49 lines
2.2 KiB
Markdown
49 lines
2.2 KiB
Markdown
# pkgs.nix-gitignore {#sec-pkgs-nix-gitignore}
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`pkgs.nix-gitignore` is a function that acts similarly to `builtins.filterSource` but also allows filtering with the help of the gitignore format.
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## Usage {#sec-pkgs-nix-gitignore-usage}
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`pkgs.nix-gitignore` exports a number of functions, but you'll most likely need either `gitignoreSource` or `gitignoreSourcePure`. As their first argument, they both accept either 1. a file with gitignore lines or 2. a string with gitignore lines, or 3. a list of either of the two. They will be concatenated into a single big string.
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```nix
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{ pkgs ? import <nixpkgs> {} }:
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nix-gitignore.gitignoreSource [] ./source
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# Simplest version
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nix-gitignore.gitignoreSource "supplemental-ignores\n" ./source
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# This one reads the ./source/.gitignore and concats the auxiliary ignores
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nix-gitignore.gitignoreSourcePure "ignore-this\nignore-that\n" ./source
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# Use this string as gitignore, don't read ./source/.gitignore.
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nix-gitignore.gitignoreSourcePure ["ignore-this\nignore-that\n", ~/.gitignore] ./source
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# It also accepts a list (of strings and paths) that will be concatenated
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# once the paths are turned to strings via readFile.
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```
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These functions are derived from the `Filter` functions by setting the first filter argument to `(_: _: true)`:
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```nix
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gitignoreSourcePure = gitignoreFilterSourcePure (_: _: true);
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gitignoreSource = gitignoreFilterSource (_: _: true);
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```
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Those filter functions accept the same arguments the `builtins.filterSource` function would pass to its filters, thus `fn: gitignoreFilterSourcePure fn ""` should be extensionally equivalent to `filterSource`. The file is blacklisted if it's blacklisted by either your filter or the gitignoreFilter.
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If you want to make your own filter from scratch, you may use
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```nix
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gitignoreFilter = ign: root: filterPattern (gitignoreToPatterns ign) root;
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```
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## gitignore files in subdirectories {#sec-pkgs-nix-gitignore-usage-recursive}
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If you wish to use a filter that would search for .gitignore files in subdirectories, just like git does by default, use this function:
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```nix
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gitignoreFilterRecursiveSource = filter: patterns: root:
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# OR
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gitignoreRecursiveSource = gitignoreFilterSourcePure (_: _: true);
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```
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