1. Layerfile Reference
  2. WAIT

WAIT [layerfile paths...]

The WAIT instruction allows you to make one step require other steps to succeed before running.

It’s especially useful for conditional actions like executing notifications, deployment, and CI/CD.

Examples

Continuous deployment with WAIT

Layerfile
# at deploy/Layerfile
FROM vm/ubuntu:18.04

# Wait for the layerfiles at /unit-tests/Layerfile and /acceptance-tests/Layerfile
WAIT /unit-tests /acceptance-tests

RUN ./notify-slack.sh
RUN ./deploy.sh

Conditional deployment with WAIT and BUTTON

Layerfile
# at deploy/Layerfile
FROM vm/ubuntu:18.04

# Wait for the layerfiles at /unit-tests/Layerfile and /acceptance-tests/Layerfile
WAIT /unit-tests /acceptance-tests

RUN ./notify-slack.sh
BUTTON deploy?
RUN ./deploy.sh

What the job view will look like with WAIT

Advanced workflow graph example