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|
_:
let
lib = import <stockholm/lib>;
in
with lib;
let out = lib // rec {
guard = spec@{ type, value, ... }:
assert isOptionType type;
if type.check value
then value
else throw (toString (filter isString [
"argument"
(if spec ? name then "‘${spec.name}’" else null)
"is not a ${type.name}"
]));
types = import ./types.nix {
lib = lib // { inherit genid optionalTrace; };
};
genid = import ./genid.nix { lib = lib // out; };
genid_signed = x: ((genid x) + 16777216) / 2;
git = import ./git.nix { lib = lib // out; };
tree = import ./tree.nix { inherit lib; };
lpad = n: c: s:
if stringLength s < n
then lpad n c (c + s)
else s;
toC = x: let
type = typeOf x;
reject = throw "cannot convert ${type}";
in {
list = "{ ${concatStringsSep ", " (map toC x)} }";
null = "NULL";
set = if isDerivation x then toJSON x else reject;
string = toJSON x; # close enough
}.${type} or reject;
subdirsOf = path:
mapAttrs (name: _: path + "/${name}")
(filterAttrs (_: eq "directory") (readDir path));
genAttrs' = names: f: listToAttrs (map f names);
getAttrs = names: set:
listToAttrs (map (name: nameValuePair name set.${name})
(filter (flip hasAttr set) names));
setAttr = name: value: set: set // { ${name} = value; };
optionalTrace = c: msg: x: if c then trace msg x else x;
}; in out
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