feat: [BT-10437]: Autotagging - Detect material service changes

.engops/pr_source_code_changes.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+# Copyright 2025 Harness Inc. All rights reserved.
+# Use of this source code is governed by the PolyForm Free Trial 1.0.0 license
+# that can be found in the licenses directory at the root of this repository, also available at
+# https://polyformproject.org/wp-content/uploads/2020/05/PolyForm-Free-Trial-1.0.0.txt.
+
+###################################################
+# Purpose
+# The purpose of this script is to facilitate auto-tagging of
+# Jira tickets with fix-versions. There are two tricky parts to auto-tagging:
+#
+# 1. Given a change set (PR diff), what constitutes a change to a service?
+# 2. Given you've determined a set of files has changed a service, which service was changed?
+#
+# As this repository is a single-service repository, there is no concern with number 2 above.
+#
+# This script endeavors to answer question number one - which files constitute a change to a service
+# Given an input file which is the git diff from a PR
+# this script should determine what file changes in the diff
+# constitute a material change to a service. At the time
+# of this writing, this currently only identifies java and go
+# files, and if those files are in the change list, then those
+# file names are returned in the output file.
+#
+# Inputs
+# $1 - the git diff from the pull request
+# $2 - the output file which should ultimately contain file names from the diff that affect a service
+#
+# See BT-10437 for more information
+# See https://harness.atlassian.net/wiki/spaces/ENGOPS/pages/22218015100/Multi-service+repositories+-+Mapping+file+changes+to+affected+services+for+CX+Tagging+Communication
+#
+# Owner: Engops
+# Author: Marc Batchelor
+###################################################
+prDiff=$1
+sourceDiffNames=$2
+if [ -z "$prDiff" ]; then
+  echo "Missing input PR Difference file."
+  exit 1
+fi
+if [ ! -f "$prDiff" ]; then
+  echo "Input file $prDiff does not exist and is required."
+  exit 2
+fi
+if [ -z "$sourceDiffNames" ]; then
+  echo "Missing output file."
+  exit 3
+fi
+if [ ! -f "$sourceDiffNames" ]; then
+  echo "File $sourceDiffNames does not exist and is required."
+  exit 4
+fi
+
+
+# Java files (and other files) which end up in jars - these are kept in .../src/main/x/x/x/* 
+cat "$diffResp" | grep -E "^diff .*java$" | grep -v "/test/" | sed 's/diff --git a\///' | sed 's/ b\/.*$//' > $sourceDiffNames
+# go files (without tests)
+cat "$diffResp" | grep -E "^diff .*.go$|^diff .*.mod$" | grep -v "test_"| sed 's/diff --git a\///' | sed 's/ b\/.*$//' >> $sourceDiffNames
+# Other potential source files
+cat "$diffResp" | grep -E "^diff .*.(css|gradle|graphql|gv|html|iml|js|json|mustache|pl|properties|proto|ps1|py|pyc|qbg|repo|rs|sh|sha256|sql|sum|tf|tgz|tpl|xml|yaml|yml)$" | sed 's/diff --git a\///' | sed 's/ b\/.*$//' >> $sourceDiffNames