Add pg_jekyll script

README.md

@@ -13,7 +13,8 @@ The repository contains a collection of random scripts and short programs.
 3. [read\_logs.rb](#read_logsrb)
 4. [cross\_toolchain.rb](#cross_toolchainrb)
 5. [rename.rb](#renamerb)
-6. [tea-cleaner](#tea-cleaner)
+6. [pg\_jekyll.rb](#pg_jekyll)
+7. [tea-cleaner](#tea-cleaner)
 
 ## 7digital.rb
 
@@ -80,6 +81,17 @@ Changes the extension of all files matching a pattern in the given directory.
 Call the `rename.rb` without arguments to see the usage information and an
 example.
 
+## pg\_jekyll.rb
+
+This script was used to migrate blog posts from a PostgreSQL database to a
+static site generator in Jekyll-like format. `pg_jekyll.rb` cannot be used as
+is: the query and columns should be adjusted for a concrete case, but it can
+be a starting point and example for such a migration. Also it expects
+environment variables `USER` and `DBNAME` to be present in the environment.
+
+Pages are written into the `posts/` directory. A column named `slug` is used
+for the name with `.html` extension.
+
 ## tea-cleaner
 
 `tea-cleaner` tries to detect spam accounts on a gitea instance and can remove