Summary

Always run svn log --xml non-interactively

Review Request #7205 — Created April 14, 2015 and submitted April 15, 2015, 11:59 a.m.

Information

Owner

brennie

Repository

RBTools

Branch

release-0.7.x

Bugs

Depends On

~~7204~~

Commit

dd20b9d...

Reviewers

Groups

rbtools

People

Description

We cannot run svn log --xml interactively because the authentication
prompts are intermixed with the svn log output. This results in
exceptions when attempting to parse the XML and leads to cryptic error
messages.

This patch replaces all svn log --xml usage with non-interactive usage
and checks for a specific error code to determine if there was an
authentication error. Authentication errors are written to the console
with directions on how to rectify them using the SVN authenticaiton
command line options.

Testing Done

Ran unit tests.

Ran rbt diff in an SVN repository with specific revisions with a
remote repository over HTTP with authentication. RBTools exited with
an error that prompted me to enter my SVN credentials on the
command-line.

Issues

Description	From	Last Updated
We cannot run svn log interactively...	gmyers	April 15, 2015, 11:06 a.m.
Should this also mention the forthcoming --svn-prompt-password option as an alternative to --svn-password?	gmyers	April 15, 2015, 11:07 a.m.

Tool: PEP8 Style Checker
Processed Files:
    rbtools/clients/svn.py
    rbtools/clients/errors.py



Tool: Pyflakes
Processed Files:
    rbtools/clients/svn.py
    rbtools/clients/errors.py

Would there be any value in running all svn commands with the --non-interactive option? I think the --svn-password and --svn-prompt-password options provided by rbt eliminate any real need to run in an interactive fashion, and as svn log --xml has shown running in interactive mode can lead to problems.

Along these lines, if this change was made then you might want to evaluate all svn commands for the E215004 error, which could possibly be more trouble than it is worth. As it stands now, I think the call to svn log --xml will always be called first in any scenario where svn needs to access the remote server, and thus authentication issues always get checked and the user informed. But, in the future if there was a new svn command requiring remote access added prior to the svn log --xml call then there could be authentication errors that are not explicitly obvious.

brennie April 15, 2015, 11:02 a.m.

The issue with running all svn commands this way is that this requires separating the error stream from the output stream. In all other cases, the output and error streams are returned interwoven so that it looks natural when printed. Lots machinery depends on this behaviour. I think we should limit the --non-interactive option to commands that can hit the network.

rbtools/clients/svn.py (Diff revision 1)
The issue has been resolved. Show all issues
```
We cannot run svn log interactively...
```

rbtools/clients/svn.py (Diff revision 1)

The issue has been resolved. Show all issues

Should this also mention the forthcoming --svn-prompt-password option as an alternative to --svn-password?

brennie April 15, 2015, 11:05 a.m.

This was written ebfore the --svn-prompt-password option. I'll update this.

Commit:

dd20b9d5603fd1d865c41afafe3dda3862c931a7

Diff:

Revision 2 (+43 -4)

Show changes

	rbtools/clients/errors.py
	rbtools/clients/svn.py

Tool: Pyflakes
Processed Files:
    rbtools/clients/svn.py
    rbtools/clients/errors.py



Tool: PEP8 Style Checker
Processed Files:
    rbtools/clients/svn.py
    rbtools/clients/errors.py

Ship it!

```
Ship It!
```

Status:: Completed
Change Summary:: Pushed to release-0.7.x (e7df277)