# This test examines the behavior of 'go get …@patch'
# See also mod_upgrade_patch.txt (focused on "-u=patch" specifically)
# and mod_get_patchmod.txt (focused on module/package ambiguities).

cp go.mod go.mod.orig

# example.net/b@patch refers to the patch for the version of b that was selected
# at the start of 'go get', not the version after applying other changes.

! go get -d example.net/a@v0.2.0 example.net/b@patch
stderr '^go get: example.net/a@v0.2.0 requires example.net/b@v0.2.0, not example.net/b@patch \(v0.1.1\)$'
cmp go.mod go.mod.orig


# -u=patch changes the default version for other arguments to '@patch',
# but they continue to be resolved against the originally-selected version,
# not the updated one.
#
# TODO(#42360): Reconsider the change in defaults.

! go get -d -u=patch example.net/a@v0.2.0 example.net/b
stderr '^go get: example.net/a@v0.2.0 requires example.net/b@v0.2.0, not example.net/b@patch \(v0.1.1\)$'
cmp go.mod go.mod.orig


# -u=patch refers to the patches for the selected versions of dependencies *after*
# applying other version changes, not the versions that were selected at the start.
# However, it should not patch versions determined by explicit arguments.

go get -d -u=patch example.net/a@v0.2.0
go list -m all
stdout '^example.net/a v0.2.0 '
stdout '^example.net/b v0.2.1 '


# "-u=patch all" should be equivalent to "all@patch", and should fail if the
# patched versions result in a higher-than-patch upgrade.

cp go.mod.orig go.mod
! go get -u=patch all
stderr '^go get: example.net/a@v0.1.1 \(matching all@patch\) requires example.net/b@v0.2.0, not example.net/b@v0.1.1 \(matching all@patch\)$'
cmp go.mod go.mod.orig


# On the other hand, "-u=patch ./..." should patch-upgrade dependencies until
# they reach a fixed point, even if that results in higher-than-patch upgrades.

go get -u=patch ./...
go list -m all
stdout '^example.net/a v0.1.1 '
stdout '^example.net/b v0.2.1 '


-- go.mod --
module example

go 1.16

require (
	example.net/a v0.1.0
	example.net/b v0.1.0  // indirect
)

replace (
	example.net/a v0.1.0 => ./a10
	example.net/a v0.1.1 => ./a11
	example.net/a v0.2.0 => ./a20
	example.net/a v0.2.1 => ./a21
	example.net/b v0.1.0 => ./b
	example.net/b v0.1.1 => ./b
	example.net/b v0.2.0 => ./b
	example.net/b v0.2.1 => ./b
	example.net/b v0.3.0 => ./b
	example.net/b v0.3.1 => ./b
)
-- example.go --
package example

import _ "example.net/a"

-- a10/go.mod --
module example.net/a

go 1.16

require example.net/b v0.1.0
-- a10/a.go --
package a

import _ "example.net/b"

-- a11/go.mod --
module example.net/a

go 1.16

require example.net/b v0.2.0  // upgraded
-- a11/a.go --
package a

import _ "example.net/b"

-- a20/go.mod --
module example.net/a

go 1.16

require example.net/b v0.2.0
-- a20/a.go --
package a

import _ "example.net/b"

-- a21/go.mod --
module example.net/a

go 1.16

require example.net/b v0.2.0  // not upgraded
-- a21/a.go --
package a

import _ "example.net/b"

-- b/go.mod --
module example.net/b

go 1.16
-- b/b.go --
package b