csproj file contains project properties which I'd like to use in CI/CD pipeline.
Is it possible to extract those values with dotnet cli (or some other standard tool) without parsing xml via some standalone script?
For example having the project:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<Version>1.0.0</Version>
<GenerateDocumentationFile>true</GenerateDocumentationFile>
</PropertyGroup>
</<Project>
I need to resolve the value of <Version>.
It's also wroth noting that project may contain conditional elements, and ideally it would be nice to resolve properties in the context of predefined variables.
MSBuild is very extensible. You could use a target to write the version number to a file:
<Target Name="WriteVersion" AfterTargets="Build">
<WriteLinesToFile Lines="$(Version)"
File="$(IntermediateOutputPath)version.txt" />
</Target>
That would write a version.txt file to a folder such as obj/Debug/net5.0 (depending on the Configuration and TargetFramework).
Also be sure to check out https://msbuildlog.com/ for how to investigate / debug builds.
Related
I have a file named Common.targets defined like so:
<Project>
<PropertyGroup>
<TlbExpPath>"c:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\x64\tlbexp"</TlbExpPath>
<TlbOutPath>"$(OutDir)..\TLB\$(TargetName).tlb"</TlbOutPath>
</PropertyGroup>
<Target Name="TlbExp" AfterTargets="CopyFilesToOutputDirectory" Inputs="$(TargetPath)" Outputs="$(TlbOutPath)">
<Exec Command='$(TlbExpPath) "$(TargetPath)" /nologo /win64 /out:$(TlbOutPath) /verbose' />
</Target>
</Project>
When I inspect the output of the TlbOutPath property, it looks like:
"..\TLB\.tlb"
Apparently, $(OutDir) and $(TargetName) produce nothing when used within a PropertyGroup. I'm not sure why. How can I make these paths/values reusable while still having access to built-in properties when they are defined?
I'm using MSBuild that comes bundled with Visual Studio 2019. I add an Import element to my actual .csproj projects to include this target where I need it. The csproj projects use the SDK format for the projects, e.g. <Project Sdk="Microsoft.NET.Sdk">.
Here is an example of what the import looks like:
<Project Sdk="Microsoft.NET.Sdk">
<!-- etc -->
<ItemGroup>
<Reference Include="Microsoft.CSharp" />
<!-- etc -->
</ItemGroup>
<Import Project="$(RepositoryRoot)\Common.targets" />
</Project>
MSBuild: How may I access built-in properties while defining my own
custom properties?
This is quite an issue in the new sdk format project. I have tested it and got the same issue as you said which quite bother me a lot. Like $(OutDir),$(TargetName),$(OutputPath),$(TargetPath) and some other common system properties cannot be used in a new property while $(Configuration) and $(AssemblyName) works well.
And not only us but also someone else also face the same issue about it.See this thread.
For the traditional old csproj format project, there was no problem with these properties being used this way, but in the new SDK format project, it is impossible to assign some common properties such as $(OutDir),$(TargetName) and $(TargetPath) to a new property. As we know, most of the common properties are defined in the Microsoft.Common.props file(old csproj format) which is quite different from the new sdk format project which does not have such file.
In order to get an answer,l have reported this issue to DC Forum. See this.You can enter this link and add any detailed comments to describe this issue. And anyone who interested in this issue will also vote it so that it will get more Microsoft staff's attention. All these efforts will speed up and get the final answer.
This process may take a while or you could try my suggestion.
Suggestion
1) You can customize this property $(OutDir) in Common.targets file, and use $(TargetFramework) instead of $(TargetName) since $(TargetFramework) is defined in the xxxx.csproj file.
<Project>
<PropertyGroup>
<OutDir>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName)\</OutDir>
<TlbExpPath>"c:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.6.1 Tools\x64\tlbexp"</TlbExpPath>
<TlbOutPath>"$(OutDir)..\TLB\$(TargetName).tlb"</TlbOutPath>
<TargetPath>xxxx\xxxx.dll(exe)</TargetPath>--------the absolute path of the output file
</PropertyGroup>
<Target Name="TlbExp" AfterTargets="CopyFilesToOutputDirectory" Inputs="$(TargetPath)" Outputs="$(TlbOutPath)">
<Exec Command='$(TlbExpPath) "$(TargetPath)" /nologo /win64 /out:$(TlbOutPath) /verbose' />
</Target>
</Project>
2) use Directory.Build.targets file rather than a custom targets file.
A) You should add a file named Directory.Build.targets(it must be named this and have its own rule to be imported into xxx.csproj) under the project folder.
B) add the content of Common.targets into it without any changes and then build your project directly. The Directory.Build.targets will be imported into your project automatically while build.
This function works well and will not lose any properties. However, l stil bother why it works.
Conclusion
I think #2 is more suitable and easier for you to achieve your goal.
