Use same CFBundleVersion and CFBundleShortVersionString in all targets

My solution is:

For CFBundleShortVersionString:

• Add a user-defined constant in your project settings

• Name it $(CF_BUNDLE_SHORT_VERSION_STRING) and set it to your desired value

• Set your version in your targets to $(CF_BUNDLE_SHORT_VERSION_STRING)

• Repeat for all targets. Done!

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CFBundleVersion: you could do the same for CFBundleVersion, but somehow I wanted this value to be computed from my GIT repo commit count. I´ve done it like this:

• Add a Pre-action to your main target. You access the shown dialog via Product > Scheme > Edit Scheme

• Add a Post-action to your main target.

• Add a new Command Line Tool target named BundleVersionUpdate and one named BundleVersionRevert

• Navigate to your new BundleVersionUpdate target and add a new Run Script Build Phase

• Paste the following

\#!/bin/sh

INFOPLIST="${SRCROOT}/MyApp/MyApp-Info.plist"
INFOPLIST_WKAPP="${SRCROOT}/MyApp-WKApp/Info.plist"
INFOPLIST_WKEXT="${SRCROOT}/MyApp-WKExt/Info.plist"

PLISTCMD="Set :CFBundleVersion $(git rev-list --all|wc -l)"

echo -n "$INFOPLIST" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

echo -n "$INFOPLIST_WKAPP" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

echo -n "$INFOPLIST_WKEXT" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

• Navigate to your new BundleVersionRevert target and add a new Run Script Build Phase and paste this:

\#!/bin/sh

INFOPLIST="${SRCROOT}/MyApp/MyApp-Info.plist"
INFOPLIST_WKAPP="${SRCROOT}/MyApp-WKApp/Info.plist"
INFOPLIST_WKEXT="${SRCROOT}/MyApp-WKExt/Info.plist"

PLISTCMD="Set :CFBundleVersion SCRIPTED"

echo -n "$INFOPLIST" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

echo -n "$INFOPLIST_WKAPP" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

echo -n "$INFOPLIST_WKEXT" 
| xargs -0 /usr/libexec/PlistBuddy -c "$PLISTCMD"

• Enjoy!

The scheme actions aren't in source control so it's better to add a build phase into your app's target. Syncing the versions across all targets can be solved with a simple script that can be modified for every target you want synced:

1. Add "New Run Script Phase" in "Build Phases" for your app's target

2. Rename the script to something like "Sync Versions" and drag it above "Compile Sources" (NOTE: Xcode has a bug that may prevent the drag-drop to work. If so, you'll need to manually edit the .pbxproj file so the build phase goes in the right spot

3. Paste the following script into the shell:

   INFOPLIST_MYAPP="${SRCROOT}/MyApp/MyApp-Info.plist"
   myAppVersion=$(/usr/libexec/PlistBuddy -c "Print CFBundleShortVersionString" "$INFOPLIST_MYAPP")
   myAppBuild=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "$INFOPLIST_MYAPP")
   
   INFOPLIST_SHAREEXT="${SRCROOT}/ShareExtension/Info.plist"
   /usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString $myAppVersion" "$INFOPLIST_SHAREEXT"
   /usr/libexec/PlistBuddy -c "Set :CFBundleVersion $myAppBuild" "$INFOPLIST_SHAREEXT"
   

4. Build your project as you normally and your share extension's version & build will stay in sync with your main target.