During the course of versioning software history, myriad names have been used as the default for the chief branch, including trunk, development, develop, dev, master, main, mainline, baseline, and sometimes even default.

Finding Oh My Zsh’s heuristic insufficient (Oh My Zsh decides the default branch is named main if that branch exists, otherwise they assume it’s master), I created this script to more quickly and more accurately ascertain this information.