case goVersion != "":
			fmt.Fprintf(w, "## go %s\n", goVersion)
		}

		pkgs := modpkgs[m]
		sort.Strings(pkgs)
		for _, pkg := range pkgs {
			fmt.Fprintf(w, "%s\n", pkg)
			vendorPkg(vdir, pkg)
		}
	}

	if includeAllReplacements {
		// Record unused and wildcard replacements at the end of the modules.txt file:
		// without access to the complete build list, the consumer of the vendor

		needUpdate = true
	}
	if len(addedVendored) > 0 {
		log.Printf("Unwanted modules are newly vendored: %q", addedVendored)
		log.Printf("!!! Avoid updates that increase vendoring of unwanted dependencies\n")
		needUpdate = true
	}

	if needUpdate {
		os.Exit(1)
	}
}

				return nil, fmt.Errorf("no package file for %q", path)
			}
			return os.Open(file)
		})
		return importerFunc(func(importPath string) (*types.Package, error) {
			path, ok := cfg.ImportMap[importPath] // resolve vendoring, etc
			if !ok {
				return nil, fmt.Errorf("can't resolve import %q", path)
			}
			return compilerImporter.Import(path)
		})
	}

	exportTypes = func(*Config, *token.FileSet, *types.Package) error {

	Import(path string) (*Package, error)
}

// ImportMode is reserved for future use.
type ImportMode int

// An ImporterFrom resolves import paths to packages; it
// supports vendoring per https://golang.org/s/go15vendor.
// Use go/importer to obtain an ImporterFrom implementation.
type ImporterFrom interface {
	// Importer is present for backward-compatibility. Calling

	Import(path string) (*Package, error)
}

// ImportMode is reserved for future use.
type ImportMode int

// An ImporterFrom resolves import paths to packages; it
// supports vendoring per https://golang.org/s/go15vendor.
// Use go/importer to obtain an ImporterFrom implementation.
type ImporterFrom interface {
	// Importer is present for backward-compatibility. Calling

so that the ImportPath uniquely identifies a given copy of a package.
The Imports, Deps, TestImports, and XTestImports lists also contain these
expanded import paths. See golang.org/s/go15vendor for more about vendoring.

The error information, if any, is

    type PackageError struct {
        ImportStack   []string // shortest path from package named on command line to this one

	// wrong package as complete. By using an "unclean" package path, the
	// file and package path are different, exposing the problem if present.
	// The same issue occurs with vendoring.)
	imports := make(map[string]*types.Package)
	fset := token.NewFileSet()
	for i := 0; i < 3; i++ {
		if _, err := Import(fset, imports, "./././testdata/p", tmpdir, nil); err != nil {
			t.Fatal(err)
		}
	}

Note, however, that a directory named vendor that itself contains code
is not a vendored package: cmd/vendor would be a command named vendor,
and the pattern cmd/... matches it.
See golang.org/s/go15vendor for more about vendoring.

An import path can also name a package to be downloaded from
a remote repository. Run 'go help importpath' for details.

Every package in a program must have a unique import path.

	modfile.VersionInterval
	Rationale string
}

// goModSummary returns a summary of the go.mod file for module m,
// taking into account any replacements for m, exclusions of its dependencies,
// and/or vendoring.
//
// m must be a version in the module graph, reachable from the Target module.
// In readonly mode, the go.sum file must contain an entry for m's go.mod file

		// all line up (but RawImports can be shorter than the others).
		// That is, for 0 ≤ i < len(RawImports),
		// RawImports[i] is the import string in the program text, and
		// Imports[i] is the expanded import string (vendoring applied or relative path expanded away).
		// Any implicitly added imports appear in Imports and Internal.Imports
		// but not RawImports (because they were not in the source code).