fix(installer): resolve Windows source script paths

Optimum.Bootstrap.Core.Tests/BuildLayerTests.cs

@@ -201,3 +201,36 @@ public async Task AnUnspawnableStepExecutableFailsTheBuildInsteadOfHangingTheWiz
         }
     }
 }
+
+public class ScriptBuildDriverWindowsCommandTests
+{
+    [Fact]
+    public void BootstrapCommandUsesAnAbsoluteScriptPathFromTheSourceRoot()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        string repo = Path.Combine(Path.GetTempPath(), "optimum-source");
+        BuildRequest request = new(repo, Path.Combine(Path.GetTempPath(), "optimum-output"));
+
+        var command = new ScriptBuildDriver(probe).BootstrapCommand(request);
+
+        Assert.Equal("-File", command.Args[0]);
+        Assert.Equal(Path.GetFullPath(Path.Combine(repo, "scripts", "bootstrap.ps1")), command.Args[1]);
+        Assert.True(Path.IsPathFullyQualified(command.Args[1]));
+    }
+
+    [Fact]
+    public void PackageCommandUsesAnAbsoluteScriptPathFromTheSourceRoot()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        string repo = Path.Combine(Path.GetTempPath(), "optimum-source");
+        string output = Path.Combine(Path.GetTempPath(), "optimum-output");
+        BuildRequest request = new(repo, output);
+
+        var command = new ScriptBuildDriver(probe).PackageCommand(request);
+
+        Assert.Equal("-File", command.Args[0]);
+        Assert.Equal(Path.GetFullPath(Path.Combine(repo, "scripts", "package.ps1")), command.Args[1]);
+        Assert.True(Path.IsPathFullyQualified(command.Args[1]));
+        Assert.Equal(output, command.Args[3]);
+    }
+}

Optimum.Bootstrap.Core.Tests/SourceAcquisitionTests.cs

@@ -7,6 +7,46 @@ namespace Optimum.Bootstrap.Core.Tests;
 
 public class SourceCacheTests
 {
+    [Fact]
+    public void WindowsCacheWithoutScriptsIsNotUsable()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/cache/forks.json");
+
+        Assert.False(SourceCache.IsUsableCheckout(probe, "/cache"));
+    }
+
+    [Fact]
+    public void WindowsCacheWithOnlyUnixBootstrapScriptIsNotUsable()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/cache/forks.json");
+        probe.AddFile("/cache/scripts/bootstrap.sh");
+
+        Assert.False(SourceCache.IsUsableCheckout(probe, "/cache"));
+    }
+
+    [Fact]
+    public void WindowsCacheMissingPackagingScriptIsNotUsable()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/cache/forks.json");
+        probe.AddFile("/cache/scripts/bootstrap.ps1");
+
+        Assert.False(SourceCache.IsUsableCheckout(probe, "/cache"));
+    }
+
+    [Fact]
+    public void WindowsCacheWithBothRequiredScriptsIsUsable()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/cache/forks.json");
+        probe.AddFile("/cache/scripts/bootstrap.ps1");
+        probe.AddFile("/cache/scripts/package.ps1");
+
+        Assert.True(SourceCache.IsUsableCheckout(probe, "/cache"));
+    }
+
     [Theory]
     [InlineData("0.3.14", "v0.3.14")]
     [InlineData("1.0.0", "v1.0.0")]
@@ -75,6 +115,40 @@ public void CloneArgumentsOmitTheBranchWhenThereIsNoTag()
     }
 }
 
+public class RepoRootTests
+{
+    [Fact]
+    public void WindowsDiscoveryRejectsAUnixOnlyCheckout()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/repo/forks.json");
+        probe.AddFile("/repo/scripts/bootstrap.sh");
+
+        Assert.Null(RepoRoot.Discover(probe, "/repo"));
+    }
+
+    [Fact]
+    public void WindowsDiscoveryReturnsTheCheckoutWithBothPowerShellScripts()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.AddFile("/repo/forks.json");
+        probe.AddFile("/repo/scripts/bootstrap.ps1");
+        probe.AddFile("/repo/scripts/package.ps1");
+
+        Assert.Equal("/repo", RepoRoot.Discover(probe, "/repo"));
+    }
+
+    [Fact]
+    public void UnixDiscoveryKeepsItsExistingBootstrapShellContract()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Linux };
+        probe.AddFile("/repo/forks.json");
+        probe.AddFile("/repo/scripts/bootstrap.sh");
+
+        Assert.Equal("/repo", RepoRoot.Discover(probe, "/repo"));
+    }
+}
+
 public class GitSourceProviderTests
 {
     [Fact]
@@ -118,6 +192,41 @@ public async Task ReusesACachedCheckoutWithoutTouchingGit()
         Assert.Equal(cached, result.RepoRoot);
     }
 
