postgresql: fix encoding of pgctl path

[jd]

This should be a regular string and not bytes. Otherwise in case of error
(pg_ctl not found), this happens:
ERROR [pifpaf] sequence item 0: expected str instance, bytes found

Closes #118

[progval]

errors with:

ERROR [pifpaf] Can't mix strings and bytes in path components

[ardumont]

Hello,

That fixes it for me indeed:

$ pifpaf run postgresql -- pytest
WARNING [pifpaf.drivers] `psutil.Popen(pid=10779, status='terminated')` is already gone, sending SIGKILL to its process group
ERROR [pifpaf] Unable to run command `/usr/lib/postgresql/10/bin/pg_ctl -o '-A trust' initdb': [Errno 2] No such file or directory: '/usr/lib/postgresql/10/bin/pg_ctl': '/usr/lib/postgresql/10/bin/pg_ctl'

Thanks both for investigating/fixing this.

---

@progval Didn't you forget to remove the b"pg_ctl"?

I reproduce your error if i miss that ;)

$ pifpaf run postgresql -- pytest
WARNING [pifpaf.drivers] `psutil.Popen(pid=10525, status='terminated')` is already gone, sending SIGKILL to its process group
ERROR [pifpaf] Can't mix strings and bytes in path components

Note:

• system: debian testing
• pifpaf installed in a venv (2.2.1) then patched with this.

Cheers,

[progval]

@progval Didn't you forget to remove the b"pg_ctl"?

I did, sorry.