Fix parameter expansions in scripts/

scripts/commit_changed_repos.sh

 #!/bin/bash
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/packages
 
 for dir in $(ls $PACKAGES_PATH);

scripts/correct_arch_array.sh

 #!/bin/zsh
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/packages
 
 for i in $(ls $PACKAGES_PATH);
 do
-	if pacman -Si $i | egrep -q 'cpp|boost'; then
+	if pikaur -Si $i | egrep -q 'cpp|boost'; then
 		echo "$i contains c++ code"
 		if ! grep "('any')" $PACKAGES_PATH/$i/PKGBUILD; then
 			echo "$i already has a correct arch=() array"
@@ -24,4 +24,4 @@ do
 	else
 		echo "$i does NOT contain c++ code";
 	fi
-done
\ No newline at end of file
+done

scripts/delete_unnecessary_cmake_flags.sh

 #!/bin/zsh
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/packages
 
 for i in $(ls $PACKAGES_PATH);

scripts/fix-eigen.sh

 #!/bin/zsh
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/packages
 
 for i in $(ls $PACKAGES_PATH);

scripts/fix-tbb.sh

 #!/bin/zsh
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/packages
 
 for i in $(ls $PACKAGES_PATH);

scripts/set-python3.sh

 #!/bin/zsh
 
-CACHE_PATH=${XDG_CACHE_HOME+"~/.cache"}
+CACHE_PATH=${XDG_CACHE_HOME:-"$HOME/.cache"}
 PACKAGES_PATH=$CACHE_PATH/ros-aur-helper/\$PACKAGES_PATH
 
 for i in $(ls $PACKAGES_PATH);