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Add Dependabot config and auto-merge workflow #426

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21 changes: 21 additions & 0 deletions .github/dependabot.yml
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version: 2
updates:
- package-ecosystem: "npm"
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@Hayden-IO Hayden-IO Mar 31, 2026

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Can we add a cooldown period, given the frequency of npm package compromises?

directory: "/"
schedule:
interval: "weekly"
open-pull-requests-limit: 10
groups:
npm-security:
applies-to: security-updates
npm-minor-patch:
applies-to: version-updates
update-types:
- "minor"
- "patch"

- package-ecosystem: "github-actions"
directory: "/"
schedule:
interval: "weekly"
open-pull-requests-limit: 5
25 changes: 25 additions & 0 deletions .github/workflows/dependabot-automerge.yml
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name: Dependabot auto-merge

on: pull_request

permissions:
contents: write
pull-requests: write

jobs:
dependabot:
runs-on: ubuntu-latest
if: github.actor == 'dependabot[bot]'
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@Hayden-IO Hayden-IO Mar 31, 2026

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https://docs.github.com/en/code-security/tutorials/secure-your-dependencies/automating-dependabot-with-github-actions#enabling-automerge-on-a-pull-request suggests using github.event.pull_request.user.login rather than github.actor, can we use that? I'm guessing that makes this more resistant to impersonation attempts?

steps:
- name: Fetch Dependabot metadata
id: metadata
uses: dependabot/fetch-metadata@d7267f607e9d3fb96fc2fbe83e0af444e5f3fcc8 # v2.4.0
with:
github-token: "${{ secrets.GITHUB_TOKEN }}"

- name: Enable auto-merge for patch and minor updates
if: steps.metadata.outputs.update-type != 'version-update:semver-major'
run: gh pr merge --auto --squash "$PR_URL"
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@Hayden-IO Hayden-IO Mar 31, 2026

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I'm not 100% sure this will work, as we have the repo configured to require a review from someone who isn't the submitter. If this does work, I think we'll need another step to approve the PR too since we require PR approval before merging.

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@mfbrki mfbrki Apr 7, 2026

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O

env:
PR_URL: ${{ github.event.pull_request.html_url }}
GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
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