Moving from master to main branch name convention across all Public Lab projects

[jywarren]

Hi, all! We've been in the midst of a years-long series of migrations from using a branch called master as default to main, and although we've succeeded for many of our repositories (https://github.com/publiclab/mapknitter/, https://github.com/publiclab/spectral-workbench/, for example, full list at bottom), we haven't done the plots2 repo yet. This is important because of the racist connotations of the term master.

One complicating issue that's slowed us in the past is that it requires re-assigning all PRs to the new default branch. But there is now (recently) a feature for this in GitHub:

Let's start this process -- I've just reassigned the default to main and we should be able to re-assign all PRs accordingly. We're planning to begin this next week.

Thanks, all!

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UPDATING LOCAL CLONES

(via this link, thanks!)

If someone has a local clone, then can update their locals like this:

$ git checkout master
$ git branch -m master main
$ git fetch
$ git branch --unset-upstream
$ git branch -u origin/main
$ git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/main

The above steps accomplish:

1. Go to the master branch
2. Rename master to main locally
3. Get the latest commits from the server
4. Remove the link to origin/master
5. Add a link to origin/main
6. Update the default branch to be origin/main

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Note: dependabot auto-repoints its own PRs, actually, and if main and master are synced, no Travis re-runs are needed.

Note: protected branches need reconfig each time!

---

This is done for several, including:

• https://github.com/publiclab/mapknitter
• https://github.com/publiclab/image-sequencer
• https://github.com/publiclab/image-sequencer-app
• https://github.com/publiclab/inline-markdown-editor
• https://github.com/publiclab/pi-builder
• https://github.com/publiclab/colorimetry
• https://github.com/publiclab/leaflet-multispectral
• https://github.com/publiclab/leaflet-tile-filter
• https://github.com/publiclab/matcher-core
• https://github.com/publiclab/matcher-cli
• https://github.com/publiclab/unearthing-pvd
• https://github.com/publiclab/community-microscope
• https://github.com/publiclab/papercraft-spectrometer
• https://github.com/publiclab/lego-spectrometer
• https://github.com/publiclab/simple-data-grapher
• https://github.com/publiclab/infragram
• https://github.com/publiclab/spectral-workbench
• https://github.com/publiclab/spectral-workbench.js
• https://github.com/publiclab/leaflet-blurred-location
• https://github.com/publiclab/leaflet-blurred-location-display
• https://github.com/publiclab/blurred-location
• https://github.com/publiclab/Leaflet.DistortableImage
• https://github.com/publiclab/webjack
• https://github.com/publiclab/webjack-firmata
• https://github.com/publiclab/plotsbot
• https://github.com/publiclab/community-toolbox
• https://github.com/publiclab/leaflet-environmental-layers/
• Move all PRs to main branch instead of master PublicLab.Editor#535 (see for example issue to open on each)

[jywarren]

Great! Done - now just repointing PRs!

[jywarren]

All PRs repointed! We're done! I'll leave this open for a while with the local clone repointing info... and in case anything goes wrong!

[jywarren]

Found and fixed many instances of master in the code itself, resolved in #8096

[jywarren]

Also noting something I almost forgot - CodeClimate needs to be repointed as well, as do many 3rd party services!