systemd: specify repo path, to avoid unnecessary subdirectory

[RubenKelevra]

Reational

Currently, the service files will create a hidden directory '/var/lib/ipfs/.ipfs/' which is not necessary for a system-user installation since it won't store any additional files - like in a regular user directory.

This change will set the directory to '/var/lib/ipfs/' to avoid this.

[Stebalien]

That's reasonable, but I'm pretty sure ~ isn't valid. You probably need "${HOME}".

[RubenKelevra]

Well, ~ works fine for the service as well as in a shell. 🤔

I've tested it before I made the PR.

I thought IPFS makes the expansion, but it works without. The environment variable gets expanded by the system:

$ export IPFS_PATH=~
$ echo $IPFS_PATH
/home/ruben
$ /usr/bin/ipfs init
initializing IPFS node at /home/ruben
generating 2048-bit RSA keypair...done
peer identity: QmX35MVTjvJ3BxPABcphzsJJcPwUkKVL96icYP23mHgqWY
to get started, enter:

	ipfs cat /ipfs/QmQPeNsJPyVWPFDVHb77w8G42Fvo15z4bG2X8D2GhfbSXc/readme

[Stebalien]

Ah, you're right. go-ipfs does expand it (although I have no idea why). However, please use $HOME instead of relying on this. This is going to be very confusing for anyone reading the unit file.

[RubenKelevra]

@Stebalien please rereview :)

[Stebalien]

Thanks!