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# https://golang.org/issue/45094: 'go mod tidy' now accepts a '-go' flag
# to change the language version in use.
#
# The package import graph used in this test looks like:
#
# m --- a --- b
# |
# b_test --- c
# |
# c_test --- d
#
# The module diagram looks like:
#
# m --- a --- b
# |
# + --- c
# |
# + --- d
#
# Module b omits its dependency on c, and module c omits its dependency on d.
#
# In go 1.15, the tidy main module must require a (because it is direct),
# c (because it is a missing test dependency of an imported package),
# and d (because it is a missing transitive test dependency).
#
# In go 1.16, the tidy main module can omit d because it is no longer
# included in "all".
#
# In go 1.17, the main module must explicitly require b
# (because it is transitively imported by the main module).
cp go.mod go.mod.orig
# An invalid argument should be rejected.
! go mod tidy -go=bananas
stderr '^go mod: invalid -go option "bananas"; expecting something like "-go 1.17"$'
cmp go.mod go.mod.orig
go mod tidy -go=1.15
cmp go.mod go.mod.115
go mod tidy
cmp go.mod go.mod.115
go mod tidy -go=1.16
cmp go.mod go.mod.116
go mod tidy
cmp go.mod go.mod.116
go mod tidy -go=1.17
cmp go.mod go.mod.117
go mod tidy
cmp go.mod go.mod.117
# If we downgrade back to 1.15, we should re-resolve d to v0.2.0 instead
# of the original v0.1.0 (because the original requirement is lost).
go mod tidy -go=1.15
cmp go.mod go.mod.115-2
# -go= (with an empty argument) maintains the existing version or adds the
# default version (just like omitting the flag).
go mod tidy -go=''
cmp go.mod go.mod.115-2
cp go.mod.orig go.mod
go mod tidy -go=''
cmpenv go.mod go.mod.latest
-- go.mod --
module example.com/m
require (
example.net/a v0.1.0
example.net/c v0.1.0 // indirect
example.net/d v0.1.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- m.go --
package m
import _ "example.net/a"
-- go.mod.115 --
module example.com/m
go 1.15
require (
example.net/a v0.1.0
example.net/c v0.1.0 // indirect
example.net/d v0.1.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- go.mod.115-2 --
module example.com/m
go 1.15
require (
example.net/a v0.1.0
example.net/c v0.1.0 // indirect
example.net/d v0.2.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- go.mod.116 --
module example.com/m
go 1.16
require (
example.net/a v0.1.0
example.net/c v0.1.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- go.mod.117 --
module example.com/m
go 1.17
require (
example.net/a v0.1.0
example.net/b v0.1.0 // indirect
example.net/c v0.1.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- go.mod.latest --
module example.com/m
go $goversion
require (
example.net/a v0.1.0
example.net/b v0.1.0 // indirect
example.net/c v0.1.0 // indirect
)
replace (
example.net/a v0.1.0 => ./a
example.net/a v0.2.0 => ./a
example.net/b v0.1.0 => ./b
example.net/b v0.2.0 => ./b
example.net/c v0.1.0 => ./c
example.net/c v0.2.0 => ./c
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
)
-- a/go.mod --
module example.net/a
go 1.15
require example.net/b v0.1.0
-- a/a.go --
package a
import _ "example.net/b"
-- b/go.mod --
module example.net/b
go 1.15
-- b/b.go --
package b
-- b/b_test.go --
package b_test
import _ "example.net/c"
-- c/go.mod --
module example.net/c
go 1.15
-- c/c.go --
package c
-- c/c_test.go --
package c_test
import _ "example.net/d"
-- d/go.mod --
module example.net/d
go 1.15
-- d/d.go --
package d
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