New msbuild csproj format have got integrated nuget commands. It's possible to change default path where project assets will be restored by using <RestoreOutputPath>obj\profile7</RestoreOutputPath> command in project file.
But if I add <RestoreOutputPath>obj\profile7</RestoreOutputPath> to csproj file consequent commands
dotnet restore myproj.sln
dotnet build myproj.sln
produce build errors
obj\project.assets.json' not found. Run a NuGet package restore to generate this file.
How to tell MSBuild to get nuget assets from this obj\Profile7 path during the build command?
The restore output path needs to be the same as MSBuildProjectExtensionsPath so that the nuget generated props and targets files will be imported by the common props and targets. as well as BaseIntermediateOutputPath will be the default for composing the path to ProjectAssetsFile.
At least for the NuGet imports, it is important that MSBuildProjectExtensionsPath or BaseIntermediateOutputPath is set before the SDK props file is imported.
The simplest way to solve all of these issues is to set BaseIntermediateOutputPath very early in the project so that all components will take its value as a default base path - this is essentially redirecting obj to somewhere else.
This conflicts with the <Project SDK="..."> syntax since there is no way to set properties before the SDK's props file. To work around this, the project can be changed like this:
<Project>
<!-- This needs to be set before Sdk.props -->
<PropertyGroup>
<BaseIntermediateOutputPath>obj\SomeSubDir\</BaseIntermediateOutputPath>
</PropertyGroup>
<Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp1.1</TargetFramework>
</PropertyGroup>
<!-- other content -->
<Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
</Project>
An alternative would be to create a Directory.Build.props file that will be automatically imported early enough, but this would apply the value to all projects in the directory and take away the ability to specify the value per project.
I need project to be built into folder:
\bin\Debug 1.0.3.4
Where 1.0.3.4 is a current building assembly version specified in assembly: AssemblyVersion attribute.
I tried using different variables like $(AssemblyVersion), GetAssemblyIdentity task but had no luck.. I'm not so good at using MSBuild.
A quick and dirty solution to this is to, after the build, use GetAssemblyIdentity to extract the version info and then move the $(TargetFile) to the appropriate directory.
This assumes you don't have any dependencies going on. Otherwise, you'll need to modify the $(TargetPath), $(TargetName), and $(TargetExt) or go with the "proper" way of doing it - modifying $(OutputPath) dynamically.
<Target Name="AfterBuild" AfterTargets="Build">
<GetAssemblyIdentity AssemblyFiles="$(TargetPath)">
<Output TaskParameter="Assemblies" ItemName="AssemblyIdentity"/>
</GetAssemblyIdentity>
<PropertyGroup>
<Version>#(AssemblyIdentity->'%(Version)')</Version>
</PropertyGroup>
<Copy SourceFiles="$(TargetPath)" DestinationFolder="$(OutDir)$(Version)" />
</Target>
The proper way would be to modify $(OutDir) aka $(OutputPath), but that would involve things like modifying the AssemblyVersion.cs file (or more complexly, a copy of it injected automatically into the build chain).
You could also instead parse the version from the AssemblyVersion.cs file.
Solution1.sln contains two projects:
ProjectA.csproj
ProjectB.csproj
ProjectB has a custom target called "Foo". I want to run:
msbuild Solution1.sln /t:Foo
This will fail because ProjectA doesn't define the "Foo" target.
Is there a way to make the solution ignore the missing target? (E.g., do nothing if the target doesn't exist for a specific project) without modifying the SLN or project files?
There is a two-part solution if you don't want to edit the solution or project files and you're happy for it to work from MSBuild command-line but not from Visual Studio.
Firstly, the error you get when you run:
MSBuild Solution1.sln /t:Foo
Is not that ProjectA does not contain a Foo target but that the solution itself does not contain a Foo target. As #Jaykul suggests, setting the MSBuildEmitSolution environment variable will reveal the default targets contained within the solution metaproj.
Using the metaproj as inspiration you can introduce a new file "before.Solution1.sln.targets" next to the solution file (the file name pattern is important) with contents like this:
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Target Name="Foo">
<MSBuild Projects="#(ProjectReference)" Targets="Foo" BuildInParallel="True" Properties="CurrentSolutionConfigurationContents=$(CurrentSolutionConfigurationContents); SolutionDir=$(SolutionDir); SolutionExt=$(SolutionExt); SolutionFileName=$(SolutionFileName); SolutionName=$(SolutionName); SolutionPath=$(SolutionPath)" SkipNonexistentProjects="%(ProjectReference.SkipNonexistentProjects)" />
</Target>
</Project>
The MSBuild element is mostly just copied from the solution metaproj's Publish target. Adjust the target name and any other details to suit your scenario.
With this file in place, you'll now get the error that ProjectA does not contain the Foo target. ProjectB may or may not build anyway depending on inter-project dependencies.
So, secondly, to solve this problem we need to give every project an empty Foo target which is then overridden in projects that actually already contain one.
