Capture module prerelease in module information

PowerForge.Tests/ModuleInformationReaderTests.cs

@@ -0,0 +1,59 @@
+using System.IO;
+
+namespace PowerForge.Tests;
+
+public sealed class ModuleInformationReaderTests
+{
+    [Fact]
+    public void Read_PrefersPrereleaseFromPsData()
+    {
+        var projectRoot = CreateModuleProject(
+            """
+            @{
+                RootModule = 'Sample.psm1'
+                ModuleVersion = '1.2.3'
+                PrivateData = @{
+                    PSData = @{
+                        Prerelease = 'preview1'
+                    }
+                }
+            }
+            """);
+
+        var reader = new ModuleInformationReader();
+
+        var result = reader.Read(projectRoot);
+
+        Assert.Equal("preview1", result.PreRelease);
+    }
+
+    [Fact]
+    public void Read_FallsBackToTopLevelPrerelease()
+    {
+        var projectRoot = CreateModuleProject(
+            """
+            @{
+                RootModule = 'Sample.psm1'
+                ModuleVersion = '1.2.3'
+                Prerelease = 'beta2'
+            }
+            """);
+
+        var reader = new ModuleInformationReader();
+
+        var result = reader.Read(projectRoot);
+
+        Assert.Equal("beta2", result.PreRelease);
+    }
+
+    private static string CreateModuleProject(string manifestContent)
+    {
+        var projectRoot = Path.Combine(Path.GetTempPath(), "PowerForgeModuleInformationTests", Path.GetRandomFileName());
+        Directory.CreateDirectory(projectRoot);
+
+        File.WriteAllText(Path.Combine(projectRoot, "Sample.psd1"), manifestContent);
+        File.WriteAllText(Path.Combine(projectRoot, "Sample.psm1"), string.Empty);
+
+        return projectRoot;
+    }
+}

PowerForge/Models/ModuleInformation.cs

@@ -19,6 +19,8 @@ public sealed class ModuleInformation
     public string? RootModule { get; }
     /// <summary>PowerShell version requirement from the manifest (PowerShellVersion).</summary>
     public string? PowerShellVersion { get; }
+    /// <summary>Prerelease label from the manifest when present.</summary>
+    public string? PreRelease { get; }
     /// <summary>GUID value from the manifest (GUID), when present and parseable.</summary>
     public Guid? Guid { get; }
     /// <summary>Typed RequiredModules entries extracted from the manifest.</summary>
@@ -36,6 +38,7 @@ public ModuleInformation(
         string? moduleVersion,
         string? rootModule,
         string? powerShellVersion,
+        string? preRelease,
         Guid? guid,
         RequiredModuleReference[] requiredModules,
         string? manifestText)
@@ -46,6 +49,7 @@ public ModuleInformation(
         ModuleVersion = moduleVersion;
         RootModule = rootModule;
         PowerShellVersion = powerShellVersion;
+        PreRelease = preRelease;
         Guid = guid;
         RequiredModules = requiredModules ?? Array.Empty<RequiredModuleReference>();
         ManifestText = manifestText;

PowerForge/Services/ModuleInformationReader.cs

@@ -40,6 +40,7 @@ public ModuleInformation Read(string projectPath)
         string? moduleVersion = null;
         string? rootModule = null;
         string? powerShellVersion = null;
+        string? preRelease = null;
         Guid? guid = null;
         RequiredModuleReference[] requiredModules = Array.Empty<RequiredModuleReference>();
         string? manifestText = null;
@@ -52,6 +53,15 @@ public ModuleInformation Read(string projectPath)
                 rootModule = rm;
             if (ManifestEditor.TryGetTopLevelString(manifestPath, "PowerShellVersion", out var psv))
                 powerShellVersion = psv;
+            if (ManifestEditor.TryGetPsDataStringArray(manifestPath, "Prerelease", out var prereleaseValues) &&
+                prereleaseValues is { Length: > 0 })
+            {
+                preRelease = prereleaseValues[0];
+            }
+            else if (ManifestEditor.TryGetTopLevelString(manifestPath, "Prerelease", out var topLevelPrerelease))
+            {
+                preRelease = topLevelPrerelease;
+            }
             if (ManifestEditor.TryGetTopLevelString(manifestPath, "GUID", out var guidString))
             {
                 if (System.Guid.TryParse(guidString, out var g))
@@ -82,6 +92,7 @@ public ModuleInformation Read(string projectPath)
             moduleVersion: moduleVersion,
             rootModule: rootModule,
             powerShellVersion: powerShellVersion,
+            preRelease: preRelease,
             guid: guid,
             requiredModules: requiredModules,
             manifestText: manifestText);