Issue #3503067 by daffie: Create script to create Drupal core patch

scripts/generate-core-patch.sh

+#!/bin/bash
+
+# This script is to generate a Drupal core patch from the PR for the full support issue.
+# The expected first parameter is the file name of the downloaded PR.
+# The expected second parameter is the version for which to create the patch file.
+
+if [[ -z $1 ]]; 
+then 
+  echo "The patch file to generate the Drupal core patch file for must be given as the first parameter"
+  exit 1; 
+fi
+
+if [[ ! -f $1 ]];
+then
+  echo "The patch file to generate the Drupal core patch file for does not exist."
+  exit 1; 
+fi
+
+if [[ -z $2 ]]; 
+then 
+  echo "The patch file to generate the Drupal core patch file for must be given a version as the second parameter"
+  exit 1; 
+fi
+
+echo 'Start generating Drupal core patch file...'
+
+# Get the current directory to copy the created patch file to.
+currentdir=$(pwd)
+
+# Create a temporary directory.
+tempdir=$(mktemp -d)
+
+# Copy the base PR file to the temporary directory.
+cp $1 $tempdir
+
+# Make the temporary directory the current working directory
+cd $tempdir
+
+if [[ ! -f $1 ]];
+then
+  echo "The patch file to generate the Drupal core patch file for does not exist in the temporary directory: '$tempdir'."
+  exit 1; 
+fi
+
+# Split the base PR file into single file with one for every file change.
+splitdiff -ad $1 > /dev/null 2>&1
+
+# Remove all the test files.
+find . -name '*Test.php.patch' | xargs rm -f
+find . -name '*tests*' | xargs rm -f
+find . -name '*Test*' | xargs rm -f
+
+# Remove all the mongodb module files.
+find . -name '*core_modules_mongodb*' | xargs rm -f
+
+# Remove the composer changes.
+find . -name '*composer*' | xargs rm -f
+
+# Remove the GitLab pipeline file changes.
+find . -name '*gitlab*' | xargs rm -f
+
+# Remove the PHPStan baseline file changes.
+find . -name '*phpstan-baseline*' | xargs rm -f
+
+# Remove the CSpell file changes.
+find . -name '*cspell*' | xargs rm -f
+
+#find . -name '*migrate_source*' | xargs rm -f
+
+# Get the number of file changes.
+count=$(ls -1 | wc -l)
+
+printf "%s\n" 'The Drupal core patch has '$count' file changes'
+
+combined='drupal-core-'$2
+
+touch $combined'.diff' 
+
+# Create the Drupal core patch file.
+cat *.patch >> $combined'.diff'
+
+# Copy the created Drupal core patch file to the current directory.
+cp $combined'.diff' $currentdir/$combined'.patch'
+
+echo "Finished! The Drupal core patch file is: '$combined.patch'"
+