Fix encoding issue in the init subcommand (fix #50).

sigal/__init__.py

@@ -49,15 +49,17 @@ from .settings import read_settings
 _DEFAULT_CONFIG_FILE = 'sigal.conf.py'
 
 
-def init():
+@arg('path', nargs='?', help='Path of the sample config file')
+def init(path):
     """Copy a sample config file in the current directory."""
 
     from pkg_resources import resource_string
+    path = path or 'sigal.conf.py'
     conf = resource_string(__name__, 'templates/sigal.conf.py')
 
-    with io.open('sigal.conf.py', 'w', 'utf-8') as f:
-        f.write(conf)
-    print("Sample config file created: sigal.conf.py")
+    with io.open(path, 'w', encoding='utf-8') as f:
+        f.write(conf.decode('utf8'))
+    print("Sample config file created: {}".format(path))
 
 
 @arg('source', nargs='?', help='Input directory')

tests/test_cli.py

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+
+import os
+from sigal import init
+
+
+def test_init(tmpdir):
+    config_file = str(tmpdir.join('sigal.conf.py'))
+    init(path=config_file)
+    assert os.path.isfile(config_file)