Tag Intermediate Build Stages (multi-stage build)

General
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For anyone that is interested in something similar, I’ve found a workaround for now.

Using the LABEL command in my dockerfile I added a label to the build stage I’m interested in, then filter for it later:

FROM node as builder-stage
LABEL builder=true

FROM node as app-stage
LABEL builder=false

Now to filter, sort newest first, cut out the date, and take the top row:
docker images --filter “label=builder=true” --format ‘{{.CreatedAt}}\t{{.ID}}’ | sort -nr | head -n 1 | cut -f2

Note that it is important to remove the label in the next build stage.

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