1env GO111MODULE=on
2[short] skip
3
4cp go.mod go.mod.orig
5
6# Make sure the test builds without replacement.
7go build -mod=mod -o a1.exe .
8exec ./a1.exe
9stdout 'Don''t communicate by sharing memory'
10
11# Modules can be replaced by local packages.
12cp go.mod.orig go.mod
13go mod edit -replace=rsc.io/quote/v3=./local/rsc.io/quote/v3
14go build -o a2.exe .
15exec ./a2.exe
16stdout 'Concurrency is not parallelism.'
17
18# The module path of the replacement doesn't need to match.
19# (For example, it could be a long-running fork with its own import path.)
20cp go.mod.orig go.mod
21go mod edit -replace=rsc.io/quote/v3=./local/not-rsc.io/quote/v3
22go build -o a3.exe .
23exec ./a3.exe
24stdout 'Clear is better than clever.'
25
26# However, the same module can't be used as two different paths.
27cp go.mod.orig go.mod
28go mod edit -replace=not-rsc.io/quote/v3@v3.0.0=rsc.io/quote/v3@v3.0.0 -require=not-rsc.io/quote/v3@v3.0.0
29! go build -o a4.exe .
30stderr 'rsc.io/quote/v3@v3.0.0 used for two different module paths \(not-rsc.io/quote/v3 and rsc.io/quote/v3\)'
31
32# Modules that do not (yet) exist upstream can be replaced too.
33cp go.mod.orig go.mod
34go mod edit -replace=not-rsc.io/quote/v3@v3.1.0=./local/rsc.io/quote/v3
35go build -mod=mod -o a5.exe ./usenewmodule
36! stderr 'finding not-rsc.io/quote/v3'
37grep 'not-rsc.io/quote/v3 v3.1.0' go.mod
38exec ./a5.exe
39stdout 'Concurrency is not parallelism.'
40
41# Error messages for modules not found in replacements should
42# indicate the replacement module.
43cp go.mod.orig go.mod
44go mod edit -replace=rsc.io/quote/v3=./local/rsc.io/quote/v3
45! go get rsc.io/quote/v3/missing-package
46stderr 'module rsc.io/quote/v3@upgrade found \(v3.0.0, replaced by ./local/rsc.io/quote/v3\), but does not contain package'
47
48# The reported Dir and GoMod for a replaced module should be accurate.
49cp go.mod.orig go.mod
50go mod edit -replace=rsc.io/quote/v3=not-rsc.io/quote@v0.1.0-nomod
51go mod download rsc.io/quote/v3
52go list -m -f '{{.Path}} {{.Version}} {{.Dir}} {{.GoMod}}{{with .Replace}} => {{.Path}} {{.Version}} {{.Dir}} {{.GoMod}}{{end}}' rsc.io/quote/v3
53stdout '^rsc.io/quote/v3 v3.0.0 '$GOPATH'[/\\]pkg[/\\]mod[/\\]not-rsc.io[/\\]quote@v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]cache[/\\]download[/\\]not-rsc.io[/\\]quote[/\\]@v[/\\]v0.1.0-nomod.mod => not-rsc.io/quote v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]not-rsc.io[/\\]quote@v0.1.0-nomod '$GOPATH'[/\\]pkg[/\\]mod[/\\]cache[/\\]download[/\\]not-rsc.io[/\\]quote[/\\]@v[/\\]v0.1.0-nomod.mod$'
54
55-- go.mod --
56module quoter
57
58require rsc.io/quote/v3 v3.0.0
59
60-- main.go --
61package main
62
63import (
64 "fmt"
65 "rsc.io/quote/v3"
66)
67
68func main() {
69 fmt.Println(quote.GoV3())
70}
71
72-- usenewmodule/main.go --
73package main
74
75import (
76 "fmt"
77 "not-rsc.io/quote/v3"
78)
79
80func main() {
81 fmt.Println(quote.GoV3())
82}
83
84-- local/rsc.io/quote/v3/go.mod --
85module rsc.io/quote/v3
86
87require rsc.io/sampler v1.3.0
88
89-- local/rsc.io/quote/v3/quote.go --
90// Copyright 2018 The Go Authors. All rights reserved.
91// Use of this source code is governed by a BSD-style
92// license that can be found in the LICENSE file.
93
94// Package quote collects pithy sayings.
95package quote
96
97import "rsc.io/sampler"
98
99// Hello returns a greeting.
100func HelloV3() string {
101 return sampler.Hello()
102}
103
104// Glass returns a useful phrase for world travelers.
105func GlassV3() string {
106 // See http://www.oocities.org/nodotus/hbglass.html.
107 return "I can eat glass and it doesn't hurt me."
108}
109
110// Go returns a REPLACED Go proverb.
111func GoV3() string {
112 return "Concurrency is not parallelism."
113}
114
115// Opt returns a optimization truth.
116func OptV3() string {
117 // Wisdom from ken.
118 return "If a program is too slow, it must have a loop."
119}
120
121-- local/not-rsc.io/quote/v3/go.mod --
122module not-rsc.io/quote/v3
123
124-- local/not-rsc.io/quote/v3/quote.go --
125package quote
126
127func GoV3() string {
128 return "Clear is better than clever."
129}
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