[mono] Linux build fixes (#128)

* [mono] Fix casing for `DotNet*` to be consistent and match the file on

.. disk.

* [mono] Remove Microsoft.DotNet.MSBuildSdkResolver on linux for the

.. bootstrap build. This is because it depends on a native lib,
libhostfxr*, which is not present in the bootrap msbuild, which breaks
the resolver and thus the build. Removing this should be fine, because
msbuild then just falls back to the bundled SDKs.

* [mono] Run the dotnet-install.sh script with `bash` instead of `sh` as

.. it breaks for `set -o pipefail` on ubuntu 16.04 .

* [mono] Skip copying the native lib, libhostfxr* for Linux

.. because this might or might not work on whatever distribution we are
actually building on.

* [mono] Sort both canonical and new files list, as the order can differ

.. between linux and macOS.

eng/cibuild_bootstrapped_msbuild.sh

@@ -57,6 +57,11 @@ function DownloadMSBuildForMono {
     # rename just to make it obvious when reading logs!
     mv $artifacts_dir/msbuild $mono_msbuild_dir
     chmod +x $artifacts_dir/mono-msbuild/MSBuild.dll
+
+    if [[ `uname -s` != 'Darwin' ]]; then
+        # with no .so available, this ends up breaking the build
+        rm -Rf $mono_msbuild_dir/SdkResolvers/Microsoft.DotNet.MSBuildSdkResolver
+    fi
     rm "$msbuild_zip"
   fi
 }

mono/build/extract_and_copy_hostfxr.sh

@@ -44,7 +44,7 @@ OLDCWD=`pwd`
 cd $TMPDIR
 
 GetDotNetInstallScript $TMPDIR
-sh ./dotnet-install.sh --version $1 --install-dir $DOTNET_DIR --architecture x64 --runtime dotnet --skip-non-versioned-files
+bash ./dotnet-install.sh --version $1 --install-dir $DOTNET_DIR --architecture x64 --runtime dotnet --skip-non-versioned-files
 find $DOTNET_DIR -name libhostfxr.dylib | xargs -I {} cp -v {} $DESTDIR
 
 cd $OLDCWD

mono/build/install.proj

@@ -182,11 +182,11 @@
         <Exec
             Condition="Exists('$(AllInstalledFiles_FileCanonical)')"
             IgnoreExitCode="$(IgnoreDiffFailure)"
-            Command="sort -o $(AllInstalledFiles_File) $(AllInstalledFiles_File) ; diff -u $(AllInstalledFiles_FileCanonical) $(AllInstalledFiles_File)" />
+            Command="sort -o $(AllInstalledFiles_FileCanonical) $(AllInstalledFiles_FileCanonical) ; sort -o $(AllInstalledFiles_File) $(AllInstalledFiles_File) ; diff -u $(AllInstalledFiles_FileCanonical) $(AllInstalledFiles_File)" />
 
         <Exec
             Condition="Exists('$(RemainingFiles_FileCanonical)')"
             IgnoreExitCode="$(IgnoreDiffFailure)"
-            Command="sort -o $(RemainingFiles_File) $(RemainingFiles_File); diff -u $(RemainingFiles_FileCanonical) $(RemainingFiles_File)" />
+            Command="sort -o $(RemainingFiles_FileCanonical) $(RemainingFiles_FileCanonical) ; sort -o $(RemainingFiles_File) $(RemainingFiles_File); diff -u $(RemainingFiles_FileCanonical) $(RemainingFiles_File)" />
     </Target>
 </Project>

mono/build/sdks_and_nugets/dotnet_resolver.proj

@@ -8,7 +8,7 @@
 		<ItemGroup>
 			<FilesToCopy
                 Include="$(DependencyNuPkgPath)/lib/net472/**"
-                OutputDirectory="$(DotnetSdkResolverDir)" />
+                OutputDirectory="$(DotNetSdkResolverDir)" />
 
 		</ItemGroup>
     </Target>

mono/build/sdks_and_nugets/update_sdks_and_nugets.proj

@@ -1,6 +1,6 @@
 <Project DefaultTargets="DeploySdksAndNuGets">
     <Import Project="$(MSBuildThisFileDirectory)\..\common.props" />
-    <Import Project="$(MSBuildThisFileDirectory)\..\DotnetBitsVersions.props" />
+    <Import Project="$(MSBuildThisFileDirectory)\..\DotNetBitsVersions.props" />
 
     <PropertyGroup>
         <HostOSName Condition="'$(HostOSName)' == ''">osx</HostOSName>
@@ -51,7 +51,7 @@
                     DependencyPackageName=Microsoft.DotNet.MSBuildSdkResolver;
                     DependencyPackageVersion=$(MicrosoftDotNetMSBuildSdkResolverVersion);
                     NuGetPackagesDir=$(NuGetPackagesDir);
-                    DotnetSdkResolverDir=$(MSBuildSdkResolverOutDir)
+                    DotNetSdkResolverDir=$(MSBuildSdkResolverOutDir)
                 </Properties>
             </NuGetsToBundle>
         </ItemGroup>
@@ -63,6 +63,9 @@
             Targets="Restore;Build"
             Properties="OutputDirectory=$(DotNetOverlayDirectory)\nuget-support\msbuild-bin"/>
 
-        <Exec Command="$(MSBuildThisFileDirectory)/../extract_and_copy_hostfxr.sh $(DotNetSdkVersionForLibHostFxr) $(MSBuildSdkResolverOutDir)" />
+        <!-- Ignoring the .so for linux, because it works on a smaller set of distributions -->
+        <Exec
+            Condition="'$([MSBuild]::IsOSPlatform(OSX))'"
+            Command="$(MSBuildThisFileDirectory)/../extract_and_copy_hostfxr.sh $(DotNetSdkVersionForLibHostFxr) $(MSBuildSdkResolverOutDir)" />
     </Target>
 </Project>

mono/build/update_bundled_bits.proj

@@ -1,5 +1,5 @@
 <Project DefaultTargets="FetchAndUpdateSdksAndNuGets">
-    <Import Project="$(MSBuildThisFileDirectory)\DotnetBitsVersions.props" />
+    <Import Project="$(MSBuildThisFileDirectory)\DotNetBitsVersions.props" />
 
     <Target Name="Build" DependsOnTargets="FetchAndUpdateSdksAndNuGets" />