Helper function to create prettier and more meaningful vagrant provisioning script output. https://github.com/michaelward82/vagrant-provisioning-shell-function-helper for project

vagrant-provisioning.sh

exe () {
    MESSAGE_PREFIX="\b\b\b\b\b\b\b\b\b\b"
    echo -e "$MESSAGE_PREFIX Execute: $1"
    LOOP=0
    while true;
    do
        if ! [ $LOOP == 0 ]; then echo -e "$MESSAGE_PREFIX ...     "; fi;
        sleep 3;
        LOOP=$((LOOP+1))
    done & ERROR=$("${@:2}" 2>&1)
    status=$?
    kill $!; trap 'kill $!' SIGTERM

    if [ $status -ne 0 ];
    then
        echo -e "$MESSAGE_PREFIX ✖ Error" >&2
        echo -e "$ERROR" >&2
    else
        echo -e "$MESSAGE_PREFIX ✔ Success"
    fi
    return $status
}

# Use as:
# exe "Update apt indexes" sudo apt-get update
# exe "Disable default vhost" sudo a2dissite 000-default
#
# Output:
# 
# ==> Execute: Update apt indexes
# ==> ...      
# ==> ...      
# ==> ...      
# ==> ✔ Success
# ==> Execute: Disable default vhost
# ==> ✔ Success

The intention of this script is to reduce inaccurate red messages shown by vagrant when commands output to stderr. As not all output to stderr is an error, it can prove difficult to spot genuine errors in your provisioning script.

The exe function allows a command to be executed (coupled with a 3 second looping progress indicator for slower processes), with all progress output sent to stdout and showing green in vagrant. In the event of a command returning a non zero status, an indicator of failure in unix, the output of the command is send to stderr - showing red in vagrant.

Example output using exe function, with no errors:

Example output using exe function, with error:

Default output from executing commands directly, no actual errors: