[IGNITE-10554] .NET: Jars are not copied to target dir under .NET Core

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4
• Fix Version/s: 2.8
• Component/s: platforms
• Labels: .NET
• Release Note: .NET Core 3.0 supported officially
• Ignite Flags: Release Notes Required
• Assignee: Pavel Tupitsyn
• Reporter: Pavel Tupitsyn
• Created: 05/Dec/18 15:22
• Updated: 06/Feb/21 14:05
• Resolved: 09/Oct/19 09:55

Description

We use PowerShell script to update post-build event in the target project and copy jar files to target directory during build.

However, this no longer works with .NET Core.
nuspec file should be updated with new format, see example from https://github.com/NuGet/Samples/blob/master/ContentFilesExample/authoring/ContentFilesExample.nuspec:

<?xml version="1.0"?>
<package>
  <metadata minClientVersion="3.3.0">
    <id>ContentFilesExample</id>
    <version>1.0.0</version>
    <authors>nuget</authors>
    <owners>nuget</owners>
    <requireLicenseAcceptance>false</requireLicenseAcceptance>
    <description>A content v2 example package.</description>
    <tags>contentv2 contentFiles</tags>
    <!-- Build actions for items in the contentFiles folder -->
    <contentFiles>
        <!-- Include Assets as Content -->
        <files include="**/images/*.*" buildAction="Content" />
        <files include="**/data.txt" buildAction="Content" />
        <!-- Copy tool scripts to the output folder -->
        <files include="**/tools/*" buildAction="None" flatten="false" copyToOutput="true" />
    </contentFiles>
  </metadata>
</package

UPDATE: this breaks NuGet package usage completely under .NET Core 3.0
NuGet behavior has changed in .NET Core 3.0:

The dotnet build command now copies NuGet dependencies for your application from the NuGet cache to the build output folder

In .NET Core 2.x dependencies are used directly from NuGet cache, so JAR files are resolved.
In 3.0 this does not work anymore, we should find a way to copy JAR files to the output folder.

Test cases:

• .NET 4.x
• .NET Core 2.x, 3.x Windows & Linux
• LINQPad
• Binary zip distribution (examples, .NET Core examples)

Issue Links

• is related to: IGNITE-10073 .NET: Add NuGet package without embedded Ignite JARs
• relates to: IGNITE-4980 .NET: NuGet packages do not work with PackageReference in VS2017
• links to: GitHub Pull Request #6954