obscache: ignore permission and OS errors when writing
In practice we always update this cache along side a new transaction, with lock
taken so permission issues should not happens. However, staying on the safe side
is better. Errors during Cache update should not block Mercurial operations.
import hghave
@hghave.check("docgraph-ext", "Extension to generate graph from repository")
def docgraph():
try:
import hgext.docgraph
hgext.docgraph.cmdtable # trigger import
except ImportError:
try:
import hgext3rd.docgraph
hgext3rd.docgraph.cmdtable # trigger import
except ImportError:
return False
return True