if i == nil {
		return modFile != nil
	}

	if i.dataNeedsFix {
		return true
	}

	if modFile.Module == nil {
		if i.module != (module.Version{}) {
			return true
		}
	} else if modFile.Module.Mod != i.module {
		return true
	}

	var goV, toolchain string
	if modFile.Go != nil {
		goV = modFile.Go.Version
	}
	if modFile.Toolchain != nil {

		base.Fatalf(`go: invalid module path "%v": %v`, modPath, invalidMajorVersionMsg)
	}

	fmt.Fprintf(os.Stderr, "go: creating new go.mod: module %s\n", modPath)
	modFile := new(modfile.File)
	modFile.AddModuleStmt(modPath)
	MainModules = makeMainModules([]module.Version{modFile.Module.Mod}, []string{modRoot}, []*modfile.File{modFile}, []*modFileIndex{nil}, nil)

			Deprecated: modFile.Module.Deprecated,
		}
	}
	if modFile.Go != nil {
		f.Go = modFile.Go.Version
	}
	if modFile.Toolchain != nil {
		f.Toolchain = modFile.Toolchain.Name
	}
	for _, r := range modFile.Require {
		f.Require = append(f.Require, requireJSON{Path: r.Mod.Path, Version: r.Mod.Version, Indirect: r.Indirect})
	}
	for _, x := range modFile.Exclude {
		f.Exclude = append(f.Exclude, x.Mod)
	}

add and drop a use directive from the go.work file's set of module directories.

The -replace=old[@v]=new[@v] flag adds a replacement of the given
module path and version pair. If the @v in old@v is omitted, a
replacement without a version on the left side is added, which applies
to all versions of the old module path. If the @v in new@v is omitted,
the new path should be a local module root directory, not a module

func checkVendorConsistency(indexes []*modFileIndex, modFiles []*modfile.File, modRoots []string) {
	// readVendorList only needs the main module to get the directory
	// the vendor directory is in.
	readVendorList(VendorDir())

	if len(modFiles) < 1 {
		// We should never get here if there are zero modfiles. Either
		// we're in single module mode and there's a single module, or

					}
				}
			}
			if modFile := modload.MainModules.ModFile(m); modFile != nil {
				for _, r := range modFile.Replace {
					if replacementWritten[r.Old] {
						// We already recorded this replacement.
						continue
					}
					replacementWritten[r.Old] = true
					rNew := modload.Replacement(r.Old)
					if rNew == (module.Version{}) {
						// There is no replacement. Don't try to write it.

// license that can be found in the LICENSE file.

package gover

import "golang.org/x/mod/modfile"

const (
	// narrowAllVersion is the Go version at which the
	// module-module "all" pattern no longer closes over the dependencies of
	// tests outside of the main module.
	NarrowAllVersion = "1.16"

	// DefaultGoModVersion is the Go version to assume for go.mod files

			modFile := modload.MainModules.ModFile(mainModule)
			if modFile.Go == nil || gover.Compare(modFile.Go.Version, gover.ExplicitIndirectVersion) < 0 {
				if len(modFile.Require) > 0 {
					args = []string{"all"}
				}
			} else {
				// As of Go 1.17, the go.mod file explicitly requires every module
				// that provides any package imported by the main module.

rm $GOPATH/bin/a
cd ..


# 'go install -modfile=x.mod pkg@version' reports an error, but only if
# -modfile is specified explicitly on the command line.
cd m
env GOFLAGS=-modfile=go.mod
go install example.com/cmd/a@latest  # same as above
env GOFLAGS=
! go install -modfile=go.mod example.com/cmd/a@latest
stderr '^go: -modfile cannot be used with commands that ignore the current module$'
cd ..

    # isn't that important to get this exactly right.
    if [ "${replacement}" != "${dep}" ]; then
        find . -name go.mod -print | while read -r modfile; do
            (cd "$(dirname "${modfile}")" && go mod edit -replace "${dep}=${replacement}@${rev}")
        done
    fi
  popd >/dev/null 2>&1
done

echo ""