From 37b6255e4255d57f7d853fdb3813163bdeed472d Mon Sep 17 00:00:00 2001
From: Jae Kwon <jae@tendermint.com>
Date: Sun, 8 Nov 2015 17:43:48 -0800
Subject: [PATCH] Move process to go-process

---
 cmd/barak/barak.go           |  7 ++--
 cmd/barak/main.go            |  8 ++--
 cmd/barak/types/responses.go |  2 +-
 process/process.go           | 75 ------------------------------------
 4 files changed, 8 insertions(+), 84 deletions(-)
 delete mode 100644 process/process.go

diff --git a/cmd/barak/barak.go b/cmd/barak/barak.go
index 2105b5068..187daa9fd 100644
--- a/cmd/barak/barak.go
+++ b/cmd/barak/barak.go
@@ -1,4 +1,3 @@
-
 package main
 
 import (
@@ -11,10 +10,10 @@ import (
 	"sync"
 	"time"
 
+	. "github.com/tendermint/go-common"
+	pcm "github.com/tendermint/go-process"
 	"github.com/tendermint/go-wire"
 	. "github.com/tendermint/tendermint/cmd/barak/types"
-	. "github.com/tendermint/go-common"
-	pcm "github.com/tendermint/tendermint/process"
 	"github.com/tendermint/tendermint/rpc/server"
 )
 
@@ -137,7 +136,7 @@ func (brk *Barak) StopProcess(label string, kill bool) error {
 		return fmt.Errorf("Process does not exist: %v", label)
 	}
 
-	err := pcm.Stop(proc, kill)
+	err := proc.StopProcess(kill)
 	return err
 }
 
diff --git a/cmd/barak/main.go b/cmd/barak/main.go
index 0f2445478..e587871be 100644
--- a/cmd/barak/main.go
+++ b/cmd/barak/main.go
@@ -16,12 +16,12 @@ import (
 	"reflect"
 	"time"
 
-	. "github.com/tendermint/tendermint/cmd/barak/types"
 	. "github.com/tendermint/go-common"
 	cfg "github.com/tendermint/go-config"
-	pcm "github.com/tendermint/tendermint/process"
-	"github.com/tendermint/tendermint/rpc/server"
+	pcm "github.com/tendermint/go-process"
 	"github.com/tendermint/go-wire"
+	. "github.com/tendermint/tendermint/cmd/barak/types"
+	"github.com/tendermint/tendermint/rpc/server"
 )
 
 const BarakVersion = "0.0.1"
@@ -162,7 +162,7 @@ func StartProcess(wait bool, label string, execPath string, args []string, input
 	if err != nil {
 		return nil, err
 	}
-	proc, err := pcm.Create(label, execPath, args, inFile, outFile)
+	proc, err := pcm.StartProcess(label, execPath, args, inFile, outFile)
 	if err != nil {
 		return nil, err
 	}
diff --git a/cmd/barak/types/responses.go b/cmd/barak/types/responses.go
index 40ea1eb25..dab26f75d 100644
--- a/cmd/barak/types/responses.go
+++ b/cmd/barak/types/responses.go
@@ -1,7 +1,7 @@
 package types
 
 import (
-	pcm "github.com/tendermint/tendermint/process"
+	pcm "github.com/tendermint/go-process"
 )
 
 type ResponseStatus struct {
diff --git a/process/process.go b/process/process.go
deleted file mode 100644
index 5c27f14eb..000000000
--- a/process/process.go
+++ /dev/null
@@ -1,75 +0,0 @@
-package process
-
-import (
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"time"
-)
-
-type Process struct {
-	Label      string
-	ExecPath   string
-	Args       []string
-	Pid        int
-	StartTime  time.Time
-	EndTime    time.Time
-	Cmd        *exec.Cmd        `json:"-"`
-	ExitState  *os.ProcessState `json:"-"`
-	InputFile  io.Reader        `json:"-"`
-	OutputFile io.WriteCloser   `json:"-"`
-	WaitCh     chan struct{}    `json:"-"`
-}
-
-// execPath: command name
-// args: args to command. (should not include name)
-func Create(label string, execPath string, args []string, inFile io.Reader, outFile io.WriteCloser) (*Process, error) {
-	cmd := exec.Command(execPath, args...)
-	cmd.Stdout = outFile
-	cmd.Stderr = outFile
-	cmd.Stdin = inFile
-	if err := cmd.Start(); err != nil {
-		return nil, err
-	}
-	proc := &Process{
-		Label:      label,
-		ExecPath:   execPath,
-		Args:       args,
-		Pid:        cmd.Process.Pid,
-		StartTime:  time.Now(),
-		Cmd:        cmd,
-		ExitState:  nil,
-		InputFile:  inFile,
-		OutputFile: outFile,
-		WaitCh:     make(chan struct{}),
-	}
-	go func() {
-		err := proc.Cmd.Wait()
-		if err != nil {
-			fmt.Printf("Process exit: %v\n", err)
-			if exitError, ok := err.(*exec.ExitError); ok {
-				proc.ExitState = exitError.ProcessState
-			}
-		}
-		proc.ExitState = proc.Cmd.ProcessState
-		proc.EndTime = time.Now() // TODO make this goroutine-safe
-		err = proc.OutputFile.Close()
-		if err != nil {
-			fmt.Printf("Error closing output file for %v: %v\n", proc.Label, err)
-		}
-		close(proc.WaitCh)
-	}()
-	return proc, nil
-}
-
-func Stop(proc *Process, kill bool) error {
-	defer proc.OutputFile.Close()
-	if kill {
-		fmt.Printf("Killing process %v\n", proc.Cmd.Process)
-		return proc.Cmd.Process.Kill()
-	} else {
-		fmt.Printf("Stopping process %v\n", proc.Cmd.Process)
-		return proc.Cmd.Process.Signal(os.Interrupt)
-	}
-}