diff options
| author | Markus Armbruster <armbru@redhat.com> | 2019-10-18 09:43:41 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2019-10-22 09:26:12 +0200 |
| commit | 0002b557b5c8b013087fc18d75d370f11783f619 (patch) | |
| tree | 90dd293aa8eaac937efba93625f0db5d8d9a6356 /scripts/qapi/common.py | |
| parent | 2a7bbedd7752b77d91eb2db0e8dea23852ce556b (diff) | |
qapi: Eliminate accidental global frontend state
The frontend can't be run more than once due to its global state.
A future commit will want to do that.
The only global frontend state remaining is accidental:
QAPISchemaParser.__init__()'s parameter previously_included=[].
Python evaluates the default once, at definition time. Any
modifications to it are visible in subsequent calls. Well-known
Python trap. Change the default to None and replace it by the real
default in the function body. Use the opportunity to convert
previously_included to a set.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20191018074345.24034-4-armbru@redhat.com>
Diffstat (limited to 'scripts/qapi/common.py')
| -rw-r--r-- | scripts/qapi/common.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py index 5abab44302..9d5c05f6a1 100644 --- a/scripts/qapi/common.py +++ b/scripts/qapi/common.py @@ -391,8 +391,9 @@ class QAPIDoc(object): class QAPISchemaParser(object): - def __init__(self, fname, previously_included=[], incl_info=None): - previously_included.append(os.path.abspath(fname)) + def __init__(self, fname, previously_included=None, incl_info=None): + previously_included = previously_included or set() + previously_included.add(os.path.abspath(fname)) try: if sys.version_info[0] >= 3: |