MOBILE-3749 github: Prepare workflow

.github/scripts/prepare.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+source "./.github/scripts/functions.sh"
+BRANCH=${GITHUB_REF##*/}
+
+if [ -z $GIT_TOKEN ] || [ -z $BRANCH ] || [ $GITHUB_REPOSITORY != 'moodlehq/moodleapp' ]; then
+    print_error "Env vars not correctly defined"
+    exit 1
+fi
+
+print_title "Run prepare scripts"
+# TODO Change branch name.
+git clone --depth 1 --single-branch --branch ionic5 https://$GIT_TOKEN@github.com/moodlemobile/apps-scripts.git ../scripts
+cp ../scripts/*.sh scripts/
+
+if [ ! -f scripts/prepare.sh ]; then
+    print_error "Prepare file not found"
+    exit 1
+fi
+
+print_title 'Prepare Build'
+./scripts/prepare.sh
+
+if [ $? -ne 0 ]; then
+    exit 1
+fi

.github/workflows/prepare.yml

@@ -0,0 +1,20 @@
+name: Prepare
+
+on:
+  push:
+    branches: [ master, integration, ionic5, workplace, freemium-master ]
+
+jobs:
+  prepare:
+    if: github.repository == 'moodlemobile/moodleapp'
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        persist-credentials: false
+        fetch-depth: 0
+    - name: Prepare builds
+      env:
+        GIT_TOKEN: ${{ secrets.GIT_TOKEN }}
+      run: ./.github/scripts/prepare.sh