[build] Initial impl to check dependencies when compiling on macos

1 files changed, 55 insertions, 0 deletions

diff --git a/dependency_checker.rb b/dependency_checker.rb
new file mode 100644
index 0000000000..e36113f4fb
--- /dev/null
+++ b/dependency_checker.rb
@@ -0,0 +1,55 @@
+require 'pp'
+
+REQUIRED_XAMARIN_MAC_VERSION="2.0"
+XAMARIN_MAC_VERSION_FILE="/Library/Frameworks/Xamarin.Mac.framework/Versions/Current/Version"
+
+REQUIRED_MONO_VERSION="4.0"
+MONO_BINARY="/Library/Frameworks/Mono.Framework/Versions/Current/bin/mono"
+
+class String
+	def red;            "\e[31m#{self}\e[0m" end
+end
+
+def compare_version(first, second)
+	val1 = first.split('.').map { |x| x.to_i }
+	val2 = second.split('.').map { |x| x.to_i }
+
+	return val1 <=> val2
+end
+
+def check_product(required_version, version_file, product_name)
+	actual_version = File.read(version_file).strip
+	retval = compare_version(actual_version, required_version)
+	if (retval < 0)
+		puts "Your installed #{product_name} (#{actual_version}) is too old, please use #{required_version} or newer".red
+	end
+	return retval
+end
+
+def check_mono(required_version, mono_binary)
+	actual_version = `#{mono_binary} --version`
+	# Extract the version number from a string like this:
+	# 	`Mono JIT compiler version 4.2.0 (explicit/08b7103 Mon Aug 17 16:58:52 EDT 2015)`
+	actual_version = actual_version.split('version ')[1]
+	actual_version = actual_version.split(' ')[0]
+	retval = compare_version(actual_version, required_version)
+	if (retval < 0)
+		puts "Your installed mono (#{actual_version}) is too old, please use #{required_version} or newer".red
+	end
+	return retval
+end
+
+def check_monodevelop_dependencies()
+	mono_ret = check_mono(REQUIRED_MONO_VERSION, MONO_BINARY)
+	xammac_ret = check_product(REQUIRED_XAMARIN_MAC_VERSION, XAMARIN_MAC_VERSION_FILE, "Xamarin.Mac")
+	if (xammac_ret < 0 || mono_ret < 0)
+		raise RuntimeError
+	end
+end
+
+def run()
+	check_monodevelop_dependencies()
+end
+
+$stdout.sync = true
+run() if __FILE__==$0