Detect default branch name in refresh-repository.php

[swissspidy]

Feature Request

• Yes, I reviewed the contribution guidelines.

Describe your use case and the problem you are facing

Some commands still use a master branch while some use main

refresh-repository.php has master hardcoded though:

wp-cli-dev/.maintenance/refresh-repository.php

Lines 12 to 13 in c040d8e

	printf( "Switching to latest \033[33mmaster\033[0m branch...\n" );
	system( "git --git-dir={$path}/.git --work-tree={$path} checkout master" );

Describe the solution you'd like

Detect which branch is the default and use that instead of hardcoded master.

Locally I use a command like git checkout $(git symbolic-ref refs/remotes/origin/HEAD | sed 's@^refs/remotes/origin/@@') to achieve this.

[wojsmol]

This can be also retrieved using curl -s https://api.github.com/repos/wp-cli/{$repository} | jq --raw-output .default_branch if jq dependency is acceptable.

[danielbachhuber]

@wp-cli/committers Should we change the default branch on all repositories to trunk, which would resolve this problem?

[wojsmol]

@danielbachhuber Change of default branch to main is in progress - see wp-cli/wp-cli#5598

[danielbachhuber]

@swissspidy Detecting the default branch seems like a good enhancement while we wait for wp-cli/wp-cli#5598 to be completed.

[danielbachhuber]

This should no longer be necessary as of wp-cli/wp-cli#5598 (comment)