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author | Gabriel Gonzalez <Gabriel439@gmail.com> | 2020-01-05 13:03:00 -0800 |
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committer | Gabriel Gonzalez <Gabriel439@gmail.com> | 2020-01-05 13:03:00 -0800 |
commit | 6d584c26143f68bf6963bc7fc5661e05d90f7ab7 (patch) | |
tree | 6ff4a5753cdca585f806b22aded37509821ac103 /lib/cli.nix | |
parent | 5edd4dd44c5f3de1886744aeac49bd396c24f966 (diff) |
Factor out a `toGNUCommandLine` utility
... as suggested by @roberth
Diffstat (limited to 'lib/cli.nix')
-rw-r--r-- | lib/cli.nix | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/lib/cli.nix b/lib/cli.nix index b6703b2ca8258..f47625d2f5370 100644 --- a/lib/cli.nix +++ b/lib/cli.nix @@ -1,6 +1,7 @@ { lib }: -{ /* Automatically convert an attribute set to command-line options. +rec { + /* Automatically convert an attribute set to command-line options. This helps protect against malformed command lines and also to reduce boilerplate related to command-line construction for simple use cases. @@ -22,21 +23,24 @@ verbose = true; }; - => " -X 'PUT' --data '{\"id\":0}' --retry '3' --url 'https://example.com/foo' --url 'https://example.com/bar' --verbose" + => "'-X' 'PUT' '--data' '{\"id\":0}' '--retry' '3' '--url' 'https://example.com/foo' '--url' 'https://example.com/bar' '--verbose'" */ encodeGNUCommandLine = + options: attrs: lib.escapeShellArgs (toGNUCommandLine options attrs); + + toGNUCommandLine = { renderKey ? key: if builtins.stringLength key == 1 then "-${key}" else "--${key}" , renderOption ? key: value: if value == null - then "" - else " ${renderKey key} ${lib.escapeShellArg value}" + then [] + else [ (renderKey key) (builtins.toString value) ] - , renderBool ? key: value: if value then " ${renderKey key}" else "" + , renderBool ? key: value: lib.optional value (renderKey key) - , renderList ? key: value: lib.concatMapStrings (renderOption key) value + , renderList ? key: value: lib.concatMap (renderOption key) value }: options: let @@ -48,5 +52,5 @@ else renderOption key value; in - lib.concatStrings (lib.mapAttrsToList render options); + builtins.concatLists (lib.mapAttrsToList render options); } |