Automatically increment and set build number of an Xcode project by counting git commits of the current branch

.sh

# This build phase script updates the Info.plist file of your archived Xcode project with the current build number
# The build number is calculated by counting the amount of git commits on the current branch

# Updating the plist file in the archive has the benefits that this won't result in a code change which then would be visible in git as uncommited change
# Just set the build number in Xcode to something like "AUTO_GENERATED" in order to make clear that this value comes from somewhere else

# You need to add the script after the "Copy Bundle Ressource" phase, otherwise, there wont be an archive
# Ideally, just place it at the end of your build phases

# If your app uses a Settings.bundle and the settings should show the app version, you can use the second part of the script to update the settings bundle
# Otherwise, you just need the first part



# *** Update Info.plist file in archive with build number ***

# Calculate build number by counting git commits and set the build number in the Info.plist of the .app file
BUILD_NUMBER=`git rev-list --count HEAD`
INFO_PLIST="${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app/Info.plist"
/usr/libexec/PlistBuddy -c "Set :CFBundleVersion ${BUILD_NUMBER}" "${INFO_PLIST}"

# ******



# *** Update Root.plist file in Settings.bundle with version and build number ***

# Create version string
VERSION_NUMBER=$(/usr/libexec/PlistBuddy -c "Print CFBundleShortVersionString" ${SRCROOT}/${INFOPLIST_FILE})
VERSION_AND_BUILD_NUMBER="$VERSION_NUMBER ($BUILD_NUMBER)"

# Iterate through plist file in settings bundle and search for the bundle version key
# If found, set the value to the new version string
DEFAULTS_VERSION_KEY="CFBundleVersion"
SETTINGS_ROOTPLIST="${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.app/Settings.bundle/Root.plist"
for i in {0..50}; do
    CURRENT_KEY=`/usr/libexec/PlistBuddy -c "Print PreferenceSpecifiers:${i}:Key" "${SETTINGS_ROOTPLIST}"`
    if [ "${CURRENT_KEY}" == "${DEFAULTS_VERSION_KEY}" ]; then
        /usr/libexec/PlistBuddy -c "Set PreferenceSpecifiers:${i}:DefaultValue ${VERSION_AND_BUILD_NUMBER}" "${SETTINGS_ROOTPLIST}"
        break
    fi
done

# ******