implement #2241 (custom config file during install)

docs/README.md

@@ -46,6 +46,13 @@ That's it! :smiley:
 You can check out more components of Bash-it, and customize it to your desire.  
 For more information, see detailed instructions [here](https://bash-it.readthedocs.io/en/latest/installation/).
 
+### custom configuration file location
+
+By default the instller modifies/creates the actual ``~/.bashrc`` is updated.
+If this is undesirable, you can create another file, by run the installer:
+```bash
+BASH_IT_CONFIG_FILE=path/to/my/custom/location.bash ~/.bash_it/install.sh
+```
 
 ## Contributing
 

install.sh

@@ -194,6 +194,13 @@ case $OSTYPE in
 		;;
 esac
 
+# overriding CONFIG_FILE:
+CONFIG_FILE="${BASH_IT_CONFIG_FILE:-"${CONFIG_FILE}"}"
+# create subdir if CONFIG_FILE has subdirectory components
+if [[ "${CONFIG_FILE%/*}" != "${CONFIG_FILE}" ]]; then
+	mkdir -p "${HOME}/${CONFIG_FILE%/*}"
+fi
+
 BACKUP_FILE=$CONFIG_FILE.bak
 echo "Installing bash-it"
 if [[ -z "${no_modify_config}" ]]; then

uninstall.sh

@@ -13,6 +13,9 @@ case $OSTYPE in
     ;;
 esac
 
+# overriding CONFIG_FILE:
+CONFIG_FILE="${BASH_IT_CONFIG_FILE:-"${CONFIG_FILE}"}"
+
 BACKUP_FILE=$CONFIG_FILE.bak
 
 if [ ! -e "$HOME/$BACKUP_FILE" ]; then