Thanks for the responses. I will try a few options and see what fit best.
For a bit of context I’m making a script to check if the entire toolchain needed to build a project is present on the machine. The script checks for node/npm, Go, GCC and a few other tools (like go-bindata eg.). The real challenge (atm) is minimum required versions and that this must run on Windows, Linux and macOS. A pragmatic solution would be to cut this effort short and have the team accept “if build fails, check that this list of tools is installed” (it is a <10 ppl team). Another option I’m toying is having the (up-to-date) toolchain in a container. -- Michael Banzon https://michaelbanzon.com/ > Den 10. aug. 2017 kl. 09.14 skrev Konstantin Khomoutov <kos...@bswap.ru>: > > On Wed, Aug 09, 2017 at 03:11:48PM +0200, Michael Banzon wrote: > >> Is there a way to have a (bash) script check if the version of the Go >> compiler installed is a specific minimum version? > > In the light of [1], I think you could combine checking of the presense > of the `go` tool itself with build tags. > Say, something like this (untested): > > ---------------->8---------------- > set -eu > > rc=0 > go version >/dev/null || rc=$? > if [ $rc -ne 0 ]; then > echo "The 'go' tool is not available" >&2 > exit 2 > fi > > d=`mktemp -d` > f=`mktemp` > trap "rm -rf '$d' '$f'" EXIT INT TERM QUIT > cd "$d" > > cat >false.go <<'EOF' > // +build !go1.7 > package main > > import "os" > > func main() { > os.Exit(1) > } > EOF > > cat >true.go <<'EOF' > // +build go1.7 > package main > > import "os" > > func main() { > os.Exit(0) > } > EOF > > go build -o "$f" "$d/*.go" > > rc=0 > "$f" || rc=1 > > if [ $rc -ne 0 ]; then > echo "Insufficient Go version" >&2 > exit 2 > fi > > exit 0 > ---------------->8---------------- > > One possible caveat is that `mktemp` by default creates its filesystem > entries under $TMPDIR or /tmp, and that directory might be mounted with > "noexec" on certain systems. So if your setup script (or whatever it > is) has a luxury of using its own scratch space, you should probably do > that (like creating a temp. directory using `mktemp -f ~/.cache/XXXXXX` > or something like this). > > 1. https://github.com/golang/go/issues/21207 > -- 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.
