Hi Andi, > 1) I cannot do go install tools.go:
go install takes main packages as arguments, so no, this will not work. The tools.go file (like the example you present) is simply a way of declaring a dependency on a main package through a file that will never be built (hence the +build tools constraint). Even though this file is, in normal operation, ignored by all build commands (go build, go install etc) it _is_ seen by go mod tidy (which ignores build constraints). Hence the requirement is considered when collating the main module's requirements. > instead I need to duplicate each tool installation in the Makefile If you want to install these commands then yes, this needs to happen somewhere (could even be a go:generate step) However, you can simply go run $mainpkg and this will work (see below) > 2) The internal tools are currently not installed in invoked during build: Per my suggestion above, this is my preferred mechanism. It avoids any unnecessary steps of ensuring the correct GOBIN, PATH etc. > //go:generate go run ../cmd/tools/decorate.go ... > > This fails during cross-build: > GOOS=linux GOARCH=arm make > go install github.com/mjibson/esc > go install github.com/golang/mock/mockgen > Generating embedded assets > go generate ./... > ... > fork/exec > /var/folders/pm/q2g_c0vn1hb414nqwdcsv4fm0000gn/T/go-build741389459/b001/exe/decorate: > exec format error > charger/evsewifi.go:57: running "go": exit status 1 > fork/exec > /var/folders/pm/q2g_c0vn1hb414nqwdcsv4fm0000gn/T/go-build892585922/b001/exe/decorate: > exec format error > meter/meter.go:16: running "go": exit status 1 > > I've looked at https://golang.org/cmd/go/#hdr-Build_constraints but couldn't > find a description of best practices or even mention of +built tools. I'm not sure how you are getting into this situation, because go run will build a binary for the platform on which cmd/go is running. Unless you have GOOS and GOARCH set, in which case the go run during the go generate phase will be building for potentially a different platform? Paul -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CACoUkn4O%2Byg2GxWRccoMCv9wjibq9QwGsmbP0t52FqZyw5Jq%2Bg%40mail.gmail.com.
