Extract build_package step

Author: michaeljoseph

changes/packaging.py

@@ -9,11 +9,21 @@
 log = logging.getLogger(__name__)
 
 
-def install_package(context):
-    """Attempts to install the sdist and wheel."""
+def build_package(context):
+    """Builds package distributions"""
     build_package_command = 'python setup.py clean sdist bdist_wheel'
     result = shell.dry_run(build_package_command, context.dry_run)
-    if not context.dry_run and result:
+    packages = ', '.join(path('dist').files()) if not context.dry_run else "nothing"
+
+    if not result:
+        raise Exception('Error building packages: %s' % result)
+    else:
+        log.info('Built %s' % packages)
+
+
+def install_package(context):
+    """Attempts to install the sdist and wheel."""
+    if not context.dry_run and build_package(context):
         with util.mktmpdir() as tmp_dir:
             venv.create_venv(tmp_dir=tmp_dir)
             for distribution in path('dist').files():
@@ -30,7 +40,8 @@ def install_package(context):
 
 
 def upload_package(context):
-    """Uploads your project with setup.py clean sdist bdist_wheel upload."""
+    """Uploads your project packages to pypi with twine."""
+    result = build_package(context)
 
     upload_args = 'python setup.py clean sdist upload'
     if context.pypi: