support old fsproj (#9)

add more cli options:

`--msbuild` => path to msbuild
`--dotnetcli` => path to dotnet, used for "dotnet msbuild"
`--msbuild-host` => what msbuild host to run, to force specific or auto (oldsdk/dotnetsdk). By default for oldsdk is `msbuild` and dotnetsdk is `dotnet`  

### Old fsproj parser

Use `msbuild` from command line to ask msbuild info about the project (not using msbuild as library)

How works:

- override the `CoreCompile` target, to gather info about the project properties (OutputType, etc)
- convert the msbuild properties to fsc args, using the Fsc task code

To override the `CoreCompile` target, the `CustomAfterMicrosoftCommonTargets` property is used as hook to import the generate .target file after F# targets are imported (msbuild override targets with same name, based on import sequence)

To convert msbuild properties to fsc compiler args, use the same Fsc msbuild task class code.

- `Fsc` msbuild task from microsoft/visualfsharp repo
- msbuild classes from mono/mono repo

The strategy for `msbuild properties -> fsc args` can be customized

Additional:

- move repo to .net core 2.0
- `dotnet-proj-info` support `netcoreapp2.0` framework
- `Dotnet.ProjInfo` support `netstandard2.0` framework
- the `Fsc` task is not bundled with `Dotnet.ProjInfo`, so clients can pin another version if needed

Author: enricosada

.gitignore

@@ -238,3 +238,5 @@ _Pvt_Extensions
 # Repo-specific files
 
 .dotnetsdk
+/.paket/
+/paket-files/

.paket/paket.bootstrapper.exe

@@ -0,0 +1,20 @@
+language: csharp
+
+mono: 5.2.0
+dotnet: 2.0.0
+
+install:
+  # workaround for missing .net 4.5 targing pack
+  - export FrameworkPathOverride=$(dirname $(which mono))/../lib/mono/4.5/
+
+script:
+  - dotnet pack -v n
+  - dotnet test -v n
+
+matrix:
+  include:
+    - os: linux
+      dist: trusty
+      sudo: required
+    - os: osx
+      osx_image: xcode9

.travis.yml

@@ -6,11 +6,25 @@ see `examples` directory
 
 ## Build
 
-to create packages:
+Run:
 
+```bash
+dotnet build
 ```
-set VERSION=1.2.3
-build.cmd
+
+To run tests:
+
+```bash
+dotnet test -v n
 ```
 
-will create packages with version `1.2.3` in `artifacts\nupkgs`
+To create packages:
+
+```bash
+dotnet pack
+```
+
+will create packages in `artifacts\nupkgs`
+
+pass `/p:Version=1.2.3` to create a package with version `1.2.3`
+

README.md

@@ -0,0 +1,20 @@
+image:
+  - Visual Studio 2017
+
+before_build:
+  - ps: >-
+      $buildId = $env:APPVEYOR_BUILD_NUMBER.PadLeft(5, '0');
+      $versionSuffixPR = "-PR$($env:APPVEYOR_PULL_REQUEST_NUMBER)-$buildId";
+      $branchName = "$env:APPVEYOR_REPO_BRANCH".Replace("_","");
+      $versionSuffixBRANCH = "-$branchName-$buildId";
+      $env:VersionSuffix = if ("$env:APPVEYOR_REPO_TAG" -eq "true") { "" } else { if ("$env:APPVEYOR_PULL_REQUEST_NUMBER") { $versionSuffixPR } else { $versionSuffixBRANCH } };
+
+build_script:
+  - cmd: echo vs %VersionSuffix%"
+  - cmd: dotnet pack -v n
+  - cmd: dotnet test -v n
+
+artifacts:
+  - path: bin\nupkg\*.nupkg
+    name: nupkgs
+    type: NuGetPackage

appveyor.yml

@@ -0,0 +1,26 @@
+<Project ToolsVersion="15.0">
+
+  <Import Project="src\Directory.Build.props" />
+
+  <Target Name="Build">
+    <Exec Command='dotnet build src/dotnet-proj-info' />
+  </Target>
+
+  <Target Name="Restore">
+    <Exec Command="$(MonoOrEmpty)paket.bootstrapper.exe" WorkingDirectory=".paket" ConsoleToMSBuild="true" />
+    <Exec Command="$(MonoOrEmpty)paket.exe restore" WorkingDirectory=".paket" ConsoleToMSBuild="true" />
+  </Target>
+
+  <Target Name="Pack">
+    <RemoveDir Directories="$(NupkgsDir)" />
+    <Exec Command='dotnet pack src/dotnet-proj-info -c Release -o "$(NupkgsDir)" /p:Version=$(Version)' />
+    <Exec Command='dotnet pack src/Dotnet.ProjInfo -c Release -o "$(NupkgsDir)" /p:Version=$(Version)' />
+  </Target>
+
+  <Target Name="Test">
+    <Exec Command='dotnet test -v n' WorkingDirectory="test" IgnoreStandardErrorWarningFormat="true" />
+  </Target>
+
+  <Target Name="VSTest" DependsOnTargets="Test" />
+
+</Project>

build.cmd

@@ -3,7 +3,6 @@
   <packageSources>
     <clear />
     <add key="nuget-org" value="https://api.nuget.org/v3/index.json" />
-    <add key="netcorecli dev feed" value="https://www.myget.org/F/netcorecli-fsc/api/v3/index.json" />
     <add key="dotnet-proj-info dev feed" value="https://www.myget.org/F/dotnet-proj-info/api/v3/index.json" />
   </packageSources>
 </configuration>