[ARROW-18011] [Dev] Replace hard-coded string "master" with "main" in dev/archery/archery/crossbow/core.py after default branch migration

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Developer Tools
• External issue URL: https://github.com/apache/arrow/issues/33215
• Assignee: Unassigned
• Reporter: Kevin Gurney
• Created: 12/Oct/22 17:52
• Updated: 11/Jan/23 11:57

Description

https://github.com/apache/arrow/pull/14033 uses several heuristics to determine the default Git branch name for the upstream apache/arrow project. When the heuristics fail to detect the default branch name, the strategy used in https://github.com/apache/arrow/pull/14033 currently falls back to using the hard-coded branch name "master".

After https://github.com/apache/arrow/pull/14033 is merged and after the upstream apache/arrow GitHub repository migrates to using "main" as the default branch name, the hard-coded string "master" should be replaced with "main" inside of the implementation of the computed property "default_branch_name" of the "Repo" class in dev/archery/archery/crossbow/core.py.

A similar instance of hard-coded "master" is used in `dev/merge_arrow_pr.py` and it needs to be updated as well.