Simple maintenance improvements (#1255)

* Use direct check for existence of file

* Fix shellcheck warnings

* Unify codestyle in scripts

* Trim excess whitespace

README.md

@@ -23,5 +23,3 @@ Also be aware that the `arkenfox user.js` is made specifically for desktop Firef
 
 ### 🟥  acknowledgments
 Literally thousands of sources, references and suggestions. Many thanks, and much appreciated.
-
-

prefsCleaner.sh

@@ -20,7 +20,7 @@ cd "$(dirname "${sfp}")"
 fQuit() {
 	## change directory back to the original working directory
 	cd "${currdir}"
-	[ $1 -eq 0 ] && echo -e "\n$2" || echo -e "\n$2" >&2
+	[ "$1" -eq 0 ] && echo -e "\n$2" || echo -e "\n$2" >&2
 	exit $1
 }
 
@@ -36,7 +36,7 @@ fFF_check() {
 	# this isn't elegant and might not be future-proof but should at least be compatible with any environment
 	while [ -e lock ]; do
 		echo -e "\nThis Firefox profile seems to be in use. Close Firefox and try again.\n" >&2
-		read -p "Press any key to continue."
+		read -r -p "Press any key to continue."
 	done
 }
 
@@ -48,7 +48,7 @@ fClean() {
 		if [[ "$line" =~ $prefexp && $prefs != *"@@${BASH_REMATCH[1]}@@"* ]]; then
 			prefs="${prefs}${BASH_REMATCH[1]}@@"
 		fi
-	done <<< "`grep -E \"$prefexp\" user.js`"
+	done <<< "$(grep -E \"$prefexp\" user.js)"
 
 	while IFS='' read -r line || [[ -n "$line" ]]; do
 		if [[ "$line" =~ ^$prefexp ]]; then

scratchpad-scripts/arkenfox-clear-RFP-alternatives.js

@@ -69,4 +69,3 @@
   return 'all done';
 
 })();
-

scratchpad-scripts/troubleshooter.js

@@ -1,4 +1,3 @@
-
 /*** arkenfox user.js troubleshooter.js v1.6.3 ***/
 
 (function() {

updater.sh

@@ -41,9 +41,9 @@ ESR=false
 
 # Download method priority: curl -> wget
 DOWNLOAD_METHOD=''
-if [[ $(command -v 'curl') ]]; then
+if command -v curl >/dev/null; then
   DOWNLOAD_METHOD='curl --max-redirs 3 -so'
-elif [[ $(command -v 'wget') ]]; then
+elif command -v wget >/dev/null; then
   DOWNLOAD_METHOD='wget --max-redirect 3 --quiet -O'
 else
   echo -e "${RED}This script requires curl or wget.\nProcess aborted${NC}"
@@ -123,7 +123,7 @@ readIniFile () { # expects one argument: absolute path of profiles.ini
   declare -r inifile="$1"
 
   # tempIni will contain: [ProfileX], Name=, IsRelative= and Path= (and Default= if present) of the only (if) or the selected (else) profile
-  if [ $(grep -c '^\[Profile' "${inifile}") -eq "1" ]; then ### only 1 profile found
+  if [ "$(grep -c '^\[Profile' "${inifile}")" -eq "1" ]; then ### only 1 profile found
     tempIni="$(grep '^\[Profile' -A 4 "${inifile}")"
   else
     echo -e "Profiles found:\n––––––––––––––––––––––––––––––"
@@ -176,7 +176,7 @@ getProfilePath () {
 
 # Returns the version number of a updater.sh file
 get_updater_version() {
-  echo $(sed -n '5 s/.*[[:blank:]]\([[:digit:]]*\.[[:digit:]]*\)/\1/p' "$1")
+  echo "$(sed -n '5 s/.*[[:blank:]]\([[:digit:]]*\.[[:digit:]]*\)/\1/p' "$1")"
 }
 
 # Update updater.sh
@@ -185,13 +185,13 @@ get_updater_version () {
 #   -d: New version will not be looked for and update will not occur
 #   -u: Check for update, if available, execute without asking
 update_updater() {
-  [ $UPDATE = 'no' ] && return 0 # User signified not to check for updates
+  [ "$UPDATE" = 'no' ] && return 0 # User signified not to check for updates
 
   declare -r tmpfile="$(download_file 'https://raw.githubusercontent.com/arkenfox/user.js/master/updater.sh')"
   [ -z "${tmpfile}" ] && echo -e "${RED}Error! Could not download updater.sh${NC}" && return 1 # check if download failed
 
   if [[ $(get_updater_version "$SCRIPT_FILE") < $(get_updater_version "${tmpfile}") ]]; then
-    if [ $UPDATE = 'check' ]; then
+    if [ "$UPDATE" = 'check' ]; then
       echo -e "There is a newer version of updater.sh available. ${RED}Update and execute Y/N?${NC}"
       read -p "" -n 1 -r
       echo -e "\n\n"
@@ -212,7 +212,7 @@ update_updater () {
 
