Update iconizer.sh for Xcode 14

Apple announced support for single-size app icons for Xcode 14 at WWDC 2022.

xcode/iconizer.sh

@@ -1,52 +1,78 @@
 #!/bin/bash
 set -euo pipefail
 
-# Iconizer shell script by Stefan Herold
+# Iconizer shell script by Stefan Herold and Yunus Tür
 
 # This is a simple tool to generate all necessary app icon sizes from one vector file.
 # To use: specify the path to your vector graphic (PDF format)
-# Example: sh iconizer.sh MyVectorGraphic.pdf
+# Example: sh iconizer.sh VectorGraphic.pdf AppIcon.appiconset
 
 # Requires ImageMagick: http://www.imagemagick.org/
 # Requires jq: https://stedolan.github.io/jq/
 
+# Variables
+
+PDF_PATH=""
+APP_ICON_SET_PATH=""
 CONTENTS_FILE="Contents.json"
+CONTENTS_PATH=""
+IMAGES_LENGTH=0
 
-die () {
-  echo >&2 "$@"
-  exit 1
-}
+# Functions
+
+checkInputs() {
+  ([ $1 != "null" ] && [ $2 != "null" ]) || die "Usage: sh iconizer.sh <IMAGE_PATH.pdf> <APP_ICON_PATH.appiconset>"
+  ([ -e "$1" ] && [ ${1: -4} == ".pdf" ]) || die "Did not find file $1, expected path to an image file with .pdf extension."
+  ([ -e "$2" ] && [ ${2: -11} == ".appiconset" ]) || die "Did not find folder $2, expected path should end with .appiconset extension."
+
+  PDF_PATH=$1
+  APP_ICON_SET_PATH=$2
+  CONTENTS_PATH="$APP_ICON_SET_PATH/$CONTENTS_FILE"
+
+  [ -e "$CONTENTS_PATH" ] || die "Did not find $CONTENTS_PATH. Appiconset must contain a $CONTENTS_FILE file."
 
-[ $# == 2 ] || die "Usage: sh iconizer.sh <file name> <path to *.appiconset>"
-[ -e "$1" ] || die "Did not find file $1, expected path to an image file."
+  IMAGES_LENGTH=$(jq ".images | length" $CONTENTS_PATH)
 
-CONTENT_FILE_PATH="$2/$CONTENTS_FILE"
+  ([ "$IMAGES_LENGTH" != "null" ] && (($IMAGES_LENGTH > 0))) || die "Did not find any images in $CONTENTS_PATH"
+}
+
+generateImages() {
+  echo "Creating icons from $APP_ICON_SET_PATH and updating $CONTENTS_PATH..."
+  for ((i = 0; i < $IMAGES_LENGTH; ++i)); do
+    generateImage $i
+  done
+  echo "All Done 🎉🎉🎉"
+}
 
-[ -e "$CONTENT_FILE_PATH" ] || die "Did not find $CONTENT_FILE_PATH, expected folder which contains $CONTENTS_FILE"
+generateImage() {
+  image=$(jq ".images[$1]" $CONTENTS_PATH)
 
-echo "Creating icons from $1 and updating $CONTENT_FILE_PATH..."
+  scale=$(echo $image | jq -r ".scale" | cut -d "x" -f 1)
+  [ $scale != "null" ] || scale=1
 
-i=0
+  sizePT=$(echo $image | jq -r ".size" | cut -d "x" -f 1)
+  sizePX=$(bc -l <<<"scale=1; $sizePT*$scale" | cut -d "." -f 1)
+  newFileName="appicon_${sizePX}.png"
 
-while :
-do
-    image=$(jq ".images[$i]" $CONTENT_FILE_PATH)
-    scale=$(echo $image | jq ".scale" | cut -d "\"" -f 2 | cut -d "x" -f 1 )
-    sizePT=$(echo $image | jq ".size" | cut -d "\"" -f 2 | cut -d "x" -f 1 )
-    sizePX=$(bc -l <<< "scale=1; $sizePT*$scale" | cut -d "." -f 1)
-    newFileName="appicon_${sizePX}.png"
+  echo -n "Updading $CONTENTS_FILE to $newFileName"
+  jq ".images[$1].filename = \"$newFileName\"" "$CONTENTS_PATH" >tmp.$$.json && mv tmp.$$.json "$CONTENTS_PATH"
+  echo " ✅"
 
-    [ "$image" != "null" ] || break
+  if [ -e "$APP_ICON_SET_PATH/$newFileName" ]; then
+    echo "File $newFileName already created... Continue ✅"
+  else
+    echo -n "Generating $newFileName"
+    convert -density 400 "$PDF_PATH" -scale "$sizePX" "$APP_ICON_SET_PATH/$newFileName"
+    echo " ✅"
+  fi
+}
 
-    jq ".images[$i].filename = \"$newFileName\"" "$CONTENT_FILE_PATH" > tmp.$$.json && mv tmp.$$.json "$CONTENT_FILE_PATH"
+die() {
+  echo >&2 "$@"
+  exit 1
+}
 
-    if [ -e "$2/$newFileName" ]; then
-      echo "File $newFileName already created... Continue"
-    else
-      echo -n "Creating $newFileName and update $CONTENTS_FILE..."
-      convert -density 400 "$1" -scale "$sizePX" "$2/$newFileName"
-      echo "✅"
-    fi
+# Logics
 
-    i=$(( $i + 1 ))
-done
+checkInputs ${1-null} ${2-null}
+generateImages