GitHub Action in this repo that updates simonw/datasette-plugin-template-demo

[simonw]

Would be cool if this repo updated its own demo.

[simonw]

This should happen on every push to main.

[simonw]

I have this working now in that it generates the correct set of files here:

Next step: push those files to the https://github.com/simonw/datasette-plugin-template-demo repo.

[simonw]

This is a bit tricky: I want to completely over-write the existing repo contents with the newly generated files, deleting any files that are missing and adding any new ones - all represented by a single commit.

The commit message should link back to the commit in this datasette-plugin repo that caused the changes.

[simonw]

I think git add -A . will handle the git side of things. So I need to checkout the repo, generate a clean demo with cookiecutter, then replace the checked out content with the files created by cookiecutter and run the commit.

[simonw]

I think rsync can do this: rsync -av --delete /from-path /to-path

[simonw]

Possibly easier: mv ~/old-version/.git ~/new-version - then run the checkin from the new version?

[simonw]

And to commit but only if it changed:

timestamp=$(date -u)
git commit -m "Latest data: ${timestamp}" || exit 0

[simonw]

I might need to do this to be able to push to the repo:

- name: Checkout private tools
  uses: actions/checkout@v2
  with:
    repository: my-org/my-private-tools
    token: ${{ secrets.GitHub_PAT }} # `GitHub_PAT` is a secret that contains your PAT
    path: my-tools

From https://github.com/actions/checkout#checkout-multiple-repos-private

[simonw]

Need permission to git push to that repo.

[simonw]

Using a personal access token like this should work:

git remote set-url origin https://simonw:<MYTOKEN>@github.com/simonw/datasette-plugin-template-demo.git

From https://stackoverflow.com/a/18936804

[simonw]

I created a token for this: https://github.com/settings/tokens/444691620 - with repo access, called "Push to simonw/datasette-plugin-template-demo"

[simonw]

Added that secret to this repo as PERSONAL_ACCESS_TOKEN_FOR_PUSH.

[simonw]

This works now! simonw/datasette-plugin-template-demo@2de806a

It would be cool if it posted a comment on the commit in the datasette-plugin repo linking to the "browse files" for the new demo.

Here's a recipe for posting a commit comment from https://stackoverflow.com/a/58469094:

      - name: Add commit comment
        run: |
          jq -nc '{"body": "test comment"}' | \
          curl -sL  -X POST -d @- \
            -H "Content-Type: application/json" \
            -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            "https://api.github.com/repos/$GITHUB_REPOSITORY/commits/$GITHUB_SHA/comments"

[simonw]

echo "Demo: https://github.com/simonw/datasette-plugin-template-demo/tree/$(git rev-parse HEAD)"

[simonw]

export FULL_SHA=$(git rev-parse HEAD)
export SHORT_SHA=${FULL_SHA::8}
export NEWLINE=$'\n'
echo '{}' | jq --arg v "Demo: https://github.com/simonw/datasette-plugin-template-demo/tree/$SHORT_SHA" \
          '. + { text: $v }'

[simonw]

It works, and it adds the comment! acd7aee