--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simporter.nim	Wed Dec 06 00:05:55 2023 +0700
@@ -0,0 +1,59 @@
+import std/os
+import std/paths
+import std/dirs
+import std/osproc
+import std/cmdline
+import std/strutils
+import std/strformat
+
+import ./semicongine/core/audiotypes
+
+proc import_meshes*(files: seq[(string, string)]) =
+  let converter_script = currentSourcePath.parentDir().joinPath("scripts/blender_gltf_converter.py")
+
+  var args = @["--background", "--python", converter_script, "--"]
+  for (input, output) in files:
+    args.add input
+    args.add output
+
+  let p = startProcess("blender", args=args, options={poStdErrToStdOut, poUsePath})
+  let exitCode = p.waitForExit()
+  p.close()
+  if exitCode != 0:
+    raise newException(OSError, &"blender had exit code {exitCode}")
+
+proc import_audio*(files: seq[(string, string)]) =
+  for (input, output) in files:
+    let p = startProcess("ffmpeg", args=["-y", "-i", input, "-ar", $AUDIO_SAMPLE_RATE, output], options={poStdErrToStdOut, poUsePath})
+    let exitCode = p.waitForExit()
+    p.close()
+    if exitCode != 0:
+      raise newException(OSError, &"ffmpeg had exit code {exitCode}")
+
+when isMainModule:
+  var meshfiles: seq[(string, string)]
+  var audiofiles: seq[(string, string)]
+
+  for arg in commandLineParams():
+    if arg.count(':') != 1:
+      raise newException(Exception, &"Argument {arg} requires exactly one colon to separate input from output, but it contains {arg.count(':')} colons.")
+    let
+      input_output = arg.split(':', 1)
+      input = input_output[0]
+      output = input_output[1]
+    if not input.fileExists:
+      raise newException(IOError, &"Not found: {input}")
+    if not output.fileExists or input.fileNewer(output):
+      echo &"{output} is outdated"
+      if input.endsWith("blend"):
+        meshfiles.add (input, output)
+      elif input.endsWith("mp3") or input.endsWith("ogg") or input.endsWith("wav"):
+        audiofiles.add (input, output)
+      else:
+        raise newException(Exception, &"unkown file type: {input}")
+      Path(output.parentDir()).createDir()
+    else:
+      echo &"{output} is up-to-date"
+
+  import_meshes meshfiles
+  import_audio audiofiles