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# This test illustrates a case where an upgrade–downgrade–upgrade cycle could
# add extraneous dependencies due to another module depending on an
# otherwise-unlisted version (such as a pseudo-version).
#
# This case corresponds to the "downhiddenartifact" test in the mvs package.
# The initial package import graph used in the test looks like:
#
# a --- b
# \ \
# \ \
# c --- d
#
# The module dependency graph initially looks like:
#
# a --- b.3
# \ \
# \ \
# c.2 --- d.2
#
# c.1 --- b.2 (pseudo)
#
# b.1 --- e.1
cp go.mod go.mod.orig
go mod tidy
cmp go.mod.orig go.mod
# When we downgrade d.2 to d.1, no dependency on e should be added
# because nothing else in the module or import graph requires it.
go get -d example.net/d@v0.1.0
go list -m all
stdout '^example.net/b v0.2.1-0.20210219000000-000000000000 '
stdout '^example.net/c v0.1.0 '
stdout '^example.net/d v0.1.0 '
! stdout '^example.net/e '
-- go.mod --
module example.net/a
go 1.16
require (
example.net/b v0.3.0
example.net/c v0.2.0
)
replace (
example.net/b v0.1.0 => ./b1
example.net/b v0.2.1-0.20210219000000-000000000000 => ./b2
example.net/b v0.3.0 => ./b3
example.net/c v0.1.0 => ./c1
example.net/c v0.2.0 => ./c2
example.net/d v0.1.0 => ./d
example.net/d v0.2.0 => ./d
example.net/e v0.1.0 => ./e
)
-- a.go --
package a
import (
_ "example.net/b"
_ "example.net/c"
)
-- b1/go.mod --
module example.net/b
go 1.16
require example.net/e v0.1.0
-- b1/b.go --
package b
import _ "example.net/e"
-- b2/go.mod --
module example.net/b
go 1.16
-- b2/b.go --
package b
-- b3/go.mod --
module example.net/b
go 1.16
require example.net/d v0.2.0
-- b3/b.go --
package b
import _ "example.net/d"
-- c1/go.mod --
module example.net/c
go 1.16
require example.net/b v0.2.1-0.20210219000000-000000000000
-- c1/c.go --
package c
import _ "example.net/b"
-- c2/go.mod --
module example.net/c
go 1.16
require example.net/d v0.2.0
-- c2/c.go --
package c
import _ "example.net/d"
-- d/go.mod --
module example.net/d
go 1.16
-- d/d.go --
package d
-- e/go.mod --
module example.net/e
go 1.16
-- e/e.go --
package e
|
