Use a consistent blog post url format

Author: coolreader18

Gemfile

@@ -16,6 +16,7 @@ gem "minima", "~> 2.5"
 # If you have any plugins, put them here!
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.12"
+  gem "jekyll-redirect-from", "0.16"
 end
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem

Gemfile.lock

@@ -31,6 +31,8 @@ GEM
       terminal-table (~> 2.0)
     jekyll-feed (0.15.1)
       jekyll (>= 3.7, < 5.0)
+    jekyll-redirect-from (0.16.0)
+      jekyll (>= 3.3, < 5.0)
     jekyll-sass-converter (2.1.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-seo-tag (2.7.1)
@@ -77,6 +79,7 @@ PLATFORMS
 DEPENDENCIES
   jekyll (~> 4.2.0)
   jekyll-feed (~> 0.12)
+  jekyll-redirect-from (= 0.16)
   minima (~> 2.5)
   tzinfo (~> 1.2)
   tzinfo-data

_config.yml

@@ -31,6 +31,8 @@ show_excerpts: true
 contributor_excerpt: "" # TODO: write something here, goes right under "Contributors" heading
 blog-intro: Create an issue if you see something wrong. Edit posts or create new ones via PR on <a target="_blank" href="https://github.com/RustPython/rustpython.github.io">github.com/RustPython/rustpython.github.io</a>
 
+permalink: /blog/:year/:month/:day/:title:output_ext
+
 navigation:
   - title: Blog
     url: /blog
@@ -49,6 +51,7 @@ dashboards:
 theme: minima
 plugins:
   - jekyll-feed
+  - jekyll-redirect-from
 
 # Exclude from processing.
 # The following items will not be processed, by default.

_posts/2020-03-12-thing-explainer-parser.markdown

@@ -2,6 +2,7 @@
 layout: post
 title:  "Introduction to the RustPython parser"
 date:   2020-04-02 11:34:01 -0400
+redirect_from: /2020/04/02/thing-explainer-parser.html
 ---
 
 This post goes over the RustPython parser. You can see the source code at [RustPython/parser/](https://github.com/RustPython/RustPython/tree/master/parser).

_posts/2020-04-05-how-to-contribute-by-cpython-unittest.markdown

@@ -3,7 +3,7 @@ layout: post
 title:  "How to contribute to RustPython using CPython's unit tests"
 date:   2020-04-05 01:45:00 +0900
 categories: [guideline, featured]
-permalink:  guideline/2020/04/04/how-to-contribute-by-cpython-unittest.html
+redirect_from: /guideline/2020/04/04/how-to-contribute-by-cpython-unittest.html
 ---
 
 At the very end of 2019, we finally reached one of our short-term goals: CPython `unittest` support which makes finding CPython compatibility errors easier than ever.

_posts/2021-01-27-pip-support.markdown

@@ -3,6 +3,7 @@ layout: post
 title:  "pip is working! 🎉  🎉 "
 date:   2021-01-27 01:45:00 +0900
 categories: [featured]
+redirect_from: /featured/2021/01/26/pip-support.html
 ---
 
 7380 commits and 1940 pull requests later, **pip** and **get-pip.py** are working with RustPython 🎉  🎉. pip can install itself and setuptools!