1# https://golang.org/issue/36876: As of Go 1.17, vendor/modules.txt should
2# indicate the language version used by each dependency.
3
4[short] skip
5
6# Control case: without a vendor directory, need117 builds and bad114 doesn't.
7
8go build example.net/need117
9! go build example.net/bad114
10stderr '^bad114[/\\]bad114.go:15:2: duplicate method .?Y.?( .*)?$'
11
12
13# With a vendor/modules.txt lacking language versions, the world is topsy-turvy,
14# because we have to guess a uniform version for everything.
15#
16# We always guess Go 1.16, because that was the last version for which
17# 'go mod vendor' failed to record dependency versions, and it has most of
18# the language features added since modules were introduced in Go 1.11.
19#
20# Even so, modules that declare 'go 1.17' and use 1.17 features spuriously fail
21# to build, and modules that declare an older version and use features from a
22# newer one spuriously build (instead of failing as they ought to).
23
24go mod vendor
25
26! grep 1.17 vendor/modules.txt
27! go build example.net/need117
28stderr '^vendor[/\\]example\.net[/\\]need117[/\\]need117.go:5:1[89]:'
29stderr 'conversion of slice to array pointer requires go1\.17 or later'
30
31! grep 1.13 vendor/modules.txt
32go build example.net/bad114
33
34
35# Upgrading the main module to 1.17 adds version annotations.
36# Then everything is once again consistent with the non-vendored world.
37
38go mod edit -go=1.17
39go mod vendor
40
41grep '^## explicit; go 1.17$' vendor/modules.txt
42go build example.net/need117
43
44grep '^## explicit; go 1.13$' vendor/modules.txt
45! go build example.net/bad114
46stderr '^vendor[/\\]example\.net[/\\]bad114[/\\]bad114.go:15:2: duplicate method .?Y.?( .*)?$'
47
48-- go.mod --
49module example.net/m
50
51go 1.16
52
53require (
54 example.net/bad114 v0.1.0
55 example.net/need117 v0.1.0
56)
57
58replace (
59 example.net/bad114 v0.1.0 => ./bad114
60 example.net/need117 v0.1.0 => ./need117
61)
62-- m.go --
63package m
64
65import _ "example.net/bad114"
66import _ "example.net/need117"
67
68-- bad114/go.mod --
69// Module bad114 requires Go 1.14 or higher, but declares Go 1.13.
70module example.net/bad114
71
72go 1.13
73-- bad114/bad114.go --
74package bad114
75
76type XY interface {
77 X()
78 Y()
79}
80
81type YZ interface {
82 Y()
83 Z()
84}
85
86type XYZ interface {
87 XY
88 YZ
89}
90
91-- need117/go.mod --
92// Module need117 requires Go 1.17 or higher.
93module example.net/need117
94
95go 1.17
96-- need117/need117.go --
97package need117
98
99func init() {
100 s := make([]byte, 4)
101 _ = (*[4]byte)(s)
102}
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