Implemented 'datasette publish one.db two.db' command

Closes #26

Dockerfile

@@ -1,7 +0,0 @@
-FROM python:3
-COPY . /app
-WORKDIR /app
-RUN pip install .
-RUN datasite build
-EXPOSE 8006
-CMD ["datasite", "serve", "--port", "8006"]

datasette/cli.py

@@ -1,6 +1,10 @@
 import click
 from click_default_group import DefaultGroup
+import os
+from subprocess import call
+import tempfile
 from .app import Datasette, ensure_build_metadata
+from .utils import make_dockerfile
 
 
 @click.group(cls=DefaultGroup, default='serve', default_if_no_args=True)
@@ -16,6 +20,30 @@ def build(files):
     ensure_build_metadata(files, True)
 
 
+@cli.command()
+@click.argument('files', type=click.Path(exists=True), nargs=-1)
+def publish(files):
+    tmp = tempfile.TemporaryDirectory()
+    # We create a datasette folder in there to get a nicer now deploy name
+    datasette_dir = os.path.join(tmp.name, 'datasette')
+    os.mkdir(datasette_dir)
+    saved_cwd = os.getcwd()
+    file_paths = [
+        os.path.join(saved_cwd, name)
+        for name in files
+    ]
+    try:
+        dockerfile = make_dockerfile(files)
+        os.chdir(datasette_dir)
+        open('Dockerfile', 'w').write(dockerfile)
+        for path, filename in zip(file_paths, files):
+            os.link(path, os.path.join(datasette_dir, filename))
+        call('now')
+    finally:
+        tmp.cleanup()
+        os.chdir(saved_cwd)
+
+
 @cli.command()
 @click.argument('files', type=click.Path(exists=True), nargs=-1)
 @click.option('-h', '--host', default='0.0.0.0')

datasette/utils.py

@@ -115,3 +115,17 @@ _css_re = re.compile(r'''['"\n\\]''')
 
 def escape_css_string(s):
     return _css_re.sub(lambda m: '\\{:X}'.format(ord(m.group())), s)
+
+
+def make_dockerfile(files):
+    return '''
+FROM python:3
+COPY . /app
+WORKDIR /app
+RUN pip install https://static.simonwillison.net/static/2017/datasette-0.1-py3-none-any.whl
+RUN datasette build {}
+EXPOSE 8006
+CMD ["datasette", "serve", {}, "--port", "8006"]'''.format(
+        ' '.join(files),
+        '"' + '", "'.join(files) + '"',
+    ).strip()