# basic fetch (through proxy) works
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

! stderr '\n\tgo mod tidy'

cmp go.mod go.mod.tidy

# Make sure that -diff behaves the same as tidy.
[exec:patch] cp go.mod go.mod.tidyResult
[exec:patch] ! exists go.sum
[exec:patch] cp go.mod.orig go.mod
[exec:patch] ! go mod tidy -e -diff
[exec:patch] stdout 'diff current/go.mod tidy/go.mod'

golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=

-- overlay-replaced-go-mod/source.go --
package m

import "replaced/mod/foo"

func main() {
	foo.f()
}
-- overlay-replaced-go-mod/overlay.json --
{
	"Replace": {
		"../replaced-mod/go.mod": "../../../overlay/replacement_module_go_mod"
	}
}
-- replaced-mod/go.mod --
module replaced/mod
-- replaced-mod/foo/foo.go --
package foo

import "dep/mod/foo"

go mod tidy -compat=1.17
! stderr .
cmp go.mod go.mod.orig

# Make sure that -diff behaves the same as tidy.
[exec:patch] mv go.mod go.mod.tidyResult
[exec:patch] mv go.sum go.sum.tidyResult
[exec:patch] cp go.mod.orig go.mod
[exec:patch] ! go mod tidy -compat=1.17 -diff
[exec:patch] cp stdout diff.patch
[exec:patch] exec patch -p1 -i diff.patch
[exec:patch] go mod tidy -compat=1.17 -diff
[exec:patch] ! stdout .

# but can appear in the main go.mod file anyway and should be resolved.
cp go.mod.orig go.mod
go mod edit -require golang.org/x/text@14c0d48ead0c
cd outside
! go list -m golang.org/x/text
stderr 'go: example.com@v0.0.0 \(replaced by \./\.\.\): parsing ..[/\\]go.mod: '$WORK'[/\\]gopath[/\\]src[/\\]go.mod:5: require golang.org/x/text: version "14c0d48ead0c" invalid: must be of the form v1.2.3'
cd ..

cp m.go m.go.orig
cp m.go.new m.go
go mod tidy
cmp go.mod.new go.mod

go list -m all
stdout '^a v0.1.0 '
stdout '^b v0.1.0 '
stdout '^c v0.1.0 '

# With lazy loading, the go.mod requirements are the same,
# but the dependency on c is initially pruned out.

cp m.go.orig m.go
cp go.mod.orig go.mod
go mod edit -go=1.17
go mod edit -go=1.17 go.mod.new

cp go.mod go.mod.orig
go mod tidy
cmp go.mod.orig go.mod

golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=

[!root] ! cp $WORK/extraneous.txt $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/go.mod
[!GOOS:windows] [!root] ! cp $WORK/extraneous.txt $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/extraneous_file.go
! exists $GOPATH/pkg/mod/rsc.io/quote@v1.5.2/extraneous_file.go


# Repeat part of the test with 'go mod download' instead of 'go get' to verify
# -modcacherw is supported on 'go mod' subcommands.
go clean -modcache
go mod download -modcacherw rsc.io/quote

cmp go.mod go.mod.edit

go mod verify
stdout '^all modules verified$'
cmp go.mod go.mod.edit

go mod why rsc.io/sampler
cmp stdout why.want
cmp go.mod go.mod.edit

go mod why -m rsc.io/sampler
cmp stdout why.want
cmp go.mod go.mod.edit

cp go.mod.orig go.mod

# Removing go.sum breaks other commands, but 'go mod graph' and
# 'go mod why' still work.
rm go.sum
! go list -m all
stderr 'missing go.sum entry'