Make transpilation setup local to this repo (#4041)

Co-authored-by: Ernesto García <ernestognw@gmail.com>

scripts/upgradeable/transpile.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -euo pipefail -x
+
+DIRNAME="$(dirname -- "${BASH_SOURCE[0]}")"
+
+bash "$DIRNAME/patch-apply.sh"
+
+npm run clean
+npm run compile
+
+build_info=($(jq -r '.input.sources | keys | if any(test("^contracts/mocks/.*\\bunreachable\\b")) then empty else input_filename end' artifacts/build-info/*))
+build_info_num=${#build_info[@]}
+
+if [ $build_info_num -ne 1 ]; then
+  echo "found $build_info_num relevant build info files but expected just 1"
+  exit 1
+fi
+
+# -D: delete original and excluded files
+# -b: use this build info file
+# -i: use included Initializable
+# -x: exclude proxy-related contracts with a few exceptions
+# -p: emit public initializer
+npx @openzeppelin/upgrade-safe-transpiler@latest -D \
+  -b "$build_info" \
+  -i contracts/proxy/utils/Initializable.sol \
+  -x 'contracts-exposed/**/*' \
+  -x 'contracts/proxy/**/*' \
+  -x '!contracts/proxy/Clones.sol' \
+  -x '!contracts/proxy/ERC1967/ERC1967Storage.sol' \
+  -x '!contracts/proxy/ERC1967/ERC1967Upgrade.sol' \
+  -x '!contracts/proxy/utils/UUPSUpgradeable.sol' \
+  -x '!contracts/proxy/beacon/IBeacon.sol' \
+  -p 'contracts/**/presets/**/*'