Problem with cake script compilation with travis, trusty, mono and dotnet.

[dazinator]

Creating issue as per: https://stackoverflow.com/questions/49677894/travis-ci-mono-5-4-0-201/49678678?noredirect=1#comment86374258_49678678

What You Are Seeing?

Two different errors at compile of cake script stage, depending on mono version.

The first is here:

https://stackoverflow.com/questions/49677894/travis-ci-mono-5-4-0-201/49678678?noredirect=1#comment86374258_49678678

Problem as can be seen in log:

Compiling build script...
Error: Cake.Core.CakeException: Error occurred when compiling build script: (2399,40): error CS0012: The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.

And here is the travis config for this build:

{
  "language": "csharp",
  "sudo": "required",
  "dist": "trusty",
  "dotnet": "2.1.103",
  "mono": "5.2.0",
  "os": "linux",
  "before_install": [
    "git fetch --unshallow"
  ],
  "script": [
    "./build.sh -v Diagnostic"
  ],
  "cache": {
    "directories": [
      "src/packages",
      "tools"
    ]
  },
  "global_env": "DOTNET_CLI_TELEMETRY_OPTOUT=1 DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true",
  "group": "stable"
}

Full log:
GIST LINK - https://gist.github.com/dazinator/5c080921ec8f5b72d74c076a5deee63b

I then tried suggestion of upping the version of mono (tried both 5.4.0, and 5.4.1) which resulted in a different exception from mono (have linked gist below)

The travis config for this second attempt using mono 5.4.0 is:

{
  "language": "csharp",
  "sudo": "required",
  "dist": "trusty",
  "dotnet": "2.1.103",
  "mono": "5.4.0",
  "os": "linux",
  "before_install": [
    "git fetch --unshallow"
  ],
  "script": [
    "./build.sh -v Diagnostic"
  ],
  "cache": {
    "directories": [
      "src/packages",
      "tools"
    ]
  },
  "global_env": "DOTNET_CLI_TELEMETRY_OPTOUT=1 DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true",
  "group": "stable"
}

And that results in a nasty mono exception.

GIST LINK - https://gist.github.com/dazinator/43419caa4f902d9b071eedd252688586

What is Expected?

Cake script compiles.

What version of Cake are you using?

latest stable cake release - 0.26.1

Are you running on a 32 or 64 bit system?

See travis build definition.

What environment are you running on? Windows? Linux? Mac?

Linux (with mono and dotnet) as per travis build config above.

Are you running on a CI Server? If so, which one?

Travis: https://stackoverflow.com/questions/49677894/travis-ci-mono-5-4-0-201/49678678?noredirect=1#comment86374258_49678678

How Did You Get This To Happen? (Steps to Reproduce)

Run the travis build.

Output Log

There are two different errors I am seeing depending on mono version used.

Mono version 5.2.0:
GIST LINK - https://gist.github.com/dazinator/5c080921ec8f5b72d74c076a5deee63b

Mono version 5.4.0 (also similar error on 5.4.1)
GIST LINK - https://gist.github.com/dazinator/43419caa4f902d9b071eedd252688586

[dazinator]

Here is exact cake version from tools/packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
	 <package id="Cake" version="0.26.1" />
	 <package id="Cake.CoreCLR" version="0.26.1" />
</packages>