GOPATH Mapping so you can build outside of the GOPATH

MacOS has no builtin bind mounting capabilities so a FUSE + bindfs must be used.

• Fuse for MacOS: https://osxfuse.github.io/
• bindfs: https://bindfs.org/

Linux can also use the bindfs FUSE filesystem. Most likely these packages are available for your distro already and installation should be straight forward.

On Linux the mount command can be used to perform the bind mounting. This however may require root privileges in order to execute mountso FUSE should be preferred.

>>> source functions.bash
>>> gpm . github.com/hashicorp/consul make

# You can use aliases too
>>> alias gpm_consul='_gpm_aliasable github.com/hashicorp/consul'
>>> gpm_consul . make

bindutil.py gpm . github.com/hashicorp/consul make

The binduitl.py gpm subcommand will do a few things:

1. Create a temporary directory to store a per-command GOPATH.
2. Bind mount the desired directory into the per-command GOPATH at <per-command GOPATH>/src/<package>
3. Execute the command with the working directory set to the package within the new GOPATH. It also modifies the GOPATH environment variable to add the per-command GOPATH at the front of the list of directories.
4. Unmount the bind mount.
5. Remove the temporary directory and all its contents