build.xml ant deploy calls undeploy, which wipes the org

[ak77]

The "deploy" target defined in build.xml depends on "undeploy". Looking at undeploy.xml, it generates a destructiveChanges.xml file that effectively purges all custom components from the org. This happens without prompting. Is this intended behaviour?

In our case, it happened against a relatively fresh sandbox, but if that happened against a mature sandbox (or against production), it could cause some serious headaches for users, especially if their backups aren't up to date.

[afawcett]

These files are really to support the CI into Travis and are not intended to be used for this purpose. To avoid this confusion i guess a big note in the Ant file would be a good idea. 👍

[afawcett]

Flagg this as doc for now, but likely be closed once we move to SFDX format soon.

[afawcett]

See #259