bundle2: add an 'error' capability
This capability will be extended as new error type is introduced.
hgewb: disable progress when serving (
issue4582)
Before this patch, progress bar could be displayed when serving, creating
hypothetical problems.
test-ssh: stablize for platform-specific shell quoting
Windows and OpenVMS use double quotes instead of single.
push: catch and process PushkeyFailed error
We add a way to register "pushkey failure callback" that will be used if the
push is aborted by a pushkey failure. A part generator adding mandatory pushkey
parts should register a failure callback for all of them. The callback will be
in charge of generating a meaningful abort if this part fails.
If no callback is registered, the error is propagated.
Catch PushkeyFailed error in exchange.
bundle2: introduce a PushkeyFail error to abort unbundle on pushkey error
The pushkey code is generic and the server side has little context on what the
client is trying to achieve. Generating interesting error messages server side
would be challenging. Instead we introduce a dedicated exception that carries more
data. In particular, it carries the id of the part which failed that will allow
clients to display custom error messages depending on the part intent.
The processing and transfer-over-the-wire of this exception is to be implemented
in coming changesets.