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Build PowerShell on OS X

This guide supplements the Linux instructions, as building on OS X is almost identical.

.NET Core (and by transitivity, us) only supports OS X 10.11, per CoreFX issue #7731.

Environment

You will want Homebrew, the missing package manager for OS X. Once installed, follow the same instructions to download and install a self-hosted copy of PowerShell on your OS X machine, and useStart-PSBootstrap to install the dependencies.

The Start-PSBootstrap function does the following:

  • Uses brew to install CMake, OpenSSL, and GNU WGet
  • Links OpenSSL
  • Uninstalls any prior versions of .NET CLI
  • Downloads and installs the latest .NET CLI 1.0.0-preview2 SDK to ~/.dotnet

If you want to use dotnet outside of Start-PSBuild, add ~/.dotnet to your PATH environment variable.

error: Too many open files

Due to a bug in NuGet, the dotnet restore command will fail without the limit increased. Run ulimit -n 2048 to fix this in your session; add it your shell's profile to fix it permanently.

We cannot do this for you in the build module due to #847.

error: dotnet restore

If you run dotnet restore and get error like

PS /Users/vors/dev/PowerShell> dotnet restore                                                                                         
log  : Restoring packages for /Users/vors/dev/PowerShell/src/TypeCatalogGen/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/src/TypeCatalogParser/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/test/PSReadLine/project.json...
log  : Restoring packages for /Users/vors/dev/PowerShell/test/csharp/project.json...
error: Unable to load the service index for source http://www.myget.org/F/dotnet-core/api/v3/index.json.
error:   The type initializer for 'Crypto' threw an exception.
error:   The type initializer for 'CryptoInitializer' threw an exception.
error:   Unable to load DLL 'System.Security.Cryptography.Native': The specified module could not be found.
error:    (Exception from HRESULT: 0x8007007E)

Try the following

  • Make sure you have latest openssl and re-link it
brew update
brew install openssl
brew link --force openssl

Build using our module

Instead of installing the Ubuntu package of PowerShell, download the pkg from our GitHub releases page using your browser, complete the wizard, start a powershell session, and use Start-PSBuild from the module.

The output directory will be slightly different because your runtime identifier is different. PowerShell will be at ./src/powershell-unix/bin/Linux/netcoreapp1.0/osx.10.11-x64/powershell, or osx.10.10 depending on your operating system version. Note that configuration is still Linux because it would be silly to make yet another separate configuration when it's used solely to work-around a CLI issue.