Do not require a save when editing Bibtex data

By default, click.edit returns None if the user did not save.  But in
our case, just checking the data without saving is a realistic scenario
that should be interpreted as a confirmation of the data.

1 files changed, 10 insertions, 7 deletions

diff --git a/bibtool/cli.py b/bibtool/cli.py
index 3056933..43d6c21 100644
--- a/bibtool/cli.py
+++ b/bibtool/cli.py
@@ -35,13 +35,16 @@ def _import(filename, directory, delete):
     click.echo('Found one Bibtex entry: ' + entry['ID'])
     if click.confirm('Do you want to edit the entry?'):
         edited_data = click.edit(bibtexparser.dumps(bibtex_data),
-                                 extension='.bib')
-        if edited_data:
-            bibtex_data = bibtexparser.loads(edited_data)
-            if len(bibtex_data.entries) != 1:
-                raise Exception('The edited data must contain exactly one'
-                                'Bibtex entry.')
-            entry = bibtex_data.entries[0]
+                                 extension='.bib', require_save=None)
+        if not edited_data:
+            click.echo('Empty Bibtex data. Aborting.')
+            return
+
+        bibtex_data = bibtexparser.loads(edited_data)
+        if len(bibtex_data.entries) != 1:
+            raise Exception('The edited data must contain exactly one '
+                            'Bibtex entry.')
+        entry = bibtex_data.entries[0]
 
     click.confirm('Add {} to the repository?'.format(entry['ID']),
                   default=True, abort=True)