As part of our testing we need to install a tool that currently does not have go.mod/go.sum files. Since we test on Go versions both with and without module support and want to test using modules on the versions that have module support we need to use an approach that works in both of those situations. We use git clone and checkout to get the version we want.
However, this fails when GO111MODULE=on because go install wants to find a go.mod and does not. Note that the tool has no external dependencies. ``` $ mkdir -p /home/travis/gopath/src/github.com/goccmack $ git clone https://github.com/goccmack/gocc.git /home/travis/gopath/src/github.com/goccmack/gocc Cloning into '/home/travis/gopath/src/github.com/goccmack/gocc'... $ cd /home/travis/gopath/src/github.com/goccmack/gocc $ git checkout 0e2cfc030005b281b2e5a2de04fa7fe1d5063722 Note: checking out '0e2cfc030005b281b2e5a2de04fa7fe1d5063722'. You are in 'detached HEAD' state. You can look around, make experimental changes and commit them, and you can discard any commits you make in this state without impacting any branches by performing another checkout. If you want to create a new branch to retain commits you create, you may do so (now or later) by using -b with the checkout command again. Example: git checkout -b <new-branch-name> HEAD is now at 0e2cfc0... Merge pull request #78 from shivansh/fix/Makefile $ go install go: cannot find main module, but found .git/config in /home/travis/gopath/src/github.com/goccmack/gocc to create a module there, run: go mod init ``` My approach to dealing with this is to set GO111MODULE=auto for the go install operation, but this is very kludgy and not guaranteed to work if GO111MODULE=auto/off is not respected in the future by one Go version (we support 3 minor versions of Go, so this could potentially happen). What is the recommended approach for this situation, assuming the tool authors do not want to add a go.mod file? -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
