Add the --show-git-push-stderr flag

Related #26

CHANGELOG.rst

@@ -1,6 +1,14 @@
 Changes
 =======
 
+0.1.4 (unreleased)
+------------------
+
+* Add the ``--show-git-push-stderr`` option to make deploy more verbose,
+  this can help debug problems, but is potentially dangerous, hence the output
+  of ``git push`` is hidden by default.
+
+
 0.1.3
 -----
 

elsa/_cli.py

@@ -111,8 +111,12 @@ def freeze(path, base_url, serve, port, cname):
     @click.option('--freeze/--no-freeze', default=True,
                   help='Whether to freeze the site before deploying, '
                   'default is to freeze')
+    @click.option('--show-git-push-stderr', is_flag=True,
+                  help='Show the stderr output of `git push` failure, '
+                       'might be dangerous if logs are public')
     @cname_option()
-    def deploy(path, base_url, remote, push, freeze, cname):
+    def deploy(path, base_url, remote, push, freeze,
+               show_git_push_stderr, cname):
         """Deploy the site to GitHub pages"""
         if push is None:
             warnings.simplefilter('always')
@@ -128,6 +132,6 @@ def deploy(path, base_url, remote, push, freeze, cname):
                 inject_cname(app)
             freeze_app(app, freezer, path, base_url)
 
-        deploy_(path, remote=remote, push=push)
+        deploy_(path, remote=remote, push=push, show_err=show_git_push_stderr)
 
     return command()

elsa/_deployment.py

@@ -35,7 +35,7 @@ def get_git_toplevel():
     return process.stdout.strip().decode('utf-8')
 
 
-def deploy(html_dir, *, remote, push):
+def deploy(html_dir, *, remote, push, show_err):
     """Deploy to GitHub pages, expects to be already frozen"""
     if os.environ.get('TRAVIS'):  # Travis CI
         print('Setting up git...')
@@ -66,11 +66,14 @@ def deploy(html_dir, *, remote, push):
         print('Pushing to GitHub...')
         try:
             run(['git', 'push', remote, 'gh-pages:gh-pages', '--force'],
-                quiet=True)
+                quiet=not show_err)
         except subprocess.CalledProcessError as e:
-            msg = ('Error: git push failed (exit status {}).\n'
-                   'Note: Due to security constraints, Elsa does not show the '
-                   'error message from git, as it may include sensitive '
-                   'information and this could be logged.')
+            msg = 'Error: git push failed (exit status {}).'
+            if not show_err:
+                msg += ('\nNote: Due to security constraints, Elsa does not '
+                        'show the error message from git, as it may include '
+                        'sensitive information and this could be logged. Use '
+                        'the --show-git-push-stderr switch to change this '
+                        'behavior.')
             print(msg.format(e.returncode), file=sys.stderr)
             sys.exit(e.returncode)

tests/test_commands.py

@@ -398,6 +398,21 @@ def test_remote_not_displayed_when_pushing_fails(elsa, gitrepo, capsys):
     assert url not in err
 
 
+def test_push_error_displayed_when_explicitly_asked_for(elsa, gitrepo, capsys):
+    url = 'https://example.com'
+    run_cmd(['git', 'remote', 'set-url', 'origin', url])
+
+    capsys.readouterr()  # flush
+
+    elsa.run('deploy', '--push', '--show-git-push-stderr', should_fail=True)
+    out, err = capsys.readouterr()
+
+    print('OUT', out)
+    print('ERR', err)
+    assert url in err
+    assert 'not found' in err
+
+
 def test_traceback_not_displayed_when_pushing_fails(elsa, gitrepo, capsys):
     run_cmd(['git', 'remote', 'set-url', 'origin', 'foo'])
     elsa.run('deploy', '--push', should_fail=True)