Restructuring files

2017-05-27 15:19:34 -07:00
parent 022be78eb2
commit 998d011e42
13 changed files with 56 additions and 41 deletions
@@ -0,0 +1,140 @@
+{ stdenv, runCommand, ruby, lib
+, defaultGemConfig, buildRubyGem, buildEnv
+, makeWrapper
+, bundler
+}@defs:
+
+{
+  name
+, pname ? name
+, gemfile
+, lockfile
+, gemset
+, gemdir
+, ruby ? defs.ruby
+, gemConfig ? defaultGemConfig
+, postBuild ? null
+, document ? []
+, meta ? {}
+, groups ? ["default"]
+, ignoreCollisions ? false
+, ...
+}@args:
+
+with  import ./functions.nix { inherit lib gemConfig; };
+
+let
+
+  importedGemset = import gemset;
+
+  filteredGemset = filterGemset { inherit ruby groups; } importedGemset;
+
+  configuredGemset = lib.flip lib.mapAttrs filteredGemset (name: attrs:
+    applyGemConfigs (attrs // { inherit ruby; gemName = name; })
+  );
+
+  hasBundler = builtins.hasAttr "bundler" filteredGemset;
+
+  bundler =
+    if hasBundler then gems.bundler
+    else defs.bundler.override (attrs: { inherit ruby; });
+
+  gems = lib.flip lib.mapAttrs configuredGemset (name: attrs: buildGem name attrs);
+
+  copyIfBundledByPath = { bundledByPath ? false, ...}@main:
+  (if bundledByPath then ''
+  cp -a ${gemdir}/* $out/
+  '' else ""
+  );
+
+  maybeCopyAll = pname: if pname == null then "" else
+  let
+    mainGem = gems."${pname}" or (throw "bundlerEnv: gem ${pname} not found");
+  in
+    copyIfBundledByPath mainGem;
+
+  # We have to normalize the Gemfile.lock, otherwise bundler tries to be
+  # helpful by doing so at run time, causing executables to immediately bail
+  # out. Yes, I'm serious.
+  confFiles = runCommand "gemfile-and-lockfile" {} ''
+    mkdir -p $out
+    ${maybeCopyAll pname}
+    cp ${gemfile} $out/Gemfile || ls -l $out/Gemfile
+    cp ${lockfile} $out/Gemfile.lock || ls -l $out/Gemfile.lock
+  '';
+
+  buildGem = name: attrs: (
+    let
+      gemAttrs = composeGemAttrs ruby gems name attrs;
+    in
+    if gemAttrs.type == "path" then
+      pathDerivation gemAttrs
+    else
+      buildRubyGem gemAttrs
+  );
+
+  envPaths = lib.attrValues gems ++ lib.optional (!hasBundler) bundler;
+
+  basicEnv = buildEnv {
+    inherit ignoreCollisions;
+
+    name = if name == null then pname else name;
+
+    #name = pname;
+
+    paths = envPaths;
+    pathsToLink = [ "/lib" ];
+
+    postBuild = genStubsScript (defs // args // {
+      inherit confFiles bundler groups;
+      binPaths = envPaths;
+    }) + lib.optionalString (postBuild != null) postBuild;
+
+    meta = { platforms = ruby.meta.platforms; } // meta;
+
+    passthru = rec {
+      inherit ruby bundler gems mainGem confFiles; # drvName;
+
+      wrappedRuby =
+      stdenv.mkDerivation {
+        name = "wrapped-ruby-${pname}";
+        nativeBuildInputs = [ makeWrapper ];
+        buildCommand = ''
+          mkdir -p $out/bin
+          for i in ${ruby}/bin/*; do
+            makeWrapper "$i" $out/bin/$(basename "$i") \
+              --set BUNDLE_GEMFILE ${confFiles}/Gemfile \
+              --set BUNDLE_PATH ${basicEnv}/${ruby.gemPath} \
+              --set BUNDLE_FROZEN 1 \
+              --set GEM_HOME ${basicEnv}/${ruby.gemPath} \
+              --set GEM_PATH ${basicEnv}/${ruby.gemPath}
+          done
+        '';
+      };
+
+      env = let
+        irbrc = builtins.toFile "irbrc" ''
+          if !(ENV["OLD_IRBRC"].nil? || ENV["OLD_IRBRC"].empty?)
+            require ENV["OLD_IRBRC"]
+          end
+          require 'rubygems'
+          require 'bundler/setup'
+        '';
+        in stdenv.mkDerivation {
+          name = "${pname}-interactive-environment";
+          nativeBuildInputs = [ wrappedRuby basicEnv ];
+          shellHook = ''
+            export OLD_IRBRC="$IRBRC"
+            export IRBRC=${irbrc}
+          '';
+          buildCommand = ''
+            echo >&2 ""
+            echo >&2 "*** Ruby 'env' attributes are intended for interactive nix-shell sessions, not for building! ***"
+            echo >&2 ""
+            exit 1
+          '';
+        };
+    };
+  };
+in
+  basicEnv