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‎.gitignore‎

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## Ignore Visual Studio temporary files, build results, and
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## files generated by popular Visual Studio add-ons.
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# User-specific files
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*.suo
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*.user
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*.userosscache
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*.sln.docstates
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# User-specific files (MonoDevelop/Xamarin Studio)
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*.userprefs
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# Build results
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[Dd]ebug/
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[Dd]ebugPublic/
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[Rr]elease/
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[Rr]eleases/
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x64/
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x86/
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bld/
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[Bb]in/
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[Oo]bj/
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# Visual Studio 2015 cache/options directory
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.vs/
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# MSTest test Results
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[Tt]est[Rr]esult*/
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[Bb]uild[Ll]og.*
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# NUNIT
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*.VisualState.xml
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TestResult.xml
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# Build Results of an ATL Project
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[Dd]ebugPS/
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[Rr]eleasePS/
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dlldata.c
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# DNX
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project.lock.json
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artifacts/
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*_i.c
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*_p.c
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*_i.h
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*.ilk
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*.obj
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*.pch
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*.pdb
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*.pgc
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*.pgd
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*.rsp
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*.sbr
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*.tlb
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*.tli
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*.tlh
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*.tmp
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*.tmp_proj
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*.log
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*.vspscc
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*.vssscc
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.builds
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*.pidb
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*.svclog
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*.scc
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# Chutzpah Test files
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_Chutzpah*
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# Visual C++ cache files
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ipch/
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*.aps
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*.ncb
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*.opensdf
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*.sdf
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*.cachefile
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# Visual Studio profiler
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*.psess
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*.vsp
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*.vspx
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# TFS 2012 Local Workspace
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$tf/
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# Guidance Automation Toolkit
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*.gpState
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# ReSharper is a .NET coding add-in
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_ReSharper*/
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*.[Rr]e[Ss]harper
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*.DotSettings.user
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# JustCode is a .NET coding add-in
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.JustCode
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# TeamCity is a build add-in
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_TeamCity*
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# DotCover is a Code Coverage Tool
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*.dotCover
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# NCrunch
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_NCrunch_*
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.*crunch*.local.xml
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# MightyMoose
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*.mm.*
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AutoTest.Net/
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# Web workbench (sass)
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.sass-cache/
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# Installshield output folder
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[Ee]xpress/
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# DocProject is a documentation generator add-in
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DocProject/buildhelp/
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DocProject/Help/*.HxT
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DocProject/Help/*.HxC
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DocProject/Help/*.hhc
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DocProject/Help/*.hhk
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DocProject/Help/*.hhp
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DocProject/Help/Html2
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DocProject/Help/html
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# Click-Once directory
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publish/
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# Publish Web Output
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*.[Pp]ublish.xml
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*.azurePubxml
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## TODO: Comment the next line if you want to checkin your
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## web deploy settings but do note that will include unencrypted
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## passwords
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#*.pubxml
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*.publishproj
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# NuGet Packages
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*.nupkg
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# The packages folder can be ignored because of Package Restore
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**/packages/*
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# except build/, which is used as an MSBuild target.
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!**/packages/build/
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# Uncomment if necessary however generally it will be regenerated when needed
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#!**/packages/repositories.config
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# Windows Azure Build Output
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csx/
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*.build.csdef
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# Windows Store app package directory
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AppPackages/
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# Visual Studio cache files
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# files ending in .cache can be ignored
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*.[Cc]ache
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# but keep track of directories ending in .cache
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!*.[Cc]ache/
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# Others
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ClientBin/
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[Ss]tyle[Cc]op.*
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~$*
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*~
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*.dbmdl
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*.dbproj.schemaview
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*.pfx
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*.publishsettings
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node_modules/
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orleans.codegen.cs
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.fake/
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# RIA/Silverlight projects
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Generated_Code/
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# Backup & report files from converting an old project file
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# to a newer Visual Studio version. Backup files are not needed,
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# because we have git ;-)
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_UpgradeReport_Files/
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Backup*/
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UpgradeLog*.XML
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UpgradeLog*.htm
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# SQL Server files
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*.mdf
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*.ldf
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# Business Intelligence projects
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*.rdl.data
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*.bim.layout
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*.bim_*.settings
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# Microsoft Fakes
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FakesAssemblies/
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# Node.js Tools for Visual Studio
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.ntvs_analysis.dat
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# Visual Studio 6 build log
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*.plg
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# Visual Studio 6 workspace options file
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*.opt
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# LightSwitch generated files
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GeneratedArtifacts/
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_Pvt_Extensions/
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ModelManifest.xml
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samples/Basic/Compiler/compilation log.txt

