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PhutilLanguageGuesser.php
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Created
Sun, Aug 25, 11:28
Size
1 KB
Mime Type
text/x-php
Expires
Tue, Aug 27, 11:28 (2 d)
Engine
blob
Format
Raw Data
Handle
20166971
Attached To
rPHU libphutil
PhutilLanguageGuesser.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Very simple class to guess the languages of source files which we failed to
* determine by examining file name/extension rules.
*
* @group util
*/
final
class
PhutilLanguageGuesser
{
/**
* Guess which computer programming language a file is written in.
*
* @param string Source text of the file.
* @return mixed Language string, or null if unable to guess.
*/
public
static
function
guessLanguage
(
$source
)
{
static
$patterns
=
array
(
// Capture "#!/usr/bin/env php" sorts of things.
'@^#!.*bin/env
\s
+(
\S
+)@'
=>
1
,
// Capture "#!/usr/bin/php" sorts of things.
'@^#!.*bin/(
\S
+)@'
=>
1
,
// Capture initial "<?php", which means PHP.
'@^
\s
*<[?](php)@'
=>
1
,
// Capture emacs "mode" header.
'@^.*-[*]-.*mode
\s
*:
\s
*(
\S
+).*-[*]-.*$@m'
=>
1
,
// Look for things that seem to be diffs.
'/^---.*$
\n
^[+]{3}.*$
\n
^@@/m'
=>
'diff'
,
'/^diff --git/'
=>
'diff'
,
// Look for plausible console output.
'@^(?:
\S
+/ )?[$] @'
=>
'console'
,
);
foreach
(
$patterns
as
$pattern
=>
$language
)
{
$matches
=
null
;
if
(
preg_match
(
$pattern
,
$source
,
$matches
))
{
if
(
is_numeric
(
$language
))
{
return
$matches
[
$language
];
}
else
{
return
$language
;
}
}
}
return
null
;
}
}
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