song plugin support argument

patacrep/content/__init__.py

@@ -68,7 +68,7 @@ import sys
 import jinja2
 import yaml
 
-from patacrep import files, Rx, utils
+from patacrep import files, Rx
 from patacrep.errors import SBFileError, SharedError
 
 LOGGER = logging.getLogger(__name__)
@@ -266,7 +266,7 @@ def process_content(content, config=None):
         content = [{'song': None}]
     for elem in content:
         if isinstance(elem, str):
-            elem = {'song': [elem]}
+            elem = {'song': elem}
         if isinstance(elem, dict):
             for keyword, argument in elem.items():
                 if keyword not in plugins:

patacrep/content/song.py

@@ -78,6 +78,8 @@ def parse(keyword, argument, config):
     Return a list of Song() instances.
     """
     contentlist = argument
+    if isinstance(contentlist, str):
+        contentlist = [contentlist]
     plugins = config['_song_plugins']
     if '_langs' not in config:
         config['_langs'] = set()

test/test_content/songs.source

@@ -1 +1,7 @@
-["exsong.sg", "intersong.is", "jsonlist.json", "texfile.tex", "texsong.tsg", "chordpro.csg", "subdir/chordpro.csg"]
+- exsong.sg
+- intersong.is
+- jsonlist.json
+- texfile.tex
+- texsong.tsg
+- song: chordpro.csg
+- subdir/chordpro.csg