1# This test uses the fake toolchain switch support in cmd/go/internal/toolchain.Switch
2# to exercise all the version selection logic without needing actual toolchains.
3# See gotoolchain_net.txt and gotoolchain_path.txt for tests of network and PATH toolchains.
4
5env TESTGO_VERSION=go1.500
6env TESTGO_VERSION_SWITCH=switch
7
8# GOTOOLCHAIN=auto runs default toolchain without a go.mod or go.work
9env GOTOOLCHAIN=auto
10go version
11stdout go1.500
12
13# GOTOOLCHAIN=path runs default toolchain without a go.mod or go.work
14env GOTOOLCHAIN=path
15go version
16stdout go1.500
17
18# GOTOOLCHAIN=asdf is a syntax error
19env GOTOOLCHAIN=asdf
20! go version
21stderr '^go: invalid GOTOOLCHAIN "asdf"$'
22
23# GOTOOLCHAIN=version is used directly.
24env GOTOOLCHAIN=go1.600
25go version
26stdout go1.600
27
28env GOTOOLCHAIN=go1.400
29go version
30stdout go1.400
31
32# GOTOOLCHAIN=version+auto sets a minimum.
33env GOTOOLCHAIN=go1.600+auto
34go version
35stdout go1.600
36
37env GOTOOLCHAIN=go1.400.0+auto
38go version
39stdout go1.400.0
40
41# GOTOOLCHAIN=version+path sets a minimum too.
42env GOTOOLCHAIN=go1.600+path
43go version
44stdout go1.600
45
46env GOTOOLCHAIN=go1.400+path
47go version
48stdout go1.400
49
50# Create a go.mod file and test interactions with auto and path.
51
52# GOTOOLCHAIN=auto uses go line if newer than local toolchain.
53env GOTOOLCHAIN=auto
54go mod init m
55go mod edit -go=1.700 -toolchain=none
56go version
57stdout 1.700
58
59go mod edit -go=1.300 -toolchain=none
60go version
61stdout 1.500 # local toolchain is newer
62
63go mod edit -go=1.700 -toolchain=go1.300
64go version
65stdout go1.700 # toolchain too old, ignored
66
67go mod edit -go=1.300 -toolchain=default
68go version
69stdout go1.500
70
71go mod edit -go=1.700 -toolchain=default
72go version
73stdout go1.500 # toolchain local is like GOTOOLCHAIN=local and wins
74! go build
75stderr '^go: go.mod requires go >= 1.700 \(running go 1.500; go.mod sets toolchain default\)'
76
77# GOTOOLCHAIN=path does the same.
78env GOTOOLCHAIN=path
79go mod edit -go=1.700 -toolchain=none
80go version
81stdout 1.700
82
83go mod edit -go=1.300 -toolchain=none
84go version
85stdout 1.500 # local toolchain is newer
86
87go mod edit -go=1.700 -toolchain=go1.300
88go version
89stdout go1.700 # toolchain too old, ignored
90
91go mod edit -go=1.300 -toolchain=default
92go version
93stdout go1.500
94
95go mod edit -go=1.700 -toolchain=default
96go version
97stdout go1.500 # toolchain default applies even if older than go line
98! go build
99stderr '^go: go.mod requires go >= 1.700 \(running go 1.500; GOTOOLCHAIN=path; go.mod sets toolchain default\)'
100
101# GOTOOLCHAIN=min+auto with toolchain default uses min, not local
102
103env GOTOOLCHAIN=go1.400+auto
104go mod edit -go=1.300 -toolchain=default
105go version
106stdout 1.400 # not 1.500 local toolchain
107
108env GOTOOLCHAIN=go1.600+auto
109go mod edit -go=1.300 -toolchain=default
110go version
111stdout 1.600 # not 1.500 local toolchain
112
113# GOTOOLCHAIN names can have -suffix
114env GOTOOLCHAIN=go1.800-bigcorp
115go version
116stdout go1.800-bigcorp
117
118env GOTOOLCHAIN=auto
119go mod edit -go=1.999 -toolchain=go1.800-bigcorp
120go version
121stdout go1.999
122
123go mod edit -go=1.777 -toolchain=go1.800-bigcorp
124go version
125stdout go1.800-bigcorp
126
127# go.work takes priority over go.mod
128go mod edit -go=1.700 -toolchain=go1.999-wrong
129go work init
130go work edit -go=1.400 -toolchain=go1.600-right
131go version
132stdout go1.600-right
133
134go work edit -go=1.400 -toolchain=default
135go version
136stdout go1.500
137
138# go.work misconfiguration does not break go work edit
139# ('go 1.600 / toolchain local' forces use of 1.500 which can't normally load that go.work; allow work edit to fix it.)
