Release 2.1

appveyor.yml

@@ -1,13 +1,10 @@
 version: '{build}'
 skip_tags: true
-image: Visual Studio 2015
+image: Visual Studio 2017
 configuration: Release
 install:
   - ps: mkdir -Force ".\build\" | Out-Null
-  - ps: Invoke-WebRequest "https://raw.githubusercontent.com/dotnet/cli/rel/1.0.0-preview2/scripts/obtain/dotnet-install.ps1" -OutFile ".\build\installcli.ps1"
-  - ps: $env:DOTNET_INSTALL_DIR = "$pwd\.dotnetcli"
-  - ps: '& .\build\installcli.ps1 -InstallDir "$env:DOTNET_INSTALL_DIR" -NoPath -Version 1.0.0-preview2-003121'
-  - ps: $env:Path = "$env:DOTNET_INSTALL_DIR;$env:Path"
+
 build_script:
 - ps: ./Build.ps1
 test: off
@@ -16,7 +13,7 @@ artifacts:
 deploy:
 - provider: NuGet
   api_key:
-    secure: nvZ/z+pMS91b3kG4DgfES5AcmwwGoBYQxr9kp4XiJHj25SAlgdIxFx++1N0lFH2x
+    secure: bd9z4P73oltOXudAjPehwp9iDKsPtC+HbgshOrSgoyQKr5xVK+bxJQngrDJkHdY8
   skip_symbols: true
   on:
     branch: /^(master|dev)$/

serilog-enrichers-environment.sln

@@ -1,24 +1,23 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25123.0
+# Visual Studio 15
+VisualStudioVersion = 15.0.26430.14
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{037440DE-440B-4129-9F7A-09B42D00397E}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "assets", "assets", "{E9D1B5E1-DEB9-4A04-8BAB-24EC7240ADAF}"
 	ProjectSection(SolutionItems) = preProject
 		Build.ps1 = Build.ps1
-		global.json = global.json
 		NuGet.Config = NuGet.Config
 		README.md = README.md
 		assets\Serilog.snk = assets\Serilog.snk
 	EndProjectSection
 EndProject
-Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Serilog.Enrichers.Environment", "src\Serilog.Enrichers.Environment\Serilog.Enrichers.Environment.xproj", "{B884782D-6C07-4779-9074-D97F622799A9}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "test", "test", "{406006F7-12FA-4A8A-ADC8-80E5338F5275}"
 EndProject
-Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Serilog.Enrichers.Environment.Tests", "test\Serilog.Enrichers.Environment.Tests\Serilog.Enrichers.Environment.Tests.xproj", "{3C2D8E01-5580-426A-BDD9-EC59CD98E618}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Serilog.Enrichers.Environment", "src\Serilog.Enrichers.Environment\Serilog.Enrichers.Environment.csproj", "{B884782D-6C07-4779-9074-D97F622799A9}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Serilog.Enrichers.Environment.Tests", "test\Serilog.Enrichers.Environment.Tests\Serilog.Enrichers.Environment.Tests.csproj", "{3C2D8E01-5580-426A-BDD9-EC59CD98E618}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

src/Serilog.Enrichers.Environment/Enrichers/MachineNameEnricher.cs

@@ -1,4 +1,4 @@
-// Copyright 2013-2016 Serilog Contributors
+// Copyright 2013-2018 Serilog Contributors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,12 +11,15 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
 
 using System;
 using Serilog.Core;
 using Serilog.Events;
-using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+#if NETSTANDARD1_3
+using System.Net;
+#endif
 
