Rename Screenshotter -> screenshotter (#1573)

Fix #1570

dockers/screenshotter/screenshotter.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# This script does a one-shot creation of screenshots, creating needed
+# docker containers and removing them afterwards.  During development,
+# it might be desirable to avoid the overhead for starting and
+# stopping the containers.  Developers are encouraged to manage
+# suitable containers themselves, calling the screenshotter.js script
+# directly.
+
+cleanup() {
+    [[ "${container}" ]] \
+        && docker stop "${container}" >/dev/null \
+        && docker rm "${container}" >/dev/null
+    container=
+}
+
+container=
+trap cleanup EXIT
+status=0
+for browserTag in firefox:2.48.2 chrome:2.48.2; do
+    browser=${browserTag%:*}
+    image=selenium/standalone-${browserTag}
+    echo "Starting container for ${image}"
+    container=$(docker run -d -P ${image})
+    [[ ${container} ]] || continue
+    echo "Container ${container:0:12} started, creating screenshots..."
+    if node "$(dirname "$0")"/screenshotter.js \
+            --browser="${browser}" --container="${container}" "$@"; then
+        res=Done
+    else
+        res=Failed
+        status=1
+    fi
+    echo "${res} taking screenshots, stopping and removing ${container:0:12}"
+    cleanup
+done
+exit ${status}