def _docker_build(cls, external_path):
cls._check_for_support_lib_sdist(external_path)
internal_path = PurePosixPath("/project")
command = " ".join(cls._make_pip_command(internal_path))
LOG.debug("command is '%s'", command)
volumes = {
str(external_path): {
"bind": str(internal_path),
"mode": "rw"
}
}
image = f"lambci/lambda:build-{cls.RUNTIME}"
LOG.warning(
"Starting Docker build. This may take several minutes if the "
"image '%s' needs to be pulled first.",
image,
)
docker_client = docker.from_env()
try:
logs = docker_client.containers.run(
image=image,
command=command,
auto_remove=True,
volumes=volumes,
stream=True,
user=f"{os.geteuid()}:{os.getgid()}",
)
except RequestsConnectionError as e:
# it seems quite hard to reliably extract the cause from
# ConnectionError. we replace it with a friendlier error message
# and preserve the cause for debug traceback
cause = RequestsConnectionError(
"Could not connect to docker - is it running?")
cause.__cause__ = e
raise DownstreamError("Error running docker build") from cause
except (ContainerError, ImageLoadError, APIError) as e:
raise DownstreamError("Error running docker build") from e
LOG.debug("Build running. Output:")
for line in logs:
LOG.debug(line.rstrip(b"\n").decode("utf-8"))
