Add script to automatically split double pages in manga

arch-config/scripts/pieces/manga-double-split.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -euo pipefail
+shopt -s extglob
+
+if [ $# -ne 1 ]; then
+    echo "Please use this script with a \"PATH\" to a folder your manga images"
+    $(exit 1); echo "$?"
+fi
+
+dir=$1
+
+cd "$dir"
+
+out="$(basename "$dir")-cropped"
+
+# create a new directory to put our final cropped images
+mkdir -p "../$out"
+
+readarray -d '' images < <(find . -name "*\.jpeg" -print0)
+
+for image in "${images[@]}"; do
+    # strip ./ from images and output current working on
+    echo "Working on ${image#./}"
+    noext="${image%.*}"
+    ratio=$(identify -format "%[fx:w/h]" "$image")> /dev/null
+    # get the image number
+    num=$(echo "$noext" | grep -Eoe [0-9]{3})
+    # strip leading 0s
+    num="${num##+(0)}"
+    [[ -z "${num}" ]] && num=0
+    if (( $(echo "$ratio > 1" |bc -l) )); then
+        # crop image in half
+        convert -crop 50%x100% "$image" "../$out/$noext-%d.jpeg"
+        # rename the -1, which is the first page to the original name
+        mv "../$out/$noext-1.jpeg" "../$out/page${num}.jpeg"
+        # increment image number
+        ((num++))
+        # rename -0 to original image + 1 name
+        mv "../$out/$noext-0.jpeg" "../$out/page${num}.jpeg"
+    else
+        # move all other images
+        mv "$image" "../$out/page${num}.jpeg"
+    fi
+done