# -modcacherw is supported on 'go mod' subcommands.
go clean -modcache
go mod download -modcacherw rsc.io/quote
cp $WORK/extraneous.txt $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/extraneous_file.go
! go mod verify
[!root] ! cp $WORK/extraneous.txt $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod


-- $WORK/extraneous.txt --
module oops
-- go.mod --

echo 'intermediate'
cp stdout foo.txt
git add foo.txt
git commit -a -m 'intermediate'

at 2018-04-17T16:00:32-04:00
echo 'another'
cp stdout another.txt
git add another.txt
git commit -a -m 'another'
git tag v2.0.2

at 2018-04-17T16:16:52-04:00
git checkout master
git branch v3
git checkout v3
mkdir v3/sub/dir
echo 'v3/sub/dir/file'
cp stdout v3/sub/dir/file.txt
git add v3

go work vendor
stderr 'go: no dependencies to vendor'
! exists vendor/modules.txt
! go list .
stderr 'go: no modules were found in the current workspace'
mkdir vendor
mv bad_modules.txt vendor/modules.txt
! go list .
stderr 'go: no modules were found in the current workspace'

-- bad_modules.txt --
# a/module
a/package
-- go.work --

# Issue 28549: go test -c -o /dev/null should not overwrite /dev/null when run as root.
cd x
cmp $devnull $WORK/empty.txt
go test -o=$devnull -c
! exists x.test$GOEXE
cmp $devnull $WORK/empty.txt

# Issue 12407: go build -o /dev/null should succeed.
cd ..
go build -o $devnull y
cmp $devnull $WORK/empty.txt

-- x/x_test.go --
package x_test
import (
    "testing"
)
func TestNUL(t *testing.T) {
}
-- y/y.go --

# issue 53314
[GOOS:windows] skip
cd [pkg]
go build

-- [pkg]/go.mod --
module m

go 1.19
-- [pkg]/x.go --
package p

import _ "embed"

//go:embed t.txt
var S string

go test -run=ReadTestdata .
! stdout '(cached)'
go test -run=ReadTestdata .
stdout '(cached)'
cp testdata/bar.txt testdata/foo.txt
go test -run=ReadTestdata .
! stdout '(cached)'

-- go.mod --
module golang.org/issue/29111/foo

-- foo.go --
package foo

-- testdata/foo.txt --
foo
-- testdata/bar.txt --
bar

-- foo_test.go --
package foo_test

import (
	"os"
	"path/filepath"
	"testing"
)

# Auxiliary test for inclusion of otherwise-unused replacements in
# vendor/modules.txt for golang.org/issue/33848.
# We need metadata about replacements in order to verify that modules.txt
# remains in sync with the main module's go.mod file.

env GO111MODULE=on

go mod vendor
cmp go1.14-modules.txt vendor/modules.txt

-- go.mod --
module example.com/foo
go 1.14

require (
	example.com/a v0.1.0
)

replace (

# An untracked file is shown as modified, even if it isn't part of the build.
cp ../../outside/empty.txt .
go install
go version -m $GOBIN/a$GOEXE
stdout '^\tbuild\tvcs=fossil\n'
stdout '^\tbuild\tvcs.modified=true$'
rm empty.txt
rm $GOBIN/a$GOEXE

# An edited file is shown as modified, even if it isn't part of the build.
cp ../../outside/empty.txt ../README
go install
go version -m $GOBIN/a$GOEXE
stdout '^\tbuild\tvcs=fossil\n'

cd sym
go list ./...
cmp stdout $WORK/gopath/src/want_list.txt
-- tree/go.mod --
module example.com/tree

go 1.20
-- tree/tree.go --
package tree
-- tree/branch/branch.go --
package branch
-- dir2/squirrel.go --
package squirrel
-- want_list.txt --
example.com/tree

# https://golang.org/issue/36876: As of Go 1.17, vendor/modules.txt should
# indicate the language version used by each dependency.

[short] skip

# Control case: without a vendor directory, need117 builds and bad114 doesn't.

go build example.net/need117
! go build example.net/bad114
stderr '^bad114[/\\]bad114.go:15:2: duplicate method .?Y.?( .*)?$'


# With a vendor/modules.txt lacking language versions, the world is topsy-turvy,