test(ci): extract package creation script from patch-package flow

this will be reused in other flows to create local packages prior
to testing, for use in the testing

Author: mikehardy

.github/workflows/create_test_patches.yml

@@ -59,17 +59,7 @@ jobs:
           # yarn3+ by default disables lockfile alteration in CI. We want it.
           YARN_ENABLE_IMMUTABLE_INSTALLS: false
         run: |
-          PACKAGE_LIST=`find packages -maxdepth 1 -mindepth 1 -type d -exec basename {} \; | egrep -v 'template|invites'`
-          mkdir $HOME/packages
-          for PACKAGE in $PACKAGE_LIST; do
-            echo "Packing PR version of package $PACKAGE"
-            pushd packages/$PACKAGE;
-            yarn pack;
-            mv package.tgz $HOME/packages/react-native-firebase-${PACKAGE}.tgz;
-            ls -la $HOME/packages/*${PACKAGE}*
-            popd;
-          done
-          ls -la $HOME/packages/
+          ./.github/workflows/scripts/create_npm_packages.sh ./packages $HOME/packages 
           cd $HOME
           npx @react-native-community/cli init template --skip-install --skip-git-init
           cd template

.github/workflows/scripts/create_npm_packages.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+SOURCE_PACKAGE_DIR="$1"
+TARGET_PACKAGE_DIR="$2"
+
+echo "Creating local npm packages from source '${SOURCE_PACKAGE_DIR}' in '${TARGET_PACKAGE_DIR}'..."
+
+# Make sure our target directory exists and is clean from previous runs
+if ! [ -d "${TARGET_PACKAGE_DIR}" ]; then
+  mkdir "${TARGET_PACKAGE_DIR}"
+else
+  rm -f "${TARGET_PACKAGE_DIR}"/*.tgz
+fi
+
+if ! [ -d "${SOURCE_PACKAGE_DIR}" ]; then
+  echo "Source package dir '${SOURCE_PACKAGE_DIR} not found."
+  exit 1;
+fi
+
+# Get our full list of packages, except any we specifically ignore
+IGNORED_PACKAGE_NAMES='template|invites'
+PACKAGE_LIST=`find ${SOURCE_PACKAGE_DIR} -maxdepth 1 -mindepth 1 -type d -exec basename {} \; | egrep -v "${IGNORED_PACKAGE_NAMES}"`
+
+# Pack up each package
+for PACKAGE in $PACKAGE_LIST; do
+  echo "Creating package for $PACKAGE from local source"
+  pushd "${SOURCE_PACKAGE_DIR}/${PACKAGE}";
+  yarn pack;
+  mv package.tgz "${TARGET_PACKAGE_DIR}/react-native-firebase-${PACKAGE}.tgz";
+  ls -la "${TARGET_PACKAGE_DIR}/react-native-firebase-${PACKAGE}.tgz"
+  popd;
+done
+ls -la "${TARGET_PACKAGE_DIR}"