8000 [Filesystem] Fixed makePathRelative by ausi · Pull Request #22321 · symfony/symfony · GitHub
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[Filesystem] Fixed makePathRelative #22321

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[Filesystem] Fixed makePathRelative #22321

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fc745f4
Remove unnecessary if construct
ausi Apr 6, 2017
3a29c1d
Do not strip the beginning of relative paths, only drive letters
ausi Apr 6, 2017
15982d4
Normalize ./ path segments
ausi Apr 6, 2017
9586e88
Do not strip ../ segments from the beginning of relative paths
ausi Apr 6, 2017
cec473e
Fix parameter description
ausi Apr 6, 2017
1b795d7
Fixed compatibility with PHP 5.3
ausi Apr 7, 2017
fea3bb0
Fixed coding style
ausi Apr 7, 2017
28b29ee
Fixed compatibility with PHP 5.3
ausi Apr 7, 2017
193cdf8
Revert "Fix parameter description"
ausi Aug 9, 2017
bce33c4
Don’t use substr()
ausi Sep 14, 2017
23b4a56
Coding style
ausi Sep 14, 2017
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42 changes: 20 additions & 22 deletions src/Symfony/Component/Filesystem/Filesystem.php
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Original file line number Diff line number Diff line change
Expand Up @@ -358,34 +358,37 @@ public function makePathRelative($endPath, $startPath)
$startPath = str_replace('\\', '/', $startPath);
}

$stripDriveLetter = function ($path) {
if (strlen($path) > 2 && ':' === $path[1] && '/' === $path[2] && ctype_alpha($path[0])) {
return substr($path, 2);
}

return $path;
};

$endPath = $stripDriveLetter($endPath);
$startPath = $stripDriveLetter($startPath);

// Split the paths into arrays
$startPathArr = explode('/', trim($startPath, '/'));
$endPathArr = explode('/', trim($endPath, '/'));

if ('/' !== $startPath[0]) {
array_shift($startPathArr);
}

if ('/' !== $endPath[0]) {
array_shift($endPathArr);
}

$normalizePathArray = function ($pathSegments) {
$normalizePathArray = function ($pathSegments, $absolute) {
$result = array();

foreach ($pathSegments as $segment) {
if ('..' === $segment) {
if ('..' === $segment && ($absolute || count($result))) {
array_pop($result);
} else {
} elseif ('.' !== $segment) {
$result[] = $segment;
}
}

return $result;
};

$startPathArr = $normalizePathArray($startPathArr);
$endPathArr = $normalizePathArray($endPathArr);
$startPathArr = $normalizePathArray($startPathArr, static::isAbsolutePath($startPath));
$endPathArr = $normalizePathArray($endPathArr, static::isAbsolutePath($endPath));

// Find for which directory the common path stops
$index = 0;
Expand All @@ -394,19 +397,14 @@ public function makePathRelative($endPath, $startPath)
}

// Determine how deep the start path is relative to the common path (ie, "web/bundles" = 2 levels)
if (count($startPathArr) === 1 && $startPathArr[0] === '') {
if (1 === count($startPathArr) && '' === $startPathArr[0]) {
$depth = 0;
} else {
$depth = count($startPathArr) - $index;
}

// When we need to traverse from the start, and we are starting from a root path, don't add '../'
if ('/' === $startPath[0] && 0 === $index && 0 === $depth) {
$traverser = '';
} else {
// Repeated "../" for each level need to reach the common path
$traverser = str_repeat('../', $depth);
}
// Repeated "../" for each level need to reach the common path
$traverser = str_repeat('../', $depth);

$endPathRemainder = implode('/', array_slice($endPathArr, $index));

Expand Down Expand Up @@ -500,7 +498,7 @@ public function isAbsolutePath($file)
{
return strspn($file, '/\\', 0, 1)
|| (strlen($file) > 3 && ctype_alpha($file[0])
&& substr($file, 1, 1) === ':'
&& ':' === substr($file, 1, 1)
&& strspn($file, '/\\', 2, 1)
)
|| null !== parse_url($file, PHP_URL_SCHEME)
Expand Down
12 changes: 12 additions & 0 deletions src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
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Original file line number Diff line number Diff line change
Expand Up @@ -847,6 +847,7 @@ public function providePathsForMakePathRelative()
array('/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component/', '../'),
array('var/lib/symfony/', 'var/lib/symfony/src/Symfony/Component', '../../../'),
array('/usr/lib/symfony/', '/var/lib/symfony/src/Symfony/Component', '../../../../../../usr/lib/symfony/'),
array(' 8000 usr/lib/symfony/', 'var/lib/symfony/src/Symfony/Component', '../../../../../../usr/lib/symfony/'),
array('/var/lib/symfony/src/Symfony/', '/var/lib/symfony/', 'src/Symfony/'),
array('/aa/bb', '/aa/bb', './'),
array('/aa/bb', '/aa/bb/', './'),
Expand Down Expand Up @@ -878,6 +879,17 @@ public function providePathsForMakePathRelative()
array('C:/aa/bb/../../cc', 'C:/aa/../dd/..', 'cc/'),
array('C:/../aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'),
array('C:/../../aa/../bb/cc', 'C:/aa/dd/..', '../bb/cc/'),
array('aa/bb', 'aa/cc', '../bb/'),
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This is not something that is supported. The docblock states that the paths have to be absolute.

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There was already an existing unit test (FilesystemTest.php:1097) that tested relative paths.

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Let's not add new ones. Tests should respect the contract which is to pass an absolute path.

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@chalasr the function always supported relative paths (before 3.2.7). There are even pre-existing test cases for that.

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Tests should respect the contract which is to pass an absolute path.

@chalasr Should I remove the pre-existing relative path tests then too? Or should I just remove the relative path tests that I added?

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Can you please provide a new link to this test? Previous one is outdated and I can't find it

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Yes, it’s line 1102 in the current master branch:

symfony/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php

Line 1102 in 8088661

array('var/lib/symfony/', 'var/lib/symfony/src/Symfony/Component', '../../../'),

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Indeed, it should be removed (we did revert a similar test for the very same reason #22133 (comment)). It's safe to do it here I think.

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Done in a2a1d0d

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@chalasr Actually, the example that you gave was a test I mistakenly added in that very same PR. So it was never part of a merge. :)

array('aa/cc', 'bb/cc', '../../aa/cc/'),
array('aa/bb', 'aa/./cc', '../bb/'),
array('aa/./bb', 'aa/cc', '../bb/'),
array('aa/./bb', 'aa/./cc', '../bb/'),
array('../../', '../../', './'),
array('../aa/bb/', 'aa/bb/', '../../../aa/bb/'),
array('../../../', '../../', '../'),
array('', '', './'),
array('', 'aa/', '../'),
array('aa/', '', 'aa/'),
);

if ('\\' === DIRECTORY_SEPARATOR) {
Expand Down
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