Use the suffix so that the file is actually highlighted correctly

dennogumi_new_post.py

@@ -6,9 +6,10 @@ import argparse
 from datetime import datetime
 from pathlib import Path
 from subprocess import call
+import shutil
 from typing import List
 
-from atomicwrites import atomic_write
+from atomicwrites import atomic_write, AtomicWriter
 import frontmatter
 from git import Repo
 import sarge
@@ -36,7 +37,8 @@ def commit_initial_post(post_title: str, post_filename: str):
 def edit_post(post_path):
 
     with post_path.open() as handle:
-        with atomic_write(str(post_path), overwrite=True) as writer:
+        with atomic_write(str(post_path), overwrite=True,
+                          suffix=".md") as writer:
             writer.write(handle.read())
             writer.write("\n\n")
             writer.flush()
@@ -50,10 +52,18 @@ def create_post(post_title: str, tags: List[str] = None,
                 categories: List[str] = None,
                 comments: bool = True,
                 draft: bool = True) -> Path or None:
-    cmd = ["hugo", "new", "-k", "posts", "--quiet"]
+
+    hugo_cmd = shutil.which("hugo")
+
+    if hugo_cmd is None:
+        print("hugo executable not found in PATH.")
+        return
+
+    cmd = [hugo_cmd, "new", "-k", "posts", "--quiet"]
     title = new_post_title(post_title)
     path = Path(POST_PATH) / title
     cmd.append(str(path))
+    print(" ".join(cmd))
 
     pid = sarge.run(cmd)