fetch-upstream-prs.sh

#!/bin/bash
set -e

UPSTREAM_REPO="mhutchie/vscode-git-graph"
JSON_FILE="/tmp/upstream_prs_details.json"

# Check if JSON file exists, if not generate it
if [ ! -f "$JSON_FILE" ]; then
    echo "🔍 Fetching open PRs from $UPSTREAM_REPO..."
    gh pr list --repo "$UPSTREAM_REPO" --limit 100 --state open \
      --json number,title,author,headRefName \
      > "$JSON_FILE"
fi

echo "✅ Loading PRs from $JSON_FILE..."
count=0

# Loop through PRs and fetch them
jq -c '.[]' "$JSON_FILE" | while read -r pr; do
  number=$(echo "$pr" | jq -r '.number')
  title=$(echo "$pr" | jq -r '.title')
  author=$(echo "$pr" | jq -r '.author.login')
  
  # Sanitize branch name
  safe_title=$(echo "$title" | sed -e 's/[^A-Za-z0-9._-]/_/g' | cut -c 1-30)
  branch_name="upstream/pr-${number}-${author}"
  
  echo "⬇️  Fetching PR #$number ($title) -> $branch_name"
  
  # Fetch the pull request head to a local branch
  if git fetch upstream pull/$number/head:$branch_name; then
      echo "   ✅ Fetched successfully"
  else
      echo "   ❌ Failed to fetch"
  fi
  
  count=$((count + 1))
done

echo ""
echo "🎉 Fetched $count PRs into local branches."
echo "💡 You can now checkout these branches and merge them into your master."
echo "   Example: git checkout upstream/pr-910-MatriQ && git merge master"