CI: cache Maven artifacts between builds

Author: ctrueden

.github/workflows/build.yml

@@ -31,6 +31,8 @@ jobs:
       with:
         java-version: '8'
         distribution: 'zulu'
+        cache: 'maven'
+        cache-dependency-path: 'appose.pom'
 
     - name: Set up uv
       run: |

appose.pom

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+This POM file is used by bin/test.sh to download and cache
+needed JAR files for the Java implementation of Appose.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>org.apposed</groupId>
+  <artifactId>appose-python</artifactId>
+  <version>0-SNAPSHOT</version>
+  <dependencies>
+    <dependency>
+      <groupId>org.apposed</groupId>
+      <artifactId>appose</artifactId>
+      <version>RELEASE</version>
+    </dependency>
+  </dependencies>
+</project>

bin/test.sh

@@ -13,23 +13,7 @@ cd "$dir/.."
 if [ ! -d target/dependency ]
 then
   echo "==> Installing appose-java..."
-  mkdir -p target
-  echo '<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-  <modelVersion>4.0.0</modelVersion>
-  <groupId>org.apposed</groupId>
-  <artifactId>appose-python</artifactId>
-  <version>0-SNAPSHOT</version>
-  <dependencies>
-    <dependency>
-      <groupId>org.apposed</groupId>
-      <artifactId>appose</artifactId>
-      <version>RELEASE</version>
-    </dependency>
-  </dependencies>
-</project>' > appose.pom
   mvn -f appose.pom dependency:copy-dependencies
-  rm appose.pom
 fi
 
 if [ $# -gt 0 ]