install and uninstall commands, closes #483

docs/cli-reference.rst

@@ -59,6 +59,8 @@ This page lists the ``--help`` for every ``sqlite-utils`` CLI sub-command.
         "convert": "cli_convert",
         "add-geometry-column": "cli_spatialite",
         "create-spatial-index": "cli_spatialite_indexes",
+        "install": "cli_install",
+        "uninstall": "cli_uninstall",
     }
     commands.sort(key = lambda command: go_first.index(command) if command in go_first else 999)
     cog.out("\n")
@@ -1349,6 +1351,42 @@ See :ref:`cli_drop_view`.
       -h, --help             Show this message and exit.
 
 
+.. _cli_ref_install:
+
+install
+=======
+
+See :ref:`cli_install`.
+
+::
+
+    Usage: sqlite-utils install [OPTIONS] PACKAGES...
+
+      Install packages from PyPI into the same environment as sqlite-utils
+
+    Options:
+      -U, --upgrade  Upgrade packages to latest version
+      -h, --help     Show this message and exit.
+
+
+.. _cli_ref_uninstall:
+
+uninstall
+=========
+
+See :ref:`cli_uninstall`.
+
+::
+
+    Usage: sqlite-utils uninstall [OPTIONS] PACKAGES...
+
+      Uninstall Python packages from the sqlite-utils environment
+
+    Options:
+      -y, --yes   Don't ask for confirmation
+      -h, --help  Show this message and exit.
+
+
 .. _cli_ref_add_geometry_column:
 
 add-geometry-column

docs/cli.rst

@@ -2116,3 +2116,29 @@ Once you have a geometry column, you can speed up bounding box queries by adding
     $ sqlite-utils create-spatial-index spatial.db locations geometry
 
 See this `SpatiaLite Cookbook recipe <http://www.gaia-gis.it/gaia-sins/spatialite-cookbook-5/cookbook_topics.03.html#topic_Wonderful_RTree_Spatial_Index>`__ for examples of how to use a spatial index.
+
+.. _cli_install:
+
+Installing packages
+-------------------
+
+The :ref:`insert -\\-convert <cli_insert_convert>` and :ref:`query -\\-functions <cli_query_functions>` options can be provided with a Python script that imports additional modules from the ``sqlite-utils`` environment.
+
+You can install packages from PyPI directly into the correct environment using ``sqlite-utils install <package>``. This is a wrapper around ``pip install``.
+
+::
+
+    $ sqlite-utils install beautifulsoup4
+
+Use ``-U`` to upgrade an existing package.
+
+.. _cli_uninstall:
+
+Uninstalling packages
+---------------------
+
+You can uninstall packages that were installed using ``sqlite-utils install`` with ``sqlite-utils uninstall <package>``::
+
+    $ sqlite-utils uninstall beautifulsoup4
+
+Use ``-y`` to skip the request for confirmation.

sqlite_utils/cli.py

@@ -4,6 +4,7 @@ from click_default_group import DefaultGroup  # type: ignore
 from datetime import datetime
 import hashlib
 import pathlib
+from runpy import run_module
 import sqlite_utils
 from sqlite_utils.db import AlterError, BadMultiValues, DescIndex, NoTable
 from sqlite_utils.utils import maximize_csv_field_size_limit
@@ -2657,6 +2658,30 @@ def _analyze(db, tables, columns, save):
         click.echo(details)
 
 
+@cli.command()
+@click.argument("packages", nargs=-1, required=True)
+@click.option(
+    "-U", "--upgrade", is_flag=True, help="Upgrade packages to latest version"
+)
+def install(packages, upgrade):
+    """Install packages from PyPI into the same environment as sqlite-utils"""
+    args = ["pip", "install"]
+    if upgrade:
+        args += ["--upgrade"]
+    args += list(packages)
+    sys.argv = args
+    run_module("pip", run_name="__main__")
+
+
+@cli.command()
+@click.argument("packages", nargs=-1, required=True)
+@click.option("-y", "--yes", is_flag=True, help="Don't ask for confirmation")
+def uninstall(packages, yes):
+    """Uninstall Python packages from the sqlite-utils environment"""
+    sys.argv = ["pip", "uninstall"] + list(packages) + (["-y"] if yes else [])
+    run_module("pip", run_name="__main__")
+
+
 def _generate_convert_help():
     help = textwrap.dedent(
         """