76 lines
1.9 KiB
PHP
76 lines
1.9 KiB
PHP
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<?php
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namespace MediaWiki\Diff\TextDiffer;
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use MediaWiki\Shell\Shell;
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use RuntimeException;
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/**
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* @since 1.41
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*/
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class ExternalTextDiffer extends BaseTextDiffer {
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/** @var string */
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private $externalPath;
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/**
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* @param string $externalPath The path to the executable file which provides the diff
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*/
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public function __construct( $externalPath ) {
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$this->externalPath = $externalPath;
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}
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public function getName(): string {
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return 'external';
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}
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public function getFormats(): array {
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return [ 'external' ];
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}
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public function getFormatContext( string $format ) {
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return self::CONTEXT_ROW;
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}
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protected function doRenderBatch( string $oldText, string $newText, array $formats ): array {
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return [ 'external' => $this->doRender( $oldText, $newText ) ];
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}
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/**
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* @param string $oldText
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* @param string $newText
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* @return string
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*/
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private function doRender( $oldText, $newText ) {
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$tmpDir = wfTempDir();
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$tempName1 = tempnam( $tmpDir, 'diff_' );
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$tempName2 = tempnam( $tmpDir, 'diff_' );
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$tempFile1 = fopen( $tempName1, "w" );
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if ( !$tempFile1 ) {
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throw new RuntimeException( "Could not create temporary file $tempName1 for external diffing" );
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}
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$tempFile2 = fopen( $tempName2, "w" );
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if ( !$tempFile2 ) {
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throw new RuntimeException( "Could not create temporary file $tempName2 for external diffing" );
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}
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fwrite( $tempFile1, $oldText );
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fwrite( $tempFile2, $newText );
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fclose( $tempFile1 );
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fclose( $tempFile2 );
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$cmd = [ $this->externalPath, $tempName1, $tempName2 ];
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$result = Shell::command( $cmd )
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->execute();
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$exitCode = $result->getExitCode();
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if ( $exitCode !== 0 ) {
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throw new RuntimeException( "External diff command returned code {$exitCode}. Stderr: "
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. wfEscapeWikiText( $result->getStderr() )
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);
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}
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$diffText = $result->getStdout();
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unlink( $tempName1 );
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unlink( $tempName2 );
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return $diffText;
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}
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}
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