From 5a4803a3d794d44b17c305ed85143aa981d1396f Mon Sep 17 00:00:00 2001
From: Cotes Chung <11371340+cotes2020@users.noreply.github.com>
Date: Mon, 18 Nov 2019 21:36:45 +0800
Subject: [PATCH] Add new feature to lastmod script tool.

---
 _scripts/py/update_posts_lastmod.py | 109 ++++++++++++++++++++--------
 1 file changed, 77 insertions(+), 32 deletions(-)

diff --git a/_scripts/py/update_posts_lastmod.py b/_scripts/py/update_posts_lastmod.py
index fb5db8b..be3e781 100755
--- a/_scripts/py/update_posts_lastmod.py
+++ b/_scripts/py/update_posts_lastmod.py
@@ -16,58 +16,81 @@ Licensed under MIT
 import sys
 import glob
 import os
+import getopt
 import subprocess
 import shutil
+import datetime
+import time
 
+from enum import Enum
 from ruamel.yaml import YAML
+
 from utils.common import get_yaml
 from utils.common import check_py_version
 
 
-POSTS_PATH = "_posts"
+Date = Enum('Date', ('GIT', 'FS'))
+
+POSTS_PATH = '_posts'
 
 
 def help():
     print("Usage: "
-          "   python update_posts_lastmod.py [option]\n"
+          "   python update_posts_lastmod.py [options]\n"
           "Options:\n"
-          "   -v, --verbose      Print verbose logs\n")
+          "   -f, --file  <file path>        Read a file.\n"
+          "   -d, --dir   <directory path>   Read from a directory.\n"
+          "   -h, --help                     Print help information\n"
+          "   -v, --verbose                  Print verbose logs\n"
+          "   -t, --datetime  < git | fs >   Chose post's datetime source, "
+          "'git' for git-log, 'fs' for filesystem, default to 'git'.\n")
 
 
-def update_lastmod(verbose):
+def update_lastmod(path, verbose, date):
     count = 0
     yaml = YAML()
 
-    for post in glob.glob(os.path.join(POSTS_PATH, "*.md")):
-        git_log_count = subprocess.getoutput(
-            "git log --pretty=%ad \"{}\" | wc -l".format(post))
+    for post in glob.glob(path):
 
-        if git_log_count == "1":
-            continue
+        lastmod = ''
 
-        git_lastmod = subprocess.getoutput(
-            "git log -1 --pretty=%ad --date=iso \"{}\"".format(post))
+        if date == Date.GIT:
+            git_log_count = subprocess.getoutput(
+                "git log --pretty=%ad \"{}\" | wc -l".format(post))
 
-        if not git_lastmod:
-            continue
+            if git_log_count == "1":
+                continue
 
-        lates_commit = subprocess.check_output(
-            ['git', 'log', '-1', '--pretty=%B', post]).decode('utf-8')
+            git_lastmod = subprocess.getoutput(
+                "git log -1 --pretty=%ad --date=iso \"{}\"".format(post))
 
-        if "[Automation]" in lates_commit and "Lastmod" in lates_commit:
-            continue
+            if not git_lastmod:
+                continue
+
+            lates_commit = subprocess.check_output(
+                ['git', 'log', '-1', '--pretty=%B', post]).decode('utf-8')
+
+            if "[Automation]" in lates_commit and "Lastmod" in lates_commit:
+                continue
+
+            lastmod = git_lastmod
+
+        elif date == Date.FS:
+            t = os.path.getmtime(post)
+            dt = datetime.datetime.fromtimestamp(t)
+            lastmod = dt.strftime('%F %T') + time.strftime(' %z')
 
         frontmatter, line_num = get_yaml(post)
         meta = yaml.load(frontmatter)
 
         if 'seo' in meta:
             if ('date_modified' in meta['seo'] and
-                    meta['seo']['date_modified'] == git_lastmod):
+                    meta['seo']['date_modified'] == lastmod):
                 continue
             else:
-                meta['seo']['date_modified'] = git_lastmod
+                meta['seo']['date_modified'] = lastmod
         else:
-            meta.insert(line_num, 'seo', dict(date_modified=git_lastmod))
+            meta.insert(line_num, 'seo', dict(date_modified=lastmod))
 
         output = 'new.md'
         if os.path.isfile(output):
@@ -99,23 +122,45 @@ def update_lastmod(verbose):
         print("[INFO] Success to update lastmod for {} post(s).".format(count))
 
 
-def main():
+def main(argv):
     check_py_version()
 
+    path = os.path.join(POSTS_PATH, "*.md")
     verbose = False
+    date = Date.GIT
 
-    if len(sys.argv) > 1:
-        for arg in sys.argv:
-            if arg == sys.argv[0]:
-                continue
+    try:
+        opts, args = getopt.getopt(
+            argv, "hf:d:vt:",
+            ["file=", "dir=", "help", "verbose", "datetime="])
+    except getopt.GetoptError:
+        help()
+        sys.exit(2)
+
+    for opt, arg in opts:
+        if opt == '-h':
+            help()
+            sys.exit()
+
+        elif opt == '-f' or opt == '--file':
+            path = arg
+
+        elif opt == '-d' or opt == '--dir':
+            path = os.path.join(arg, "*.md")
+
+        elif opt == '-v' or opt == '--verbose':
+            verbose = True
+
+        elif opt == '-t' or opt == '--datetime':
+            if arg == 'git':
+                date = Date.GIT
+            elif arg == 'fs':
+                date = Date.FS
             else:
-                if arg == '-v' or arg == '--verbose':
-                    verbose = True
-                else:
-                    help()
-                    return
+                help()
+                sys.exit(2)
 
-    update_lastmod(verbose)
+    update_lastmod(path, verbose, date)
 
 
-main()
+main(sys.argv[1:])