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Merge pull request #124739 from SFrijters/doc-fetchpatch 

doc/coding-conventions: Add documentation for fetchpatch optional arguments
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Maximilian Bosch 2021-05-28 22:13:11 +02:00 committed by GitHub
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10
doc/contributing/coding-conventions.chapter.md
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@ -526,6 +526,16 @@ If you do need to do create this sort of patch file, one way to do so is with gi
$ git diff > nixpkgs/pkgs/the/package/0001-changes.patch
```
If a patch is available online but does not cleanly apply, it can be modified in some fixed ways by using additional optional arguments for `fetchpatch`:
- `stripLen`: Remove the first `stripLen` components of pathnames in the patch.
- `extraPrefix`: Prefix pathnames by this string.
- `excludes`: Exclude files matching this pattern.
- `includes`: Include only files matching this pattern.
- `revert`: Revert the patch.
Note that because the checksum is computed after applying these effects, using or modifying these arguments will have no effect unless the `sha256` argument is changed as well.
## Package tests {#sec-package-tests}
Tests are important to ensure quality and make reviews and automatic updates easy.