update_coverage_html.sh

#! /bin/bash

BROWSER=Chrome
CANCELLED=0
COVERAGE_DATA=.coverage
COVERAGE_REPORT_DIR=htmlcov
POLL_INTERVAL=5

trap ctrl_c INT

function refresh_browser() {
    /usr/bin/osascript <<-APPLESCRIPT
        tell application "Chrome" to tell the active tab of its first window
            reload
        end tell
APPLESCRIPT
}

function ctrl_c() {
    CANCELLED=1
}

while [ "$CANCELLED" -eq "0" ]; do
    if [ -r "${COVERAGE_DATA}" ]; then
        if [ "${COVERAGE_DATA}" -nt "${COVERAGE_REPORT_DIR}" ] || [ ! -d "${COVERAGE_REPORT_DIR}" ]; then
            echo "$(date) generating HTML report..."
            if coverage html; then
                echo "$(date) refreshing ${BROWSER}..."
                refresh_browser
                touch "${COVERAGE_REPORT_DIR}"
            else
                >2 echo "error generating coverage report"
            fi
        fi
    fi
    sleep ${POLL_INTVERVAL:-5}
done