add shell script to apply alacritty themes

apply_theme.sh

@@ -0,0 +1,169 @@
+#!/usr/bin/env bash
+
+# #<---------------------------->
+# # You must include this section when:
+# # Distributing, Using and/or Modifying this code.
+# # Please read and abide by the terms of the included LICENSE.
+# # Copyright 2020, Deepankar Chakroborty, All rights reserved.
+# #  
+# #  Version : 0.0.1
+# #  Author : Deepankar Chakroborty (https://github.com/dchakro)
+# #  Report issues: https://github.com/dchakro/alacritty_colors/issues
+# #  License: https://github.com/dchakro/alacritty_colors/blob/master/LICENSE
+# #<---------------------------->
+
+# Make a theme list
+
+declare -a arrFiles
+cd themes
+for file in *.yml
+do
+    arrFiles=("${arrFiles[@]}" "$file")
+done
+cd ..
+
+
+RESET()
+{
+# Copies ./base.yml -> ~/.alacritty.yml
+echo ""
+echo 'This will overwrite your ~/.alacritty.yml with ./base.yml'
+while true; do
+		read -p "Restore base config (y/N): " backup_choice1
+		case $backup_choice1 in
+	       	[Yy]* )  
+	       		cp ./base.yml ~/.alacritty.yml && echo "Config reset to base!"
+	       		break 
+	       		;;
+	       	[Nn]* )  
+	       		echo "Reset aborted."
+	       		break
+	       		;;
+	       	* )
+	       		echo "Please answer with either Y/y or N/n."
+	   	esac
+	done
+
+}
+
+BACKUP()
+{
+# Backs up ~/.alacritty.yml as ~/.alacritty.bak.yml
+if [ ! -f ~/.alacritty.yml ] ; then
+	echo '~/.alacritty.yml does not exist!'
+	RESET
+fi
+
+if [ ! -f ~/.alacritty.bak.yml ] ; then
+	cp ~/.alacritty.yml ~/.alacritty.bak.yml && echo "Config backup successful!"
+else
+	while true; do
+		read -p "Backup exists. Overwrite? (y/N): " backup_choice2
+	    case $backup_choice2 in
+	       	[Yy]* )  
+	       		cp ~/.alacritty.yml ~/.alacritty.bak.yml && echo "Backup overwrite successful!"
+	       		break 
+	       		;;
+	       	[Nn]* )  
+	       		echo "Backup aborted."
+	       		break
+	       		;;
+	       	* )
+	       		echo "Please answer with either Y/y or N/n."
+	   	esac
+	done
+fi
+}
+
+RESTORE()
+{
+if [ -f ~/.alacritty.bak.yml ] ; then
+   cp -f ~/.alacritty.bak.yml ~/.alacritty.yml && echo "Config restored!"   
+else
+	echo "Backup config for alacritty does not exist!!"
+	exit 1
+fi
+}
+
+
+LIST_THEMES()
+{
+echo 'Availabe themes:'
+declare -i counter
+counter=1
+for item in "${arrFiles[@]}"
+do
+    echo "# ${counter} :${item}"
+    counter=($counter+1)
+done
+}
+
+APPLY_THEMES()
+{
+LIST_THEMES
+read -p "Choose (default=1): " inp
+if [ -z "${inp}" ]; then
+	inp=1
+fi
+inp=$((inp-1)) # as array indices start from 0
+echo ""
+echo "Applying the theme: ${arrFiles[inp]}"
+
+cat ./base.yml ./themes/${arrFiles[inp]} >| ~/.alacritty.yml
+bash ./show_colors.sh
+
+while true; do
+	read -p "Keep changes (Y/n): " choice
+	case $choice in
+	   	[Yy]* )  
+	   		echo "Theme set to: ${arrFiles[inp]}"
+	   		exit 0 
+     		;;
+       	[Nn]* )  
+       		RESTORE
+       		break
+       		;;
+       	* )
+       		echo "Please answer with either Y/y or N/n."
+	   	esac
+done
+}
+
+while true
+do
+	reset_choice=""
+	choice=""
+	backup_choice1=""
+	backup_choice2=""
+	inp=""
+	
+	
+	printf ' -- Apply alacritty themes -- 
+	1) Apply Themes
+	2) Backup .alacritty.yml
+	3) Restore the backup
+	4) Reset config (no defined color scheme)
+	5) Exit
+	  
+	Enter: ';
+	read var;
+	
+	if [ "$var" -eq "1" ]; then
+		APPLY_THEMES
+	fi
+	if [ "$var" -eq "2" ]; then
+		BACKUP
+		exit 0
+	fi
+	if [ "$var" -eq "3" ]; then
+		RESTORE
+		exit 0
+	fi
+	if [ "$var" -eq "4" ]; then
+		RESET
+		exit 0
+	fi
+	if [ "$var" -eq "5" ]; then
+		exit 0
+	fi
+done