The provider currently attempts to parse your Dockerfile in case there
are any obviously broken syntax errors.
However, Dockerfiles can use custom syntaxes which are implemented as
their own images. Buildkit detects `# syntax=` directives, pulls the
image, and uses it to parse.
It doesn't make sense for us to attempt to replicate that behavior, so
when we detect a custom syntax we will simply disable this validation.
If there are syntax errors the user will discover them after the build
is attempted.
Fixes https://github.com/pulumi/pulumi-docker-build/issues/300
The `Image` resource already ignores errors during read but the `Index`
resource was requiring the inspect call to always succeed. This will often
fail due to https://github.com/pulumi/pulumi/issues/4981 (note however in
this case credentials are stored with the resource instead of the provider).
This changes our logic to instead emit a warning if the credentials are
invalid.
Fixes https://github.com/pulumi/pulumi-docker-build/issues/121.
I could have sworn the context property was required, but evidently it
isn't and we weren't handling the case when it was missing.
This PR updates things to set a default location of the current
directory if the context is absent. Some unit tests are also added.
Fixes#78.
