nixpkgs/pkgs/development/ruby-modules/bundler-env/default.nix
talyz affcf9ba1e bundlerEnv: Add option to copy gem files instead of symlinking
The way ruby loads gems and keeps track of their paths seems to not
always work very well when the gems are accessed through
symlinks. Ruby will then complain that the same files are loaded
multiple times; it relies on the file's full path to determine whether
the file is loaded or not.

This adds an option to simply copy all gem files into the environment
instead, which gets rid of this issue, but may instead result in major
file duplication.
2020-03-03 21:19:01 +01:00

76 lines
2.2 KiB
Nix

{ ruby, lib, callPackage, defaultGemConfig, buildEnv, runCommand
, bundler, rsync
}@defs:
{ name ? null
, pname ? null
, gemdir ? null
, gemfile ? null
, lockfile ? null
, gemset ? null
, groups ? ["default"]
, ruby ? defs.ruby
, copyGemFiles ? false # Copy gem files instead of symlinking
, gemConfig ? defaultGemConfig
, postBuild ? null
, document ? []
, meta ? {}
, ignoreCollisions ? false
, passthru ? {}
, ...
}@args:
let
inherit (import ../bundled-common/functions.nix {inherit lib ruby gemConfig groups; }) genStubsScript;
basicEnv = (callPackage ../bundled-common {}) (args // { inherit pname name; mainGemName = pname; });
inherit (basicEnv) envPaths;
# Idea here is a mkDerivation that gen-bin-stubs new stubs "as specified" -
# either specific executables or the bin/ for certain gem(s), but
# incorporates the basicEnv as a requirement so that its $out is in our path.
# When stubbing the bins for a gem, we should use the gem expression
# directly, which means that basicEnv should somehow make it available.
# Different use cases should use different variations on this file, rather
# than the expression trying to deduce a use case.
# The basicEnv should be put into passthru so that e.g. nix-shell can use it.
in
if pname == null then
basicEnv // { inherit name basicEnv; }
else
let
bundlerEnvArgs = {
inherit ignoreCollisions;
name = basicEnv.name;
paths = envPaths;
pathsToLink = [ "/lib" ];
postBuild = genStubsScript {
inherit lib ruby bundler groups;
confFiles = basicEnv.confFiles;
binPaths = [ basicEnv.gems.${pname} ];
} + lib.optionalString (postBuild != null) postBuild;
meta = { platforms = ruby.meta.platforms; } // meta;
passthru = basicEnv.passthru // {
inherit basicEnv;
inherit (basicEnv) env;
} // passthru;
};
in
if copyGemFiles then
runCommand basicEnv.name bundlerEnvArgs ''
mkdir -p $out
for i in $paths; do
${rsync}/bin/rsync -a $i/lib $out/
done
eval "$postBuild"
''
else
buildEnv bundlerEnvArgs