[FEATURE] do not execute sudo commands if not needed

core/installers/ruby.sh

 #!/bin/bash
 
-if [ ! -z `which ruby` > /dev/null ]
+if [ -z `which scss-lint` > /dev/null ]
 then
-	echo -e "\033[0;34mInstall scss-lint\033[0m";
-	if [ $OSTYPE == "msys" ]
+	if [ ! -z `which ruby` > /dev/null ]
 	then
-		gem install scss_lint
+		echo -e "\033[0;34mInstall scss-lint\033[0m";
+		if [ $OSTYPE == "msys" ]
+		then
+			gem install scss_lint
+		else
+			sudo gem install scss_lint
+		fi
 	else
-		sudo gem install scss_lint
+		echo -e "\n\033[0;31mYou need to have ruby installed on your machine in order for scss-lint to work!\033[0m\n";
 	fi
 else
-	echo -e "\n\033[0;31mYou need to have ruby installed on your machine in order for scss-lint to work!\033[0m\n";
+	echo -e "\033[0;32mscss-lint already installed ✓\033[0m\n"
 fi
 
+

install.sh

@@ -78,30 +78,35 @@ if [ "$1" == "--local" ]; then
 	echo -e "\033[0;34mInstall sgc\033[0m";
 	cp ./core/sgc ../sgc
 else
-	# install cli globally
-	echo -e "\033[0;34mInstall sgc\033[0m";
-
-	if [ $OSTYPE == "msys" ]
+	if [ -z `which sgc` > /dev/null ]
 	then
-		cp ./core/sgc /c/Windows/System32
-	else
-		echo -e "\033[0;34mYou need to grant permission in order to install the sgc command\033[0m";
-		if [ ! -e /usr/local/bin ]
-		then
-			sudo mkdir -p /usr/local/bin
-		fi
-		sudo cp ./core/sgc /usr/local/bin
-		if [ -e /etc/bash_completion.d ]
-		then
-			# linux autocompletion path
-			sudo cp ./core/autocompletion.sh /etc/bash_completion.d/sgc
-			autocompletePath="/etc/bash_completion.d/sgc"
-		elif [ -e /usr/local/etc/bash_completion.d ]
+		# install cli globally
+		echo -e "\033[0;34mInstall sgc\033[0m";
+
+		if [ $OSTYPE == "msys" ]
 		then
-			# osx autocompletion path; if bash completion is installed
-			sudo cp ./core/autocompletion.sh /usr/local/etc/bash_completion.d/sgc
-			autocompletePath="/usr/local/etc/bash_completion.d/sgc"
+			cp ./core/sgc /c/Windows/System32
+		else
+			echo -e "\033[0;34mYou need to grant permission in order to install the sgc command\033[0m";
+			if [ ! -e /usr/local/bin ]
+			then
+				sudo mkdir -p /usr/local/bin
+			fi
+			sudo cp ./core/sgc /usr/local/bin
+			if [ -e /etc/bash_completion.d ]
+			then
+				# linux autocompletion path
+				sudo cp ./core/autocompletion.sh /etc/bash_completion.d/sgc
+				autocompletePath="/etc/bash_completion.d/sgc"
+			elif [ -e /usr/local/etc/bash_completion.d ]
+			then
+				# osx autocompletion path; if bash completion is installed
+				sudo cp ./core/autocompletion.sh /usr/local/etc/bash_completion.d/sgc
+				autocompletePath="/usr/local/etc/bash_completion.d/sgc"
+			fi
 		fi
+	else
+		echo -e "\033[0;32msgc is already installed globally ✓\033[0m\n"
 	fi
 fi