Improve build scripts (#146 closes #142, #143, #144, #145)

 - Restore NuGet packages on pack
 - Skip build on branches with an active PR
 - Make AppVeyor failing builds red
 - Make tag builds fail on no recent tag
 - Upgrade to latest .NET SDK

.travis.yml

@@ -4,13 +4,13 @@ matrix:
     - os: linux
       dist: trusty
       mono: latest
-      dotnet: 2.1.3
+      dotnet: 2.1.201
       sudo: required
       env: MONO_BASE_PATH=/usr/lib/mono/
     - os: osx
       osx_image: xcode9.2
       mono: latest
-      dotnet: 2.1.3
+      dotnet: 2.1.201
       sudo: required
       env: MONO_BASE_PATH=/Library/Frameworks/Mono.framework/Versions/Current/lib/mono/
 before_install:
@@ -20,13 +20,15 @@ before_install:
     fi
     DOTNET_INSTALL_DIR="$PWD/.dotnetsdk"
     curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --version "1.1.9" --install-dir "$DOTNET_INSTALL_DIR" --no-path
-    curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --version "2.1.200" --install-dir "$DOTNET_INSTALL_DIR" --no-path
+    curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --version "2.1.201" --install-dir "$DOTNET_INSTALL_DIR" --no-path
+    curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --version "2.1.301" --install-dir "$DOTNET_INSTALL_DIR" --no-path
     export PATH="$DOTNET_INSTALL_DIR:$PATH"
 script:
   - |
     mostRecentTag=$(git describe --abbrev=0 --tags --always)
     if [[ $mostRecentTag != v* ]]; then
         mostRecentTag='v1.0.0'
+        if [[ "${TRAVIS_TAG}" != "" ]]; then exit 1; fi
     fi
     mostRecentVersion=$(echo "$mostRecentTag" | cut -c 2-)
     FrameworkPathOverride=$MONO_BASE_PATH/4.5.2-api/ $(pwd)/tools/build.sh '--target=Test' "--softwareVersion=$mostRecentVersion" "--buildNumber=$TRAVIS_BUILD_NUMBER"

appveyor.yml

@@ -4,22 +4,26 @@ install:
   - ps: |
       $DOTNET_INSTALL_DIR = $(Join-Path (Get-Location) 'dotnetsdk')
       powershell -NoProfile -ExecutionPolicy Unrestricted -Command "&([scriptblock]::Create((Invoke-WebRequest -UseBasicParsing 'https://dot.net/v1/dotnet-install.ps1'))) -Version 1.1.9 -InstallDir $DOTNET_INSTALL_DIR -NoPath"
-      powershell -NoProfile -ExecutionPolicy Unrestricted -Command "&([scriptblock]::Create((Invoke-WebRequest -UseBasicParsing 'https://dot.net/v1/dotnet-install.ps1'))) -Version 2.1.200 -InstallDir $DOTNET_INSTALL_DIR -NoPath"
+      powershell -NoProfile -ExecutionPolicy Unrestricted -Command "&([scriptblock]::Create((Invoke-WebRequest -UseBasicParsing 'https://dot.net/v1/dotnet-install.ps1'))) -Version 2.1.201 -InstallDir $DOTNET_INSTALL_DIR -NoPath"
+      powershell -NoProfile -ExecutionPolicy Unrestricted -Command "&([scriptblock]::Create((Invoke-WebRequest -UseBasicParsing 'https://dot.net/v1/dotnet-install.ps1'))) -Version 2.1.301 -InstallDir $DOTNET_INSTALL_DIR -NoPath"
       $env:Path = "$DOTNET_INSTALL_DIR;$env:Path"
 before_build:
   - ps: |
       $mostRecentTag = git describe --abbrev=0 --tags --always
       if ($mostRecentTag.Substring(0, 1) -ne 'v') {
           $mostRecentTag = 'v1.0.0'
+          if ($env:APPVEYOR_REPO_TAG -eq 'true') { exit 1 }
       }
       $mostRecentVersion = $mostRecentTag.Substring(1)
       $currentCommitHash = git rev-parse --short HEAD
       Set-AppveyorBuildVariable -Name SW_VER -Value $mostRecentVersion
       Update-AppveyorBuild -Version "Build $env:APPVEYOR_BUILD_NUMBER - Commit $currentCommitHash - Tag v$env:SW_VER"
+skip_branch_with_pr: true
 build_script:
   - ps: |
       $additionalArgs = if ($env:APPVEYOR_REPO_TAG -ne 'true') { "--buildNumber=$env:APPVEYOR_BUILD_NUMBER" }
       .\tools\build.ps1 '--target=Pack' "--softwareVersion=$env:SW_VER" $additionalArgs
+      if ($LastExitCode -ne 0) { exit $LastExitCode }
 test: off
 artifacts:
   - path: tools\artifacts\*.nupkg

tools/build.cake

@@ -104,6 +104,25 @@ Task("Clean")
         }
     });
 
+Task("RestorePackages")
+    .Does(() =>
+    {
+        var toRestoreProjects = childDirInfos
+            .Except(toBuildDirInfo)
+            .SelectMany(x => x.GetFiles("*.csproj"))
+            .Select(x => x.FullName)
+            .ToList();
+
+        var deleteDirectorySettings = new DeleteDirectorySettings
+        {
+            Recursive = true,
+            Force = true
+        };
+
+        foreach (var projectToRestore in toRestoreProjects)
+            DotNetCoreRestore(projectToRestore);
+    });
+
 Task("Build")
     .IsDependentOn("MSBuildSettings")
     .Does(() =>
@@ -144,6 +163,7 @@ Task("Test")
     });
 
 Task("Pack")
+    .IsDependentOn("RestorePackages")
     .IsDependentOn("Test")
     .Does(() =>
     {