diff options
| -rw-r--r-- | pkgs/build-support/trivial-builders.nix | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/pkgs/build-support/trivial-builders.nix b/pkgs/build-support/trivial-builders.nix index 55df09121b4..263320ca6d9 100644 --- a/pkgs/build-support/trivial-builders.nix +++ b/pkgs/build-support/trivial-builders.nix @@ -2,11 +2,16 @@ let - runCommand' = stdenv: name: env: buildCommand: + runCommand' = runLocal: stdenv: name: env: buildCommand: stdenv.mkDerivation ({ inherit name buildCommand; passAsFile = [ "buildCommand" ]; - } // env); + } + // (lib.optionalAttrs runLocal { + preferLocalBuild = true; + allowSubstitutes = false; + }) + // env); in @@ -21,10 +26,26 @@ rec { * runCommand "name" {envVariable = true;} ''echo hello > $out'' * runCommandNoCC "name" {envVariable = true;} ''echo hello > $out'' # equivalent to prior * runCommandCC "name" {} ''gcc -o myfile myfile.c; cp myfile $out''; + * + * The `*Local` variants force a derivation to be built locally, + * it is not substituted. + * + * This is intended for very cheap commands (<1s execution time). + * It saves on the network roundrip and can speed up a build. + * + * It is the same as adding the special fields + * `preferLocalBuild = true;` + * `allowSubstitutes = false;` + * to a derivation’s attributes. */ runCommand = runCommandNoCC; - runCommandNoCC = runCommand' stdenvNoCC; - runCommandCC = runCommand' stdenv; + runCommandLocal = runCommandNoCCLocal; + + runCommandNoCC = runCommand' false stdenvNoCC; + runCommandNoCCLocal = runCommand' true stdenvNoCC; + + runCommandCC = runCommand' false stdenv; + runCommandCCLocal = runCommand' true stdenv; /* Writes a text file to the nix store. |