Improved installation

scripts/check-go-version.sh

@@ -0,0 +1,13 @@
+#!/bin/bash -e
+# Ensure we use Go installed
+if ! (hash go 2>/dev/null) ; then
+    echo "Could not find a Go installation, please install Go and try again."
+    exit 1;
+fi
+
+# Ensure we use Go version 1.11+
+read major minor patch <<< $(go version | sed 's/go version go\([0-9]*\)\.\([0-9]*\)\.\(.*\) .*/\1 \2 \3/')
+if [[ ${major} -ne 1 || ${minor} -lt 11 ]]; then
+    echo "Go 1.11+ is required (v$major.$minor.$patch is installed at `which go`)"
+    exit 1;
+fi

scripts/win/check-go-version.ps1

@@ -0,0 +1,17 @@
+if(-not (Get-Command "go" -errorAction SilentlyContinue))
+{
+    $host.ui.WriteErrorLine("Could not find a Go installation, please install Go and try again.")
+    exit 1
+}
+
+$null = ((go version) -match "go version go(\d+)\.(\d+)\.([^ ]+)")
+$major = $Matches[1]
+$minor = $Matches[2]
+$patch = $Matches[3]
+$loc = (gcm go).Path
+
+if($major -ne 1 -or $minor -lt 11)
+{
+    $host.ui.WriteErrorLine("Go 1.11+ is required (v$major.$minor.$patch is installed at $loc)")
+    exit 1
+}

setup_env.bat

@@ -1,4 +1,7 @@
 @echo off
+PowerShell.exe -NoProfile -ExecutionPolicy Bypass -Command "& './scripts/win/check-go-version.ps1'"
+if %ERRORLEVEL% GTR 0 exit /B 1
+
 call ./scripts/win/install-protobuf.bat
 
 go get github.com/golang/protobuf/protoc-gen-go

setup_env.sh

@@ -1,6 +1,8 @@
 #!/bin/bash -e
+./scripts/check-go-version.sh
 ./scripts/install-protobuf.sh
 
+go mod download
 protobuf_path=$(go list -m -f '{{.Dir}}' github.com/golang/protobuf)
 echo "installing protoc-gen-go..."
 go install $protobuf_path/protoc-gen-go