Maximum limit for enterprise IPA file (in-house)? - ios

Question

I'm building an enterprise IPA file.
What's the maximum app size limit of the IPA file that I can build?
According to this apple link:
https://help.apple.com/app-store-connect/#/dev611e0a21f
1) Maximum executable file size (iOS 9.0 and later): 500 MB
--> What is the meaning of "Maximum executable file size? is it .h .m .a .framework files? how do I check it?
2) Your app’s total uncompressed size must be less than 4GB.
--> is this the size of the xarchive file?

Answer 1

1.) Maximum executable size
The documentation states:
each Mach-O executable file — for example, app_name.app/app_name — must not exceed these maximum file sizes:
for iOS 9.0 and later: 500 MB (For the total of all __TEXT sections in the binary.)
So you
uncompress your ipa file (which in fact is simply a zip file, just rename it :-)
go to Payload\app_name.app
find out the size of app_name
For example:
user$ unzip Enterprise.ipa
user$ cd Payload/Enterprise.app/
user$ size Enterprise
__TEXT __DATA __OBJC others dec hex
8192 4096 0 20480 32768 8000 Enterprise (for architecture armv7)
8192 4096 0 20480 32768 8000 Enterprise (for architecture armv7s)
So you simply sum up the size of the __TEXT sections and check if it fits.
2.) Total uncompressed size
This is simple the size of everything that gets uncompressed - see above: .ipa is simply a zip format, therefore just uncompress it and check the size of all:
user$ du -k Payload/
4 Payload//Enterprise.app/_CodeSignature
8 Payload//Enterprise.app/en.lproj
128 Payload//Enterprise.app
128 Payload/
(so here it's 128 kB, quite room for improvements I guess)