service/example/runner: write std out, std err to files.

example/runner/runner.go

@@ -25,6 +25,8 @@ type Config struct {
 	Exec string
 	Args []string
 	Env  []string
+
+	Stderr, Stdout string
 }
 
 var logger service.Logger
@@ -61,13 +63,29 @@ func (p *program) run(cmd *exec.Cmd) {
 		}
 	}()
 
-	out, err := cmd.CombinedOutput()
+	if p.Stderr != "" {
+		f, err := os.OpenFile(p.Stderr, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0777)
+		if err != nil {
+			logger.Warningf("Failed to open std err %q: %v", p.Stderr, err)
+			return
+		}
+		defer f.Close()
+		cmd.Stderr = f
+	}
+	if p.Stdout != "" {
+		f, err := os.OpenFile(p.Stdout, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0777)
+		if err != nil {
+			logger.Warningf("Failed to open std out %q: %v", p.Stdout, err)
+			return
+		}
+		defer f.Close()
+		cmd.Stdout = f
+	}
+
+	err := cmd.Run()
 	if err != nil {
 		logger.Warningf("Error running: %v", err)
 	}
-	if len(out) != 0 {
-		logger.Info(string(out))
-	}
 
 	return
 }

example/runner/runner.json

@@ -11,5 +11,8 @@
 		"GOROOT_BOOTSTRAP=C:\\dev\\go_ready",
 		"HOMEDRIVE=C:",
 		"HOMEPATH=\\Documents and Settings\\Administrator"
-	]
+	],
+	
+	"Stderr": "C:\\builder_err.log",
+	"Stdout": "C:\\builder_out.log"
 }