Install ruby-3.2 global with the nixpkgs privided pkg (#233)

* Install ruby-3.2 global with the nixpkgs privided pkg

* Improve comment

* Make sure ruby exists in CI

* Update step name

.github/workflows/ci-home.yml

@@ -61,16 +61,20 @@ jobs:
           ${{ matrix.cleanup-script }}
       - uses: actions/checkout@v3
       - run: home-manager switch -f ./home-manager/user-github-actions.nix
-      - name: Print shell paths
+      - name: Print paths
         run: |
           which fish
           which zsh
           which bash # Be non nix shell
+          which ruby
+          which irb
       # Do not use interactive mode here.
       # Solutions as https://github.com/actions/runner/issues/241#issuecomment-924327172 will not fit with several problems
       - name: Run customized dependencies
         run: |
           fish --command 'starship --version'
           zsh -c 'which dprint'
+          zsh -c 'ruby --version'
+          zsh -c 'irb --version'
       - name: Run homemade commands
         run: zsh -c 'la'

home-manager/home.nix

@@ -88,6 +88,11 @@
     enable = true;
 
     # Replacement of `programs.direnv.enableNixDirenvIntegration = true;`
+    #
+    # Make much faster, but I may add nix_direnv_watch_file in several repositories when it has `.ruby-version`
+    # See following reference
+    #   - https://github.com/nix-community/nix-direnv/blob/ed2cb75553b4864e3c931a48e3a2cd43b93152c5/README.md?plain=1#L368-L373
+    #   - https://github.com/kachick/ruby-ulid/pull/410
     nix-direnv = {
       enable = true;
     };
@@ -165,6 +170,4 @@
   xdg.dataFile."homemade/bin/la".source = ../home/.local/share/homemade/bin/la.bash;
   xdg.dataFile."homemade/bin/zj".source = ../home/.local/share/homemade/bin/zj.bash;
   xdg.dataFile."homemade/bin/add_nix_channels".source = ../home/.local/share/homemade/bin/add_nix_channels.bash;
-  xdg.dataFile."homemade/bin/ruby".source = ../home/.local/share/homemade/bin/ruby.bash;
-  xdg.dataFile."homemade/bin/irb".source = ../home/.local/share/homemade/bin/irb.bash;
 }

home-manager/packages.nix

@@ -68,15 +68,14 @@
     # pkgs.gnumake
     # pkgs.cargo-make
 
-    # This section is just a note for my strggle
-    # Often failed to build ruby even if I enabled following dependencies
+
+    # https://github.com/NixOS/nixpkgs/pull/218114
+    pkgs.ruby_3_2
+    # If you need to build cruby from source, this section may remind the struggle
+    # Often failed to build cruby even if I enabled following dependencies
     # pkgs.zlib
     # pkgs.libyaml
     # pkgs.openssl
-    #
-    # Don't include nixpkgs ruby for complex gems and other handlings
-    # Prefer adhoc use of https://github.com/bobvanderlinden/nixpkgs-ruby as follows
-    # `nix shell github:bobvanderlinden/nixpkgs-ruby#'"ruby-3.2"' --command irb`
 
     # As a boardgamer
     # pkgs.tesseract