diff options
author | Alyssa Ross <hi@alyssa.is> | 2018-12-11 21:18:22 +0000 |
---|---|---|
committer | Alyssa Ross <hi@alyssa.is> | 2018-12-11 21:26:07 +0000 |
commit | 67b1265fb3d38ead5a57fee838405a2d997777c2 (patch) | |
tree | 0c127dd8432ca416db5c56f3460ec12e8cfaf746 /lib/fixed-points.nix | |
parent | ac19d5e34f384c66b71aecb921433acc5447bc51 (diff) | |
download | nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar.gz nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar.bz2 nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar.lz nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar.xz nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.tar.zst nixpkgs-67b1265fb3d38ead5a57fee838405a2d997777c2.zip |
bundlerEnv: ensure dependencies always included
Suppose I have a Gemfile like this: source "https://rubygems.org" gem "actioncable" gem "websocket-driver", group: :test The gemset.nix generated by Bundix 2.4.1 will set ActionCable's groups to [ "default" ], and websocket-driver's to [ "test" ]. This means that the generated bundlerEnv wouldn't include websocket-driver unless the test group was included, even though it's required by the default group. This is arguably a bug in Bundix (websocket-driver's groups should probably be [ "default" "test" ] or just [ "default" ]), but there's no reason bundlerEnv should omit dependencies even given such an input -- it won't necessarily come from Bundix, and it would be good for bundlerEnv to do the right thing. To fix this, filterGemset is now a recursive function, that adds dependencies of gems in the group to the filtered gemset until it stabilises on the gems that match the required groups, and all of their recursive dependencies.
Diffstat (limited to 'lib/fixed-points.nix')
-rw-r--r-- | lib/fixed-points.nix | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/fixed-points.nix b/lib/fixed-points.nix index 7169c46fcbb..2f818c88de5 100644 --- a/lib/fixed-points.nix +++ b/lib/fixed-points.nix @@ -24,6 +24,16 @@ rec { # for a concrete example. fix' = f: let x = f x // { __unfix__ = f; }; in x; + # Return the fixpoint that `f` converges to when called recursively, starting + # with the input `x`. + # + # nix-repl> converge (x: x / 2) 16 + # 0 + converge = f: x: + if (f x) == x + then x + else converge f (f x); + # Modify the contents of an explicitly recursive attribute set in a way that # honors `self`-references. This is accomplished with a function # |