ci: don't upload JARs meant for testing only

ci/scripts/java_build.sh

@@ -56,10 +56,19 @@ main() {
         echo "=== Copying artifacts to dist dir ==="
         mkdir -p "${dist_dir}"
 
-        find "${maven_repo}" \
-             "(" -name "*.jar" -o -name "*.pom" ")" \
-             -exec echo {} ";" \
-             -exec cp {} "${dist_dir}" ";"
+        while IFS= read -r pom; do
+            if grep -Eq '<maven\.deploy\.skip>[[:space:]]*true[[:space:]]*</maven\.deploy\.skip>' "${pom}"; then
+                echo "Skipping deployment artifacts for ${pom}"
+                continue
+            fi
+
+            find "$(dirname "${pom}")" \
+                 -maxdepth 1 \
+                 -type f \
+                 "(" -name "*.jar" -o -name "*.pom" ")" \
+                 -exec echo {} ";" \
+                 -exec cp {} "${dist_dir}" ";"
+        done < <(find "${maven_repo}" -name "*.pom" -type f)
     fi
 }
 

ci/scripts/java_jar_upload.sh

@@ -71,6 +71,11 @@ SETTINGS
 
     local -r is_root='^arrow-adbc-java-root-.*'
     for pom in "$@"; do
+        if grep -Eq '<maven\.deploy\.skip>[[:space:]]*true[[:space:]]*</maven\.deploy\.skip>' "${pom}"; then
+            echo "Skipping deployment of ${pom}"
+            continue
+        fi
+
         echo "Deploying ${pom}"
         local mvnArgs=""
 

dev/release/04-java-upload.sh

@@ -65,6 +65,11 @@ main() {
     pushd "${ARROW_ARTIFACTS_DIR}"
 
     for pom in *.pom; do
+        if grep -Eq '<maven\.deploy\.skip>[[:space:]]*true[[:space:]]*</maven\.deploy\.skip>' "${pom}"; then
+            echo "Skipping deployment of ${pom}"
+            continue
+        fi
+
         base=$(basename "${pom}" .pom)
         files=()
         types=()

java/driver/flight-sql-validation/pom.xml

@@ -31,6 +31,10 @@
   <name>Arrow ADBC Driver Flight SQL Validation</name>
   <description>Tests validating the Flight SQL driver.</description>
 
+  <properties>
+    <maven.deploy.skip>true</maven.deploy.skip>
+  </properties>
+
   <dependencies>
     <dependency>
       <groupId>org.apache.arrow.adbc</groupId>