snapcraft fails when two parts have the same file in the stage keyword

[Leo Arias]

When two parts have the same stage entry, like this:

parts:
  part1:
    # See 'snapcraft plugins'
    plugin: dump
    stage: [test]
  part2:
    plugin: dump
    stage: [test]

Running snapcraft will fail in the stage step like this:

Preparing to pull part2
Pulling part2
Preparing to pull part1
Pulling part1
Preparing to build part2
Building part2
Preparing to build part1
Building part1
[Errno 2] No such file or directory: '/root/parts/part1/install/test'

The problem is that in lifecycle.py we have this:

for step in common.COMMAND_ORDER[0:step_index]:
    if step == 'stage':
        pluginhandler.check_for_collisions(self.config.all_parts)

It means that it will check for collisions even on parts that haven't been staged.

[Kyle Fazzari (kyrofa)]

But you seem to be getting those errors in the build step, not the stage step...