CI: nix-build-uncached (#9)

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
 
       - name: "Get pinned nixpkgs ❄️"
         id: pinned_nixpkgs
-        run: echo "::set-output name=url::$(cat PINNED_NIXPKGS)"
+        run: echo "::set-output name=url::$(cat ./pinned/nixpkgs)"
 
       - name: "Install Nix ❄️"
         uses: cachix/install-nix-action@v13
@@ -38,5 +38,5 @@ jobs:
       - name: "Set priority flag for Cachix 🚩"
         run: nix-env --set-flag priority 0 cachix
 
-      - name: "Build Home Manager 🏠 config"
-        run: ./install.sh home
+      - name: "Build Home Manager config 🏠"
+        run: ./build.sh ci

.gitignore

@@ -1 +1,2 @@
 nixos/home/result
+result

README.md

@@ -59,9 +59,9 @@ Here is an overview of the folders' structure:
     └── wm
 ```
 
+- `build.sh`: the build and installation script.
 - `home`: all the user programs, services and dotfiles.
 - `imgs`: screenshots and other images.
-- `install.sh`: the install script.
 - `notes`: cheat-sheets, docs, etc.
 - `system`: the NixOS configuration, settings for different laptops and window managers.
 
@@ -74,5 +74,5 @@ mkdir DELETE_ME && cd DELETE_ME
 nix-shell --run \
   "wget -c https://github.com/gvolpe/nix-config/archive/master.tar.gz && tar --strip-components=1 -xvf master.tar.gz" \
   -p wget s-tar
-chmod +x install.sh && ./install.sh
+chmod +x build.sh && ./build.sh
 ```

build.sh

@@ -3,7 +3,7 @@
 # Shows the output of every command
 set +x
 
-build_home() {
+prepare_home() {
   echo "Creating config / cache directories..."
 
   # Polybar logs
@@ -22,20 +22,29 @@ build_home() {
   # Desktop pic
   mkdir -p $HOME/Pictures/
   cp home/nixos.png $HOME/Pictures/
+}
 
-  # Install Home Manager
+install_hm() {
   echo "Installing Home Manager..."
-  nix-channel --add https://github.com/nix-community/home-manager/archive/master.tar.gz home-manager
+  nix-channel --add $(cat ./pinned/home-manager) home-manager
   nix-channel --update
   export NIX_PATH=$HOME/.nix-defexpr/channels${NIX_PATH:+:}$NIX_PATH
   nix-shell '<home-manager>' -A install
-
-  # Run Home Manager
-  echo "Running Home Manager build..."
-  home-manager build
 }
 
-build_home_extra() {
+build_ci() {
+  prepare_home
+  nix-shell -p nix-build-uncached --run nix-build-uncached
+}
+
+build_home() {
+  prepare_home
+  install_hm
+
+  # Switch to HM's latest build
+  echo "Running Home Manager switch..."
+  home-manager switch
+
   # Set user's profile picture for Gnome3
   sudo cp home/gvolpe.png /var/lib/AccountsService/icons/gvolpe
   sudo echo "Icon=/var/lib/AccountsService/icons/gvolpe" >> /var/lib/AccountsService/users/gvolpe
@@ -50,7 +59,7 @@ build_system() {
   sudo cp -r system/fonts/ /etc/nixos/
   sudo cp -r system/machine/ /etc/nixos/
   sudo cp -r system/wm/ /etc/nixos/
-  sudo nixos-rebuild -I nixpkgs=$(cat PINNED_NIXPKGS) switch --upgrade
+  sudo nixos-rebuild -I nixpkgs=$(cat ./pinned/nixpkgs) switch --upgrade
 }
 
 build_all() {
@@ -58,15 +67,13 @@ build_all() {
   build_system
   nix-shell -p cachix --run "cachix use gvolpe-nixos"
   build_home
-  home-manager switch
-  build_home_extra
 }
 
 case $1 in
+  "ci")
+    build_ci;;
   "home")
     build_home;;
-  "home-extra")
-    build_home_extra;;
   "system")
     build_system;;
   *)

default.nix

@@ -0,0 +1,18 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  hm_url = pkgs.lib.strings.removeSuffix "\n" (builtins.readFile ./pinned/home-manager);
+
+  home-manager = builtins.fetchTarball {
+    name   = "home-manager-2021-08-21";
+    url    = hm_url;
+    sha256 = "0s8nlgrf16bz2bhnk0xrzvivagq55cifxf2p545c7n4zj9ryfkkp";
+  };
+
+  evalHome = import "${toString home-manager}/modules";
+in
+  evalHome {
+    configuration = ./home/home.nix;
+    lib = pkgs.lib;
+    pkgs = pkgs;
+  }

pinned/home-manager

@@ -0,0 +1 @@
+https://github.com/nix-community/home-manager/archive/f6d1cad.tar.gz