ditch mobi and simplify dependencies

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 generated/
 book.epub.d/
-book.xml
+book.xml

Gemfile

@@ -3,9 +3,7 @@
 source 'https://rubygems.org'
 
 gem 'asciidoctor'
-gem 'asciidoctor-pdf', '~> 1.5.pre'
-gem 'asciidoctor-epub3', '~> 1.5.pre'
+gem 'asciidoctor-pdf', '~> 2.3'
+gem 'asciidoctor-epub3', '~> 2.1'
 gem 'asciidoctor-diagram' # https://github.com/asciidoctor/asciidoctor-diagram
 gem 'coderay' # markdown
-gem "kindlegen", "~> 3.0"
-gem "nokogiri", "~> 1.16"

Gemfile.lock

@@ -1,49 +1,58 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    Ascii85 (1.1.1)
+    Ascii85 (2.0.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     afm (0.2.2)
-    asciidoctor (2.0.8)
-    asciidoctor-diagram (1.5.16)
-      asciidoctor (>= 1.5.0, < 3.x)
-    asciidoctor-epub3 (1.5.1)
-      asciidoctor (>= 1.5.6, < 3.0.0)
+    asciidoctor (2.0.23)
+    asciidoctor-diagram (2.3.1)
+      asciidoctor (>= 1.5.7, < 3.x)
+      asciidoctor-diagram-ditaamini (~> 1.0)
+      asciidoctor-diagram-plantuml (~> 1.2021)
+      rexml
+    asciidoctor-diagram-batik (1.17)
+    asciidoctor-diagram-ditaamini (1.0.3)
+    asciidoctor-diagram-plantuml (1.2024.8)
+      asciidoctor-diagram-batik (~> 1.17)
+    asciidoctor-epub3 (2.1.0)
+      asciidoctor (~> 2.0)
       gepub (~> 1.0.0)
       mime-types (~> 3.0)
-    asciidoctor-pdf (1.6.2)
+      sass
+    asciidoctor-pdf (2.3.14)
       asciidoctor (~> 2.0)
       concurrent-ruby (~> 1.1)
+      matrix (~> 0.4)
       prawn (~> 2.4.0)
       prawn-icon (~> 3.0.0)
-      prawn-svg (~> 0.32.0)
+      prawn-svg (~> 0.34.0)
       prawn-table (~> 0.2.0)
       prawn-templates (~> 0.1.0)
-      safe_yaml (~> 1.0.0)
       treetop (~> 1.6.0)
-    bigdecimal (3.1.8)
-    coderay (1.1.2)
-    concurrent-ruby (1.3.3)
-    css_parser (1.17.1)
+    bigdecimal (3.1.9)
+    coderay (1.1.3)
+    concurrent-ruby (1.3.4)
+    css_parser (1.21.0)
       addressable
+    ffi (1.17.1)
     gepub (1.0.17)
       nokogiri (>= 1.8.2, < 2.0)
       rubyzip (> 1.1.1, < 2.4)
     hashery (2.1.2)
-    kindlegen (3.0.3)
-      rake
-      rubyzip
-    mime-types (3.5.2)
+    logger (1.6.5)
+    matrix (0.4.2)
+    mime-types (3.6.0)
+      logger
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2024.0806)
-    mini_portile2 (2.8.7)
-    nokogiri (1.16.5)
+    mime-types-data (3.2025.0107)
+    mini_portile2 (2.8.8)
+    nokogiri (1.18.1)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     pdf-core (0.9.0)
-    pdf-reader (2.12.0)
-      Ascii85 (~> 1.0)
+    pdf-reader (2.13.0)
+      Ascii85 (>= 1.0, < 3.0, != 2.0.0)
       afm (~> 0.2.1)
       hashery (~> 2.0)
       ruby-rc4
@@ -54,8 +63,9 @@ GEM
       ttfunk (~> 1.7)
     prawn-icon (3.0.0)
       prawn (>= 1.1.0, < 3.0.0)
-    prawn-svg (0.32.0)
+    prawn-svg (0.34.2)
       css_parser (~> 1.6)
+      matrix (~> 0.4.2)
       prawn (>= 0.11.1, < 3)
       rexml (~> 3.2)
     prawn-table (0.2.2)
@@ -65,11 +75,17 @@ GEM
       prawn (~> 2.2)
     public_suffix (6.0.1)
     racc (1.8.1)
-    rake (13.0.1)
-    rexml (3.3.9)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.11.1)
+      ffi (~> 1.0)
+    rexml (3.4.0)
     ruby-rc4 (0.1.5)
-    rubyzip (2.0.0)
-    safe_yaml (1.0.5)
+    rubyzip (2.3.2)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     treetop (1.6.12)
       polyglot (~> 0.3)
     ttfunk (1.8.0)
@@ -81,11 +97,9 @@ PLATFORMS
 DEPENDENCIES
   asciidoctor
   asciidoctor-diagram
-  asciidoctor-epub3 (~> 1.5.pre)
-  asciidoctor-pdf (~> 1.5.pre)
+  asciidoctor-epub3 (~> 2.1)
+  asciidoctor-pdf (~> 2.3)
   coderay
-  kindlegen (~> 3.0)
-  nokogiri (~> 1.16)
 
 BUNDLED WITH
-   2.0.1
+   2.6.2

Makefile

@@ -4,19 +4,10 @@ install:
 	brew bundle
 	bundle install
 
-build: build-html build-pdf build-epub build-mobi
-
-build-html:
-	rm -rf generated/html/*
-	asciidoctor -r asciidoctor-diagram -b html5 -D generated/html src/book.adoc
-	mkdir -p generated/html/1-theory && cp -r src/1-theory/images generated/html/1-theory/
-	mkdir -p generated/html/2-planning && cp -r src/2-planning/images generated/html/2-planning/
+build: build-pdf build-epub
 
 build-pdf:
-	asciidoctor-pdf -r asciidoctor-diagram -a data-uri -D generated src/book.adoc
+	bundle exec asciidoctor-pdf -r asciidoctor-diagram -a data-uri -D generated src/book.adoc
 
 build-epub:
-	asciidoctor-epub3 -r asciidoctor-diagram -D generated src/book.adoc
-
-build-mobi:
-	asciidoctor-epub3 -r asciidoctor-diagram -D generated -a ebook-format=kf8 src/book.adoc
+	bundle exec asciidoctor-epub3 -r asciidoctor-diagram -D generated src/book.adoc