build: add release task

.gitignore

@@ -1,4 +1,5 @@
 *~
 *.pyc
 .coverage
+dist/
 docs/_build/

tasks.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8; -*-
+"""
+Tasks for WuttaMess
+"""
+
+import os
+import shutil
+
+from invoke import task
+
+
+@task
+def release(c, skip_tests=False):
+    """
+    Release a new version of WuttaMess
+    """
+    if not skip_tests:
+        c.run('pytest')
+
+    if os.path.exists('dist'):
+        shutil.rmtree('dist')
+
+    c.run('python -m build --sdist')
+    c.run('twine upload dist/*')