cli: add cgo compiler, os and arch info to version output

also hide the dep versions unless requested with --all since they are usually captured by the tag
thanks to glock, and thus just clutter up submitted issue reports.

```
$ ./cockroach version
Build Tag:   beta-20160331-dirty
Build Time:  2016/03/31 14:42:04
Platform:  darwin amd64
Go Version:  go1.6
C Compiler:  4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.29)
```

cli/cli.go

@@ -30,6 +30,8 @@ import (
 // Proxy to allow overrides in tests.
 var osStderr = os.Stderr
 
+var versionIncludesDeps bool
+
 var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "output version information",
@@ -39,11 +41,15 @@ Output build version information.
 	Run: func(cmd *cobra.Command, args []string) {
 		info := util.GetBuildInfo()
 		tw := tabwriter.NewWriter(os.Stdout, 2, 1, 2, ' ', 0)
-		fmt.Fprintf(tw, "Build Vers:  %s\n", info.Vers)
 		fmt.Fprintf(tw, "Build Tag:   %s\n", info.Tag)
 		fmt.Fprintf(tw, "Build Time:  %s\n", info.Time)
-		fmt.Fprintf(tw, "Build Deps:\n\t%s\n",
-			strings.Replace(strings.Replace(info.Deps, " ", "\n\t", -1), ":", "\t", -1))
+		fmt.Fprintf(tw, "Platform:    %s\n", info.Platform)
+		fmt.Fprintf(tw, "Go Version:  %s\n", info.GoVersion)
+		fmt.Fprintf(tw, "C Compiler:  %s\n", info.CgoCompiler)
+		if versionIncludesDeps {
+			fmt.Fprintf(tw, "Build Deps:\n\t%s\n",
+				strings.Replace(strings.Replace(info.Deps, " ", "\n\t", -1), ":", "\t", -1))
+		}
 		_ = tw.Flush()
 	},
 }

cli/cliflags/names.go

@@ -21,6 +21,7 @@ const (
 	AttrsName      = "attrs"
 	CacheName      = "cache"
 	DatabaseName   = "database"
+	DepsName       = "deps"
 	ExecuteName    = "execute"
 	JoinName       = "join"
 	HostName       = "host"

cli/flags.go

@@ -75,6 +75,9 @@ Database server port to connect to for HTTP requests.`),
 	cliflags.DatabaseName: wrapText(`
 The name of the database to connect to.`),
 
+	cliflags.DepsName: wrapText(`
+Include all dependency versions`),
+
 	cliflags.ExecuteName: wrapText(`
 Execute the SQL statement(s) on the command line, then exit. This flag may be
 specified multiple times and each value may contain multiple semicolon
@@ -474,6 +477,11 @@ func initFlags(ctx *Context) {
 		f.BoolVar(&cliContext.debug.raw, cliflags.RawName, false, usage(cliflags.RawName))
 		f.BoolVar(&cliContext.debug.values, cliflags.ValuesName, false, usage(cliflags.ValuesName))
 	}
+
+	{
+		f := versionCmd.Flags()
+		f.BoolVar(&versionIncludesDeps, cliflags.DepsName, false, usage(cliflags.DepsName))
+	}
 }
 
 func init() {

cli/start.go

@@ -159,7 +159,7 @@ func runStart(_ *cobra.Command, _ []string) error {
 	}
 
 	info := util.GetBuildInfo()
-	log.Infof("[build] %s @ %s (%s)", info.Tag, info.Time, info.Vers)
+	log.Infof("[build] %s @ %s (%s)", info.Tag, info.Time, info.GoVersion)
 
 	// Default user for servers.
 	cliContext.User = security.NodeUser
@@ -194,7 +194,7 @@ func runStart(_ *cobra.Command, _ []string) error {
 	}
 
 	tw := tabwriter.NewWriter(os.Stdout, 2, 1, 2, ' ', 0)
-	fmt.Fprintf(tw, "build:\t%s @ %s (%s)\n", info.Tag, info.Time, info.Vers)
+	fmt.Fprintf(tw, "build:\t%s @ %s (%s)\n", info.Tag, info.Time, info.GoVersion)
 	fmt.Fprintf(tw, "admin:\t%s\n", cliContext.AdminURL())
 	fmt.Fprintf(tw, "sql:\t%s\n", pgURL)
 	if len(cliContext.SocketFile) != 0 {

util/build.go

@@ -16,22 +16,40 @@
 
 package util
 
-import "runtime"
+import (
+	"fmt"
+	"runtime"
+)
+
+// const char* compilerVersion() {
+// 	#if defined(__clang__)
+// 		return __VERSION__;
+// 	#elif defined(__GNUC__) || defined(__GNUG__)
+//		return "gcc " __VERSION__;
+//  #else
+//		return "unknown";
+// 	#endif
+// }
+import "C"
 
 var (
 	// These variables are initialized via the linker -X flag in the
 	// top-level Makefile when compiling release binaries.
-	buildTag  string // Tag of this build (git describe)
-	buildTime string // Build time in UTC (year/month/day hour:min:sec)
-	buildDeps string // Git SHAs of dependencies
+	buildTag         string // Tag of this build (git describe)
+	buildTime        string // Build time in UTC (year/month/day hour:min:sec)
+	buildDeps        string // Git SHAs of dependencies
+	buildCgoCompiler = C.GoString(C.compilerVersion())
+	buildPlatform    = fmt.Sprintf("%s %s", runtime.GOOS, runtime.GOARCH)
 )
 
 // GetBuildInfo ...
 func GetBuildInfo() BuildInfo {
 	return BuildInfo{
-		Vers: runtime.Version(),
-		Tag:  buildTag,
-		Time: buildTime,
-		Deps: buildDeps,
+		GoVersion:   runtime.Version(),
+		Tag:         buildTag,
+		Time:        buildTime,
+		Deps:        buildDeps,
+		CgoCompiler: buildCgoCompiler,
+		Platform:    buildPlatform,
 	}
 }

util/build.proto

@@ -22,8 +22,10 @@ import weak "gogoproto/gogo.proto";
 
 // BuildInfo describes build information for this CockroachDB binary.
 message BuildInfo {
-  optional string vers = 1 [(gogoproto.nullable) = false, (gogoproto.jsontag) = "goVersion"];
+  optional string go_version = 1 [(gogoproto.nullable) = false];
   optional string tag = 2 [(gogoproto.nullable) = false];
   optional string time = 3 [(gogoproto.nullable) = false];
   optional string deps = 4 [(gogoproto.nullable) = false, (gogoproto.jsontag) = "dependencies"];
+  optional string cgo_compiler = 5 [(gogoproto.nullable) = false];
+  optional string platform = 6 [(gogoproto.nullable) = false];
 }