fetch gh-pages branch using github token

[leoholz]

This patch introduces the function git.fetch analogue to git.pull which uses the github token (if present) to authenticate the git fetch request. This enables using github-action-benchmark with private repositories (see #19).

[almartin82]

@leoholz extremely useful PR!
I tried to use your fork on a private python repo as follows:

      - name: Store benchmark result
        uses: leoholz/github-action-benchmark@fix/private-repos

It fails as follows - any insight? not super confident that @fix/private-repos (vs @v1) is the proper way to reference your patch...

 Store benchmark result0s
    pythonLocation: /opt/hostedtoolcache/Python/3.7.8/x64
Run leoholz/github-action-benchmark@fix/private-repos
  with:
    name: Python Benchmark with pytest-benchmark
    tool: pytest
    output-file-path: benchmark_output.json
    fail-on-alert: true
    github-token: ***
    comment-on-alert: true
    gh-pages-branch: gh-pages
    benchmark-data-dir-path: dev/bench
    auto-push: false
    skip-fetch-gh-pages: false
    comment-always: false
    save-data-file: true
    alert-threshold: 200%
  env:
    PYTHON: 3.7
    pythonLocation: /opt/hostedtoolcache/Python/3.7.8/x64
##[error]File not found: '/home/runner/work/_actions/leoholz/github-action-benchmark/fix/private-repos/src/index.js'

Thanks!

[leoholz]

Hi @almartin82 ! Please try uses: leoholz/github-action-benchmark@v1, this at least works in my setup.

[bitbacchus]

Works beautifully for me, thanks! Hope this will be pulled soon.

[aseure]

Any update on this one?

[ktrz]

hi @leoholz
Thank you for your contribution. I took over the maintenance of this repo and I'm getting up to speed on all the issues and PRs.

Could you please update your PR to the latest master so that I can verify this again before merging?