use with builtins nib.types
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6 changed files with 36 additions and 31 deletions
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@ -1,10 +1,11 @@
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{nib, ...} @ args: let
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struct = import ./struct.nix args;
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in
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nib.types.mergeAttrsList [
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# submodule is included directly to this module (ie self.myFunc)
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struct
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with nib.types;
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mergeAttrsList [
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# submodule is included directly to this module (ie self.myFunc)
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struct
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# submodule content is accessible first by submodule name
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# then by the name of the content (ie self.submodule.myFunc)
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]
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# submodule content is accessible first by submodule name
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# then by the name of the content (ie self.submodule.myFunc)
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]
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@ -1,23 +1,23 @@
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{nib, ...}:
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with builtins nib.types; rec {
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cmpStructErr' = errBadKeys: errBadValues: path: S: T:
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if builtins.isAttrs S && builtins.isAttrs T
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if isAttrs S && isAttrs T
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then let
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keysS = builtins.attrNames S;
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keysT = builtins.attrNames T;
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keysS = attrNames S;
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keysT = attrNames T;
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in
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# ensure all key names match, then recurse
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if !(keysS == keysT)
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then errBadKeys path keysS keysT
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else
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(firstErr
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(builtins.map
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(map
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(k: cmpStructErr' errBadKeys errBadValues (path ++ [k]) (keysS.${k}) (keysT.${k}))
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keysS))
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else
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# terminating leaf in recursion tree reached
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# ensure values' types match
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(builtins.typeOf S == builtins.typeOf T)
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(typeOf S == typeOf T)
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|| errBadValues path S T;
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cmpStructErr = errBadKeys: errBadValues: cmpStructErr' errBadKeys errBadValues [];
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@ -60,9 +60,9 @@ with builtins nib.types; rec {
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in
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errOr ({...}:
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Ok (
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attrs.mapAttrsRecursive (
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mapAttrsRecursive (
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path: value: let
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valueS = attrs.attrValueAt S path;
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valueS = attrValueAt S path;
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in
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if valueS != null
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then valueS
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@ -1,9 +1,10 @@
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{nib, ...}: rec {
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{nib, ...}:
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with builtins; rec {
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nameValuePair = name: value: {inherit name value;};
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identityAttrs = value: {${value} = value;};
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identityAttrsList = values: builtins.map (v: identityAttrs v) values;
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identityAttrsList = values: map (v: identityAttrs v) values;
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/**
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Generate an attribute set by mapping a function over a list of
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@ -73,13 +74,13 @@
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:::
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*/
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genAttrs' = xs: f: builtins.listToAttrs (map f xs);
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genAttrs' = xs: f: listToAttrs (map f xs);
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mapAttrsRecursiveCond = cond: f: set: let
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recurse = path:
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builtins.mapAttrs (
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mapAttrs (
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name: value:
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if builtins.isAttrs value && cond value
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if isAttrs value && cond value
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then recurse (path ++ [name]) value
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else f (path ++ [name]) value
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);
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@ -92,7 +93,7 @@
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# given path as a list of strings, return that value of an
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# attribute set at that path
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attrValueAt = nib.types.foldl (l: r:
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if l != null && builtins.hasAttr r l
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if l != null && hasAttr r l
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then l.${r}
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else null);
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@ -108,11 +109,11 @@
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binaryMerge start (start + (end - start) / 2) // binaryMerge (start + (end - start) / 2) end
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else
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# Otherwise there will be exactly 1 element due to the invariant, in which case we just return it directly
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builtins.elemAt list start;
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elemAt list start;
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in
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if list == []
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then
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# Calling binaryMerge as below would not satisfy its invariant
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{}
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else binaryMerge 0 (builtins.length list);
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else binaryMerge 0 (length list);
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}
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@ -1,4 +1,5 @@
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{...}: rec {
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{...}:
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with builtins; rec {
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# Fault Monad
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# Wrapper around an error (ie builtins.abort)
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Fault = error: {
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@ -6,7 +7,7 @@
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};
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# Pattern Matching
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isFault = F: builtins.attrNames F == ["error"];
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isFault = F: attrNames F == ["error"];
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# Unwrap (Monadic Return Operation)
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unwrapFault = F: F.error;
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@ -1,13 +1,14 @@
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{...}: rec {
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{...}:
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with builtins; rec {
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foldl = op: nul: list: let
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foldl' = n:
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if n == -1
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then nul
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else op (foldl' (n - 1)) (builtins.elemAt list n);
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else op (foldl' (n - 1)) (elemAt list n);
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in
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foldl' (builtins.length list - 1);
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foldl' (length list - 1);
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crossLists = f: foldl (fs: args: builtins.concatMap (f: map f args) fs) [f];
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crossLists = f: foldl (fs: args: concatMap (f: map f args) fs) [f];
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findFirstIndex = pred: default: list: let
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# A naive recursive implementation would be much simpler, but
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@ -23,7 +24,7 @@
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#
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# We start with index -1 and the 0'th element of the list, which satisfies the invariant
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resultIndex =
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builtins.foldl' (
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foldl' (
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index: el:
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if index < 0
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then
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@ -50,5 +51,5 @@
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in
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if index == null
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then default
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else builtins.elemAt list index;
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else elemAt list index;
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}
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@ -1,4 +1,5 @@
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{nib, ...}: rec {
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{nib, ...}:
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with builtins; rec {
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# Res (Result) Monad
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Res = success: value: {inherit success value;};
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Ok = value: Res true value;
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@ -7,7 +8,7 @@
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Err' = Err "err";
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# Pattern Matching
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isRes = R: builtins.attrNames R == ["success" "value"];
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isRes = R: attrNames R == ["success" "value"];
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isOk = R: isRes R && R.success;
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isErr = R: isRes R && !R.success;
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