Verified Commit aa675a94 authored by Andrei Mateescu's avatar Andrei Mateescu
Browse files

fix: #3389715 Diffs with different line endings leads to Invalid $mode 3 specified 

By: mstrelan
By: larowlan
By: mondrake
By: atropoides
By: longwave
By: amateescu
(cherry picked from commit cc28583d)
parent 099d9a4a

core/lib/Drupal/Component/Diff/DiffOpOutputBuilder.php

+8 −0
Original line number Diff line number Diff line
@@ -44,6 +44,14 @@ public function toOpsArray(array $diff): array { 


    for ($i = 0; $i < count($diff); $i++) {



      // Differ prepends a warning pseudo-line when source and target use

      // different end of line markings. Skip it: no DiffOp represents a

      // warning, and keeping it would output a line absent from both inputs.

      // The lines it warns about are still reported as changes below.

      if ($diff[$i][1] === Differ::DIFF_LINE_END_WARNING) {

        continue;

      }



      // Handle a sequence of removals + additions as a sequence of changes, and

      // manages the tail if required.

      if ($diff[$i][1] === Differ::REMOVED) {

core/tests/Drupal/Tests/Component/Diff/DiffFormatterTest.php

+18 −0
Original line number Diff line number Diff line
@@ -42,6 +42,24 @@ public static function provideTestDiff(): array { 
        ['line1', 'line2', 'line2a', 'line3'],

        ['line1', 'line2', 'line2b', 'line3'],

      ],

      // Lines are compared including their end of line markings, so lines

      // differing only by those are a change. Differ's mismatched line ending

      // warning is not part of the output.

      'change, line endings differ' => [

        "1c1\n< foo\r\n\n---\n> foo\n\n",

        ["foo\r\n"],

        ["foo\n"],

      ],

      'change, line endings differ on multiple lines' => [

        "1,2c1,2\n< line1\r\n\n< line2\r\n\n---\n> line1\n\n> line2\n\n",

        ["line1\r\n", "line2\r\n"],

        ["line1\n", "line2\n"],

      ],

      'copy, line endings match' => [

        '',

        ["foo\r\n"],

        ["foo\r\n"],

      ],

    ];

  }

core/tests/Drupal/Tests/Component/Diff/DiffOpOutputBuilderTest.php

+19 −0
Original line number Diff line number Diff line
@@ -88,6 +88,25 @@ public static function provideTestDiff(): array { 
        ['a', 'bb', 'd', 'ee'],

        ['a', 'b', 'c', 'd', 'e'],

      ],

      // Differ prepends a line end warning when source and target use

      // different end of line markings. It is skipped, the lines are a change.

      'line end warning' => [

        [new DiffOpChange(["foo\r\n"], ["foo\n"])],

        ["foo\r\n"],

        ["foo\n"],

      ],

      'line end warning, multiple lines' => [

        [new DiffOpChange(["line1\r\n", "line2\r\n"], ["line1\n", "line2\n"])],

        ["line1\r\n", "line2\r\n"],

        ["line1\n", "line2\n"],

      ],

      // No warning is raised when both sides use the same end of line

      // markings.

      'consistent line ends' => [

        [new DiffOpCopy(["foo\r\n"])],

        ["foo\r\n"],

        ["foo\r\n"],

      ],

    ];

  }