# Test overlays that affect go.mod files

# The go.mod file can exist only in the overlay.
cd $WORK/gopath/src/no-go-mod
go list -overlay overlay.json .
stdout example.com/simple

# Check content of overlaid go.mod is used.
cd $WORK/gopath/src/overlay-go-mod
go list -overlay overlay.json .
stdout use.this/module/name

# Check content of overlaid go.mod in a replacement module is used.
# The go.mod in the replacement module is missing a requirement
# that the overlay has, so it will fail to list without the overlay.
cd $WORK/gopath/src/overlay-replaced-go-mod
! go list -deps .
go list -deps -overlay overlay.json .

# Overlaid go.mod is not rewritten by 'go get'.
cd $WORK/gopath/src/get-doesnt-add-dep
cp $WORK/overlay/get_doesnt_add_dep_go_mod $WORK/want_go_mod
! go get -overlay overlay.json .
stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'
cmp $WORK/overlay/get_doesnt_add_dep_go_mod $WORK/want_go_mod

# Content of overlaid go.sum is used.
# The go.sum in the module directory has garbage values for its
# hashes, but the overlaid file has the correct values. If
# the correct go.sum is used with the overlay, 'go get .' should
# not report a security error.
cd $WORK/gopath/src/overlay-sum-used
! go get .
stderr 'SECURITY ERROR'
! go mod verify
stderr 'SECURITY ERROR'
go get -overlay overlay.json .
go mod verify -overlay overlay.json
# Overlaid go.sum is not rewritten.
# Copy an incomplete file to the overlay file, and expect an error
# attempting to update the file
cp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums
! go get -overlay overlay.json .
stderr '^go: updates to go.sum needed, but go.sum is part of the overlay specified with -overlay$'
cmp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums
! go mod tidy -overlay overlay.json
stderr '^go: updates to go.sum needed, but go.sum is part of the overlay specified with -overlay$'
cmp incomplete-sum-file $WORK/overlay/overlay-sum-used-correct-sums

# -overlay works with -modfile.
# There's an empty go.mod file in the directory, and the file alternate.mod is
# overlaid to the true go.mod file, so the -modfile flag and the overlay
# mechanism need to work together to determine the name of the module.
cd $WORK/gopath/src/overlay-and-dash-modfile
go list -modfile=alternate.mod -overlay overlay.json .
stdout 'found.the/module'
# Even with -modfile, overlaid files can't be opened for write.
! go get -modfile=alternate.mod -overlay overlay.json rsc.io/quote
stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'

# Carving out a module by adding an overlaid go.mod file
cd $WORK/gopath/src/carve
go list ./... # without an overlay, hasmod is carved out and nomod isn't
stdout carve/nomod
! stdout carve/hasmod
go list -overlay overlay_carve_module.json ./... # The overlay carves out nomod, leaving nothing
! stdout .
stderr 'matched no packages'
go list -overlay overlay_uncarve_module.json ./... # The overlay uncarves out hasmod
stdout carve/nomod
stdout carve/hasmod

# Carving out a module by adding an overlaid go.mod file and using
# -modfile to write to that file.
cd $WORK/gopath/src/carve2/nomod
go list -overlay overlay.json all
! stdout ^carve2$
stdout ^carve2/nomod$
# Editing go.mod file fails because overlay is read only
! go get -overlay overlay.json rsc.io/quote
stderr '^go: updates to go.mod needed, but go.mod is part of the overlay specified with -overlay$'
! grep rsc.io/quote $WORK/overlay/carve2-nomod-go.mod
# Editing go.mod file succeeds because we use -modfile to redirect to same file
go get -overlay overlay.json -modfile $WORK/overlay/carve2-nomod-go.mod rsc.io/quote
grep rsc.io/quote $WORK/overlay/carve2-nomod-go.mod

