I wholeheartedly agree with this blog post. I believe someone on here yesterday was asking about config file locations and setting them manually. This is in the same vein. I can’t tell you how many times a command line method for discovering the location of a config file would have saved me 30 minutes of googling.
Even then you shouldn’t be writing where the executable is. I don’t want spurious files where my scripts etc. are.
Just use XDG dirs.