Updated script with better messaging and to check composer version since the script won't run on composer 1.

starter_theme.sh

@@ -1,7 +1,39 @@
-echo Would you like to install a theme using the FE Setup script? \(y/n\) Be sure not to overwrite an existing theme.
+#!/bin/bash
-read install_theme
+
-if [ $install_theme == 'y' -o $install_theme == 'Y' ]
+# Setup colours for us in our output messages.
+BLACK_TXT=`tput setaf 0`
+RED_TXT=`tput setaf 1`
+GREEN_TXT=`tput setaf 2`
+YELLOW_TXT=`tput setaf 3`
+BLACK_BG=`tput setab 0`
+RED_BG=`tput setab 1`
+GREEN_BG=`tput setab 2`
+YELLOW_BG=`tput setab 3`
+RESET=`tput sgr0`
+
+# Get composer version because in order to run properly this script requires
+# Composer 2. See: https://github.com/composer/composer/issues/3299.
+# Cuts will return overall composer version (ie. 1 or 2).
+COMPOSER_VERSION_COMMAND="composer --version --no-ansi | cut -d \" \" -f 3 | cut -d \".\" -f 1"
+COMPOSER_VERSION=$(eval "$COMPOSER_VERSION_COMMAND")
+if [ "$COMPOSER_VERSION" -lt 2 ]
 then
+  echo "${YELLOW_BG}${BLACK_TXT} Theme setup script requires Composer 2. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
+  exit 0;
+fi
+
+# Check if the user actually wants to run the install script or not.
+echo "Would you like to install a theme using the starter theme front-end setup script? (${GREEN_TXT}Y${RESET}/${RED_TXT}N${RESET})";
+read install_theme
+if [ "$install_theme" != 'y' -a "$install_theme" != 'Y' ]
+then
+  echo "${YELLOW_BG}${BLACK_TXT} Theme will not be setup. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
+  exit 0;
+fi
+
+# fe_setup.sh script runs from here on.
 echo What is the theme name? \(This value should be all lowercase, and will replace \'yellowpencil\' in the starter theme.\)
 read theme_name
 echo What is the URL of the project repository? \(This should follow the format \'https://git.yellowpencil.com/yellowpencil/theme-name\'.\)
@@ -11,12 +43,12 @@ then
 SEARCH_R=[Yy]ellow[Pp]encil
 REPLACE=$theme_name
 REPO=$repo_url
+# Check if the theme already exists and is so exit so we don't accidentally
+# overwrite anything.
 if [ -d "$SEARCH_PATH/$REPLACE" -a ! -h "$SEARCH_PATH/$REPLACE" ]
 then
-    BLACK_BG=`tput setaf 0`
+  echo "${YELLOW_BG}${BLACK_TXT} Theme already exists. Please note the rest of the composer install command has still be ran as expected - the theme setup is an optional step. ${RESET}";
-    YELLOW_TXT=`tput setab 3`
+  echo "${YELLOW_BG}${BLACK_TXT} If you are setting up a site please also note that the site installation profile will still be able to be installed. ${RESET}";
-    RESET=`tput sgr0`
-    echo "${YELLOW_TXT}${BLACK_BG} Theme already exists. ${RESET}";
   exit 0;
 fi
 git clone git@git.yellowpencil.com:yellowpencil/yp_drupal8_theme.git $SEARCH_PATH/$REPLACE
@@ -35,5 +67,4 @@ then
 PACKAGE_FILE=$(find ${SEARCH_PATH}/${REPLACE} -type f -name "package.json" -print0)
 sed -i '' -e "s/${SEARCH_R}/${REPLACE}/g" $PACKAGE_FILE
 sed -i '' -e "s,https:\/\/[^\"#]*,${REPO},g" $PACKAGE_FILE
-  echo $REPO_REPLACE
+echo "${GREEN_TXT}The '${theme_name}' theme has been successfully created.${RESET}";
-fi