adjust defaultBenchmarkDotNetVersion on build (#1879)

* adjust defaultBenchmarkDotNetVersion on build

* fix https://github.com/dotnet/BenchmarkDotNet/pull/1879#discussion_r1250960415

* fix https://github.com/dotnet/BenchmarkDotNet/pull/1879#discussion_r1250961663

* fix https://github.com/dotnet/BenchmarkDotNet/pull/1879#discussion_r1250963754

* add install-from-source.sh (for macOS for example)

* fix copy paste

build/common.props

@@ -62,4 +62,28 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
   </ItemGroup>
+
+  <UsingTask TaskName="ReplaceFileText"
+             TaskFactory="RoslynCodeTaskFactory"
+             AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
+    <ParameterGroup>
+      <InputFilename ParameterType="System.String" Required="true" />
+      <OutputFilename ParameterType="System.String" Required="true" />
+      <MatchExpression ParameterType="System.String" Required="true" />
+      <ReplacementText ParameterType="System.String" Required="true" />
+    </ParameterGroup>
+    <Task>
+      <Using Namespace="System" />
+      <Using Namespace="System.IO" />
+      <Using Namespace="System.Text.RegularExpressions" />
+      <Code Type="Fragment" Language="cs">
+        <![CDATA[
+            File.WriteAllText(
+                OutputFilename,
+                Regex.Replace(File.ReadAllText(InputFilename), MatchExpression, ReplacementText)
+                );
+          ]]>
+      </Code>
+    </Task>
+  </UsingTask>
 </Project>

templates/BenchmarkDotNet.Templates.csproj

@@ -24,4 +24,25 @@
     <Compile Remove="**\*" />
     <None Remove="*.bat;.sh" />
   </ItemGroup>
+
+  <Target Name="Fix BenchmarkDotNetVersion"
+          BeforeTargets="Build">
+    <ReplaceFileText
+            InputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.CSharp/.template.config/template.json"
+            OutputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.CSharp/.template.config/template.json"
+            MatchExpression='("defaultValue": )"([\d+\.?]+)"'
+            ReplacementText='${1}"$(VersionPrefix)"' />
+
+    <ReplaceFileText
+            InputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.FSharp/.template.config/template.json"
+            OutputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.FSharp/.template.config/template.json"
+            MatchExpression='("defaultValue": )"([\d+\.?]+)"'
+            ReplacementText='${1}"$(VersionPrefix)"' />
+
+    <ReplaceFileText
+            InputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.VB/.template.config/template.json"
+            OutputFilename="templates/BenchmarkDotNet.BenchmarkProjectTemplate.VB/.template.config/template.json"
+            MatchExpression='("defaultValue": )"([\d+\.?]+)"'
+            ReplacementText='${1}"$(VersionPrefix)"' />
+  </Target>
 </Project>

templates/install-from-source.sh

@@ -0,0 +1,13 @@
+# Run only from the folder where the shell script is located!
+
+dotnet build BenchmarkDotNet.Templates.csproj -c Release
+dotnet pack BenchmarkDotNet.Templates.csproj -c Release
+
+#  If we install the templates via a folder path, then it will have a different ID (ID=folder path).
+#  It will conflict with BDN templates from nuget.
+#  We need to install the templates via a FILE path in order to update the template from nuget.
+
+nupkg_path=$(find . -name "BenchmarkDotNet.Templates*.nupkg")
+
+dotnet new uninstall "BenchmarkDotNet.Templates"
+dotnet new install $nupkg_path