`bit` doesn't detect whether it was installed via package manager

[yermulnik]

Describe the bug bit doesn't detect whether it was installed via package manager (brew in this case) and running but update just silently overwrites the symlink in /usr/local/bin/

To Reproduce

1. Run bit update
2. Check whether /usr/local/bin/bit is still a symlink

Expected behavior bit detects it was installed via package manager (e.g. by checking some common location which is used by most package managers to keep track of packages installed by their means or e.g. by creating auxiliary file when installed manually) and declines to do a self-update with a self-exlanatory message with optional prompt to force the update and replacement of the already installed file.

Screenshots

11:58:58 [georgii_iermulnik@epuakyiw4608][j:0][~]> sudo bit update
Bit is supported through donations. Consider donating here: ❤ https://github.com/sponsors/chriswalz
Updated bit v0.8.0 to v0.9.1 in /usr/local/bin11:59:32 [georgii_iermulnik@epuakyiw4608][j:0][~]>

Desktop (please complete the following information):

• OS: macOS Catalina 10.15.6 x86_64
• Terminal: iTerm2 3.3.12
• Shell: GNU bash, version 5.0.18(1)-release (x86_64-apple-darwin19.5.0)

Additional context (Add any other context about the problem here) First reported in #63

[chriswalz]

@yermulnik This one was a bit hard to test but I added a symlink check. If bit is symlinked it will suggest brew upgrade

[chriswalz]

Please reopen if this doesn't work. Thanks for reporting it.

[yermulnik]

@chriswalz Thank you

This one was a bit hard to test

Yep, I do understand. Thanks for fixing for brew but I think there still will be an issue with other package managers where e.g. apt on Ubuntu and pkg on FreeBSD install bit into a PATH as binary but not as symlink.

[yermulnik]

I'll re-open this issue if I have an idea on how to add a check for this kind of package managers.