preserve directives, optional push root level scalar to own line

You need to set YAML().scalar_after_indicator = False to get a single scalar document
starting on its own line (instead of after the directives end indicator: --- abc")

fixes issue #304

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1 files changed, 4 insertions, 0 deletions

diff --git a/emitter.py b/emitter.py
index 14277fc..7cdebcd 100644
--- a/emitter.py
+++ b/emitter.py
@@ -204,6 +204,8 @@ class Emitter(object):
         self.analysis = None  # type: Any
         self.style = None  # type: Any
 
+        self.scalar_after_indicator = True  # write a scalar on the same line as `---`
+
     @property
     def stream(self):
         # type: () -> Any
@@ -408,6 +410,8 @@ class Emitter(object):
                 and self.sequence_context
             ):
                 self.sequence_context = False
+            if root and isinstance(self.event, ScalarEvent) and not self.scalar_after_indicator:
+                self.write_indent()
             self.process_tag()
             if isinstance(self.event, ScalarEvent):
                 # nprint('@', self.indention, self.no_newline, self.column)