ci: build metadata-get jar buring a build (this update will be removed ones all metafiles become paert of checkstyle)

Author: romani

.gitignore

@@ -1,2 +1,4 @@
 */bin/
 */target/
+metadata-gen/
+net.sf.eclipsecs.core/lib/metadata-gen-1.0-SNAPSHOT.jar

.travis.yml

@@ -27,19 +27,19 @@ matrix:
     - jdk: openjdk8
       env:
         - DESC="install (openjdk8)"
-        - CMD="mvn install && git diff"
+        - CMD="./build-metafile-gen.sh && mvn install && git diff"
 
     # JDK 11 (Long Term Support version)
     - jdk: openjdk11
       env:
         - DESC="install (openjdk11)"
-        - CMD="mvn install && git diff"
+        - CMD="./build-metafile-gen.sh && mvn install && git diff"
 
     # JDK 13 (most recent Java version)
     - jdk: openjdk13
       env:
         - DESC="install (openjdk13)"
-        - CMD="mvn install && git diff"
+        - CMD="./build-metafile-gen.sh && mvn install && git diff"
 
 script:
   - |

build-metafile-gen.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -e
+
+rm -rf metadata-gen
+git clone https://github.com/checkstyle/metadata-gen.git
+cd metadata-gen
+mvn install -DskipTests
+cp target/metadata-gen-1.0-SNAPSHOT.jar ../net.sf.eclipsecs.core/lib/metadata-gen-1.0-SNAPSHOT.jar