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build(bake): escape variable interpolation in bake definition 

Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
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David Karlsson 2024-10-17 10:49:04 +02:00
parent b0c0082085
commit a11c11fbbb
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content/manuals/build/bake/variables.md
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@ -78,6 +78,35 @@ $ docker buildx bake --print
}
```
## Escape variable interpolation
If you want to bypass variable interpolation when parsing the Bake definition,
use double dollar signs (`$${VARIABLE}`).
```hcl
target "default" {
dockerfile-inline = <<EOF
FROM alpine
ARG TARGETARCH
RUN echo "Building for $${TARGETARCH/amd64/x64}"
EOF
platforms = ["linux/amd64", "linux/arm64"]
}
```
```console
$ docker buildx bake --progress=plain
...
#8 [linux/arm64 2/2] RUN echo "Building for arm64"
#8 0.036 Building for arm64
#8 DONE 0.0s
#9 [linux/amd64 2/2] RUN echo "Building for x64"
#9 0.046 Building for x64
#9 DONE 0.1s
...
```
## Using variables in variables across files
When multiple files are specified, one file can use variables defined in