+    [Fact]
+    public async Task DoesNotReuseAnIncompleteWindowsCheckout()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.Environment["LOCALAPPDATA"] = "/cache";
+        string cached = "/cache/optimum/src-v0.3.14";
+        probe.AddFile($"{cached}/forks.json");
+        probe.AddFile($"{cached}/scripts/bootstrap.sh");
+        // No Git on PATH: an incomplete cache must be rejected, not reused.
+
+        var result = await new GitSourceProvider(probe)
+            .EnsureAsync(new SourceRequest("0.3.14"), NullBuildObserver.Instance, CancellationToken.None);
+
+        Assert.False(result.Ok);
+        Assert.Equal(FailureReason.SourceUnavailable, result.Reason);
+    }
+
+    [Fact]
+    public async Task ReusesACompleteWindowsCheckoutFromTheSourceCache()
+    {
+        var probe = new FakeSystemProbe { Os = OsKind.Windows };
+        probe.Environment["LOCALAPPDATA"] = "/cache";
+        string cached = "/cache/optimum/src-v0.3.14";
+        probe.AddFile($"{cached}/forks.json");
+        probe.AddFile($"{cached}/scripts/bootstrap.ps1");
+        probe.AddFile($"{cached}/scripts/package.ps1");
+        // No Git on PATH: proves the complete cached source is the one used.
+
+        var result = await new GitSourceProvider(probe)
+            .EnsureAsync(new SourceRequest("0.3.14"), NullBuildObserver.Instance, CancellationToken.None);
+
+        Assert.True(result.Ok);
+        Assert.Equal(cached, result.RepoRoot);
+    }
+
     [Fact]
     public async Task FailsWithSourceUnavailableWhenGitIsMissing()
     {

Optimum.Bootstrap.Core/Build/RepoRoot.cs

@@ -4,9 +4,9 @@ namespace Optimum.Bootstrap.Core.Build;
 
 /// <summary>
 /// Finds the Optimum checkout the engine has to drive: the nearest directory at
-/// or above a starting point that holds <c>forks.json</c> next to
-/// <c>scripts/bootstrap.sh</c>. Both front ends need this because the build
-/// pipeline is still the shell scripts (INSTALLER-PLAN.md section 2).
+/// or above a starting point that holds the manifest and the scripts required
+/// by the probed platform. Both front ends need this because the build pipeline
+/// is still the platform scripts (INSTALLER-PLAN.md section 2).
 /// </summary>
 public static class RepoRoot
 {
@@ -18,8 +18,7 @@ public static class RepoRoot
 
         for (string? dir = start; dir is not null; dir = Path.GetDirectoryName(dir))
         {
-            if (probe.FileExists(Path.Combine(dir, "forks.json"))
-                && probe.FileExists(Path.Combine(dir, "scripts", "bootstrap.sh")))
+            if (SourceCache.IsUsableCheckout(probe, dir))
                 return dir;
         }
 

Optimum.Bootstrap.Core/Build/ScriptBuildDriver.cs

@@ -111,11 +111,11 @@ public async Task<BuildResult> RunAsync(
         }
     }
 
-    private (string Exe, IReadOnlyList<string> Args) BootstrapCommand(BuildRequest request)
+    internal (string Exe, IReadOnlyList<string> Args) BootstrapCommand(BuildRequest request)
     {
         if (probe.Os == OsKind.Windows)
         {
-            List<string> win = ["-File", "scripts/bootstrap.ps1"];
+            List<string> win = ["-File", ScriptPath(request.RepoRoot, "bootstrap.ps1")];
             if (request.ClientArchive is not null)
                 win.AddRange(["-ClientArchive", request.ClientArchive]);
             if (request.Version is not null)
@@ -131,13 +131,13 @@ public async Task<BuildResult> RunAsync(
         return ("bash", unix);
     }
 
-    private (string Exe, IReadOnlyList<string> Args) PackageCommand(BuildRequest request)
+    internal (string Exe, IReadOnlyList<string> Args) PackageCommand(BuildRequest request)
     {
         string output = request.OutputDirectory;
         switch (probe.Os)
         {
             case OsKind.Windows:
-                List<string> win = ["-File", "scripts/package.ps1", "-OutputDir", output];
+                List<string> win = ["-File", ScriptPath(request.RepoRoot, "package.ps1"), "-OutputDir", output];
                 if (request.ClientArchive is not null) win.AddRange(["-ClientArchive", request.ClientArchive]);
                 return (PwshExecutable(), win);
             case OsKind.MacOs:
@@ -154,6 +154,9 @@ public async Task<BuildResult> RunAsync(
         }
     }
 
+    private static string ScriptPath(string repoRoot, string scriptName) =>
+        Path.GetFullPath(Path.Combine(repoRoot, "scripts", scriptName));
+
     private string DotnetExecutable() => DotnetSdkProbe.Find(probe) ?? "dotnet";
 
     /// <summary>

Optimum.Bootstrap.Core/Build/SourceAcquisition.cs

@@ -87,10 +87,20 @@ internal static string SanitizeVersion(string version)
         return v.Length > 1 && v[0] == 'v' && char.IsDigit(v[1]) ? v : null;
     }
 
-    /// <summary>True when a directory holds the two files the pipeline needs.</summary>
-    public static bool IsUsableCheckout(ISystemProbe probe, string directory) =>
-        probe.FileExists(Path.Combine(directory, "forks.json"))
-        && probe.FileExists(Path.Combine(directory, "scripts", "bootstrap.sh"));
+    /// <summary>
+    /// True when a directory holds the manifest and the scripts required by the
+    /// platform's build and packaging pipeline.
+    /// </summary>
+    public static bool IsUsableCheckout(ISystemProbe probe, string directory)
+    {
+        if (!probe.FileExists(Path.Combine(directory, "forks.json")))
+            return false;
+
+        return probe.Os == OsKind.Windows
+            ? probe.FileExists(Path.Combine(directory, "scripts", "bootstrap.ps1"))
+                && probe.FileExists(Path.Combine(directory, "scripts", "package.ps1"))
+            : probe.FileExists(Path.Combine(directory, "scripts", "bootstrap.sh"));
+    }
 
     internal static IReadOnlyList<string> CloneArguments(string? tagRef, string targetDirectory)
     {