go script to convert images from png to jpg

shell.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+  "fmt"
+  "log"
+  "os"
+  "os/exec"
+  "path/filepath"
+)
+
+func main() {
+  // array for base filenames
+  var base_names []string
+
+  // change into image directory
+  err := os.Chdir("image_batch")
+
+  // get all png files
+  files, err := filepath.Glob("*.png")
+
+  // create an array of base filenames
+  for _, file := range files {
+    var name = file[0:len(file)-len(filepath.Ext(file))]
+    base_names = append(base_names, name)
+  }
+
+  // convert each png image to jpg
+  for _, name := range base_names {
+    cmd := "convert"
+    args := []string{fmt.Sprintf("%s.png", name), fmt.Sprintf("%s.jpg", name)}
+    if err := exec.Command(cmd, args...).Run(); err != nil {
+      fmt.Fprintln(os.Stderr, err)
+      os.Exit(1)
+    }
+    fmt.Printf("Successfully converted %s.png to jpg\n", name)
+  }
+
+  if err != nil {
+    log.Fatal(err)
+  }
+
+  // print filenames
+  fmt.Println(filepath.Glob("*.png"))
+}