improved readabality

lib/functions.sh

@@ -3,30 +3,22 @@
 ##
 # return 0 (true) if array (passed by name) contains element
 # usage:
-#   ARRAY = ( a b c )
+#   ARRAY=( a b c )
 #   containsElement ARRAY 'a' => 0
-containsElement() {
-  local -a 'arraykeys=("${!'"$1"'[@]}")'
-  if $(isArray $1); then
-    for index in ${arraykeys[*]}; do
-      current=$1"[$index]"
-      [[ "${!current}" == "$2" ]] && return 0 # found
-    done
-    return 1 # not found
-  else
-    echo >&2 "ERROR: $1 not an array!"
-    return 2 # not an array
-  fi
+function containsElement {
+  isArray "$1" || (echo >&2 "ERROR: <$1> not an array!" && return 2)
+  array_inter="$1[@]"
+  array=("${!array_inter}")
+  for i in "${array[@]}"; do [[ "$i" == "$2" ]] && return 0; done
+  return 1
 }
 
-isArray() {
-  [[ "$(declare -p $1 2>/dev/null)" =~ "declare -a" ]] && return 0 # is an array
-  return 1                                                         # not an array
+## return 0 (true) if arg1 (passed by name) is an array
+function isArray {
+  [[ "$(declare -p "$1" 2>/dev/null)" =~ "declare -a" ]] || return 1
 }
 
-##
-#
-askConfirmation() {
+function askConfirmation {
   case "$1" in
   y | Y | yes | YES)
     QUESTION="(Y/n)?"
@@ -37,7 +29,7 @@ askConfirmation() {
     DEFAULT=1
     ;;
   esac
-  read -p "$QUESTION : " choice
+  read -rp "$QUESTION : " choice
   case "$choice" in
   y | Y | yes | YES) return 0 ;; #true
   n | no | N | NO) return 1 ;;   #false

tools/append_or_replace

@@ -1,22 +1,19 @@
 #!/bin/bash
 
-usage() {
-	echo "Usage: $(basename "$0") <REGEX> <STRING> <FILE>"
+function usage {
+	builtin echo "Usage: $(basename "$0") <REGEX> <STRING> <FILE>"
 }
 
-if [[ $# -ne 3 ]]; then
-	usage
-	exit 2
-fi
+[[ $# -ne 3 ]] && usage && exit 2
 
 REGEX=$1
 STRING=$2
 FILE=$3
 
 if ! grep -Eq "$REGEX" "$FILE"; then
-	printf "$STRING\n" >>$FILE
-	echo appended
+	printf "%s\n" "$STRING" >>"$FILE"
+	echo 'appended'
 else
-	sed -Ei "s|$REGEX|$STRING|g" $FILE
-	echo replaced
+	sed -Ei "s|$REGEX|$STRING|g" "$FILE"
+	echo 'replaced'
 fi

tools/erase_lines

@@ -3,7 +3,7 @@
 # Clears the entire current line regardless of terminal size.
 # See the magic by running:
 # { sleep 1; clear_this_line ; }&
-clear_this_line(){
+clear_this_line() {
         printf '\r'
         cols="$(tput cols)"
         for i in $(seq "$cols"); do
@@ -16,7 +16,7 @@ clear_this_line(){
 # Usage: erase_lines [AMOUNT]
 # See the magic by running:
 # { sleep 1; erase_lines 2; }&
-erase_lines(){
+erase_lines() {
         # Default line count to 1.
         test -z "$1" && lines="1" || lines="$1"
 
@@ -30,10 +30,10 @@ erase_lines(){
         if [ "$lines" = 1 ]; then
                 clear_this_line
         else
-                lines=$((lines-1))
+                lines=$((lines - 1))
                 clear_this_line
                 for i in $(seq "$lines"); do
-                        printf "$UP"
+                        buildtin echo "$UP"
                         clear_this_line
                 done
         fi

tools/genpasswd

@@ -2,11 +2,13 @@
 
 SIZE=${1:-12}
 re='^[0-9]+$'
-if ! [[ $SIZE =~ $re ]] ;then
-	echo "error: SIZE=$SIZE Not a number" >&2; exit 1
+if ! [[ $SIZE =~ $re ]]; then
+	echo "error: SIZE=$SIZE Not a number" >&2
+	exit 1
 fi
 if [[ $SIZE -lt 4 || $SIZE -gt 20 ]]; then
-	echo "expected SIZE=$SIZE not in range [4..20]" >&2; exit 1
+	echo "expected SIZE=$SIZE not in range [4..20]" >&2
+	exit 1
 fi
 
-tr -cd '[:alnum:]' < /dev/urandom | fold -w $SIZE | head -n1
+tr -cd '[:alnum:]' </dev/urandom | fold -w "$SIZE" | head -n1

tools/semver_git_tag

@@ -94,7 +94,7 @@ fi
 COMMAND="${1:-ask}"
 if [[ $COMMAND == 'ask' ]]; then
 	echo -n "Press 'M' for Major, 'm' for minor, 'p' for patch ? "
-	read -n1 input
+	read -rn1 input
 	echo
 	COMMAND="-$input"
 fi

uninstall.sh

@@ -1,15 +1,14 @@
 #!/bin/bash
 
-[ `id -u` -ne 0 ] && echo 'root privilege required' && exit 1
+[ "$(id -u)" -ne 0 ] && echo 'root privilege required' && exit 1
 
 BASEDIR=$PWD
-[ ! $BASEDIR == '/opt/miaou-bash' ] && echo 'should be installed in /opt/miaou-bash directory' && exit 1
+[ ! "$BASEDIR" == '/opt/miaou-bash' ] && echo 'should be installed in /opt/miaou-bash directory' && exit 1
 
 ORIGINAL="ORIGINAL"
 declare -a arr=(/etc/bash.bashrc /etc/inputrc /etc/vim/vimrc)
 
-for i in "${arr[@]}"
-do
+for i in "${arr[@]}"; do
     if [ -f "$i.$ORIGINAL" ]; then
         echo "uninstalling $i"
         rm "$i"
@@ -18,4 +17,3 @@ do
         echo "$i" not overriden
     fi
 done
-