25 lines
428 B
Nix
25 lines
428 B
Nix
{ lib, ... }:
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with lib;
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rec {
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escape =
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let
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isSafeChar = testString "[-+./0-9:=A-Z_a-z]";
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in
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x:
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if x == "" then "''"
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else stringAsChars (c:
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if isSafeChar c then c
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else if c == "\n" then "'\n'"
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else "\\${c}"
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) x;
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#
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# shell script generators
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#
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# example: "${cat (toJSON { foo = "bar"; })} | jq -r .foo"
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cat = s: "printf '%s' ${escape s}";
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}
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