0.12 environment upgrade gives cryptic error message with postgresql

[chmullig@…]

Upgrading several installs to 0.12 and running into some UI weirdness. If you attempt to run trac-admin /path/to/env upgrade on a env using postgresql you get the unhelpful, unfriendly message:

OSError: [Errno 2] No such file or directory

Turns out that's because it's trying to create a backup, which it can't do with postgresql. All you need to do is add --no-backup to the command and it works fine. I seem to recall in the past there was a more useful error message there. Any chance it can be returned?

[Remy Blank]

One change in 0.12 is that now it can create a backup with both PostgreSQL and MySQL. However, to do that, it needs the path to the pg_dump or mysqldump executables, respectively.

In your case, that means setting the [trac] pg_dump_path configuration option to the path to the pg_dump executable, or using the --no-backup option.

A more user-friendly error message would definitely help there.

[easteregg@…]

thanks, i was using a 0.11 installation with mysql on a debian system and got the same error, while upgrading the enviroment for trac 0.12! than, with —no-backup → problem solved! thank you and a slap on your fingers, trac-coders! :P

[Remy Blank]

Fixed in [9986] and [9987].