"datasette publish cloudrun" cannot publish files with spaces in their name

[simonw]

Got this error:

Step 6/9 : RUN datasette inspect fixtures.db extra database.db --inspect-file inspect-data.json
 ---> Running in db9da0068592
Usage: datasette inspect [OPTIONS] [FILES]...
Try 'datasette inspect --help' for help.

Error: Invalid value for '[FILES]...': Path 'extra' does not exist.
The command '/bin/sh -c datasette inspect fixtures.db extra database.db --inspect-file inspect-data.json' returned a non-zero code: 2
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/docker" failed: step exited with non-zero status: 2

While working on the demo for #1232, using this deploy command:

GITHUB_SHA=crossdb datasette publish cloudrun fixtures.db 'extra database.db' \
            -m fixtures.json \
            --plugins-dir=plugins \
            --branch=$GITHUB_SHA \
            --version-note=$GITHUB_SHA \
            --extra-options="--setting template_debug 1 --crossdb" \
            --install=pysqlite3-binary \
            --service=datasette-latest-crossdb

[simonw]

I think the bug is here:

datasette/datasette/utils/__init__.py

Lines 349 to 373 in 640ac70

	return """
	FROM python:3.8
	COPY . /app
	WORKDIR /app
	{apt_get_extras}
	{environment_variables}
	RUN pip install -U {install_from}
	RUN datasette inspect {files} --inspect-file inspect-data.json
	ENV PORT {port}
	EXPOSE {port}
	CMD {cmd}""".format(
	apt_get_extras=APT_GET_DOCKERFILE_EXTRAS.format(" ".join(apt_get_extras))
	if apt_get_extras
	else "",
	environment_variables="\n".join(
	[
	"ENV {} '{}'".format(key, value)
	for key, value in environment_variables.items()
	]
	),
	install_from=" ".join(install),
	files=" ".join(files),
	port=port,
	cmd=cmd,
	).strip()