‎README.md‎

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# Unity3D.UselessAttributeStripper
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Useless attribute stripper for IL2CPPed executable. It will help for reducing app size for iOS.
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### Setup
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Unzip [a release zip file](https://github.com/SaladbowlCreative/Unity3D.UselessAttributeStripper/releases) and run setup.py.
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- Run setup.py with administrative privilege because it may update your application directory.
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- If you didn't install Unity3D to default directory, you need to check your unity3d installation path.
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if you installed unity to default path:
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```
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setup.py install
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```
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if you didn't install unity to default path:
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```
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setup.py install [unity-path]
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```
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### Check what's going on
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While unity3D builds application, it will write log on intermediate path.
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For iOS with Unity5 & IL2CPP you can find log-file at
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`./Client/Output/Data/Managed/UselessAttributeStripper.txt`. (you can see [sample log](./docs/SampleLog.txt))
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With log, you can know which attributes were removed from DLLs and the amount of removal.
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```
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- ProcessDll : /builder/GameClient/Temp/StagingArea/Data/Managed/mscorlib.dll
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- System.Runtime.InteropServices.ComVisibleAttribute : 1311
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- System.MonoTODOAttribute : 461
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- System.CLSCompliantAttribute : 374
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- (trimmed)
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```
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At the end of log, total removal infomation will be written.
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```
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* Summary *
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- System.Runtime.CompilerServices.CompilerGeneratedAttribute : 5566
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- System.Diagnostics.DebuggerHiddenAttribute : 4641
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- System.Runtime.InteropServices.ComVisibleAttribute : 1380
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- System.Runtime.CompilerServices.ExtensionAttribute : 797
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- (trimmed)
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```
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### More
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[Sample Case](./docs/SampleCase.md)

‎UselessAttributeStripper.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio 14
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VisualStudioVersion = 14.0.24720.0
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "UselessAttributeStripper", "src\UselessAttributeStripper\UselessAttributeStripper.csproj", "{2A067BAE-8AE3-4D28-B3D8-F88075E06549}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{2A067BAE-8AE3-4D28-B3D8-F88075E06549}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{2A067BAE-8AE3-4D28-B3D8-F88075E06549}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{2A067BAE-8AE3-4D28-B3D8-F88075E06549}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{2A067BAE-8AE3-4D28-B3D8-F88075E06549}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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EndGlobal

‎build.cmd‎

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@echo off
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pushd %~dp0
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tools\nuget\NuGet.exe update -self
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tools\nuget\NuGet.exe install FAKE -ConfigFile tools\nuget\Nuget.Config -OutputDirectory packages -ExcludeVersion -Version 4.12
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set encoding=utf-8
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packages\FAKE\tools\FAKE.exe build.fsx %*
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popd

‎build.fsx‎

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#I @"packages/FAKE/tools"
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#r "FakeLib.dll"
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open Fake
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open Fake.FileHelper
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open Fake.ProcessHelper
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open Fake.ZipHelper
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// ------------------------------------------------------------------------------ Project
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let buildSolutionFile = "./UselessAttributeStripper.sln"
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let buildConfiguration = "Release"
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// ---------------------------------------------------------------------------- Variables
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let binDir = "bin"
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let testDir = binDir @@ "test"
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// ------------------------------------------------------------------------------ Targets
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Target "Clean" (fun _ ->
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CleanDirs [binDir]
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)
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Target "Build" (fun _ ->
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!! buildSolutionFile
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|> MSBuild "" "Rebuild" [ "Configuration", buildConfiguration ]
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|> Log "Build-Output: "
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)
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Target "Package" (fun _ ->
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let workDir = binDir @@ "work"
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CreateDir workDir
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"./src/UselessAttributeStripper/bin/Release/UselessAttributeStripper.exe" |> CopyFile workDir
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"./src/InstallScript/setup.py" |> CopyFile workDir
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!! (workDir @@ "**") |> Zip workDir (binDir @@ "UselessAttributeStripper.zip")
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)
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Target "Help" (fun _ ->
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List.iter printfn [
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"usage:"
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"build [target]"
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""
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" Targets for building:"
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" * Build Build"
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" * Package Make packages"
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""]
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)
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// --------------------------------------------------------------------------- Dependency
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// Build order
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"Clean"
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==> "Build"
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==> "Package"
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RunTargetOrDefault "Help"

‎docs/SampleCase.md‎

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# Sample Case
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### Environment
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- Target: iOS / IL2CPP
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- Unity 5.3.1f1 (OSX)
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- OSX Yosemite 10.10.5 / XCode 7.2
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### Result executable size (original)
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Size of executable: 151,795,952 bytes
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```
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> size exe
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__TEXT __DATA __OBJC others dec hex
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26656768 2473984 0 43909120 73039872 45a8000 exe (for architecture armv7)
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30523392 3735552 0 4341760000 4376018944 104d4c000 exe (for architecture arm64)
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```
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### Result executable size (attribute stripped)
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Size of executable: 132,189,648 bytes
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```
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> size exe_stripped
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__TEXT __DATA __OBJC others dec hex
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25526272 2408448 0 35684352 63619072 3cac000 exe_stripped (for architecture armv7)
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28966912 3637248 0 4333207552 4365811712 104390000 exe_stripped (for architecture arm64)
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```
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### Compare
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| Project | Original | Stripped | Delta |
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| :------------- | ----------: | ----------: | ----------: |
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| __TEXT (armv7) | 26,656,768 | 25,526,272 | -1,130,496 |
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| __TEXT (arm64) | 30,523,392 | 28,966,912 | -1,556,480 |
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| __DATA (armv7) | 2,473,984 | 2,408,448 | -65,536 |
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| __DATA (arm64) | 3,735,552 | 3,637,248 | -98,304 |
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| others (armv7) | 43,909,120 | 35,684,352 | -8,224,768 |
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| others (arm64) | - | - | - |
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| Total | 151,795,952 | 132,189,648 | -19,606,304 |

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