Adding some cover images to make it a little more fun... I chose the …

…playpus because like CP-SAT combines many techniques, the platypus combines various animals.

00_intro.md

@@ -2,6 +2,8 @@
 
 # Using and Understanding OR-Tools' CP-SAT: A Primer and Cheat Sheet
 
+![Cover Image](./images/logo_1.webp)
+
 _By [Dominik Krupke](https://krupke.cc), TU Braunschweig_
 
 Many [combinatorially difficult](https://en.wikipedia.org/wiki/NP-hardness)

04_modelling.md

@@ -4,6 +4,8 @@
 
 ## Modelling
 
+![Cover Image Modelling](./images/logo_2.webp)
+
 CP-SAT provides us with much more modelling options than the classical
 MIP-solver. Instead of just the classical linear constraints (<=, ==, >=), we
 have various advanced constraints such as `AllDifferent` or

05_parameters.md

@@ -4,6 +4,8 @@
 
 ## Parameters
 
+![Cover Image Parameters](./images/logo_3.webp)
+
 The CP-SAT solver has a lot of parameters to control its behavior. They are
 implemented via
 [Protocol Buffer](https://developers.google.com/protocol-buffers) and can be

README.md

@@ -4,6 +4,8 @@
 
 # Using and Understanding OR-Tools' CP-SAT: A Primer and Cheat Sheet
 
+![Cover Image](./images/logo_1.webp)
+
 _By [Dominik Krupke](https://krupke.cc), TU Braunschweig_
 
 Many [combinatorially difficult](https://en.wikipedia.org/wiki/NP-hardness)
@@ -570,6 +572,8 @@ in many - is remarkable for a tool that is both free and open-source.
 
 ## Modelling
 
+![Cover Image Modelling](./images/logo_2.webp)
+
 CP-SAT provides us with much more modelling options than the classical
 MIP-solver. Instead of just the classical linear constraints (<=, ==, >=), we
 have various advanced constraints such as `AllDifferent` or
@@ -1768,6 +1772,8 @@ If you need more, you can check out the
 
 ## Parameters
 
+![Cover Image Parameters](./images/logo_3.webp)
+
 The CP-SAT solver has a lot of parameters to control its behavior. They are
 implemented via
 [Protocol Buffer](https://developers.google.com/protocol-buffers) and can be

build.py

@@ -33,9 +33,7 @@ def convert_for_mdbook(content):
     # you have to replace the `#` with `./` and `-` with `_`, and attach `.md` at the end.
     def replace_relative(match):
         md_path = match.group(1).replace("-", "_") + ".md"
-        if Path(md_path).exists():
-            return f"(./{md_path})"
-        return f"(#{match.group(1)})"
+        return f"(./{md_path})" if Path(md_path).exists() else f"(#{match.group(1)})"
 
     content = re.sub(
         r"\(#(.*?)\)",
@@ -67,6 +65,14 @@ def replace_relative(match):
         ),
         content,
     )
+    content = re.sub(
+        r"\((.*?\.webp)\)",
+        lambda match: match.group(0).replace(
+            "https://github.com/d-krupke/cpsat-primer/blob/main/",
+            "https://raw.githubusercontent.com/d-krupke/cpsat-primer/main/",
+        ),
+        content,
+    )
 
     content += footer
     return content