revset: don't abort when regex to tag() matches nothing (issue3850)
This makes the tag("re:...") revset consistent with branch("re:...").
# debugshell extension
"""a python shell with repo, changelog & manifest objects"""
import mercurial
import code
def debugshell(ui, repo, **opts):
objects = {
'mercurial': mercurial,
'repo': repo,
'cl': repo.changelog,
'mf': repo.manifest,
}
bannermsg = "loaded repo : %s\n" \
"using source: %s" % (repo.root,
mercurial.__path__[0])
code.interact(bannermsg, local=objects)
cmdtable = {
"debugshell|dbsh": (debugshell, [])
}