First CLI command: sqlite-utils table_names test.db

docs/cli.rst

@@ -0,0 +1,17 @@
+.. _python_api:
+
+================================
+ sqlite-utils command-line tool
+================================
+
+The ``sqlite-utils`` command-line tool can be used to manipulate SQLite databases in a number of different ways.
+
+Listing tables
+==============
+
+You can list the names of tables in a database using the ``table_names`` subcommand::
+
+    $ sqlite-utils table_names mydb.db
+    dogs
+    cats
+    chickens

docs/index.rst

@@ -17,6 +17,7 @@ Contents
    :maxdepth: 2
 
    python-api
+   cli
    changelog
 
 Take a look at `this script <https://github.com/simonw/russian-ira-facebook-ads-datasette/blob/master/fetch_and_build_russian_ads.py>`_ for an example of this library in action.

sqlite_utils/cli.py

@@ -1,6 +1,22 @@
 import click
+import sqlite_utils
 
 
-@click.command()
-def cli(*args):
-    click.echo(repr(args))
+@click.group()
+@click.version_option()
+def cli():
+    "Commands for interacting with a SQLite database"
+    pass
+
+
+@cli.command()
+@click.argument(
+    "path",
+    type=click.Path(exists=True, file_okay=True, dir_okay=False, allow_dash=False),
+    required=True,
+)
+def table_names(path):
+    """List the tables in the database"""
+    db = sqlite_utils.Database(path)
+    for name in db.table_names:
+        print(name)

tests/test_cli.py

@@ -0,0 +1,23 @@
+from sqlite_utils import cli
+from click.testing import CliRunner
+import pytest
+import sqlite3
+
+
+CREATE_TABLES = """
+create table Gosh (c1 text, c2 text, c3 text);
+create table Gosh2 (c1 text, c2 text, c3 text);
+"""
+
+
+@pytest.fixture
+def db_path(tmpdir):
+    path = str(tmpdir / "test.db")
+    db = sqlite3.connect(path)
+    db.executescript(CREATE_TABLES)
+    return path
+
+
+def test_table_names(db_path):
+    result = CliRunner().invoke(cli.cli, ["table_names", db_path])
+    assert "Gosh\nGosh2" == result.output.strip()