5edd4dd44c
... as suggested by @roberth This also caught a bug in rendering lists, which this change also fixes
52 lines
1.4 KiB
Nix
52 lines
1.4 KiB
Nix
{ lib }:
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{ /* Automatically convert an attribute set to command-line options.
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This helps protect against malformed command lines and also to reduce
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boilerplate related to command-line construction for simple use cases.
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Example:
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encodeGNUCommandLine
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{ }
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{ data = builtins.toJSON { id = 0; };
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X = "PUT";
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retry = 3;
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retry-delay = null;
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url = [ "https://example.com/foo" "https://example.com/bar" ];
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silent = false;
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verbose = true;
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};
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=> " -X 'PUT' --data '{\"id\":0}' --retry '3' --url 'https://example.com/foo' --url 'https://example.com/bar' --verbose"
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*/
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encodeGNUCommandLine =
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{ renderKey ?
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key: if builtins.stringLength key == 1 then "-${key}" else "--${key}"
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, renderOption ?
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key: value:
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if value == null
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then ""
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else " ${renderKey key} ${lib.escapeShellArg value}"
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, renderBool ? key: value: if value then " ${renderKey key}" else ""
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, renderList ? key: value: lib.concatMapStrings (renderOption key) value
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}:
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options:
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let
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render = key: value:
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if builtins.isBool value
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then renderBool key value
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else if builtins.isList value
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then renderList key value
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else renderOption key value;
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in
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lib.concatStrings (lib.mapAttrsToList render options);
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}
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