Macos – Executing command via ssh not sourcing ~/.bashrc in Bash 4

In this particular instance, the answer appears (unfortunately) to be an instance of buggy software (or a bug very similar to that linked one).

If you control bash on that machine, you may be able to fix it by recompiling bash with #define SSH_SOURCE_BASHRC; However it's not the case for me, so I'm stuck seeking other options.

Hopefully that helps someone.

From bash man page:

Bash attempts to determine when it is being run with its standard input
connected to a a network  con‐nection,  as  if  by  the remote shell daemon,
usually rshd, or the secure shell daemon sshd.  If bash
determines it is being run in this fashion, it reads and executes commands
from  ~/.bashrc,  if  that file  exists and is readable.

I.e. ~/.bashrc will get run when you invoke it via ssh, regardless of whether you have a tty or not.

If you only want your .bashrc to run when you are interactive, try this at the top:

# If not running interactively, don't do anything
[[ "$-" != *i* ]] && return

If that doesn't work, try this:

[ -z "$PS1" ] && return