env GO111MODULE=on

go get rsc.io/quote@v1.5.1
go mod vendor
env GOPATH=$WORK/empty
env GOPROXY=file:///nonexist

go list -mod=vendor
go list -mod=vendor -f '{{with .Module}}{{.Path}} {{.Version}}{{end}} {{.Dir}}' all
stdout '^rsc.io/quote v1.5.1 .*vendor[\\/]rsc.io[\\/]quote$'
stdout '^golang.org/x/text v0.0.0.* .*vendor[\\/]golang.org[\\/]x[\\/]text[\\/]language$'

! go list -mod=vendor -m rsc.io/quote@latest

cp correct_modules.txt vendor/modules.txt
go build ./vendor/foo.com/internal/bar/a

# For go versions < 1.23, vendored packages that are missing in modules.txt should not result in an error.
cp 122go.mod go.mod

cp incorrect_modules.txt vendor/modules.txt

# go version < 1.23 and incorrect_modules is missing foo.com/internal/bar/b so the build should not fail
go build ./vendor/foo.com/internal/bar/a

go work vendor
cmp modules.txt.want vendor/modules.txt
go list example.com/a example.com/b

# Module required in go.mod but not marked explicit in modules.txt
cp modules.txt.required_but_not_explicit vendor/modules.txt
! go list example.com/a example.com/b
cmpenv stderr required_but_not_explicit_error.txt

# Replacement in go.mod but no replacement in modules.txt
cp modules.txt.missing_replacement vendor/modules.txt
! go list example.com/a example.com/b

	}
	for _, c := range string(vendor[1 : len(vendor)-1]) {
		switch {
		case isAlphaNumeric(c):
		case c == '_' || c == '-' || c == '.':
		default:
			return fmt.Errorf("invalid character '%c' in vendor name %q",
				c, vendor)
		}
	}
	if !isAlphaNumeric(rune(vendor[len(vendor)-1])) {
		return fmt.Errorf("invalid vendor %q, should end with a letter or digit", vendor)
	}

	return nil

-- complex/nest/sub/test12/p.go --
package test12

// Check that vendor/v1 is used but vendor/v2 is NOT used (sub/vendor/v2 wins).

import (
	"v1"
	"v2"
)

const x = v1.ComplexNestVendorV1
const y = v2.ComplexNestSubVendorV2

-- complex/nest/sub/test23/p.go --
package test23

// Check that vendor/v3 is used but vendor/v2 is NOT used (sub/vendor/v2 wins).

import (
	"v2"
	"v3"
)

# https://golang.org/issue/42970: As of Go 1.17, go.mod and go.sum files should
# be stripped from vendored dependencies.

go mod vendor
cd vendor/example.net/x
go list all
! stdout '^example.net/m'
stdout '^example.net/x$'
exists ./go.sum

cd ../../..
go mod edit -go=1.17
go mod vendor
cd vendor/example.net/x
go list all
stdout '^example.net/m$'
stdout '^example.net/x$'
! exists ./go.sum

-- go.mod --

# rules).

cd $GOROOT/src
env GOWORK=off

go list std
stdout ^vendor/golang.org/x/net/http2/hpack
! stdout ^golang\.org/x

# The dependencies of packages with an explicit 'vendor/' prefix should
# still themselves resolve to vendored packages.
go list -deps vendor/golang.org/x/crypto/chacha20
stdout ^vendor/golang.org/x/crypto/internal/alias
! stdout ^golang\.org/x

stderr '^no Go files in '$WORK'[/\\]gopath[/\\]src[/\\]dir[/\\]vendor[/\\]nonexist$'

! go list -mod=vendor ./vendor/unlisted
stderr '^directory '$WORK'[/\\]gopath[/\\]src[/\\]dir[/\\]vendor[/\\]unlisted is not a package listed in vendor/modules.txt$'

go list -mod=vendor ./vendor/pkg
stdout '^pkg$'

# Packages within GOROOT should resolve as in any other module,
# except that -mod=vendor is implied by default.
cd $GOROOT/src
! go list .

env GO111MODULE=on

# Replacement should not use a vendor directory as the target.
! go mod vendor
stderr 'replacement path ./vendor/not-rsc.io/quote/v3 inside vendor directory'

cp go.mod1 go.mod
rm -r vendor

# Before vendoring, we expect to see the original directory.
go list -f '{{with .Module}}{{.Version}}{{end}} {{.Dir}}' rsc.io/quote/v3
stdout 'v3.0.0'
stdout '.*[/\\]not-rsc.io[/\\]quote[/\\]v3'

env GO111MODULE=on

go list -mod=vendor example.com/...
stdout ^example.com/x$
stdout ^example.com/x/y$
! stdout ^example.com/x/vendor

-- go.mod --
module example.com/m

-- vendor/modules.txt --
# example.com/x v0.0.0
example.com/x
# example.com/x/y v0.1.0
example.com/x/y

-- vendor/example.com/x/go.mod --
module example.com/x
-- vendor/example.com/x/x.go --
package x

-- vendor/example.com/x/y/go.mod --