match: introduce boolean prefix() method
tl;dr: This is another step towards a (previously unstated) goal of
eliminating match.files() in conditions.
There are four types of matchers:
* always: Matches everything, checked with always(), files() is empty
* exact: Matches exact set of files, checked with isexact(), files()
contains the files to match
* patterns: Matches more complex patterns, checked with anypats(),
files() contains roots of the matched patterns
* prefix: Matches simple 'path:' patterns as prefixes ('foo' matches
both 'foo' and 'foo/bar'), no single method to check, files()
contains the prefixes to match
For completeness, it would be nice to have a method for checking for
the "prefix" type of matcher as well, so let's add that, making it
return True simply when none of the others do.
The larger goal here is to eliminate uses of match.files() in
conditions (i.e. bool(match.files())). The reason for this is that
there are scenarios when you would like to create a "prefix" matcher
that happens to match no files. One example is for 'hg files -I foo
bar'. The narrowmatcher also restricts the set of files given and it
would not surprise me if have bugs caused by that already. Note that
'if m.files() and not m.anypats()' and similar is sometimes used to
catch the "exact" and "prefix" cases above.
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 mercurial.hgweb import hgweb, hgwebdir
> from StringIO import StringIO
> import os, sys
>
> 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'
> 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': '127.0.0.1',
> 'SERVER_PORT': os.environ['HGPORT'],
> 'SERVER_PROTOCOL': 'HTTP/1.0'
> }
>
> def process(app):
> content = app(env, startrsp)
> sys.stdout.write(output.getvalue())
> sys.stdout.write(''.join(content))
> getattr(content, 'close', lambda : None)()
> print '---- ERRORS'
> print errors.getvalue()
>
> output = StringIO()
> env['QUERY_STRING'] = 'style=atom'
> process(hgweb('.', name='repo'))
>
> output = StringIO()
> env['QUERY_STRING'] = 'style=raw'
> process(hgwebdir({'repo': '.'}))
> 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://127.0.0.1:$HGPORT/</id>
<link rel="self" href="http://127.0.0.1:$HGPORT/atom-log"/>
<link rel="alternate" href="http://127.0.0.1:$HGPORT/"/>
<title>repo Changelog</title>
<updated>1970-01-01T00:00:00+00:00</updated>
<entry>
<title>[default] test</title>
<id>http://127.0.0.1:$HGPORT/#changeset-61c9426e69fef294feed5e2bbfc97d39944a5b1c</id>
<link href="http://127.0.0.1:$HGPORT/rev/61c9426e69fe"/>
<author>
<name>test</name>
<email>test</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>test</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>
---- ERRORS
---- STATUS
200 Script output follows
---- HEADERS
[('Content-Type', 'text/plain; charset=ascii')]
---- DATA
/repo/
---- ERRORS
$ cd ..