rbenv: init at 1.1.2

Add new derivation for rbenv -- a ruby environment manager.

Apply suggestions from code review

Co-authored-by: Sandro <sandro.jaeckel@gmail.com>

pkgs/development/ruby-modules/rbenv/default.nix

@@ -0,0 +1,41 @@
+{ stdenv, fetchFromGitHub, bash, installShellFiles }:
+
+stdenv.mkDerivation rec {
+  pname = "rbenv";
+  version = "1.1.2";
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  src = fetchFromGitHub {
+    owner = "rbenv";
+    repo = "rbenv";
+    rev = "v${version}";
+    sha256 = "12i050vs35iiblxga43zrj7xwbaisv3mq55y9ikagkr8pj1vmq53";
+  };
+
+  postPatch = ''
+     patchShebangs src/configure
+     pushd src
+  '';
+
+  installPhase = ''
+    popd
+    mkdir -p $out/bin
+    mv libexec $out
+    ln -s $out/libexec/rbenv $out/bin/rbenv
+
+    installShellCompletion completions/rbenv.{bash,zsh}
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Groom your app’s Ruby environment";
+    longDescription = ''
+      Use rbenv to pick a Ruby version for your application and guarantee that your development environment matches production.
+      Put rbenv to work with Bundler for painless Ruby upgrades and bulletproof deployments.
+    '';
+    homepage = "https://github.com/rbenv/rbenv";
+    license = licenses.mit;
+    maintainers = with maintainers; [ fzakaria ];
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -10646,6 +10646,8 @@ in
 
   solargraph = callPackage ../development/ruby-modules/solargraph { };
 
+  rbenv = callPackage ../development/ruby-modules/rbenv { };
+
   inherit (callPackage ../development/interpreters/ruby {
     inherit (darwin) libiconv libobjc libunwind;
     inherit (darwin.apple_sdk.frameworks) Foundation;