remove_old_html.py

   1 #! /usr/bin/env python
   2
   3 __author__ = "Oleg Broytman <phd@phdru.name>"
   4 __copyright__ = "Copyright (C) 2020 PhiloSoft Design"
   5
   6 import os
   7 from blog_db import blog_root, load_blog
   8 blog = load_blog()
   9
  10 # Run a loop over the blog posts:
  11 # for every post note its previous and next posts
  12 # and compare timestamps of previous and next HTML
  13 # with the timestamp of the current template;
  14 # if HTMLs are older - remove them,
  15 # they will be regenerated with the corrected back/forth links.
  16
  17
  18 def fullpath(key, post):
  19     return os.path.join(*(blog_root,) + key + (post[0],))
  20
  21
  22 def html(tmpl):
  23     return tmpl[:-len('tmpl')] + 'html'
  24
  25
  26 prev_key = prev_blog_post = current_key = current_blog_post = \
  27     next_key = next_blog_post = None
  28 for key in sorted(blog):
  29     for blog_post in sorted(blog[key]):
  30         if current_blog_post:
  31             prev_key = current_key
  32             prev_blog_post = current_blog_post
  33         if next_blog_post:
  34             current_key = next_key
  35             current_blog_post = next_blog_post
  36         next_key = key
  37         next_blog_post = blog_post
  38
  39         if current_key:
  40             current_tmpl = fullpath(current_key, current_blog_post)
  41             try:
  42                 current_mtime = os.path.getmtime(current_tmpl)
  43             except OSError:
  44                 current_mtime = None
  45
  46         if prev_key:
  47             prev_html = html(fullpath(prev_key, prev_blog_post))
  48             try:
  49                 prev_mtime = os.path.getmtime(prev_html)
  50             except OSError:
  51                 pass
  52             else:
  53                 if current_mtime is not None and (prev_mtime < current_mtime):
  54                     os.remove(prev_html)
  55         if current_key and next_key:
  56             next_html = html(fullpath(next_key, next_blog_post))
  57             try:
  58                 next_mtime = os.path.getmtime(next_html)
  59             except OSError:
  60                 pass
  61             else:
  62                 if current_mtime is not None and (next_mtime < current_mtime):
  63                     os.remove(next_html)
  64
  65 current_tmpl = fullpath(key, blog_post)
  66 try:
  67     current_mtime = os.path.getmtime(current_tmpl)
  68 except OSError:
  69     pass
  70 else:
  71     current_mtime = None
  72
  73 prev_html = html(fullpath(current_key, current_blog_post))
  74 try:
  75     prev_mtime = os.path.getmtime(prev_html)
  76 except OSError:
  77     pass
  78 else:
  79     if current_mtime is not None and (prev_mtime < current_mtime):
  80         os.remove(prev_html)