build: git remote authentication secrets

[jcgruenhage]

Description

I fixed the documentation, because it was wrong. See the issues and buildkit PR for details.

Related issues or tickets

• BuildKit issue: Git authentication secrets documentation issue moby/buildkit#5703
• Docs issue: GIT_AUTH_TOKEN cannot be used with GitLab CI_JOB_TOKEN #22834
• Another BuildKit issue: ADD instruction fails to populate private submodule inside private repo even with valid GIT_AUTH_TOKEN moby/buildkit#6046
• PR that introduced the behaviour: git: support for token authentication moby/buildkit#1533
• PR that introduced the docs: build: git remote authentication secrets #19739

Reviews

• Technical review
• Editorial review
• Product review

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[github-actions]

Thanks for the PR. We'd like to make our product docs better, but haven't been able to review all the suggestions. As our docs change often and quickly diverge, we do not have the bandwidth to review and rebase old PRs.

If the updates are still relevant, please add a comment and review our contribution guidelines to rebase your PR against the latest version of the docs. This helps our maintainers focus on active contributions. If there's no activity, this PR will be closed in 30 days.

To remove the stale label: Comment /lifecycle active
To freeze (requires write access): Comment /lifecycle frozen

[dvdksn]

Thanks!

I think we can soften the language on "GitHub-specific" vs "any provider", otherwise LGTM

[dvdksn]

LGTM

[dvdksn]

/review

[jcgruenhage]

Thanks for the review @dvdksn!