The `retry` script is required for CI_RETRY_EXE and there are two ways
to put it into PATH:
* When running in a container engine, by copying it into /usr/bin
* When running without a container engine, by prepending its location to PATH
Docker currently warns that we are missing a default value.
Set this to scratch which will error if an appropriate image tag is not
passed in to silence the warning.
This sets the build dir at build time so that Apple SDK gets installed
in the correct/expected location for the runtime to find it.
Co-authored-by: Max Edwards <youwontforgetthis@gmail.com>
This should fix the macOS-cross build on Cirrus CI containers.
Locally this was already working, because the SDK was cached in
/ci_container_base/ in the image, which is also the folder used for a
later CI run.
However, on Cirrus CI, when using an image *and* a custom BASE_ROOT_DIR,
the SDK will not be found in /ci_base_install/, nor in BASE_ROOT_DIR.
Fix this by normalizing *all* folders to /ci_container_base/.
(Similar to the doc comment in ci/lint_imagefile)
Also, rename docker-entrypoint.sh to container-entrypoint.sh
Also, add copyright header to touched files.
