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lib: cleanup a little bit, add traceIf

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This commit is contained in:
Jan Malakhovski 2015-03-19 15:48:54 +00:00
parent 9a75c1d7c8
commit 5990cce95f
2 changed files with 15 additions and 12 deletions
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17
lib/customisation.nix
View file

@ -29,8 +29,8 @@ rec {
For another application, see build-support/vm, where this
function is used to build arbitrary derivations inside a QEMU
virtual machine. */
virtual machine.
*/
overrideDerivation = drv: f:
let
newDrv = derivation (drv.drvAttrs // (f drv));
@ -56,18 +56,17 @@ rec {
makeOverridable = f: origArgs:
let
ff = f origArgs;
overrideWith = newArgs: origArgs // (if builtins.isFunction newArgs then newArgs origArgs else newArgs);
in
if builtins.isAttrs ff then (ff //
{ override = newArgs:
makeOverridable f (origArgs // (if builtins.isFunction newArgs then newArgs origArgs else newArgs));
{ override = newArgs: makeOverridable f (overrideWith newArgs);
deepOverride = newArgs:
makeOverridable f (lib.overrideExisting (lib.mapAttrs (deepOverrider newArgs) origArgs) newArgs);
overrideDerivation = fdrv:
makeOverridable (args: overrideDerivation (f args) fdrv) origArgs;
})
else if builtins.isFunction ff then
{ override = newArgs:
makeOverridable f (origArgs // (if builtins.isFunction newArgs then newArgs origArgs else newArgs));
{ override = newArgs: makeOverridable f (overrideWith newArgs);
__functor = self: ff;
deepOverride = throw "deepOverride not yet supported for functors";
overrideDerivation = throw "overrideDerivation not yet supported for functors";
@ -102,8 +101,10 @@ rec {
};
*/
callPackageWith = autoArgs: fn: args:
let f = if builtins.isFunction fn then fn else import fn; in
makeOverridable f ((builtins.intersectAttrs (builtins.functionArgs f) autoArgs) // args);
let
f = if builtins.isFunction fn then fn else import fn;
auto = builtins.intersectAttrs (builtins.functionArgs f) autoArgs;
in makeOverridable f (auto // args);
/* Add attributes to each output of a derivation without changing the derivation itself */

10
lib/debug.nix
View file

@ -13,10 +13,11 @@ rec {
addErrorContextToAttrs = lib.mapAttrs (a: v: lib.addErrorContext "while evaluating ${a}" v);
traceIf = p: msg: x: if p then trace msg x else x;
traceVal = x: builtins.trace x x;
traceXMLVal = x: builtins.trace (builtins.toXML x) x;
traceXMLValMarked = str: x: builtins.trace (str + builtins.toXML x) x;
traceVal = x: trace x x;
traceXMLVal = x: trace (builtins.toXML x) x;
traceXMLValMarked = str: x: trace (str + builtins.toXML x) x;
# this can help debug your code as well - designed to not produce thousands of lines
traceShowVal = x : trace (showVal x) x;
@ -42,6 +43,7 @@ rec {
traceCall2 = n : f : a : b : let t = n2 : x : traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b));
traceCall3 = n : f : a : b : c : let t = n2 : x : traceShowValMarked "${n} ${n2}:" x; in t "result" (f (t "arg 1" a) (t "arg 2" b) (t "arg 3" c));
# FIXME: rename this?
traceValIfNot = c: x:
if c x then true else trace (showVal x) false;
@ -106,6 +108,6 @@ rec {
)
else
let r = strict expr;
in builtins.trace "${str}\n result:\n${builtins.toXML r}" r
in trace "${str}\n result:\n${builtins.toXML r}" r
);
}