Improvement of Gnome Extension Detection Logic

lib/fusuma/plugin/appmatcher.rb

@@ -3,7 +3,6 @@
 require "fusuma/plugin/appmatcher/version"
 
 require "fusuma/plugin/appmatcher/x11"
-require "fusuma/plugin/appmatcher/gnome"
 require "fusuma/plugin/appmatcher/gnome_extension"
 require "fusuma/plugin/appmatcher/gnome_extensions/installer"
 require "fusuma/plugin/appmatcher/unsupported_backend"
@@ -22,12 +21,19 @@ def backend_klass
         when /wayland/
           case xdg_current_desktop
           when /GNOME/
-            return GnomeExtension if GnomeExtensions::Installer.new.installed?
-
-            return Gnome
+            if GnomeExtensions::Installer.new.enabled?
+              return GnomeExtension
+            else
+              MultiLogger.warn "Appmatcher Gnome Shell Extension is NOT enabled"
+              MultiLogger.warn "Please enable it by running the following command:"
+              MultiLogger.warn ""
+              MultiLogger.warn "$ fusuma-appmatcher --install-gnome-extension"
+              MultiLogger.warn ""
+            end
           end
         end
 
+        MultiLogger.warn "appmatcher doesn't support"
         UnsupportedBackend
       end
 

lib/fusuma/plugin/appmatcher/gnome_extensions/installer.rb

@@ -11,24 +11,6 @@ module GnomeExtensions
         class Installer
           include UserSwitcher
 
-          EXTENSION = "./[email protected]"
-
-          def gnome_shell_extension_path
-            output = `gnome-shell --version`
-            version = output.match(/GNOME Shell (\d+\.\d+)/)
-
-            if version
-              version_number = version[1].to_f
-              if version_number >= 45.0
-                "./[email protected]"
-              else
-                "./[email protected]"
-              end
-            else
-              "./[email protected]"
-            end
-          end
-
           def install
             pid = as_user(proctitle: self.class.name.underscore) do |user|
               FileUtils.cp_r(source_path, install_path(user.username))
@@ -52,18 +34,41 @@ def installed?
             File.exist?(install_path)
           end
 
+          def enabled?
+            enabled_extensions = `gsettings get org.gnome.shell enabled-extensions`.strip
+            enabled_extensions.include?(EXTENSION)
+          end
+
           private
 
           def user_extension_dir(username = login_username)
             File.expand_path("#{Dir.home(username)}/.local/share/gnome-shell/extensions/")
           end
 
+          EXTENSION = "[email protected]"
+          EXTENSION45 = "[email protected]"
           def install_path(username = login_username)
             File.expand_path("#{Dir.home(username)}/.local/share/gnome-shell/extensions/#{EXTENSION}")
           end
 
           def source_path
-            File.expand_path(gnome_shell_extension_path, __dir__)
+            File.expand_path(gnome_shell_extension_filename, __dir__)
+          end
+
+          def gnome_shell_extension_filename
+            output = `gnome-shell --version`
+            version = output.match(/GNOME Shell (\d+\.\d+)/)
+
+            if version
+              version_number = version[1].to_f
+              if version_number >= 45.0
+                EXTENSION45
+              else
+                EXTENSION
+              end
+            else
+              EXTENSION
+            end
           end
 
           def login_username

lib/fusuma/plugin/appmatcher/unsupported_backend.rb

@@ -29,9 +29,6 @@ def watch_start
         end
 
         class Matcher
-          def initialize
-          end
-
           def running_applications
             warn
             nil

spec/fusuma/plugin/appmatcher/gnome_extensions/installer_spec.rb

@@ -7,19 +7,65 @@ module Plugin
     module Appmatcher
       module GnomeExtensions
         RSpec.describe Installer do
+          let(:installer) { described_class.new }
+          let(:user) { UserSwitcher::User.new("user") }
+
           describe "#install" do
-            it "should copy file to users dir"
+            before do
+              allow(Process).to receive(:waitpid)
+              allow(installer).to receive(:as_user).and_yield(user) do |block_context|
+                allow(block_context).to receive(:source_path).and_return("source_path")
+                allow(block_context).to receive(:install_path).with(user.username).and_return("install_path")
+                allow(block_context).to receive(:user_extension_dir).with(user.username)
+              end
+            end
+            it "should copy file to user's dir" do
+              expect(FileUtils).to receive(:cp_r).with(any_args)
+              installer.install
+            end
           end
+
           describe "#uninstall" do
-            context "when extension is NOT installed" do
-              it "should remove file to users dir"
+            before do
+              allow(Process).to receive(:waitpid)
+              allow(installer).to receive(:as_user).and_yield(user) do |block_context|
+                allow(block_context).to receive(:source_path).and_return("source_path")
+                allow(block_context).to receive(:install_path).with(user.username).and_return("install_path")
+                allow(block_context).to receive(:user_extension_dir).with(user.username)
+              end
+            end
+
+            context "when extension is installed" do
+              before do
+                allow(installer).to receive(:installed?).and_return(true)
+              end
+              it "should remove file to user's dir" do
+                expect(FileUtils).to receive(:rm_r).with(any_args)
+                installer.uninstall
+              end
             end
+
             context "when extension is NOT installed" do
-              it "should NOT execute"
+              before do
+                allow(installer).to receive(:installed?).and_return(false)
+              end
+              it "should NOT execute" do
+                expect(installer).not_to receive(:as_user)
+                installer.uninstall
+              end
             end
           end
-          describe "#installed?" do
-            it "check extension is in the installed path"
+
+          describe "#enabled?" do
+            it "returns true if the gnome extension is enabled" do
+              allow(installer).to receive(:`).with("gsettings get org.gnome.shell enabled-extensions").and_return("['[email protected]']")
+              expect(installer.enabled?).to be true
+            end
+
+            it "returns false if the gnome extension is not enabled" do
+              allow(installer).to receive(:`).with("gsettings get org.gnome.shell enabled-extensions").and_return("[]")
+              expect(installer.enabled?).to be false
+            end
           end
         end
       end

spec/fusuma/plugin/appmatcher_spec.rb

@@ -22,18 +22,18 @@ module Plugin
           context "when XDG_CURRENT_DESKTOP is ubuntu:GNOME" do
             before { allow(Appmatcher).to receive(:xdg_current_desktop).and_return("ubuntu:GNOME") }
 
-            context "when gnome-extension is installed" do
+            context "when gnome-extension is enabled" do
               before do
-                allow_any_instance_of(Appmatcher::GnomeExtensions::Installer).to receive(:installed?).and_return(true)
+                allow_any_instance_of(Appmatcher::GnomeExtensions::Installer).to receive(:enabled?).and_return(true)
               end
               it { is_expected.to eq Appmatcher::GnomeExtension }
             end
 
-            context "when gnome-extension is NOT installed" do
+            context "when gnome-extension is NOT enabled" do
               before do
-                allow_any_instance_of(Appmatcher::GnomeExtensions::Installer).to receive(:installed?).and_return(false)
+                allow_any_instance_of(Appmatcher::GnomeExtensions::Installer).to receive(:enabled?).and_return(false)
               end
-              it { is_expected.to eq Appmatcher::Gnome }
+              it { is_expected.to eq Appmatcher::UnsupportedBackend }
             end
           end