 namespace Serilog.Enrichers
 {
@@ -39,16 +42,29 @@ public class MachineNameEnricher : ILogEventEnricher
         /// <param name="propertyFactory">Factory for creating new properties to add to the event.</param>
         public void Enrich(LogEvent logEvent, ILogEventPropertyFactory propertyFactory)
         {
-#if ENV_USER_NAME
-            _cachedProperty = _cachedProperty ?? propertyFactory.CreateProperty(MachineNamePropertyName, Environment.MachineName);
-#else
-            var machineName = Environment.GetEnvironmentVariable("COMPUTERNAME");
-            if (string.IsNullOrWhiteSpace(machineName))
-                machineName = Environment.GetEnvironmentVariable("HOSTNAME");
+            logEvent.AddPropertyIfAbsent(GetLogEventProperty(propertyFactory));
+        }
+
+        private LogEventProperty GetLogEventProperty(ILogEventPropertyFactory propertyFactory)
+        {
+            // Don't care about thread-safety, in the worst case the field gets overwritten and one
+            // property will be GCed
+            if (_cachedProperty == null)
+                _cachedProperty = CreateProperty(propertyFactory);
+
+            return _cachedProperty;
+        }
 
-            _cachedProperty = _cachedProperty ?? propertyFactory.CreateProperty(MachineNamePropertyName, machineName);
+        // Qualify as uncommon-path
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        private static LogEventProperty CreateProperty(ILogEventPropertyFactory propertyFactory)
+        {
+#if NETSTANDARD1_3
+            var machineName = Dns.GetHostName();
+#else
+            var machineName = Environment.MachineName;
 #endif
-            logEvent.AddPropertyIfAbsent(_cachedProperty);
+            return propertyFactory.CreateProperty(MachineNamePropertyName, machineName);
         }
     }
-} 
+}

src/Serilog.Enrichers.Environment/Serilog.Enrichers.Environment.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <Description>Enrich Serilog log events with properties from System.Environment.</Description>
+    <VersionPrefix>2.1.3</VersionPrefix>
+    <Authors>Serilog Contributors</Authors>
+    <TargetFrameworks>net45;netstandard1.3;netstandard1.5</TargetFrameworks>
+    <AssemblyName>Serilog.Enrichers.Environment</AssemblyName>
+    <AssemblyOriginatorKeyFile>../../assets/Serilog.snk</AssemblyOriginatorKeyFile>
+    <SignAssembly>true</SignAssembly>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+    <PackageId>Serilog.Enrichers.Environment</PackageId>
+    <PackageTags>serilog;machine;enricher</PackageTags>
+    <PackageIconUrl>http://serilog.net/images/serilog-enricher-nuget.png</PackageIconUrl>
+    <PackageProjectUrl>http://serilog.net</PackageProjectUrl>
+    <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
+    <RepositoryUrl>https://github.com/serilog/serilog-enrichers-environment</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+    <GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Serilog" Version="2.3.0" />
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">
+    <Reference Include="System" />
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.3' ">
+    <PackageReference Include="System.Net.NameResolution" Version="4.3.0" />
+  </ItemGroup>
+
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'net45' ">
+    <DefineConstants>$(DefineConstants);ENV_USER_NAME</DefineConstants>
+  </PropertyGroup>
+
+</Project>

test/Serilog.Enrichers.Environment.Tests/Serilog.Enrichers.Environment.Tests.csproj

@@ -0,0 +1,38 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netcoreapp1.0;net46</TargetFrameworks>
+    <AssemblyName>Serilog.Enrichers.Environment.Tests</AssemblyName>
+    <AssemblyOriginatorKeyFile>../../assets/Serilog.snk</AssemblyOriginatorKeyFile>
+    <SignAssembly>true</SignAssembly>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+    <PackageId>Serilog.Enrichers.Environment.Tests</PackageId>
+    <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
+    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">$(PackageTargetFallback);dnxcore50;portable-net45+win8</PackageTargetFallback>
+    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp1.0' ">1.0.4</RuntimeFrameworkVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Serilog.Enrichers.Environment\Serilog.Enrichers.Environment.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0-preview-20170106-08" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0-beta5-build1225" />
+    <PackageReference Include="xunit" Version="2.2.0-beta5-build3474" />
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net46' ">
+    <Reference Include="System" />
+    <Reference Include="Microsoft.CSharp" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
+
+</Project>