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Merge branch 'replace-dependency' of https://github.com/roconnor/nixpkgs

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When replace-dependency is given a drv that doesn't actually depend on
oldDependency, then just return back the original drv but also issue a
warning.
This commit is contained in:
Shea Levy 2015-11-17 07:09:03 -05:00
parent aa9827a948 fb683211dc
commit a75de3ce56
1 changed files with 6 additions and 4 deletions
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10
pkgs/build-support/replace-dependency.nix
View file

@ -17,11 +17,12 @@
# };
# This will rebuild glibc with your security patch, then copy over firefox
# (and all of its dependencies) without rebuilding further.
{ drv, oldDependency, newDependency }:
{ drv, oldDependency, newDependency, verbose ? true }:
with lib;
let
warn = if verbose then builtins.trace else (x:y:y);
references = import (runCommand "references.nix" { exportReferencesGraph = [ "graph" drv ]; } ''
(echo {
while read path
@ -47,7 +48,7 @@ let
oldStorepath = builtins.storePath (discard (toString oldDependency));
referencesOf = drv: getAttr (discard (toString drv)) references;
referencesOf = drv: references.${discard (toString drv)};
dependsOnOldMemo = listToAttrs (map
(drv: { name = discard (toString drv);
@ -55,7 +56,7 @@ let
any dependsOnOld (referencesOf drv);
}) (builtins.attrNames references));
dependsOnOld = drv: getAttr (discard (toString drv)) dependsOnOldMemo;
dependsOnOld = drv: dependsOnOldMemo.${discard (toString drv)};
drvName = drv:
discard (substring 33 (stringLength (builtins.baseNameOf drv)) (builtins.baseNameOf drv));
@ -77,5 +78,6 @@ let
})
(filter dependsOnOld (builtins.attrNames references))) // rewrittenDeps;
drvHash = discard (toString drv);
in assert (stringLength (drvName (toString oldDependency)) == stringLength (drvName (toString newDependency)));
getAttr (discard (toString drv)) rewriteMemo
rewriteMemo.${drvHash} or (warn "replace-dependency.nix: Derivation ${drvHash} does not depend on ${discard (toString oldDependency)}" drv)