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Mono framework is an alternative framework for running .NET applications on both Windows and Unix-based platforms.
For more information please refer to the Mono official site.

Supported Build Runners

TeamCity supports running .NET builds using NAnt and MSBuild runners under Mono framework as well as under .NET Frameworks. (MSBuild as xbuild in Mono). 
Since TeamCity 2017.1 NuGet runners support Linux and macOS when Mono is installed on the agent. Note that only NuGet CLI 3.2+ on Mono 4.4.2+ is supported. 

Tests reporting tasks are also supported under Mono.

Mono Platform Detection

When a build agent starts, it detects a Mono installation automatically.

On each platform, Mono detection is compatible with NAnt one. See NAnt.exe.config for frameworks detection on NAnt.

Agent Properties

When Mono is detected automatically on the agent side, the following properties are set:

  • Mono — path to the mono executable (Mono JIT)
  • MonoVersion — Mono version
  • MonoX.Z — set to MONO_ROOT/lib/mono/X.Z if exists
  • MonoX.Z_x64 — set to MONO_ROOT/lib/mono/X.Z if exists and Mono architecture is x64
  • MonoX.Z_x86 — set to MONO_ROOT/lib/mono/X.Z if exists and Mono architecture is x86

If the Mono installation cannot be detected automatically (for example, you have installed Mono framework into a custom directory), you can make these properties available to build runners by setting them manually in the agent configuration file.

Windows Specifics

Automatic detection of Mono framework under Windows has the following specifics:

  1. The Mono version is read from HKLM\SOFTWARE\Novell\Mono\DefaultCLR
  2. The Frameworks paths are extracted from HKLM\SOFTWARE\Novell\Mono\ %MonoVersion%
  3. The platform architecture is detected by analyzing mono.exe

Mac OS X Specifics

  1. The framework is detected automatically from /Library/Frameworks/Mono.framework/Versions
  2. The highest version is selected.
  3. The frameworks path are extracted from /Library/Frameworks/Mono.framework/Versions/%MonoVersion%/lib/mono
  4. The platform architecture is fixed to x86 as Mono official builds support only X86

Custom Linux/Unix Specifics

Automatic detection of Mono framework under Unix has the following specifics:

  1. Mono version is read from "pkg-config --modversion mono"
  2. The frameworks paths are extracted from "pkg-config --variable=prefix mono" and "pkg-config --variable=libdir mono"
  3. The platform architecture is detected by analyzing the PREFIX/bin/mono executable.

You can force Mono to be detected from a custom location by adding the PREFIX/bin directory to the beginning of the PATH and updating PKG_CONFIG_PATH (described in pkg-config(1)) with PREFIX/lib/pkgconfig.

 

 


See also:

Administrator's Guide: NAnt | MSBuild | NuGet