Added a quick and dirty file open check

adept.go

@@ -1,12 +1,15 @@
 package main
 
 import (
+  "log"
+  "path/filepath"
   "time"
 
   "github.com/spf13/viper"
 
   "git.metaunix.net/BitGoblin/adept/config"
   "git.metaunix.net/BitGoblin/adept/transcoder"
+  "git.metaunix.net/BitGoblin/adept/util"
 )
 
 func main() {
@@ -18,7 +21,16 @@ func main() {
   for {
     ingestFiles := r.SearchIngest()
 
+    if len(ingestFiles) < 1 {
+      log.Println("There were no files found in ingest to transcode; skipping run.")
+    } else {
       for _, i := range ingestFiles {
+        // check if the file is open in another program (e.g. still being written to)
+        if util.IsFileLocked(filepath.Join(viper.GetString("transcoder.repository"), "ingest", i.Name())) {
+          log.Printf("%s appears to be open in another program; skipping it for this run.", i.Name())
+          continue
+        }
+
         // archive file
         r.ArchiveFile(i.Name())
         // transcode file
@@ -26,6 +38,7 @@ func main() {
         // clean up source file
         r.CleanupFile(i.Name())
       }
+    }
 
     // sleep for X minutes - specified in the adept.toml config file
     interval := viper.GetInt("transcoder.interval")

util/file.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+  "os/exec"
   "path"
   "strings"
 )
@@ -8,3 +9,14 @@ import (
 func FilenameWithoutExtension(filename string) string {
   return strings.TrimSuffix(filename, path.Ext(filename))
 }
+
+func IsFileLocked(filepath string) bool {
+  cmd := exec.Command("/usr/bin/lsof", filepath)
+  stdout, _ := cmd.Output()
+
+  if strings.Contains(string(stdout), filepath) {
+    return true
+  }
+
+  return false
+}