The local-exec push strategy was assuming it was running from a CLI and
so it wouldn't be a big deal for it to straight up `exec` and replace
its running with the user command. That command will just do its thing
and we want the exit code for the CLI command to match anyways, right?
Sure that works for a shell, but in a GRPC server setting it's decidedly
Not Cool to suddenly swap out the running process!
As you can imagine - the effect of doing this was all sorts of broken
pipes and unexpected EOFs and a very confused @phinze.
Luckily we had a subprocess strategy sitting right there for Windows
compat, so it was just a matter of switching to that in the server
context as well. Long and winding debugging process; simple fix;
just another classic!
This is just a convenience enhancement - rather than swallowing all the
output from the Heroku push command, print stdout and stderr like we do
elsewhere with subprocesses. Heoku pushes are pretty involved and dump
lots of useful output, so it should be useful for users to see this.
When testing all of the push functionality I ran into the fact that the
FTP upload code did not recognize that I had VAGRANT_CWD set, so it
wasn't finding the right files to upload.
This should make everything work properly relative to that location.
When the configured directory for FTP push has too many files, it will
generate an exception and fail due to a stack overflow. When this happens
just rescue out the exception and re-raise a custom error to provide
some context to the user on the actual problem.
Overcomes exception Net::SFTP::StatusException (2, "no such file") when using: "vagrant push" via sftp and a file parent directory does not exist. Function "upload" does not create the directory before uploading a file ('mkdir: true' seems to have no effect as zero directories are created while files are uploaded normally).
