def main(prev_dependency=None):
"""Wrapper around cli(), providing exception handling for dependency
errors. When a dependency is missing, this will try to resolve that
dependency and then retry running cli(). When retrying, the
`prev_dependency` parameter indirectly tells us if we've progressed, due
to the dependency changing"""
try:
cli()
except dependency.Missing, e:
resolvers = [resolver(e.dependency)
for resolver in DependencyResolver.__subclasses__()]
resolvers = [r for r in resolvers if r.has_resolution()]
if e.dependency == prev_dependency or len(resolvers) != 1:
raise e
else:
click.echo("Attempting to resolve dependency: " + e.dependency)
resolvers[0].resolution()
main(e.dependency)
def run_or_resolve(cmd, prev_dependency=None):
"""Wrapper around a click command or group, providing exception handling for
dependency errors. When a dependency is missing, this will try to resolve
that dependency and then retry running cli(). When retrying, the
`prev_dependency` parameter indirectly tells us if we've progressed, due
to the dependency changing"""
try:
cmd()
except dependency.Missing as e:
resolvers = [resolver(e.dependency)
for resolver in DependencyResolver.__subclasses__()]
resolvers = [r for r in resolvers if r.has_resolution()]
if e.dependency == prev_dependency or len(resolvers) != 1:
raise e
else:
logger.info("Attempting to resolve dependency: %s", e.dependency)
resolvers[0].resolution()
run_or_resolve(cmd, e.dependency)
except pyparsing.ParseException as exc:
logger.error(u"%s:\n'%s'", exc, exc.line)
raise
