Refactor Metacat Docker Image to Allow Overlay of Arbitrary Files

[vchendrix]

We need to refactor the Metacat Docker image to support overlaying arbitrary files onto a deployed image. This feature is required to handle new OSTI eLink jar files, but it should be general enough to allow any file path to be rsynced to /usr/local/tomcat/webapps/$METACAT_APP_CONTEXT.

Implementation Steps

• Modify the docker-entrypoint.sh script to include logic that rsyncs any files placed in /tmp/files (with relative paths) to /usr/local/tomcat/webapps/$METACAT_APP_CONTEXT after the app context directory is set up.
• Ensure that the skins also use this general method for file overlay.
• Solicit feedback and suggestions from the maintainers on the proposed approach.

Snippet for docker-entrypoint.sh

Insert the following snippet to sync arbitrary files placed in /tmp/files to /usr/local/tomcat/webapps/$METACAT_APP_CONTEXT:

# Overlay arbitrary files
if [ -d /tmp/files ]; then
    echo
    echo '**************************************'
    echo "Overlaying files from /tmp/files"
    echo '**************************************'
    echo
    rsync -av /tmp/files/ /usr/local/tomcat/webapps/$METACAT_APP_CONTEXT/
fi

This snippet should be placed before the line that starts Tomcat:

# Insert here before Tomcat start
# Start tomcat
$@ > /dev/null 2>&1

Snippet for Skins Logic

Update the skins logic to use the general method for file overlay. Replace the existing skin synchronization block with the following:

# Synchronize skins
if [ -d ${METACATUI_CUSTOM_SKINS_PATH} ]; then
    echo
    echo '**********************************************************'
    echo "Synchronizing skins from ${METACATUI_CUSTOM_SKINS_PATH}"
    echo '***********************************************************'
    echo
    rsync -av ${METACATUI_CUSTOM_SKINS_PATH}/ ${METACAT_DIR}/style/skins/
fi

This snippet should replace the existing block from line 66 to line 111.