 # Returns version number of a user.js file
 get_userjs_version() {
-  [ -e $1 ] && echo "$(sed -n '4p' "$1")" || echo "Not detected."
+  [ -e "$1" ] && echo "$(sed -n '4p' "$1")" || echo "Not detected."
 }
 
 add_override() {
@@ -246,16 +246,16 @@ update_userjs () {
 
   echo -e "Please observe the following information:
     Firefox profile:  ${ORANGE}$(pwd)${NC}
-    Available online: ${ORANGE}$(get_userjs_version $newfile)${NC}
+    Available online: ${ORANGE}$(get_userjs_version "$newfile")${NC}
     Currently using:  ${ORANGE}$(get_userjs_version user.js)${NC}\n\n"
 
-  if [ $CONFIRM = 'yes' ]; then
+  if [ "$CONFIRM" = 'yes' ]; then
     echo -e "This script will update to the latest user.js file and append any custom configurations from user-overrides.js. ${RED}Continue Y/N? ${NC}"
     read -p "" -n 1 -r
     echo -e "\n"
     if [[ $REPLY =~ ^[Nn]$ ]]; then
       echo -e "${RED}Process aborted${NC}"
-      rm $newfile
+      rm "$newfile"
       return 1
     fi
   fi
@@ -269,7 +269,7 @@ update_userjs () {
   # backup user.js
   mkdir -p userjs_backups
   local bakname="userjs_backups/user.js.backup.$(date +"%Y-%m-%d_%H%M")"
-  [ $BACKUP = 'single' ] && bakname='userjs_backups/user.js.backup'
+  [ "$BACKUP" = 'single' ] && bakname='userjs_backups/user.js.backup'
   cp user.js "$bakname" &>/dev/null
 
   mv "${newfile}" user.js
@@ -295,19 +295,19 @@ update_userjs () {
     past_nocomments='userjs_diffs/past_userjs.txt'
     current_nocomments='userjs_diffs/current_userjs.txt'
 
-    remove_comments $pastuserjs $past_nocomments
-    remove_comments user.js $current_nocomments
+    remove_comments "$pastuserjs" "$past_nocomments"
+    remove_comments user.js "$current_nocomments"
 
     diffname="userjs_diffs/diff_$(date +"%Y-%m-%d_%H%M").txt"
-    diff=$(diff -w -B -U 0 $past_nocomments $current_nocomments)
-    if [ ! -z "$diff" ]; then
+    diff=$(diff -w -B -U 0 "$past_nocomments" "$current_nocomments")
+    if [ -n "$diff" ]; then
       echo "$diff" > "$diffname"
       echo -e "Status: ${GREEN}A diff file was created:${NC} ${PWD}/${diffname}"
     else
       echo -e "Warning: ${ORANGE}Your new user.js file appears to be identical.  No diff file was created.${NC}"
-      [ $BACKUP = 'multiple' ] && rm $bakname &>/dev/null
+      [ "$BACKUP" = 'multiple' ] && rm "$bakname" &>/dev/null
     fi
-    rm $past_nocomments $current_nocomments $pastuserjs &>/dev/null
+    rm "$past_nocomments" "$current_nocomments" "$pastuserjs" &>/dev/null
   fi
 
   [ "$VIEW" = true ] && open_file "${PWD}/user.js"
@@ -319,7 +319,7 @@ update_userjs () {
 
 if [ $# != 0 ]; then
   # Display usage if first argument is -help or --help
-  if [ $1 = '--help' ] || [ $1 = '-help' ]; then
+  if [ "$1" = '--help' ] || [ "$1" = '-help' ]; then
     usage
   else
     while getopts ":hp:ludsno:bcvre" opt; do
@@ -363,7 +363,7 @@ if [ $# != 0 ]; then
         r)
           tfile="$(download_file 'https://raw.githubusercontent.com/arkenfox/user.js/master/user.js')"
           [ -z "${tfile}" ] && echo -e "${RED}Error! Could not download user.js${NC}" && exit 1 # check if download failed
-          mv $tfile "${tfile}.js"
+          mv "$tfile" "${tfile}.js"
           echo -e "${ORANGE}Warning: user.js was saved to temporary file ${tfile}.js${NC}"
           open_file "${tfile}.js"
           exit 0
@@ -382,7 +382,7 @@ if [ $# != 0 ]; then
 fi
 
 show_banner
-update_updater $@
+update_updater "$@"
 
 getProfilePath # updates PROFILE_PATH or exits on error
 cd "$PROFILE_PATH" && update_userjs