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Merge pull request #20612 from dvdksn/bake-dedup-localctx 

build(bake): automatically deduplicate context transfers
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David Karlsson 2024-09-10 20:59:47 +02:00 committed by GitHub
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content/manuals/build/bake/contexts.md
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@ -93,6 +93,25 @@ multiple Dockerfiles that can't be easily merged into one.
## Deduplicate context transfer
> **Note**
>
> As of Buildx version 0.17.0 and later, Bake automatically deduplicates
> context transfer for targets that share the same context. In addition to
> Buildx version 0.17.0, the builder must be running BuildKit version 0.16.0 or
> later, and the Dockerfile syntax must be `docker/dockerfile:1.10` or later.
>
> If you meet these requirements, you don't need to manually deduplicate
> context transfer as described in this section.
>
> - To check your Buildx version, run `docker buildx version`.
> - To check your BuildKit version, run `docker buildx inspect --bootstrap` and
> look for the `BuildKit version` field.
> - To check your Dockerfile syntax version, check the `syntax`
> [parser directive](/reference/dockerfile.md#syntax) in your Dockerfile. If
> it's not present, the default version whatever comes bundled with your
> current version of BuildKit. To set the version explicitly, add
> `#syntax=docker/dockerfile:1.10` at the top of your Dockerfile.
When you build targets concurrently, using groups, build contexts are loaded
independently for each target. If the same context is used by multiple targets
in a group, that context is transferred once for each time it's used. This can