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## Why Updating a file with `apply_patch` historically normalized its contents to LF, which can rewrite line endings outside the requested change. ## What changed - Add an opt-in `PreserveLineEndings` update mode and thread it through patch verification, application, and the standalone executable. Existing APIs keep the LF-normalizing mode by default. - Retain the original endings of untouched and context lines, including in mixed-ending files, and use the file's first line ending for inserted or replaced lines. - Track patch context separately from identical changed lines so preservation does not alter replacement ordering or matching. ## Testing Add coverage for CRLF, CR, mixed endings, trailing blank lines, repeated lines, EOF overlap rejection, and legacy LF normalization. GitOrigin-RevId: 085f0cbc57e0965aa62c6a2d0e80870424e762f5
Overview
This directory is a collection of end to end tests for the apply-patch specification, meant to be easily portable to other languages or platforms.
Specification
Each test case is one directory, composed of input state (input/), the patch operation (patch.txt), and the expected final state (expected/). This structure is designed to keep tests simple (i.e. test exactly one patch at a time) while still providing enough flexibility to test any given operation across files.
Here's what this would look like for a simple test apply-patch test case to create a new file:
001_add/
input/
foo.md
expected/
foo.md
bar.md
patch.txt