Fix mets.xml for easy cases

fix-mets-xlink-hrefs.sh

#!/bin/sh
# Fix mets.xml for easy cases

xmlstarlet sel -N mets=http://www.loc.gov/METS/ -t -m "//mets:FLocat" -v "@xlink:href" -n mets.xml | while read f; do
  if echo "$f" | grep -q "^http://"; then
    continue
  fi

  if [ ! -e $f ]; then
    echo "$f does not exist"

    for try_ext in .xml .tif; do
      try_f="$f$try_ext"
      if [ -e "$try_f" ]; then
        echo "💡 but $try_f exists, fixing"

        xmlstarlet ed --inplace -N mets=http://www.loc.gov/METS/ --update "//mets:FLocat[@xlink:href='$f']/@xlink:href" --value "$try_f" mets.xml
      fi
    done
  fi
done