Check if the file being edited has been modified by an external program

cmd/micro/util.go

@@ -1,9 +1,11 @@
 package main
 
 import (
+	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
+	"time"
 	"unicode/utf8"
 )
 
@@ -126,6 +128,16 @@ func EscapePath(path string) string {
 	return strings.Replace(path, "/", "%", -1)
 }
 
+// GetModTime returns the last modification time for a given file
+// It also returns a boolean if there was a problem accessing the file
+func GetModTime(path string) (time.Time, bool) {
+	info, err := os.Stat(path)
+	if err != nil {
+		return time.Now(), false
+	}
+	return info.ModTime(), true
+}
+
 func runePos(p int, str string) int {
 	return utf8.RuneCountInString(str[:p])
 }