$HGPORT/rev/61c9426e69fe"/> (glob)
    <author>
     <name>test</name>
     <email>&#116;&#101;&#115;&#116;</email>
    </author>
    <updated>1970-01-01T00:00:00+00:00</updated>
    <published>1970-01-01T00:00:00+00:00</published>
    <content type="xhtml">
     <table xmlns="http://www.w3.org/1999/xhtml">
      <tr>
       <th style="text-align:left;">changeset</th>
       <td>61c9426e69fe</td>
      </tr>
      <tr>
       <th style="text-align:left;">branch</th>
       <td>default</td>
      </tr>
      <tr>
       <th style="text-align:left;">bookmark</th>
       <td></td>
      </tr>
      <tr>
       <th style="text-align:left;">tag</th>
       <td>tip</td>
      </tr>
      <tr>
       <th style="text-align:left;">user</th>
       <td>&#116;&#101;&#115;&#116;</td>
      </tr>
      <tr>
       <th style="text-align:left;vertical-align:top;">description</th>
       <td>test</td>
      </tr>
      <tr>
       <th style="text-align:left;vertical-align:top;">files</th>
       <td>bar<br /></td>
      </tr>
     </table>
    </content>
   </entry>
  
  </feed>
  ---- STATUS
  200 Script output follows
  ---- HEADERS
  [('Content-Type', 'text/plain; charset=ascii')]
  ---- DATA
  
  /repo/
  

  $ cd ..