From 3291bda7b6aca51b1e2644e1adc7824c89530dc0 Mon Sep 17 00:00:00 2001
From: marius david <marius@mariusdavid.fr>
Date: Tue, 23 Aug 2022 13:09:33 +0200
Subject: [PATCH] buildRustCrate: Do not compile binaries if all the
 requiredFeatures aren't enabled.

---
 .../rust/build-rust-crate/build-crate.nix            | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/pkgs/build-support/rust/build-rust-crate/build-crate.nix b/pkgs/build-support/rust/build-rust-crate/build-crate.nix
index b24398665a10..37bf3ec26f77 100644
--- a/pkgs/build-support/rust/build-rust-crate/build-crate.nix
+++ b/pkgs/build-support/rust/build-rust-crate/build-crate.nix
@@ -69,7 +69,15 @@
 
 
 
-    ${lib.optionalString (lib.length crateBin > 0) (lib.concatMapStringsSep "\n" (bin: ''
+    ${lib.optionalString (lib.length crateBin > 0) (lib.concatMapStringsSep "\n" (bin:
+    let
+      haveRequiredFeature = if bin ? requiredFeatures then
+        # Check that all element in requiredFeatures are also present in crateFeatures
+        lib.intersectLists bin.requiredFeatures crateFeatures == bin.requiredFeatures
+      else
+        true;
+    in
+    if haveRequiredFeature then ''
       mkdir -p target/bin
       BIN_NAME='${bin.name or crateName}'
       ${if !bin ? path then ''
@@ -79,6 +87,8 @@
         BIN_PATH='${bin.path}'
       ''}
         ${build_bin} "$BIN_NAME" "$BIN_PATH"
+    '' else ''
+      echo Binary ${bin.name or crateName} not compiled due to not having all of the required features -- ${lib.escapeShellArg (builtins.toJSON bin.requiredFeatures)} -- enabled.
     '') crateBin)}
 
     ${lib.optionalString buildTests ''