carbon gray theme w docker and new plantuml jar

.gitignore

@@ -0,0 +1 @@
+.env

Dockerfile

@@ -0,0 +1,9 @@
+FROM openjdk:17-alpine
+RUN \
+    apk update && \
+    apk upgrade && \
+    apk add --no-cache \
+            graphviz \
+            font-noto-cjk \
+&& \
+    rm -rf /var/cache/apk/*

bin/build.sh

@@ -20,7 +20,7 @@ THEME=$1
 #PLANT=~/devcontent/bin/plantuml.1.2020.0.jar
 #PLANT=~/devcontent/bin/plantuml.1.2020.8.jar
 #PLANT=~/devcontent/bin/plantuml-beta.jar
-PLANT=bin/plantuml.1.2021.1.jar
+PLANT=bin/plantuml-1.2022.6.jar
 
 ##
 ## Build the examples for each type of diagram

bin/buildall.sh

@@ -5,7 +5,7 @@
 #PLANT=~/devcontent/bin/plantuml.1.2019.12.jar
 #PLANT=~/devcontent/bin/plantuml.1.2020.0.jar
 #PLANT=~/devcontent/bin/plantuml.1.2020.8.jar
-PLANT=bin/plantuml.1.2021.1.jar
+PLANT=bin/plantuml-1.2022.6.jar
 
 ##
 ## examples for each type of diagram

docker-compose.yml

@@ -0,0 +1,15 @@
+version: '3.3'
+
+services:
+  puml-themes:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: puml-themes
+    working_dir: /puml-themes
+    command: ['/bin/sh', '-c', '[ -z ${THEME} ] || [ ${THEME} = "all" ] && echo "set the THEME variable to build desired theme; Building all themes" && bin/buildall.sh || bin/build.sh ${THEME}']
+    volumes:
+      - .:/puml-themes
+    stdin_open: true
+    tty: true
+    privileged: true

examples/activity-ex2.puml

@@ -0,0 +1,23 @@
+@startuml
+
+!if %variable_exists("$THEME")
+title Activity Diagram - $THEME theme
+!else
+title Activity Diagram
+!endif
+
+start
+:init;
+-> test of color;
+if (color?) is (<color:red>red) then
+  :print red;
+else 
+  :print not red;
+  note right: no color
+endif
+partition End {
+  :end;
+}
+-> this is the end;
+end
+@enduml

rolling.md

@@ -25,3 +25,47 @@ This will save the images into the theme directory.
 9. Submit a pull request for the new theme, or you can host it on your own if you want.
 
 Cheers!
+
+## Using docker to trigger image build
+
+This creates a small alpine based container with graphviz and related dependencies to run the `build.sh` or `buildall.sh` commands to generate images for your theme or for all themes
+
+First build your image
+```
+docker-compose build
+```
+
+Then Create an `.env` file in your workspace with the contents as below; set the THEME variable to the name of your theme
+
+```
+# Specify theme name to be built
+# Leave blank or set to 'all' to build all themes
+THEME=
+```
+
+Example: to build the carbon-gray theme
+
+```
+# Specify theme name to be built
+# Leave blank or set to 'all' to build all themes
+THEME=carbon-gray
+```
+
+then run
+```
+docker-compose up
+```
+
+This will generate images for your specific theme or all themes if left blank
+
+You can also do the following in lieu of creating a `.env` file
+
+```
+THEME=carbon-gray docker-compose up
+```
+
+To destroy the container
+
+```
+docker-compose down
+```