Leading underscores in pathComponent?

[joostm1]

I'm attempting to use "snowpark container services", i.e., a container service delivered by snowflake.com. .. As this is a database company, everything over there is in a database, even container registries ...

As it happens, we have a naming scheme for all our databases that start with an underscore, like _dev_xyz_db. This scheme leads to container repository like this:

registry.snowflakecomputing.com/_leading_underscore_db/_leading_underscore_schema/_leading_underscore_container_repo

An attempt to use this URL results in:
ERROR: failed to build: invalid tag "tag=<redacted>.registry.snowflakecomputing.com/_leading_underscore_db/_leading_underscore_schema/_leading_underscore_container_repo": invalid reference format

I think the error originates here, where it is made explicit that a path component must start alphanumeric.

However, names with a leading underscore are valid path components in the rfc3986 URL spec.

Any chance that we can have _name as valid a path component in docker?

[milosgajdos]

I dont believe the specification allows for _ https://github.com/opencontainers/distribution-spec/blob/main/spec.md#pulling-manifests