beamPackages.mixRelease: support escript properly (#404412)

pkgs/by-name/pr/protoc-gen-elixir/package.nix

@@ -25,20 +25,7 @@ mixRelease rec {
     hash = "sha256-T1uL3xXXmCkobJJhS3p6xMrJUyiim3AMwaG87/Ix7A8=";
   };
 
-  buildInputs = [ erlang ];
-
-  postBuild = ''
-    mix do escript.build
-  '';
-
-  installPhase = ''
-    runHook preInstall
-
-    mkdir -p $out/bin
-    cp protoc-gen-elixir $out/bin
-
-    runHook postInstall
-  '';
+  escriptBinName = "protoc-gen-elixir";
 
   passthru.updateScript = nix-update-script { };
 

pkgs/development/beam-modules/ex_doc/default.nix

@@ -30,6 +30,8 @@ mixRelease {
     elixir
     ;
 
+  escriptBinName = "ex_doc";
+
   stripDebug = true;
 
   mixFodDeps = fetchMixDeps {
@@ -38,25 +40,6 @@ mixRelease {
     hash = "sha256-s4b6wuBJPdN0FPn76zbLCHzqJNEZ6E4nOyB1whUM2VY=";
   };
 
-  configurePhase = ''
-    runHook preConfigure
-    mix deps.compile --no-deps-check
-    runHook postConfigure
-  '';
-
-  buildPhase = ''
-    runHook preBuild
-    mix do escript.build
-    runHook postBuild
-  '';
-
-  installPhase = ''
-    runHook preInstall
-    mkdir -p $out/bin
-    cp -v ex_doc $out/bin
-    runHook postInstall
-  '';
-
   passthru = {
     tests = {
       # ex_doc is the doc generation for OTP 27+, so let's make sure they build

pkgs/development/beam-modules/mix-release.nix

@@ -31,6 +31,9 @@
   # Build a particular named release.
   # see https://hexdocs.pm/mix/1.12/Mix.Tasks.Release.html#content
   mixReleaseName ? "",
+  # If set, the given escript binary will be copied to the output
+  # instead of the release
+  escriptBinName ? null,
 
   # Options to be passed to the Erlang compiler. As documented in the reference
   # manual, these must be valid Erlang terms. They will be turned into an
@@ -90,6 +93,7 @@ let
 in
 assert mixNixDeps != { } -> mixFodDeps == null;
 assert stripDebug -> !enableDebugInfo;
+assert escriptBinName != null -> mixReleaseName == "";
 
 stdenv.mkDerivation (
   overridable
@@ -116,7 +120,7 @@ stdenv.mkDerivation (
           makeWrapper
         ];
 
-    buildInputs = buildInputs;
+    buildInputs = buildInputs ++ lib.optionals (escriptBinName != null) [ erlang ];
 
     MIX_ENV = mixEnv;
     MIX_DEBUG = if enableDebugInfo then 1 else 0;
@@ -199,6 +203,10 @@ stdenv.mkDerivation (
 
         mix compile --no-deps-check ${lib.concatStringsSep " " compileFlags}
 
+        ${lib.optionalString (escriptBinName != null) ''
+          mix escript.build --no-deps-check
+        ''}
+
         runHook postBuild
       '';
 
@@ -206,7 +214,17 @@ stdenv.mkDerivation (
       attrs.installPhase or ''
         runHook preInstall
 
-        mix release ${mixReleaseName} --no-deps-check --path "$out"
+        ${
+          if (escriptBinName != null) then
+            ''
+              mkdir -p $out/bin
+              cp ${escriptBinName} $out/bin
+            ''
+          else
+            ''
+              mix release ${mixReleaseName} --no-deps-check --path "$out"
+            ''
+        }
 
         runHook postInstall
       '';