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74 changes: 74 additions & 0 deletions .github/workflows/auto-assign-milestone.yml
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name: Auto-assign Milestone to PR

on:
push:
branches:
- "pull-request/[0-9]+"

permissions:
contents: read
pull-requests: write
issues: write

jobs:
assign-milestone:
runs-on: ubuntu-latest
environment: nemo-ci
steps:
- name: Get PR info
id: get-pr-info
if: startsWith(github.ref, 'refs/heads/pull-request/')
uses: nv-gha-runners/get-pr-info@main

- name: Check if PR has milestone
id: check_milestone
env:
GH_TOKEN: ${{ secrets.PAT }}
run: |
MILESTONE=$(gh pr view ${{ fromJSON(steps.get-pr-info.outputs.pr-info || '{}').number }} \
--repo ${{ github.repository }} \
--json milestone \
--jq '.milestone.title')

if [ "$MILESTONE" = "null" ] || [ -z "$MILESTONE" ]; then
echo "has_milestone=false" >> $GITHUB_OUTPUT
else
echo "has_milestone=true" >> $GITHUB_OUTPUT
echo "PR already has milestone: $MILESTONE"
fi

- name: Get most recent open milestone
if: steps.check_milestone.outputs.has_milestone == 'false'
id: get_milestone
env:
GH_TOKEN: ${{ secrets.PAT }}
run: |
# Get the most recent open milestone (sorted by due date, then by creation date)
MILESTONE_NUMBER=$(gh api \
"repos/${{ github.repository }}/milestones?state=open&sort=due_on&direction=desc" \
--jq '.[0].number')

MILESTONE_TITLE=$(gh api \
"repos/${{ github.repository }}/milestones?state=open&sort=due_on&direction=desc" \
--jq '.[0].title')

if [ -z "$MILESTONE_NUMBER" ] || [ "$MILESTONE_NUMBER" = "null" ]; then
echo "No open milestones found"
echo "milestone_found=false" >> $GITHUB_OUTPUT
else
echo "milestone_found=true" >> $GITHUB_OUTPUT
echo "milestone_number=$MILESTONE_NUMBER" >> $GITHUB_OUTPUT
echo "milestone_title=$MILESTONE_TITLE" >> $GITHUB_OUTPUT
echo "Found milestone: $MILESTONE_TITLE (number: $MILESTONE_NUMBER)"
fi

- name: Assign milestone to PR
if: steps.check_milestone.outputs.has_milestone == 'false' && steps.get_milestone.outputs.milestone_found == 'true'
env:
GH_TOKEN: ${{ secrets.PAT }}
run: |
gh pr edit ${{ fromJSON(steps.get-pr-info.outputs.pr-info || '{}').number }} \
--repo ${{ github.repository }} \
--milestone "${{ steps.get_milestone.outputs.milestone_title }}"

echo "✅ Assigned milestone '${{ steps.get_milestone.outputs.milestone_title }}' to PR #${{ fromJSON(steps.get-pr-info.outputs.pr-info || '{}').number }}"
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