Migrate all projects in a directory to Bun global virtual store (install once, link everywhere)

bun-globalstore

#!/usr/bin/env bash
# Enable Bun global virtual store for all projects in a directory.
# Usage: bun-globalstore [dir]   (defaults to current directory)

set -euo pipefail

ROOT="${1:-.}"
ROOT="$(realpath "$ROOT")"

BUNFIG_BLOCK='[install]
linker = "isolated"
globalStore = true'

echo "Scanning: $ROOT"
echo ""

found=0
skipped=0

for pkg in "$ROOT"/*/package.json; do
  [ -f "$pkg" ] || continue
  dir="$(dirname "$pkg")"
  name="$(basename "$dir")"
  bunfig="$dir/bunfig.toml"

  # Skip if already has globalStore = true
  if grep -q "globalStore = true" "$bunfig" 2>/dev/null; then
    echo "  skip  $name (already configured)"
    ((skipped++)) || true
    continue
  fi

  # Append or create bunfig.toml
  if [ -f "$bunfig" ]; then
    # Merge: add missing keys under existing [install] section, avoid duplicates
    grep -q "linker" "$bunfig" || echo 'linker = "isolated"' >> "$bunfig"
    grep -q "globalStore" "$bunfig" || echo 'globalStore = true' >> "$bunfig"
    echo "  patch $name (updated existing bunfig.toml)"
  else
    printf '%s\n' "$BUNFIG_BLOCK" > "$bunfig"
    echo "  write $name (created bunfig.toml)"
  fi

  echo "  install $name..."
  (cd "$dir" && rm -rf node_modules && bun install 2>&1 | tail -3)
  echo ""

  ((found++)) || true
done

echo "Done. Configured: $found  Skipped: $skipped"
echo "Shared store: ~/.bun/install/cache/links"
du -sh ~/.bun/install/cache/links 2>/dev/null || true