From 836658e7210e6277b8091e86ca65c6a756e6881e Mon Sep 17 00:00:00 2001
From: Adam Stephens <adam@valkor.net>
Date: Fri, 6 Sep 2024 09:57:17 -0400
Subject: [PATCH] beam-packages: add nodocs target for building ex_doc on 27+

---
 .../interpreters/erlang/generic-builder.nix        | 14 +++++++-------
 pkgs/top-level/all-packages.nix                    |  6 ++++++
 pkgs/top-level/beam-packages.nix                   |  7 ++++---
 3 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/pkgs/development/interpreters/erlang/generic-builder.nix b/pkgs/development/interpreters/erlang/generic-builder.nix
index ff8aadf90980..b5502a036247 100644
--- a/pkgs/development/interpreters/erlang/generic-builder.nix
+++ b/pkgs/development/interpreters/erlang/generic-builder.nix
@@ -19,11 +19,11 @@
 , libGLU ? null
 , wxGTK ? null
 , xorg ? null
-, exdoc ? null
+, ex_doc ? null
 , parallelBuild ? false
 , systemd
 , wxSupport ? true
-, exdocSupport ? false
+, ex_docSupport ? false
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd # systemd support in epmd
   # updateScript deps
 , writeScript
@@ -64,7 +64,7 @@
 , installPhase ? ""
 , preInstall ? ""
 , postInstall ? ""
-, installTargets ? [ "install" "install-docs" ]
+, installTargets ? if ((lib.versionOlder version "27.0") || ex_docSupport) then [ "install" "install-docs" ] else [ "install" ]
 , checkPhase ? ""
 , preCheck ? ""
 , postCheck ? ""
@@ -80,7 +80,7 @@ else libGL != null && libGLU != null && wxGTK != null && xorg != null);
 
 assert odbcSupport -> unixODBC != null;
 assert javacSupport -> openjdk11 != null;
-assert exdocSupport -> exdoc != null;
+assert ex_docSupport -> ex_doc != null;
 
 let
   inherit (lib) optional optionals optionalAttrs optionalString;
@@ -122,15 +122,15 @@ stdenv.mkDerivation ({
   '';
 
   # For OTP 27+ we need ex_doc to build the documentation
-  # When exdocSupport is enabled, grab the raw ex_doc executable from the exdoc
+  # When ex_docSupport is enabled, grab the raw ex_doc executable from the ex_doc
   # derivation. Next, patch the first line to use the escript that will be
   # built during the build phase of this derivation. Finally, building the
   # documentation requires the erlang-logo.png asset.
   preConfigure = ''
     ./otp_build autoconf
-  '' + optionalString exdocSupport ''
+  '' + optionalString ex_docSupport ''
     mkdir -p $out/bin
-    cp ${exdoc}/bin/.ex_doc-wrapped $out/bin/ex_doc
+    cp ${ex_doc}/bin/.ex_doc-wrapped $out/bin/ex_doc
     sed -i "1 s:^.*$:#!$out/bin/escript:" $out/bin/ex_doc
     export EX_DOC=$out/bin/ex_doc
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e69ca4d78f5b..b70715f5f36e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16529,6 +16529,12 @@ with pkgs;
     wxSupport = false;
     systemdSupport = false;
   };
+  beam_nodocs = callPackage ./beam-packages.nix {
+    beam = beam_nodocs;
+    wxSupport = false;
+    systemdSupport = false;
+    ex_docSupport = false;
+  };
 
   inherit (beam.interpreters)
     erlang erlang_27 erlang_26 erlang_25 erlang_24
diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 45900c8b06e2..6da5b2218d5e 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -1,9 +1,11 @@
 { lib
 , beam
+, beam_nodocs
 , callPackage
 , wxGTK32
 , buildPackages
 , stdenv
+, ex_docSupport ? true
 , wxSupport ? true
 , systemd
 , systemdSupport ? lib.meta.availableOn stdenv.hostPlatform systemd
@@ -30,9 +32,8 @@ in
       wxGTK = wxGTK32;
       parallelBuild = true;
       autoconf = buildPackages.autoconf269;
-      exdocSupport = true;
-      exdoc = self.packages.erlang_26.ex_doc;
-      inherit wxSupport systemdSupport;
+      inherit (beam_nodocs.packages.erlang_27) ex_doc;
+      inherit ex_docSupport wxSupport systemdSupport;
     };
 
     erlang_26 = self.beamLib.callErlang ../development/interpreters/erlang/26.nix {