go list -m -versions rsc.io/breaker
stdout '^rsc.io/breaker v1.0.0 v2.0.0\+incompatible$'
go mod download rsc.io/breaker@v1.0.0
! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.mod
go mod download rsc.io/breaker@v2.0.0+incompatible
! grep '^go' $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v2.0.0+incompatible.mod

# Delete downloaded .zip files.
go clean -modcache

# Check for updates.

go install rsc.io/fortune@v1.0.0
stderr '^go: found rsc.io/quote in rsc.io/quote v1.5.2$'
exists $GOPATH/bin/fortune$GOEXE
! exists $GOPATH/pkg/mod/rsc.io/fortune@v1.0.0/go.mod # no go.mod file
go version -m $GOPATH/bin/fortune$GOEXE
stdout '^\tdep\trsc.io/quote\tv1.5.2\t' # latest version of fortune's dependency
rm $GOPATH/bin


# 'go install dir@version' works like a normal 'go install' command if

	}

	// Diagnose common mistake: GOPATH==GOROOT.
	// This setting is equivalent to not setting GOPATH at all,
	// which is not what most people want when they do it.
	if gopath := cfg.BuildContext.GOPATH; filepath.Clean(gopath) == filepath.Clean(cfg.GOROOT) {
		fmt.Fprintf(os.Stderr, "warning: GOPATH set to GOROOT (%s) has no effect\n", gopath)
	} else {
		for _, p := range filepath.SplitList(gopath) {

stderr '^go: no go\.work file found\n\t\(run ''go work init'' first or specify path using GOWORK environment variable\)$'

! go work use .
stderr '^go: no go\.work file found\n\t\(run ''go work init'' first or specify path using GOWORK environment variable\)$'

! go work edit
stderr '^go: no go\.work file found\n\t\(run ''go work init'' first or specify path using GOWORK environment variable\)$'

! go work edit -go=1.18

//
// If the environment variable is unset, GOPATH defaults
// to a subdirectory named "go" in the user's home directory
// ($HOME/go on Unix, %USERPROFILE%\go on Windows),
// unless that directory holds a Go distribution.
// Run "go env GOPATH" to see the current GOPATH.
//
// See https://golang.org/wiki/SettingGOPATH to set a custom GOPATH.
//
// Each directory listed in GOPATH must have a prescribed structure:
//

cp go.mod.orig go.mod
go get rsc.io/fortune@v1.0.0 # note: must use test proxy, does not exist in real world
rm $GOPATH/pkg/mod/cache/download/sumdb # rm sumdb cache but NOT package download cache
rm go.sum

# can fetch by explicit URL
cp go.mod.orig go.mod
env GOSUMDB=$sumdb' '$proxy/sumdb-direct
go get rsc.io/fortune@v1.0.0
rm $GOPATH/pkg/mod/cache/download/sumdb
rm go.sum

# direct access fails (because localhost.localdev does not exist)

[short] skip

go build net
! stale net

symlink new -> $GOROOT
env OLDGOROOT=$GOROOT
env GOROOT=$WORK${/}gopath${/}src${/}new
go env GOROOT
stdout $WORK[\\/]gopath[\\/]src[\\/]new
cd new
! stale net

# Add a control case to check that std is
# stale with an empty cache
env GOCACHE=$WORK${/}gopath${/}cache

exec ./example.test.exe -test.v
stdout '^GOROOT '$TESTGO_GOROOT'$'
stdout '^runtime '$TESTGO_GOROOT${/}src${/}runtime'$'

! exec ./example.test-trimpath.exe -test.v
stdout '^GOROOT $'
stderr 'cannot find package "runtime" in any of:\n\t\(\$GOROOT not set\)\n\t'$WORK${/}gopath${/}src${/}runtime' \(from \$GOPATH\)$'

# Issue 9737: verify that GOARM affects the computed build ID

[short] skip

# arm
env GOOS=linux
env GOARCH=arm
env GOARM=5
go install mycmd
env GOARM=7
stale mycmd


-- go.mod --
module mycmd

go 1.16
-- x.go --
package main

! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.mod
! exists go.sum

# If go.sum exists but contains hashes from an algorithm we don't know about,
# we should see the same error.
cp go.sum.h2only go.sum
! go list -m all
stderr '^go: rsc.io/quote@v1.5.2: missing go.sum entry for go.mod file; to add it:\n\tgo mod download rsc.io/quote$'
! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.mod