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composer
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Merge branch '1.8'

pull/8017/head
Jordi Boggiano 2019-02-16 17:56:20 +01:00
parent a3eb6c4389 d9f873d00e
commit 69745745b3
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GPG Key ID: 7BBD42C429EC80BC
4 changed files with 64 additions and 14 deletions
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2
appveyor.yml
View File

@ -3,7 +3,7 @@ clone_depth: 5
environment:
# This sets the PHP version (from Chocolatey)
PHPCI_CHOCO_VERSION: 7.2.9
PHPCI_CHOCO_VERSION: 7.3.1
PHPCI_CACHE: C:\tools\phpci
PHPCI_PHP: C:\tools\phpci\php
PHPCI_COMPOSER: C:\tools\phpci\composer

5
bin/composer
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@ -18,6 +18,11 @@ $xdebug = new XdebugHandler('Composer', '--ansi');
$xdebug->check();
unset($xdebug);
if (defined('HHVM_VERSION') && version_compare(HHVM_VERSION, '4.0', '>=')) {
echo 'HHVM 4.0 has dropped support for Composer, please use PHP instead. Aborting.'.PHP_EOL;
exit(1);
}
if (function_exists('ini_set')) {
@ini_set('display_errors', 1);

30
src/Composer/Downloader/PathDownloader.php
View File

@ -82,6 +82,12 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
$allowedStrategies = array(self::STRATEGY_MIRROR);
}
// Check we can use junctions safely if we are on Windows
if (Platform::isWindows() && self::STRATEGY_SYMLINK === $currentStrategy && !$this->safeJunctions()) {
$currentStrategy = self::STRATEGY_MIRROR;
$allowedStrategies = array(self::STRATEGY_MIRROR);
}
$fileSystem = new Filesystem();
$this->filesystem->removeDirectory($path);
@ -172,4 +178,28 @@ class PathDownloader extends FileDownloader implements VcsCapableDownloaderInter
return $packageVersion['commit'];
}
}
/**
* Returns true if junctions can be safely used on Windows
*
* A PHP bug makes junction detection fragile, leading to possible data loss
* when removing a package. See https://bugs.php.net/bug.php?id=77552
*
* For safety we require a minimum version of Windows 7, so we can call the
* system rmdir which can detect junctions and not delete target content.
*
* @return bool
*/
private function safeJunctions()
{
// Bug fixed in 7.3.3 and 7.2.16
if (PHP_VERSION_ID >= 70303 || (PHP_VERSION_ID >= 70216 && PHP_VERSION_ID < 70300)) {
return true;
}
// Windows 7 is version 6.1
return function_exists('proc_open') &&
(PHP_WINDOWS_VERSION_MAJOR > 6 ||
(PHP_WINDOWS_VERSION_MAJOR === 6 && PHP_WINDOWS_VERSION_MINOR >= 1));
}
}

41
src/Composer/Util/Filesystem.php
View File

@ -199,9 +199,15 @@ class Filesystem
*/
public function unlink($path)
{
if (!@$this->unlinkImplementation($path)) {
$unlinked = @$this->unlinkImplementation($path);
if (!$unlinked) {
// retry after a bit on windows since it tends to be touchy with mass removals
if (!Platform::isWindows() || (usleep(350000) && !@$this->unlinkImplementation($path))) {
if (Platform::isWindows()) {
usleep(350000);
$unlinked = @$this->unlinkImplementation($path);
}
if (!$unlinked) {
$error = error_get_last();
$message = 'Could not delete '.$path.': ' . @$error['message'];
if (Platform::isWindows()) {
@ -224,9 +230,15 @@ class Filesystem
*/
public function rmdir($path)
{
if (!@rmdir($path)) {
$deleted = @rmdir($path);
if (!$deleted) {
// retry after a bit on windows since it tends to be touchy with mass removals
if (!Platform::isWindows() || (usleep(350000) && !@rmdir($path))) {
if (Platform::isWindows()) {
usleep(350000);
$deleted = @rmdir($path);
}
if (!$deleted) {
$error = error_get_last();
$message = 'Could not delete '.$path.': ' . @$error['message'];
if (Platform::isWindows()) {
@ -650,12 +662,17 @@ class Filesystem
*
* We test if the path is a directory and not an ordinary link, then check
* that the mode value returned from lstat (which gives the status of the
* link itself) is not a directory.
* link itself) is not a directory, by replicating the POSIX S_ISDIR test.
*
* This relies on the fact that PHP does not set this value because there is
* no universal file type flag for a junction or a mount point. However a
* bug in PHP can cause a random value to be returned and this could result
* in a junction not being detected: https://bugs.php.net/bug.php?id=77552
* This logic works because PHP does not set the mode value for a junction,
* since there is no universal file type flag for it. Unfortunately an
* uninitialized variable in PHP prior to 7.2.16 and 7.3.3 may cause a
* random value to be returned. See https://bugs.php.net/bug.php?id=77552
*
* If this random value passes the S_ISDIR test, then a junction will not be
* detected and a recursive delete operation could lead to loss of data in
* the target directory. Note that Windows rmdir can handle this situation
* and will only delete the junction (from Windows 7 onwards).
*
* @param string $junction Path to check.
* @return bool
@ -673,7 +690,7 @@ class Filesystem
clearstatcache(true, $junction);
$stat = lstat($junction);
// S_IFDIR is 0x4000, S_IFMT is the 0xF000 bitmask
// S_ISDIR test (S_IFDIR is 0x4000, S_IFMT is 0xF000 bitmask)
return $stat ? 0x4000 !== ($stat['mode'] & 0xF000) : false;
}
@ -692,9 +709,7 @@ class Filesystem
if (!$this->isJunction($junction)) {
throw new IOException(sprintf('%s is not a junction and thus cannot be removed as one', $junction));
}
$cmd = sprintf('rmdir /S /Q %s', ProcessExecutor::escape($junction));
clearstatcache(true, $junction);
return ($this->getProcess()->execute($cmd, $output) === 0);
return $this->rmdir($junction);
}
}