cp stdout all.json

# clean the module cache, make sure that makes go mod download re-run git fetch, clean again
go clean -modcache
go mod download -x -json vcs-test.golang.org/git/hello.git@latest
stderr 'git( .*)* fetch'
go clean -modcache

# reuse go mod download vcstest/hello result
go mod download -reuse=hello.json -x -json vcs-test.golang.org/git/hello.git@latest
! stderr 'git( .*)* fetch'

# update go.mod - go mod tidy allowed
cp go.mod.empty go.mod
go mod tidy
cp go.mod go.mod.tidy

# -mod=readonly must succeed once go.mod is up-to-date...
go list all

# ... even if it needs downloads
go clean -modcache
go list all

# -mod=readonly must not cause 'go list -m' to fail.
# (golang.org/issue/36478)
go list -m all
! stderr 'cannot query module'

# -mod=readonly should reject inconsistent go.mod files

stdout 1.18


# Even at go 1.20 or earlier, 'go mod tidy' shouldn't need go.mod files or
# checksums that it won't record.

go mod tidy -go=1.20
go clean -modcache  # Remove checksums from the module cache, so that only go.sum is used.

# Issue 60667: 'go list' without -mod=mod shouldn't report the checksums as
# dirty either.
go list -m -u all

env OLDSUMDB=$GOSUMDB

# requirements are inconsistent.)

rm go.sum
cp go.mod.orig go.mod
go mod edit -go=1.17
cp go.mod.update go.mod.go117
go mod edit -go=1.17 go.mod.go117

go clean -modcache
go mod download
cmp go.mod go.mod.go117

go list -e -m all
stdout '^rsc.io/quote v1.5.2$'
exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.zip
stdout '^rsc.io/sampler v1.3.0$'

	}
	return f.Close()
}

// ReadCache reads cached lookups or tiles from
// GOPATH/pkg/mod/cache/download/sumdb,
// which will be deleted by "go clean -modcache".
func (*dbClient) ReadCache(file string) ([]byte, error) {
	targ := filepath.Join(cfg.GOMODCACHE, "cache/download/sumdb", file)
	data, err := lockedfile.Read(targ)
	// lockedfile.Write does not atomically create the file with contents.

	// Redirect the module cache to a fresh directory to avoid crosstalk, and make
	// it read/write so that the test can still clean it up easily when done.
	cfg.GOMODCACHE = filepath.Join(dir, "modcache")
	cfg.ModCacheRW = true

	m.Run()
	return nil
}

func testContext(t testing.TB) context.Context {
	w := newTestWriter(t)
	return cfg.WithBuildXWriter(context.Background(), w)
}

stderr '^go: go.mod file not found in current directory or any parent directory.$'
stderr '^\t''go get'' is no longer supported outside a module.$'

# 'go get' should not download anything.
go clean -modcache
! go get example.com/printversion@v1.0.0
stderr '^go: go.mod file not found in current directory or any parent directory.$'
stderr '^\t''go get'' is no longer supported outside a module.$'

	// go tool may complain.
	os.Setenv("GOPATH", pathf("%s/pkg/obj/gopath", goroot))

	// Set GOPROXY=off to avoid downloading modules to the modcache in
	// the GOPATH set above to be inside GOROOT. The modcache is read
	// only so if we downloaded to the modcache, we'd create readonly
	// files in GOROOT, which is undesirable. See #67463)
	os.Setenv("GOPROXY", "off")

	if err != nil {
		return err
	}
	defer func() {
		if rmErr := os.RemoveAll(dir); err == nil {
			err = rmErr
		}
	}()

	cfg.GOMODCACHE = filepath.Join(dir, "modcache")
	if err := os.Mkdir(cfg.GOMODCACHE, 0755); err != nil {
		return err
	}

	srv, err := vcstest.NewServer()
	if err != nil {
		return err
	}
	defer func() {
		if closeErr := srv.Close(); err == nil {

	// opened files in the temporary directory.
	//
	// Go 1.14.2 and higher respect .partial files. Older versions may use
	// partially extracted directories. 'go mod verify' can detect this,
	// and 'go clean -modcache' can fix it.
	if err := os.MkdirAll(parentDir, 0777); err != nil {
		return "", err
	}
	if err := os.WriteFile(partialPath, nil, 0666); err != nil {
		return "", err
	}