plugin-update --all fails if git-ref is not master #799
Description
Describe the bug
asdf plugin update --all fails if one or more plugins don't use master as their default branch.
To Reproduce
asdf plugin install jbangasdf plugin update --all
Expected behavior
# asdf plugin update --all
Updating java...
Already on 'master'
Your branch is up to date with 'origin/master'.
Updating jbang...
Already on 'main'
Your branch is up to date with 'origin/main'.
asdf should use the default branch of the plugin repository for updates or alternatively only pull the latest changes of the checked out branch even if it's not master.
Actual behavior
# asdf plugin update --all
Updating java...
Already on 'master'
Your branch is up to date with 'origin/master'.
Updating jbang...
fatal: couldn't find remote ref master
When explicitly specifying main as git-ref parameter to asdf plugin update <name> [<git-ref>], the update is successful:
# asdf plugin update jbang main
Updating jbang...
Already on 'main'
Your branch is up to date with 'origin/main'.
Environment
OS:
Darwin joschi-mbp15.lan 19.6.0 Darwin Kernel Version 19.6.0: Thu Jun 18 20:49:00 PDT 2020; root:xnu-6153.141.1~1/RELEASE_X86_64 x86_64 i386 MacBookPro11,3 Darwin
SHELL:
GNU bash, version 5.0.18(1)-release (x86_64-apple-darwin19.5.0)
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
ASDF VERSION:
v0.8.0
ASDF ENVIRONMENT VARIABLES:
ASDF_DIR=/usr/local/opt/asdf
ASDF INSTALLED PLUGINS:
java https://github.com/halcyon/asdf-java.git
jbang https://github.com/joschi/asdf-jbang.git
asdf plugins affected (if relevant):
Additional context
GitHub will start using main as default branch name starting October 1, 2020:
On October 1, 2020, if you haven't changed the default branch for new repositories for your user, organization, or enterprise, it will automatically change from master to main.
Source: https://github.blog/changelog/2020-08-26-set-the-default-branch-for-newly-created-repositories/