From de10a924f2586461d0323cc74b179aa0e8b1d1c4 Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Mon, 23 Jan 2023 01:50:49 +0300 Subject: feat(tvix/cli): implement `builtins.derivation` This uses the actual upstream Nix code for `builtins.derivation` (which is not a primop in C++ Nix) to implement `builtins.derivation` as a wrapper around `builtins.derivationStrict`. We're doing it this way to ensure that our thunking logic is correct. An initial Rust-native rewrite (see e.g. cl/7363) is pretty difficult to debug while there are still other issues to root out, but eventually we might want to turn this into native code. Change-Id: I5845e18073e103b8670e40648bd7fd9b511058e0 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7902 Tested-by: BuildkiteCI Reviewed-by: flokli --- tvix/cli/src/derivation.nix | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 tvix/cli/src/derivation.nix (limited to 'tvix/cli/src/derivation.nix') diff --git a/tvix/cli/src/derivation.nix b/tvix/cli/src/derivation.nix new file mode 100644 index 000000000000..9355cc3a96f0 --- /dev/null +++ b/tvix/cli/src/derivation.nix @@ -0,0 +1,36 @@ +# LGPL-2.1-or-later +# +# taken from: https://github.com/NixOS/nix/blob/master/src/libexpr/primops/derivation.nix +# +# TODO: rewrite in native Rust code + +/* This is the implementation of the ‘derivation’ builtin function. + It's actually a wrapper around the ‘derivationStrict’ primop. */ + +drvAttrs @ { outputs ? [ "out" ], ... }: + +let + + strict = derivationStrict drvAttrs; + + commonAttrs = drvAttrs // (builtins.listToAttrs outputsList) // + { + all = map (x: x.value) outputsList; + inherit drvAttrs; + }; + + outputToAttrListElement = outputName: + { + name = outputName; + value = commonAttrs // { + outPath = builtins.getAttr outputName strict; + drvPath = strict.drvPath; + type = "derivation"; + inherit outputName; + }; + }; + + outputsList = map outputToAttrListElement outputs; + +in +(builtins.head outputsList).value -- cgit 1.4.1