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Viewing file:     mod_get_downup_pseudo_artifact.txt (2.09 KB)      -rw-r--r--

# 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 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