let's keep good ol mogrify around

mogrify.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# check for mogrify
+which mogrify > /dev/null
+if [[ $? -ne 0 ]]
+then
+  echo "mogrify not found, run the following:"
+  echo "sudo apt install imagemagick"
+  exit 1
+fi
+
+# finds pattern [number]x[number]
+REGEX="([0-9]+)x[0-9]+"
+MAX_WIDTH=1200
+
+for FILE in $(find src/img)
+do
+  # skip directories
+  if [ -d $FILE ]
+  then
+    continue
+  fi
+
+  # `identify` prints out file info incl. dimensions in pixels
+  if [[ $(identify $FILE) =~ $REGEX ]]
+  then
+    # regex capture groups
+    WIDTH=${BASH_REMATCH[1]}
+
+    # resize if too large
+    if (( $WIDTH > $MAX_WIDTH ))
+    then
+      echo "resizing $FILE with width $WIDTH"
+      mogrify -resize 1200x $FILE
+    fi
+  fi
+done