# shouldn't require it when it won't be used.
#
# TODO(golang.org/issue/39882): commands below should work, too.
# * go clean -modcache
# * go env
# * go fix
# * go fmt
# * go generate
# * go get
# * go list (without -export or -compiled)

env GOCACHE=off

# Commands that don't completely load packages should work.
go doc fmt
stdout Printf

! go tool compile -h
stderr usage:

# downloaded dependencies are read-only
exists -readonly $GOPATH/pkg/mod/rsc.io/quote@v1.5.2
exists -readonly $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/buggy

# go clean -modcache can delete read-only dependencies
go clean -modcache
! exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2

# list {{.Dir}} shows replaced directories
cp go.mod2 go.mod
go list -mod=mod -f {{.Dir}} rsc.io/quote

cp go.sum saved.sum


# Download from proxy.golang.org with go.sum entry already.
# Use 'go list' instead of 'go get' since the latter may download extra go.mod
# files not listed in go.sum.

go clean -modcache
env GOSUMDB=sum.golang.org
env GOPROXY=https://proxy.golang.org,direct

go list -x -m all  # Download go.mod files.
! stderr github
stderr proxy.golang.org/rsc.io/quote
! stderr sum.golang.org/tile

# Explicitly requesting that same version should succeed, fetching additional
# history for the requested commit as needed in order to validate the
# pseudo-version base.
go clean -modcache
cp go.mod.orig go.mod
go get -x vcs-test.golang.org/git/issue47650.git/cmd/issue47650@v0.1.1-0.20210811175200-21535ef346c3
stderr '^go: added vcs-test.golang.org/git/issue47650.git v0.1.1-0.20210811175200-21535ef346c3$'

# golang.org/issue/26704
go list -mod=vendor
cmp go.mod go.mod.good

# With a clean (and empty) module cache, 'go list -mod=vendor' should not download modules.
go clean -modcache
env GOPROXY=off
! go list ...
go list -mod=vendor ...

# However, it should still list packages in the main module.
go list -mod=vendor m/...
stdout m

-- go.mod --
module m
go 1.12
-- x.go --

# Now remove the module dependencies from the module cache.
# Because one module upgrades a transitive dependency needed by another,
# listing the modules in the workspace should error out.

go clean -modcache
env GOPROXY=off
! go list -m all
stderr '^go: rsc.io/sampler@v1.3.0: module lookup disabled by GOPROXY=off$'

-- example.go --
package example

import _ "rsc.io/sampler"
-- go.mod --
module example

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 list -m -u rsc.io/breaker
stdout '^rsc.io/breaker v1.0.0 \[v2.0.0\+incompatible\]$'

# We should not have downloaded zips.
! exists $GOPATH/pkg/mod/cache/download/rsc.io/breaker/@v/v1.0.0.zip

! exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.0.mod
grep '^rsc\.io/quote v1\.5\.2/go\.mod h1:' go.work.sum
grep '^rsc\.io/quote v1\.5\.2 h1:' go.work.sum

go clean -modcache
rm go.work.sum
go mod download
exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.info
exists $GOPATH/pkg/mod/cache/download/rsc.io/quote/@v/v1.5.2.mod

stderr 'SECURITY ERROR\ngo.sum database server misbehavior detected!'
stderr 'proof of misbehavior:'

# removing the cached wrong tree head and cached tiles clears the bad data
rm $GOPATH/pkg/sumdb/$dbname/latest
go clean -modcache
go get rsc.io/fortune

-- go.mod.orig --
module m

go 1.16
-- m.go --
package m

# 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