service: add min/max supported ver and target ver to GetVersion resp (#1718)

Fixes #1713

pkg/goversion/compat.go

@@ -5,10 +5,12 @@ import (
 )
 
 var (
-	minSupportedVersionOfGoMinor = 11
-	maxSupportedVersionOfGoMinor = 13
-	goTooOldErr                  = fmt.Errorf("Version of Go is too old for this version of Delve (minimum supported version 1.%d, suppress this error with --check-go-version=false)", minSupportedVersionOfGoMinor)
-	dlvTooOldErr                 = fmt.Errorf("Version of Delve is too old for this version of Go (maximum supported version 1.%d, suppress this error with --check-go-version=false)", maxSupportedVersionOfGoMinor)
+	MinSupportedVersionOfGoMajor = 1
+	MinSupportedVersionOfGoMinor = 11
+	MaxSupportedVersionOfGoMajor = 1
+	MaxSupportedVersionOfGoMinor = 13
+	goTooOldErr                  = fmt.Errorf("Version of Go is too old for this version of Delve (minimum supported version %d.%d, suppress this error with --check-go-version=false)", MinSupportedVersionOfGoMajor, MinSupportedVersionOfGoMinor)
+	dlvTooOldErr                 = fmt.Errorf("Version of Delve is too old for this version of Go (maximum supported version %d.%d, suppress this error with --check-go-version=false)", MaxSupportedVersionOfGoMajor, MaxSupportedVersionOfGoMinor)
 )
 
 // Compatible checks that the version specified in the producer string is compatible with
@@ -18,10 +20,10 @@ func Compatible(producer string) error {
 	if ver.IsDevel() {
 		return nil
 	}
-	if !ver.AfterOrEqual(GoVersion{1, minSupportedVersionOfGoMinor, -1, 0, 0, ""}) {
+	if !ver.AfterOrEqual(GoVersion{MinSupportedVersionOfGoMajor, MinSupportedVersionOfGoMinor, -1, 0, 0, ""}) {
 		return goTooOldErr
 	}
-	if ver.AfterOrEqual(GoVersion{1, maxSupportedVersionOfGoMinor + 1, -1, 0, 0, ""}) {
+	if ver.AfterOrEqual(GoVersion{MaxSupportedVersionOfGoMajor, MaxSupportedVersionOfGoMinor + 1, -1, 0, 0, ""}) {
 		return dlvTooOldErr
 	}
 	return nil

service/api/types.go

@@ -413,9 +413,13 @@ type GetVersionIn struct {
 
 // GetVersionOut is the result of GetVersion.
 type GetVersionOut struct {
-	DelveVersion string
-	APIVersion   int
-	Backend      string // backend currently in use
+	DelveVersion    string
+	APIVersion      int
+	Backend         string // backend currently in use
+	TargetGoVersion string
+
+	MinSupportedVersionOfGo string
+	MaxSupportedVersionOfGo string
 }
 
 // SetAPIVersionIn is the input for SetAPIVersion.

service/debugger/debugger.go

@@ -1280,6 +1280,12 @@ func (d *Debugger) GetVersion(out *api.GetVersionOut) error {
 			out.Backend = d.config.Backend
 		}
 	}
+
+	out.TargetGoVersion = d.target.BinInfo().Producer()
+
+	out.MinSupportedVersionOfGo = fmt.Sprintf("%d.%d.0", goversion.MinSupportedVersionOfGoMajor, goversion.MinSupportedVersionOfGoMinor)
+	out.MaxSupportedVersionOfGo = fmt.Sprintf("%d.%d.0", goversion.MaxSupportedVersionOfGoMajor, goversion.MaxSupportedVersionOfGoMinor)
+
 	return nil
 }