Move shared checks into validation package

internal/validation/validation.go

@@ -0,0 +1,33 @@
+// Package validation owns the shared checks run against a captured candidate.
+package validation
+
+import (
+	"context"
+	"fmt"
+	"io"
+
+	"gitea.maximumdirect.net/eric/ReleaseKit/internal/gotool"
+)
+
+// Settings selects shared validation behavior. Its zero value runs the current
+// default Go suite.
+type Settings struct{}
+
+// Request identifies the captured source and output used by shared validation.
+type Request struct {
+	RepositoryDir string
+	Commit        string
+	Output        io.Writer
+	Settings      Settings
+}
+
+// Run executes shared validation for the captured candidate.
+func Run(ctx context.Context, request Request) error {
+	tool, err := gotool.New(ctx, request.RepositoryDir)
+	if err != nil {
+		return fmt.Errorf("prepare Go toolchain: %w", err)
+	}
+	_, err = tool.Run(ctx, request.RepositoryDir, gotool.Native, gotool.Target{}, request.Output,
+		"test", "-mod=readonly", "-count=1", "./...")
+	return err
+}