We do this by introducing another file, eg "EmptyFoo.targets" (name not important) that looks like this:
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Target Name="Foo" />
</Project>
And then we get every project to automatically import this targets file either by running MSBuild with an extra property, eg:
MSBuild Solution1.sln /t:Foo /p:CustomBeforeMicrosoftCommonTargets=c:\full_path_to\EmptyFoo.targets
Or include the CustomerBeforeMicrosoftCommonTargets property in the Properties attribute on the MSBuild element in the first targets file where you could optionally specify the full path relative to the $(SolutionDir) property.
However, if you're willing to run Foo in conjunction with any of the default solution targets (ie Build, Rebuild, Clean, or Publish) you could take some inspiration for how the Web Publishing Pipeline in MSBuild uses the DeployOnBuild property to call the Publish target on Web projects in a solution containing other project types that don't support publishing.
More info on the before.Solution1.sln.targets file here:
http://sedodream.com/2010/10/22/MSBuildExtendingTheSolutionBuild.aspx
You can target those by project name, like /t:project:target (might need quotes, I can't remember).
You can find all the generated targets by setting the environment variable MSBuildEmitSolution = 1 ... which causes msbuild to save to disk the temp .metaproj file which it generates for your solution. That file has all those targets defined in it, just open it up and take a look ;)
Maybe not the best answer but a reasonable hack.
msbuild ProjectA.csproj
msbuild ProjectB.csproj /t:Foo
When msbuild building solution - msbuild emits only limited set of targets into it's .metaproj file, and afaik - you can't build custom target through building sln file, you have to use original project1.csproj or custom build script.
Just for reference:
Use ContinueOnError when using MSBuildTask or -p:ContinueOnError=ErrorAndContinue when using (dotnet) msbuild
It may be in limited scenarios helpful: For example you have a list of .csproj files and want attach metadata only to specific project file items then you could write something like this:
<Target Name="UniqueTargetName" Condition="'$(PackAsExecutable)' == 'Package' Or '$(PackAsExecutable)' == 'Publish'" Outputs="#(_Hello)">
<ItemGroup>
<_Hello Include="$(MSBuildProjectFullPath)" />
</ItemGroup>
</Target>
<Target Name="BuildEachTargetFramework" DependsOnTargets="_GetTargetFrameworksOutput;AssignProjectConfiguration;_SplitProjectReferencesByFileExistence"
Condition="$(ExecutableProjectFullPath) != ''">
<Message Text="[$(MSBuildThisFilename)] Target BuildEachTargetFramework %(_MSBuildProjectReferenceExistent.Identity)" Importance="high" />
<MSBuild
Projects="%(ProjectReferenceWithConfiguration.Identity)"
Targets="UniqueTargetName"
ContinueOnError="true">
<Output TaskParameter="TargetOutputs" ItemName="_Hallo2" />
</MSBuild>
<Message Text="[$(MSBuildThisFilename)] ########### HELLO %(_Hallo2.Identity)" Importance="high" />
</Target>
I have a .wdproj Web Deployment Project created with VS2010 that contains references to other class libraries, like this:
<Project ToolsVersion="4.0" DefaultTargets="Build"
xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ProjectReference Include="..\Path\Proj1.csproj">
<Project>{GUID-HERE}</Project>
<Name>Proj1</Name>
</ProjectReference>
<ProjectReference Include="..\Path\Proj2.csproj">
<Project>{GUID-HERE}</Project>
<Name>Proj2</Name>
</ProjectReference>
There are lots of these. I want to be able to run msbuild /t:Rebuild /p:Configuration=Release and have all the assemblies of all the included projects compiled at a specified version. Nothing fancy just static like 2.5.6.0 and specified once in the wdproj file. I dont want to open 30 files manually.
I have looked at MSBuild Community Task and MSBuildExtension Pack and can not get anything to work. The build runs ok without errors.
Anyone have an example of how this can be done?
This is an attempt with MSBuild Extensions (adapted from the sample included) that doesn't work:
<Import Project="$(MSBuildExtensionsPath)\ExtensionPack\4.0\MSBuild.ExtensionPack.VersionNumber.targets"/>
<Target Name="Build">
<MSBuild.ExtensionPack.Framework.AssemblyInfo
ComVisible="true"
AssemblyInfoFiles="VersionInfo.cs"
AssemblyFileMajorVersion="2"
AssemblyFileMinorVersion="5"
AssemblyFileBuildNumber="6"
AssemblyFileRevision="0"
/>
</Target>
MSBuild is definately looking at the MSBuild.ExtensionPack.Framework.AssemblyInfo element because if the attribute names are incorrect the build will fail. This builds ok but none of the versions on the referenced assemblies are changed. The version numbers on the ASP.NET page assemblies from the website are all 0.0.0.0.
Are you maybe missing to specify the CodeLanguage and OutputFile attributes?
I think the AssemblyInfo task is intended to generate (replace) a source file prior to compiling.