Luke Granger-Brown
57725ef3ec
git-subtree-dir: third_party/nixpkgs git-subtree-split: 76612b17c0ce71689921ca12d9ffdc9c23ce40b2
85 lines
2.1 KiB
Nix
85 lines
2.1 KiB
Nix
{ lib, pkgs, formats, runCommand }:
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let
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inherit (lib)
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last
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optionalString
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types
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;
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in
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{
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/**
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Creates a transformer function that writes input data to disk, transformed
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by both the `input` and `output` arguments.
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# Example
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```nix
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writeJSON = makeDataWriter { input = builtins.toJSON; output = "cp $inputPath $out"; };
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myConfig = writeJSON "config.json" { hello = "world"; }
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```
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# Type
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```
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makeDataWriter :: input -> output -> nameOrPath -> data -> (any -> string) -> string -> string -> any -> derivation
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input :: T -> string: function that takes the nix data and returns a string
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output :: string: script that takes the $inputFile and write the result into $out
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nameOrPath :: string: if the name contains a / the files gets written to a sub-folder of $out. The derivation name is the basename of this argument.
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data :: T: the data that will be converted.
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```
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*/
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makeDataWriter = lib.warn "pkgs.writers.makeDataWriter is deprecated. Use pkgs.writeTextFile." ({ input ? lib.id, output ? "cp $inputPath $out" }: nameOrPath: data:
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assert (types.path.check nameOrPath) || (builtins.match "([0-9A-Za-z._])[0-9A-Za-z._-]*" nameOrPath != null);
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let
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name = last (builtins.split "/" nameOrPath);
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in
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runCommand name
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{
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input = input data;
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passAsFile = [ "input" ];
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} ''
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${output}
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${optionalString (types.path.check nameOrPath) ''
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mv $out tmp
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mkdir -p $out/$(dirname "${nameOrPath}")
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mv tmp $out/${nameOrPath}
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''}
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'');
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inherit (pkgs) writeText;
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/**
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Writes the content to a JSON file.
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# Example
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```nix
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writeJSON "data.json" { hello = "world"; }
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```
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*/
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writeJSON = (pkgs.formats.json {}).generate;
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/**
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Writes the content to a TOML file.
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# Example
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```nix
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writeTOML "data.toml" { hello = "world"; }
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```
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*/
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writeTOML = (pkgs.formats.toml {}).generate;
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/**
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Writes the content to a YAML file.
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# Example
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```nix
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writeYAML "data.yaml" { hello = "world"; }
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```
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*/
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writeYAML = (pkgs.formats.yaml {}).generate;
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}
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