nix: build improvements (#5952)

* scripts: allow using existing variable values in generateVersion.sh

* nix: populate versioning variables

* nix: remove unused meson input

* nix: remove unnecessary hyprland-protocols dependency

* Nix: remove nixConfig from flake

It's more annoying than helpful.

* CI/Nix: fix PR build failure

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

.github/workflows/nix-ci.yml

@@ -4,6 +4,7 @@ on: [push, pull_request, workflow_dispatch]
 
 jobs:
   update-inputs:
+    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
     uses: ./.github/workflows/nix-update-inputs.yml
     secrets: inherit
 

flake.nix

@@ -74,9 +74,6 @@
         # hyprland-extras
         
         xdg-desktop-portal-hyprland
-        # dependencies
-        
-        hyprland-protocols
         ;
     });
 
@@ -97,9 +94,4 @@
     nixosModules.default = import ./nix/module.nix inputs;
     homeManagerModules.default = import ./nix/hm-module.nix self;
   };
-
-  nixConfig = {
-    extra-substituters = ["https://hyprland.cachix.org"];
-    extra-trusted-public-keys = ["hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="];
-  };
 }

nix/default.nix

@@ -5,7 +5,6 @@
   pkgconf,
   makeWrapper,
   cmake,
-  meson,
   ninja,
   binutils,
   cairo,
@@ -13,7 +12,6 @@
   fribidi,
   git,
   hyprcursor,
-  hyprland-protocols,
   hyprlang,
   hyprwayland-scanner,
   jq,
@@ -72,22 +70,12 @@ assert lib.assertMsg (!hidpiXWayland) "The option `hidpiXWayland` has been remov
     postPatch = ''
       # Fix hardcoded paths to /usr installation
       sed -i "s#/usr#$out#" src/render/OpenGL.cpp
-
-      # Generate version.h
-      cp src/version.h.in src/version.h
-      substituteInPlace src/version.h \
-        --replace-warn "@HASH@" '${commit}' \
-        --replace-warn "@BRANCH@" "" \
-        --replace-warn "@MESSAGE@" "" \
-        --replace-warn "@DATE@" "${date}" \
-        --replace-warn "@TAG@" "" \
-        --replace-warn "@DIRTY@" '${
-        if commit == ""
-        then "dirty"
-        else ""
-      }'
     '';
 
+    DATE = date;
+    HASH = commit;
+    DIRTY = if commit == "" then "dirty" else "";
+
     nativeBuildInputs = lib.concatLists [
       [
         hyprwayland-scanner
@@ -118,7 +106,6 @@ assert lib.assertMsg (!hidpiXWayland) "The option `hidpiXWayland` has been remov
         fribidi
         git
         hyprcursor.dev
-        hyprland-protocols
         hyprlang
         libGL
         libdrm

scripts/generateVersion.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 cp -fr ./src/version.h.in ./src/version.h
 
-HASH=$(git rev-parse HEAD)
-BRANCH=$(git branch --show-current)
-MESSAGE=$(git show ${GIT_COMMIT_HASH} | head -n 5 | tail -n 1 | sed -e 's/#//g' -e 's/\"//g')
-DATE=$(git show ${GIT_COMMIT_HASH} --no-patch --format=%cd --date=local)
-DIRTY=$(git diff-index --quiet HEAD -- || echo dirty)
-TAG=$(git describe --tags)
-COMMITS=$(git rev-list --count HEAD)
+HASH=${HASH-$(git rev-parse HEAD)}
+BRANCH=${BRANCH-$(git branch --show-current)}
+MESSAGE=${MESSAGE-$(git show | head -n 5 | tail -n 1 | sed -e 's/#//g' -e 's/\"//g')}
+DATE=${DATE-$(git show --no-patch --format=%cd --date=local)}
+DIRTY=${DIRTY-$(git diff-index --quiet HEAD -- || echo dirty)}
+TAG=${TAG-$(git describe --tags)}
+COMMITS=${COMMITS-$(git rev-list --count HEAD)}
 
 sed -i -e "s#@HASH@#${HASH}#" ./src/version.h
 sed -i -e "s#@BRANCH@#${BRANCH}#" ./src/version.h