Xcode - Restrict build setting changes.

restrict_build_settings_changes.sh

#!/bin/sh

# https://stackedheaps.com/2023/06/10/restrict-changes-in-xcode-build-settings

# **********************************************************************************

# Verified on Xcode 12, 13 & 14

# Running Script
# Apple.xcodeproj
# Tools/Orange.xcodeproj
# restrict_build_settings_changes.sh
#
# ./restrict_build_settings_changes.sh "Apple Tools/Orange"

# **********************************************************************************

# How empty build settings looks:
#
# buildSettings = {
# }

# How modified build settings looks:
#
# buildSettings = {
# $SETTINGS_NAME1
# $SETTINGS_NAME2
# }
# **********************************************************************************

# Space separated list of Project names (without extension)
for XCODEPROJECT in $1; do

    echo "Validating project: $XCODEPROJECT"

    PBXPROJ_FILE="$XCODEPROJECT.xcodeproj/project.pbxproj"

    echo "Project file is $PBXPROJ_FILE"

    # No of settings occurrences, just start line.
    # Start Line = buildSettings = {
    SETTINGS_START_OCCURRENCES=$(sed -n '/buildSettings = {/p' $PBXPROJ_FILE | wc -l)
    
    # If buildSettings is not modified, we expect total number should be twice as many starts.
    # Line 1 - buildSettings = {
    # Line 2 - }
    SETTINGS_EXPECTED_LINE_COUNT=$((SETTINGS_START_OCCURRENCES * 2))

    # No of settings occurrences with it's contents
    # Start Line = buildSettings = {
    # Contents = $SETTINGS1
    # End Line = }
    SETTINGS_ACTUAL_START_TO_END_LINE_COUNT=$(sed -n '/buildSettings = {/,/}/p' $PBXPROJ_FILE | wc -l)

    echo "Expected number of lines for empty buildSettings = $SETTINGS_EXPECTED_LINE_COUNT"
    echo "Actual number of lines with buildSettings contents =$SETTINGS_ACTUAL_START_TO_END_LINE_COUNT"

    if [ $SETTINGS_EXPECTED_LINE_COUNT != $SETTINGS_ACTUAL_START_TO_END_LINE_COUNT ]; then
        echo "$PBXPROJ_FILE has build setting changes, please use XCConfig."
        exit 1
    fi

done