Text file
src/cmd/go/testdata/script/mod_tidy_compat_irrelevant.txt
1# https://golang.org/issue/46141: 'go mod tidy' for a Go 1.17 module should by
2# default preserve enough checksums for the module to be used by Go 1.16.
3#
4# We don't have a copy of Go 1.16 handy, but we can simulate it by editing the
5# 'go' version in the go.mod file to 1.16, without actually updating the
6# requirements to match.
7
8[short] skip
9
10env MODFMT='{{with .Module}}{{.Path}} {{.Version}}{{end}}'
11
12
13# This module selects the same versions in Go 1.16 and 1.17 for all modules
14# that provide packages (or test dependencies of packages) imported by the
15# main module. However, in Go 1.16 it selects a higher version of a
16# transitive module dependency that is not otherwise relevant to the main module.
17# As a result, Go 1.16 needs an additional checksum for the go.mod file of
18# that irrelevant dependency.
19#
20# The Go 1.16 module graph looks like:
21#
22# m ---- lazy v0.1.0 ---- incompatible v1.0.0
23# |
24# + ------------- requireincompatible v0.1.0 ---- incompatible v2.0.0+incompatible
25
26cp go.mod go.mod.orig
27go mod tidy
28cmp go.mod go.mod.orig
29
30# Make sure that -diff behaves the same as tidy.
31[exec:patch] mv go.mod go.mod.tidyResult
32[exec:patch] mv go.sum go.sum.tidyResult
33[exec:patch] cp go.mod.orig go.mod
34[exec:patch] ! go mod tidy -diff
35[exec:patch] cp stdout diff.patch
36[exec:patch] exec patch -p1 -i diff.patch
37[exec:patch] go mod tidy -diff
38[exec:patch] ! stdout .
39[exec:patch] cmp go.mod go.mod.tidyResult
40[exec:patch] cmp go.sum go.sum.tidyResult
41
42go list -deps -test -f $MODFMT all
43cp stdout out-117.txt
44
45go mod edit -go=1.16
46go list -deps -test -f $MODFMT all
47cmp stdout out-117.txt
48
49
50# If we explicitly drop compatibility with 1.16, we retain fewer checksums,
51# which gives a cleaner go.sum file but causes 1.16 to fail in readonly mode.
52
53cp go.mod.orig go.mod
54go mod tidy -compat=1.17
55cmp go.mod go.mod.orig
56
57# Make sure that -diff behaves the same as tidy.
58[exec:patch] cp go.mod.orig go.mod
59[exec:patch] rm go.sum
60[exec:patch] go mod tidy -compat=1.17 -diff
61[exec:patch] ! stdout .
62
63go list -deps -test -f $MODFMT all
64cmp stdout out-117.txt
65
66go mod edit -go=1.16
67! go list -deps -test -f $MODFMT all
68stderr -count=1 '^go: example.net/lazy@v0.1.0 requires\n\texample.com/retract/incompatible@v1.0.0: missing go.sum entry for go.mod file; to add it:\n\tgo mod download example.com/retract/incompatible$'
69
70
71-- go.mod --
72// Module m imports packages from the same versions under Go 1.17
73// as under Go 1.16, but under 1.16 its (implicit) external test dependencies
74// are higher.
75module example.com/m
76
77go 1.17
78
79replace (
80 example.net/lazy v0.1.0 => ./lazy
81 example.net/requireincompatible v0.1.0 => ./requireincompatible
82)
83
84require example.net/lazy v0.1.0
85-- m.go --
86package m
87
88import _ "example.net/lazy"
89-- lazy/go.mod --
90// Module lazy requires example.com/retract/incompatible v1.0.0.
91//
92// When viewed from the outside it also has a transitive dependency
93// on v2.0.0+incompatible, but in lazy mode that transitive dependency
94// is pruned out.
95module example.net/lazy
96
97go 1.17
98
99exclude example.com/retract/incompatible v2.0.0+incompatible
100
101require (
102 example.com/retract/incompatible v1.0.0
103 example.net/requireincompatible v0.1.0
104)
105-- lazy/lazy.go --
106package lazy
107-- lazy/unimported/unimported.go --
108package unimported
109
110import _ "example.com/retract/incompatible"
111-- requireincompatible/go.mod --
112module example.net/requireincompatible
113
114go 1.15
115
116require example.com/retract/incompatible v2.0.0+incompatible
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