e71e1be859
Mirrors the naming scheme in `generators.nix`, for consistency. Also rename `key` to `k` and value to `v` to aid readability to the code structure.
69 lines
1.9 KiB
Nix
69 lines
1.9 KiB
Nix
{ lib }:
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rec {
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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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`toGNUCommandLine` returns a list of nix strings.
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`toGNUCommandLineShell` returns an escaped shell string.
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Example:
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cli.toGNUCommandLine {} {
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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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=> [
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"-X" "PUT"
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"--data" "{\"id\":0}"
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"--retry" "3"
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"--url" "https://example.com/foo"
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"--url" "https://example.com/bar"
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"--verbose"
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]
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cli.toGNUCommandLineShell {} {
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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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toGNUCommandLineShell =
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options: attrs: lib.escapeShellArgs (toGNUCommandLine options attrs);
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toGNUCommandLine =
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{ mkKey ?
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k: if builtins.stringLength k == 1
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then "-${k}"
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else "--${k}"
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, mkOption ?
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k: v: if v == null
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then []
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else [ (mkKey k) (builtins.toString v) ]
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, mkBool ? k: v: lib.optional v (mkKey k)
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, mkList ? k: v: lib.concatMap (mkOption k) v
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}:
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options:
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let
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render = k: v:
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if builtins.isBool v then mkBool k v
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else if builtins.isList v then mkList k v
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else mkOption k v;
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in
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builtins.concatLists (lib.mapAttrsToList render options);
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}
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