def test_md_historydict(RE, hw):
try:
import historydict
except ImportError as ie:
pytest.skip('Skipping test because historydict cannot be imported. '
'Error was {}'.format(ie))
_md(historydict.HistoryDict(':memory:'), RE, hw)
def get_history():
"""
Return a dict-like object for stashing metadata.
If historydict is not installed, return a dict.
If historydict is installed, look for a sqlite file in:
- $BLUESKY_HISTORY_PATH, if defined
- ~/.config/bluesky/bluesky_history.db
- /etc/bluesky/bluesky_history.db
If no existing file is found, create a new sqlite file in:
- $BLUESKY_HISTORY_PATH, if defined
- ~/.config/bluesky/bluesky_history.db, otherwise
"""
try:
import historydict
except ImportError:
print("You do not have historydict installed, your metadata "
"will not be persistent or have any history of the "
"values.")
return dict()
else:
for path in SEARCH_PATH:
if os.path.isfile(path):
print("Loading metadata history from %s" % path)
return historydict.HistoryDict(path)
# No existing file was found. Try creating one.
path = SEARCH_PATH[0]
try:
os.makedirs(os.path.dirname(path), exist_ok=True)
print("Storing metadata history in a new file at %s." % path)
return historydict.HistoryDict(path)
except IOError as exc:
print(exc)
print("Failed to create metadata history file at %s" % path)
print("Storing HistoryDict in memory; it will not persist "
"when session is ended.")
return historydict.HistoryDict(':memory:')
