Loop over directories, where name of root dir is retrieved from a variable

Question

There are tons of example out there that show how to loop over directories in a directory with bash. However, I encounter the problem, that the root directory, which is retrieved from a variable, is obviously not resolved correctly.

The idea is to symlink folders from a "package" root folder to "public/typo3conf/ext". This is the folder structure:

project-root

• packages -- project_1 -- project_2
• public -- typo3conf ---ext

The "packages" folder is defined in a yaml file under the "PACKAGES" var and also defined as a fallback option. Another variable, "DOCROOT", points to the "public" folder.

The bash script I use looks like this:

for ext in "${PACKAGES:-packages}/*"; do
pwd # <- just to insure we are on the right level
echo "$ext" # <- this result in "packages/*"
if [ -d "${ext}" ] && [ ! -d "${DOCROOT}/typo3conf/ext/${ext##*/}" ]; then
    echo -e "  $ext -> ${DOCROOT}/typo3conf/ext/${ext##/}"
    ln -frs "$ext" "${DOCROOT}/typo3conf/ext/${ext##/}"
  fi
done

This does not work, though: the "ext" variable resolves to "packages/*".

What am I doing wrong?