Enable creation of an Ubuntu snap

.gitignore

@@ -37,6 +37,9 @@ ui/
 node_modules/
 npm-debug.log
 
+# snapcraft
+parts/
+
 # UNKNWON
 jabref.xml
 *.sonargraph

.travis.yml

@@ -9,16 +9,19 @@ sudo: required
 services:
   - postgresql
   - mysql
+  - docker
 
 env:
   global:
     - GRADLE_OPTS=-Dorg.gradle.daemon=false
+    - TERM=dumb
   matrix:
     - TEST_SUITE=check OPTIONS=modernizer
     - TEST_SUITE=fetcherTest
     - TEST_SUITE=databaseTest
     - TEST_SUITE=guiTest
     - TEST_SUITE=checkstyle
+    - TEST_SUITE=snapcraft
 
 matrix:
     fast_finish: true
@@ -40,14 +43,14 @@ before_script:
 script:
   # --scan enables the Gradle build scan, which can be used to investiage the time each action consumes
   # For more information see https://gradle.com/scans/get-started
-  - if [ "$TEST_SUITE" != "guiTest" ] && [ "$TEST_SUITE" != "checkstyle" ]; then ./gradlew $TEST_SUITE $OPTIONS --scan; fi
+  - if [ "$TEST_SUITE" != "checkstyle" ] && [ "$TEST_SUITE" != "guiTest" ] && [ "$TEST_SUITE" != "snapcraft" ]; then ./gradlew $TEST_SUITE $OPTIONS --scan; fi
   - if [ "$TEST_SUITE" == "checkstyle" ]; then ./gradlew checkstyleMain checkstyleTest checkstyleJmh; fi
   - if [ "$TEST_SUITE" == "guiTest" ]; then ./buildres/gui-tests.sh; fi
 
 after_success:
   # enable codecov report
-  - ./gradlew jacocoTestReport
-  - bash <(curl -s https://codecov.io/bash)
+  - if [ "$TEST_SUITE" != "checkstyle" ] && [ "$TEST_SUITE" != "snapcraft" ]; then ./gradlew jacocoTestReport && bash <(curl -s https://codecov.io/bash); fi
+  - if [ "$TRAVIS_BRANCH" == "snapcraft" ] && [ "$TEST_SUITE" == "snapcraft" ]; then openssl aes-256-cbc -K $encrypted_5f91cda8b19d_key -iv $encrypted_5f91cda8b19d_iv -in .snapcraft/travis_snapcraft.cfg -out .snapcraft/snapcraft.cfg -d && sh ./scripts/run-snapcraft.sh; fi
 
 after_failure:
   # show test results if build fails

build.gradle

@@ -153,6 +153,8 @@ sourceSets {
 }
 
 processResources {
+    filteringCharset = 'UTF-8'
+
     filesMatching("build.properties") {
         expand(version: project.version,
                 "year": String.valueOf(Calendar.getInstance().get(Calendar.YEAR)),
@@ -161,7 +163,6 @@ processResources {
                 "azureInstrumentationKey": System.getenv('AzureInstrumentationKey'))
         filteringCharset = 'UTF-8'
     }
-    filteringCharset = 'UTF-8'
 
     filesMatching("resource/**/meta.xml") {
         expand version: project.version
@@ -368,19 +369,22 @@ task release(dependsOn: ["media", "releaseJar"]) {
 task releaseJar(dependsOn: "shadowJar") {
     group = 'JabRef - Release'
     description "Creates a Jar release."
-
     doLast {
         copy {
             from("$buildDir/libs/JabRef-${project.version}-fat.jar")
             into("$buildDir/releases")
-
             rename { String fileName ->
                 fileName.replace('-fat', '')
             }
         }
+        file("$buildDir/releases/JabRef-${project.version}.jar").setExecutable(true, true);
     }
 }
 
+task snapJar(dependsOn: "releaseJar", type: Delete) {
+    delete fileTree(dir: "$buildDir/releases/", exclude: "JabRef-${project.version}.jar")
+}
+
 jmh {
     warmupIterations = 5
     iterations = 10

scripts/run-snapcraft.sh

@@ -0,0 +1,4 @@
+#/bin/bash
+VERSION=`grep "^version =" build.gradle | sed "s/^version = \"\(.*\)\".*/\1/"`
+sed -i "s/4.0-dev/$VERSION/" snapcraft.yaml
+docker run -v $(pwd):$(pwd) -t koppor/docker-snapcraft-java-de:v1.2.0 sh -c "cd $(pwd) && LANG=C.UTF-8 LC_ALL=C.UTF-8 snapcraft && LANG=C.UTF-8 LC_ALL=C.UTF-8 snapcraft push *.snap --release edge"

snapcraft.yaml

@@ -0,0 +1,22 @@
+# based on https://github.com/snapcore/snapcraft/blob/master/demos/gradle/snap/snapcraft.yaml
+
+name: jabref
+version: '4.0-dev'
+summary: Bibliography manager
+icon: src/main/resources/images/external/JabRef-icon-128.png
+description: JabRef is an open source bibliography reference manager. The native file format used by JabRef is BibTeX, the standard LaTeX bibliography format.
+
+grade: devel # must be 'stable' to release into candidate/stable channels
+confinement: devmode # use 'strict' once you have the right plugs and slots
+
+apps:
+   jabref:
+     command: java -jar $SNAP/jar/JabRef-4.0-dev.jar
+
+parts:
+  jabref:
+    plugin: gradle
+    source: .
+    stage-packages: [default-jre, openjfx]
+    gradle-options: [snapJar]
+    gradle-output-dir: 'build/releases'