diff --git a/internal/load/load.go b/internal/load/load.go
new file mode 100644
index 0000000..6083328
--- /dev/null
+++ b/internal/load/load.go
@@ -0,0 +1,49 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package load
+
+import (
+	"fmt"
+	"go/build"
+	"strings"
+
+	"golang.org/x/tools/go/packages"
+)
+
+// DefaultConfig returns a packages.Config suitable for LoadPackages.
+func DefaultConfig() *packages.Config {
+	return &packages.Config{
+		Mode: packages.NeedName | packages.NeedImports | packages.NeedTypes |
+			packages.NeedSyntax | packages.NeedTypesInfo | packages.NeedDeps |
+			packages.NeedModule,
+		Tests:      false,
+		BuildFlags: []string{fmt.Sprintf("-tags=%s", strings.Join(build.Default.BuildTags, ","))},
+	}
+}
+
+// Packages loads Go packages from source.
+// In addition to the packages, it returns all errors from loading the packages.
+// If the third return value is non-nil, that indicates a problem performing the load itself,
+// not a problem with the code being loaded.
+func Packages(cfg *packages.Config, patterns ...string) ([]*packages.Package, []error, error) {
+	pkgs, err := packages.Load(cfg, patterns...)
+	if err != nil {
+		return nil, nil, err
+	}
+	var errors []error
+	packages.Visit(pkgs, nil, func(pkg *packages.Package) {
+		for _, err := range pkg.Errors {
+			errors = append(errors, err)
+		}
+	})
+	// Truncate the list of errors. Sometimes the full list is so large that the BigQuery
+	// upload payload exceeds the maximum size. And even when that doesn't happen, more
+	// than a few errors is just a waste of space.
+	const maxErrors = 20
+	if len(errors) > maxErrors {
+		errors = append(errors[:maxErrors], fmt.Errorf("... and %d more errors", len(errors)-maxErrors))
+	}
+	return pkgs, errors, nil
+}