-- no-go-mod/file.go --
package simple
-- no-go-mod/overlay.json --
{
	"Replace": {
		"go.mod": "../../../overlay/simple_go_mod"
	}
}
-- $WORK/overlay/simple_go_mod --
module example.com/simple
-- overlay-go-mod/file.go --
package name
-- overlay-go-mod/go.mod --
module dont.use/this/module/name
-- overlay-go-mod/overlay.json --
{
	"Replace": {
		"go.mod": "../../../overlay/use_this_go_mod"
	}
}
-- $WORK/overlay/use_this_go_mod --
module use.this/module/name
-- overlay-replaced-go-mod/go.mod --
module m

go 1.15

require replaced/mod v1.0.0
replace replaced/mod v1.0.0 => ../replaced-mod
replace dep/mod v1.0.0 => ../dep-mod
-- 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"

func f() { foo.g() }
-- dep-mod/go.mod --
invalid
-- dep-mod/foo/foo.go --
package foo

func g() { fmt.Println("hello") }
-- $WORK/overlay/replacement_module_go_mod --
module replaced/mod

require dep/mod v1.0.0

-- get-doesnt-add-dep/overlay.json --
{
	"Replace": {
		"go.mod": "../../../overlay/get_doesnt_add_dep_go_mod"
	}
}
-- get-doesnt-add-dep/p.go --
package p

import "dependency/mod"

func f() { mod.G() }
-- get-doesnt-add-dep-dependency/go.mod --
module dependency/mod
-- get-doesnt-add-dep-dependency/mod.go --
package mod

func G() {}
-- $WORK/overlay/get_doesnt_add_dep_go_mod --
module get.doesnt/add/dep

replace dependency/mod v1.0.0 => ../get-doesnt-add-dep-dependency
-- overlay-sum-used/go.mod --
module overlay.sum/used

require rsc.io/quote v1.5.0
-- overlay-sum-used/p.go --
package p

import "rsc.io/quote"

func f() string {
	return quote.Hello()
}
-- overlay-sum-used/incomplete-sum-file --
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:pvCbr/wm8HzDD3fVywevekufpn6tCGPY3spdHeZJEsw=
rsc.io/quote v1.5.0 h1:6fJa6E+wGadANKkUMlZ0DhXFpoKlslOQDCo259XtdIE=
rsc.io/sampler v1.3.0 h1:HLGR/BgEtI3r0uymSP/nl2uPLsUnNJX8toRyhfpBTII=
-- overlay-sum-used/overlay.json --
{
	"Replace": {
		"go.sum": "../../../overlay/overlay-sum-used-correct-sums"
	}
}
-- overlay-sum-used/go.sum --
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:garbage+hash
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:garbage+hash
rsc.io/quote v1.5.0 h1:garbage+hash
rsc.io/quote v1.5.0/go.mod h1:garbage+hash
rsc.io/sampler v1.3.0 h1:garbage+hash
rsc.io/sampler v1.3.0/go.mod h1:garbage+hash
-- $WORK/overlay/overlay-sum-used-correct-sums --
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c h1:pvCbr/wm8HzDD3fVywevekufpn6tCGPY3spdHeZJEsw=
golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
rsc.io/quote v1.5.0 h1:6fJa6E+wGadANKkUMlZ0DhXFpoKlslOQDCo259XtdIE=
rsc.io/quote v1.5.0/go.mod h1:LzX7hefJvL54yjefDEDHNONDjII0t9xZLPXsUe+TKr0=
rsc.io/sampler v1.3.0 h1:HLGR/BgEtI3r0uymSP/nl2uPLsUnNJX8toRyhfpBTII=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-- overlay-and-dash-modfile/p.go --
package module
-- overlay-and-dash-modfile/go.mod --
-- overlay-and-dash-modfile/overlay.json --
{
	"Replace": {
		"alternate.mod": "../../../overlay/overlay-and-dash-modfile-alternate-mod"
	}
}
-- $WORK/overlay/overlay-and-dash-modfile-alternate-mod --
module found.the/module
-- carve/go.mod --
module carve
-- carve/overlay_carve_module.json --
{
	"Replace": {
		"nomod/go.mod": "../../../overlay/carve-nomod-go-mod"
	}
}
-- carve/overlay_uncarve_module.json --
{
	"Replace": {
		"hasmod/go.mod": ""
	}
}
-- carve/hasmod/a.go --
package hasmod
-- carve/hasmod/go.mod --
module carve/hasmod
-- carve/nomod/b.go --
package nomod
-- $WORK/overlay/carve-nomod-go-mod --
module carve/nomod
-- carve2/go.mod --
module carve2
-- carve2/p.go --
package p
-- carve2/nomod/overlay.json --
{
	"Replace": {
		"go.mod": "../../../../overlay/carve2-nomod-go.mod"
	}
}
-- carve2/nomod/b.go --
package nomod
-- $WORK/overlay/carve2-nomod-go.mod --
module carve2/nomod