i18n-ja: synchronized with
8594d0b3018e
hg: explicitly check that peer lookup object has instance() if call failed
If a "thing" is callable but raises TypeError for some reason, a callable
object would be returned. Thereafter, unfriendly traceback would be displayed:
Traceback (most recent call last):
...
File "mercurial/hg.pyc", line 119, in _peerorrepo
obj = _peerlookup(path).instance(ui, path, create)
AttributeError: 'function' object has no attribute 'instance'
Instead, we should show the reason why "thing(path)" didn't work:
Traceback (most recent call last):
...
File "hggit/__init__.py", line 89, in _local
p = urlcls(path).localpath()
TypeError: 'NoneType' object is not callable
If a "thing" is not callable, it must be a module or an object that implements
instance(). If that module didn't have instance(), the error message would be
"<unloaded module 'foo'> object is not callable". It doesn't make perfect sense,
but it isn't so bad as it can blame which module went wrong.
extensions: show traceback on load failure if --traceback flag is set
Before this patch, there was no handy way to investigate the reason why
extension couldn't be loaded.
If ui.debug is set, tracebacks of both "hgext.foo" and "foo" are displayed
because the first ImportError could occur at very deep dependency module.