1[!git] skip
2[!exec:hg] skip
3[short] skip
4env GOFLAGS='-n -buildvcs'
5
6# Create a root module in a root Git repository.
7mkdir root
8cd root
9go mod init example.com/root
10exec git init
11
12
13# Nesting repositories in parent directories are an error, to prevent VCS injection.
14# This can be disabled with the allowmultiplevcs GODEBUG.
15mkdir hgsub
16cd hgsub
17exec hg init
18cp ../../main.go main.go
19! go build
20stderr '^error obtaining VCS status: multiple VCS detected: hg in ".*hgsub", and git in ".*root"$'
21stderr '^\tUse -buildvcs=false to disable VCS stamping.$'
22env GODEBUG=allowmultiplevcs=1
23! go build
24stderr '^error obtaining VCS status: main module is in repository ".*root" but current directory is in repository ".*hgsub"$'
25stderr '^\tUse -buildvcs=false to disable VCS stamping.$'
26go build -buildvcs=false
27env GODEBUG=
28go mod init example.com/root/hgsub
29! go build
30stderr '^error obtaining VCS status: multiple VCS detected: hg in ".*hgsub", and git in ".*root"$'
31stderr '^\tUse -buildvcs=false to disable VCS stamping.$'
32env GODEBUG=allowmultiplevcs=1
33go build
34env GODEBUG=
35cd ..
36
37# It's an error to build a package from a nested Git repository if the package
38# is in a separate repository from the current directory or from the module
39# root directory. Otherwise nested Git repositories are allowed, as this is
40# how Git implements submodules (and protects against Git based VCS injection.)
41mkdir gitsub
42cd gitsub
43exec git init
44exec git config user.name 'J.R.Gopher'
45exec git config user.email 'gopher@golang.org'
46cp ../../main.go main.go
47! go build
48stderr '^error obtaining VCS status: main module is in repository ".*root" but current directory is in repository ".*gitsub"$'
49go build -buildvcs=false
50go mod init example.com/root/gitsub
51exec git commit --allow-empty -m empty # status commands fail without this
52go build
53rm go.mod
54cd ..
55! go build ./gitsub
56stderr '^error obtaining VCS status: main package is in repository ".*gitsub" but current directory is in repository ".*root"$'
57go build -buildvcs=false -o=gitsub${/} ./gitsub
58
59-- main.go --
60package main
61func main() {}
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