Add instructions on building and contributing to README.md; Make ICSharpCode.Decompiler.csproj work properly with VSmac.

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project>
-  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.props" />
+  <Import Condition=" '$(OS)' == 'Windows_NT' " Sdk="Microsoft.NET.Sdk" Project="Sdk.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netstandard2.0</TargetFrameworks>
+    <TargetFramework Condition=" '$(OS)' != 'Windows_NT' ">netstandard2.0</TargetFramework>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">netstandard2.0;net461</TargetFrameworks>
 
     <Description>IL decompiler engine</Description>
     <Company>ic#code</Company>
@@ -19,8 +20,9 @@
     <SignAssembly>True</SignAssembly>
     <AssemblyOriginatorKeyFile>ICSharpCode.Decompiler.snk</AssemblyOriginatorKeyFile>
   </PropertyGroup>
-
+  
-  <PropertyGroup>
+  <!-- HACK: Disable package generation on Unix due to tooling issues. -->
+  <PropertyGroup Condition=" '$(OS)' == 'Windows_NT' ">
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <IncludeSymbols>true</IncludeSymbols>
     <NuspecFile>ICSharpCode.Decompiler.nuspec</NuspecFile>
@@ -560,12 +562,12 @@
     <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
   </ItemGroup>
 
-  <Import Sdk="Microsoft.NET.Sdk" Project="Sdk.targets" />
+  <Import Condition=" '$(OS)' == 'Windows_NT' " Sdk="Microsoft.NET.Sdk" Project="Sdk.targets" />
 
   <Target Name="BeforeBuild">
     <PropertyGroup>
       <UpdateAssemblyInfo>powershell.exe -NoProfile -ExecutionPolicy Bypass -File $(SolutionDir)\BuildTools\update-assemblyinfo.ps1</UpdateAssemblyInfo>
-      <UpdateAssemblyInfo Condition="$(OS)=='Unix'">mono $(UpdateAssemblyInfo)</UpdateAssemblyInfo>
+      <UpdateAssemblyInfo Condition="$(OS)=='Unix'">powershell -NoProfile -ExecutionPolicy Bypass -File $(SolutionDir)\BuildTools\update-assemblyinfo.ps1</UpdateAssemblyInfo>
     </PropertyGroup>
     <Exec WorkingDirectory="$(SolutionDir)" Command="$(UpdateAssemblyInfo)" Timeout="60000" />
   </Target>

README.md

@@ -21,3 +21,26 @@ Included open-source libraries:
  * ICSharpCode.Decompiler: MIT License (developed as part of ILSpy)
  * Ricciolo.StylesExplorer: MS-PL (part of ILSpy.BamlDecompiler.Plugin)
  * Newtonsoft Json.NET: MIT License
+
+How to build
+------------
+
+Windows:
+- Check out the repository using git.
+- Execute `git submodule update --init --recursive` to get all required submodules.
+- Use ILSpy.sln to work.
+
+Unix:
+- Check out the repository using git.
+- Execute `git submodule update --init --recursive` to get all required submodules.
+- Edit `\ICSharpCode.Decompiler\ICSharpCode.Decompiler.csproj`
+  Add `Sdk="Microsoft.NET.Sdk"` to the `Project` element.
+  This is required due to a tooling issue on Unix.
+  Please do not commit this when contributing a pull request!
+- Use ICSharpCode.Decompiler.Console.sln to work.
+
+How to contribute
+-----------------
+
+- Report bugs
+- If you want to contribute a pull request, please add https://gist.github.com/siegfriedpammer/75700ea61609eb22714d21885e4eb084 to your `.git/hooks` to prevent checking in code with wrong indentation. We use tabs and not spaces. The build server runs the same script, so any pull requests using wrong indentation will fail.