Determine last file edit in templates to compare against public files.

Author: yaph

logya/commands.py

@@ -6,7 +6,7 @@
 
 from logya.content import write_collection, write_page
 from logya.core import Logya
-from logya.util import paths
+from logya.util import latest_file_change, paths
 
 
 def clean(dir_site: str, verbose: bool, **_kwargs) -> None:
@@ -73,7 +73,7 @@ def generate(dir_site: str, verbose: bool, **_kwargs):
     L = Logya(dir_site=dir_site, verbose=verbose)
     L.build()
 
-    mtime_templates = L.paths.templates.stat().st_mtime
+    mtime_templates = latest_file_change(L.paths.templates.as_posix())
 
     print(f'Generate site in directory: {L.paths.public.as_posix()}')
     if L.paths.static.exists():

logya/util.py

@@ -1,3 +1,4 @@
+import os
 import re
 import sys
 from functools import lru_cache
@@ -65,3 +66,27 @@ def slugify(s: str) -> str:
     Different input strings may result in the same output.
     """
     return re.sub(re_forbidden, '-', s.strip()).strip('-')
+
+
+def latest_file_change(root: str):
+    """Return mtime of the most recently edited file in root."""
+
+    latest_mtime = 0.0
+
+    def walk_dir(path):
+        with os.scandir(path) as it:
+            for entry in it:
+                if entry.is_dir(follow_symlinks=False):
+                    yield from walk_dir(entry.path)
+                else:
+                    yield entry
+
+    for entry in walk_dir(root):
+        try:
+            mtime = entry.stat().st_mtime
+        except FileNotFoundError: # skip race condition
+            continue
+        if mtime > latest_mtime:
+            latest_mtime = mtime
+
+    return latest_mtime