16 lines
453 B
Nix
16 lines
453 B
Nix
{ pkgs ? import <nixpkgs> { } }:
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let
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inherit (pkgs.lib) fileContents last splitString flatten remove;
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inherit (builtins) map match;
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in {
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findKeyValue = regex: sourceFile:
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let
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linesFrom = file: splitString "\n" (fileContents file);
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matching = regex: lines: map (line: match regex line) lines;
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extractMatch = matches: last (flatten (remove null matches));
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in
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extractMatch (matching regex (linesFrom sourceFile));
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}
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