140go work edit -go=1.600 -toolchain=default
141go version
142stdout go1.500
143
144go work edit -toolchain=none
145go version
146stdout go1.600
147
148rm go.work
149
150# go.mod misconfiguration does not break go mod edit
151go mod edit -go=1.600 -toolchain=default
152go version
153stdout go1.500
154
155go mod edit -toolchain=none
156go version
157stdout go1.600
158
159# toolchain built with a custom version should know how it compares to others
160
161env TESTGO_VERSION=go1.500-bigcorp
162go mod edit -go=1.499 -toolchain=none
163go version
164stdout go1.500-bigcorp
165
166go mod edit -go=1.499 -toolchain=go1.499
167go version
168stdout go1.500-bigcorp
169
170go mod edit -go=1.500 -toolchain=none
171go version
172stdout go1.500-bigcorp
173
174go mod edit -go=1.500 -toolchain=go1.500
175go version
176stdout go1.500-bigcorp
177
178go mod edit -go=1.501 -toolchain=none
179go version
180stdout go1.501
181
182 # If toolchain > go, we must upgrade to the indicated toolchain (not just the go version).
183go mod edit -go=1.499 -toolchain=go1.501
184go version
185stdout go1.501
186
187env TESTGO_VERSION='go1.500 (bigcorp)'
188go mod edit -go=1.499 -toolchain=none
189go version
190stdout 'go1.500 \(bigcorp\)'
191
192go mod edit -go=1.500 -toolchain=none
193go version
194stdout 'go1.500 \(bigcorp\)'
195
196go mod edit -go=1.501 -toolchain=none
197go version
198stdout go1.501
199
200# avoid two-step switch, first from install target requirement, then from GOTOOLCHAIN min
201# instead, just jump directly to GOTOOLCHAIN min
202env TESTGO_VERSION=go1.2.3
203env GODEBUG=toolchaintrace=1
204env GOTOOLCHAIN=go1.23.0+auto
205! go install rsc.io/fortune/nonexist@v0.0.1
206! stderr 'switching to go1.22.9'
207stderr 'using go1.23.0'
208env GODEBUG=
209env GOTOOLCHAIN=auto
210
211# go install m@v and go run m@v should ignore go.mod and use m@v
212env TESTGO_VERSION=go1.2.3
213go mod edit -go=1.999 -toolchain=go1.998
214
215! go install rsc.io/fortune/nonexist@v0.0.1
216stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
217stderr '^go: rsc.io/fortune/nonexist@v0.0.1: module rsc.io/fortune@v0.0.1 found, but does not contain package rsc.io/fortune/nonexist'
218
219! go run rsc.io/fortune/nonexist@v0.0.1
220stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
221stderr '^go: rsc.io/fortune/nonexist@v0.0.1: module rsc.io/fortune@v0.0.1 found, but does not contain package rsc.io/fortune/nonexist'
222
223# go install should handle unknown flags to find m@v
224! go install -unknownflag rsc.io/fortune/nonexist@v0.0.1
225stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
226stderr '^flag provided but not defined: -unknownflag'
227
228! go install -unknownflag arg rsc.io/fortune/nonexist@v0.0.1
229stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
230stderr '^flag provided but not defined: -unknownflag'
231
232# go run cannot handle unknown boolean flags
233! go run -unknownflag rsc.io/fortune/nonexist@v0.0.1
234! stderr switching
235stderr '^flag provided but not defined: -unknownflag'
236
237! go run -unknownflag oops rsc.io/fortune/nonexist@v0.0.1
238! stderr switching
239stderr '^flag provided but not defined: -unknownflag'
240
241# go run can handle unknown flag with argument.
242! go run -unknown=flag rsc.io/fortune/nonexist@v0.0.1
243stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
244stderr '^flag provided but not defined: -unknown'
245
246# go install m@v should handle queries
247! go install rsc.io/fortune/nonexist@v0.0
248stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
249stderr '^go: rsc.io/fortune/nonexist@v0.0: module rsc.io/fortune@v0.0 found \(v0.0.1\), but does not contain package rsc.io/fortune/nonexist'
250
251# go run m@v should handle queries
252! go install rsc.io/fortune/nonexist@v0
253stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
254stderr '^go: rsc.io/fortune/nonexist@v0: module rsc.io/fortune@v0 found \(v0.0.1\), but does not contain package rsc.io/fortune/nonexist'
255
256# go install m@v should use local toolchain if not upgrading
257! go install rsc.io/fortune/nonexist@v1
258! stderr go1.22.9
259! stderr switching
260stderr '^go: downloading rsc.io/fortune v1.0.0$'
261stderr '^go: rsc.io/fortune/nonexist@v1: module rsc.io/fortune@v1 found \(v1.0.0\), but does not contain package rsc.io/fortune/nonexist'
262
263# go run m@v should use local toolchain if not upgrading
264! go run rsc.io/fortune/nonexist@v1
265! stderr go1.22.9
266! stderr switching
267stderr '^go: rsc.io/fortune/nonexist@v1: module rsc.io/fortune@v1 found \(v1.0.0\), but does not contain package rsc.io/fortune/nonexist'
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