iOS versioning from DVCS

KUtils.h

#import <Foundation/Foundation.h>
 
@interface KUtils : NSObject
 
+ (NSString *)getVersionInfo;
 
@end

KUtils.m

#import "KUtils.h"

@implementation KUtils
+ (NSString *)getVersionInfo
{
    // NSString *version = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];
    // NSString *shortVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleShortVersionString"];
    NSString *fullVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"FullVersion"];
    NSString *productName = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleDisplayName"];
    NSString *appVersionInfo = [NSString stringWithFormat:@"%@ version: %@", productName,  fullVersion];
    
    return appVersionInfo; // app version would contain something like this "AppName 0.0.0-8-90ee99d-dirty"
}
@end

xcode-hg-version.sh

#!/bin/bash

# This script automatically sets the version and short version string of
# an Xcode project from the Git repository containing the project.
#
# To use this script in Xcode, add the contents to a "Run Script" build
# phase for your application target.

# NOTE: make sure you add a new value to your Info plist called "FullVersion"
#
# NOTE: if you receive error saying 'fatal: Not a git responsitory', make sure |--git-dir| points 
# to the root dir of your repo
#
# NOTE: if your git repo has no tags, this would fail, so make sure you create at least one tag 
# (I usually create a tag '0.0.0' at the very first commit, you can do the same).

set -o errexit
set -o nounset

INFO_PLIST="${BUILT_PRODUCTS_DIR}/${WRAPPER_NAME}/Info"

# Get git tag and hash in the FullVersion
FULL_VERSION=$(hg -R "${PROJECT_DIR}" log -r . --template '{latesttag}-{latesttagdistance}-{node|short}')

# Use the latest tag for short version (You'll have to make sure that all your tags are of the format 0.0.0,
# this is to satisfy Apple's rule that short version be three integers separated by dots)
# using git tag for version also encourages you to create tags that match your releases
SHORT_VERSION=$(hg -R "${PROJECT_DIR}" log -r . --template '{latesttag}')

# But Apple wants this value to be a monotonically increasing integer, so
# instead use the number of commits on the master branch. If you like to
# play fast and loose with your Git history, this may cause you problems.
# Thanks to @amrox for pointing out the issue and fix.
VERSION=$(hg -R "${PROJECT_DIR}" log -r . --template '{rev}')

defaults write "$INFO_PLIST" CFBundleShortVersionString $SHORT_VERSION
defaults write "$INFO_PLIST" CFBundleVersion $VERSION
defaults write "$INFO_PLIST" FullVersion $FULL_VERSION

echo "VERSION: ${VERSION}"
echo "SHORT VERSION: ${SHORT_VERSION}"
echo "FULL VERSION: ${FULL_VERSION}"