improve rakefile targets

Rakefile

@@ -1,43 +1,60 @@
-# automatic class generations
+# Automate serpapi C++ library
 # 
 
-task :default => [:init, :build, :run]
+task :default => [:clean, :setup, :build, :run]
 
 task :clean do
 	sh('rm -rf build/')
 end
 
-# initialize meson build
+desc('initialize meson build')
 task :setup do
 	sh('meson setup --wipe build')
 end
 
-# build application
+desc('build library')
 task :build => FileList['src/*.hpp', 'src/*.cpp'] do
-	sh('meson compile -C build -v')
+	sh('meson compile -C build')
 	sh('cd build && ninja')
 end
 
+desc('run test suite')
 task :test do
 	sh('ninja -C build test')
 end
 
-# run application
-task :run do
-	sh('./build/example/google_example')
-	sh('./build/oobt/oobt')
+task readme: ['README.md.erb'] do
+  `erb -T '-' README.md.erb > README.md`
 end
 
-# tested on AARCH64 and x86
-task :install_linux do
-	sh('sudo apt update -y && sudo apt install -f -y build-essential meson pkg-config curl cmake meson ninja-build libcurl4-openssl-dev rapidjson-dev googletest-dev')
+desc('generate documentation')
+task doc: [:readme]
+
+desc('run examples under build/example')
+task :example do
+	Dir.glob('build/example/*').each do |file|
+		sh(file)
+	end
 end
 
-# tested on Apple M1 aarch64
-task :install_apple do
-	sh('brew install meson pkg-config curl cmake meson ninja rapidjson googletest')
+desc('run oobt under build/oobt')
+task :oobt do
+	sh('./build/oobt/oobt')
 end
 
-task readme: ['README.md.erb'] do
-  `erb -T '-' README.md.erb > README.md`
-end
+desc('release current library')
+task :release do
+	puts("TODO implement release")
+end
+
+namespace :install do
+	desc('install dependency on debian AARCH64 and x86 [tested]')
+	task :linux do
+		sh('sudo apt update -y && sudo apt install -f -y build-essential meson pkg-config curl cmake meson ninja-build libcurl4-openssl-dev rapidjson-dev googletest')
+	end
+
+	desc('install dependency on Apple M1 aarch64 [tested]')
+	task :apple do
+		sh('brew install meson pkg-config curl cmake meson ninja rapidjson googletest')
+	end
+end