env GO111MODULE=on
[short] skip

# If a pattern doesn't match any packages provided by modules
# in the build list, we assume the pattern matches a single module
# whose path is a prefix of the part of the pattern before "...".
cp go.mod.orig go.mod
go get rsc.io/quote/...
grep 'require rsc.io/quote' go.mod

cp go.mod.orig go.mod
! go get rsc.io/quote/x...
stderr 'go: module rsc.io/quote@upgrade found \(v1.5.2\), but does not contain packages matching rsc.io/quote/x...'
! grep 'require rsc.io/quote' go.mod

! go get rsc.io/quote/x/...
stderr 'go: module rsc.io/quote@upgrade found \(v1.5.2\), but does not contain packages matching rsc.io/quote/x/...'
! grep 'require rsc.io/quote' go.mod

# If a pattern matches no packages within a module, the module should not
# be upgraded, even if the module path is a prefix of the pattern.
cp go.mod.orig go.mod
go mod edit -require example.com/[email protected]
go get example.com/nest/sub/y...
grep 'example.com/nest/sub v1.0.0' go.mod
grep 'example.com/nest v1.0.0' go.mod

# However, if the pattern matches the module path itself, the module
# should be upgraded even if it contains no matching packages.
go get example.com/n...t
grep 'example.com/nest v1.1.0' go.mod
grep 'example.com/nest/sub v1.0.0' go.mod

-- go.mod.orig --
module m

go 1.13

-- use/use.go --
package use

import _ "rsc.io/quote"