Tools like SCMBug can add comments to a bug after a commit. However, if that commit triggers a build in Hudson, there is currently no way for Hudson to automatically update the bug after the build is done.

There should be a Post-build Action called "Bugzilla Notification." Since you can only define one Bugzilla instance globally, you would define conditional bug updates globally. The Post-build Action would consist of a single checkbox, and checking it would cause Hudson process the conditions and run the updates for each applicable bug.

The following changes could be made to bugs (as a single transaction).

• Add comment: [___]
• Update field [___v]...
  • (dropdown field) Change to: [___v]
  • (freeform field) Replace with: [___]
  • (freeform field) Append: [___]

You'd want macros available for revision number, bug number, build status, and all that.

By default, the bug changes would always take place. However, there could be optional conditions.

• Build result is: [___v]
• Build parameter [___v] is: [___]
• Bug status is: [___v]
• SCM commit message...
  • contains text: [___]
  • matches regex: [___]

Since there are multiple conditions, we might also want the option to add multiple separate actions. This way, you can say "take action 1 if these conditions are true, but take action 2 if these other conditions are true..."

I realize this is very ambitious, but it would be really helpful!