Remove all usages of Guava

build-monitor-acceptance/pom.xml

@@ -146,11 +146,6 @@
         </dependency>
         <!-- / serenity -->
 
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-            <version>31.0.1-jre</version>
-        </dependency>
         <dependency>
             <groupId>org.jdeferred</groupId>
             <artifactId>jdeferred-core</artifactId>

build-monitor-acceptance/src/main/java/com/smartcodeltd/jenkinsci/plugins/build_monitor/model/ProjectInformation.java

@@ -1,7 +1,7 @@
 package com.smartcodeltd.jenkinsci.plugins.build_monitor.model;
 
-import com.google.common.collect.ImmutableList;
-
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
@@ -19,7 +19,7 @@ public String name() {
     }
 
     public List<ProjectStatus> status() {
-        return ImmutableList.copyOf(status);
+        return Collections.unmodifiableList(new ArrayList<>(status));
     }
 
     @Override

build-monitor-acceptance/src/main/java/com/smartcodeltd/jenkinsci/plugins/build_monitor/model/ProjectStatus.java

@@ -1,11 +1,10 @@
 package com.smartcodeltd.jenkinsci.plugins.build_monitor.model;
 
-import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Sets;
-
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.EnumSet;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -37,8 +36,10 @@ public static List<ProjectStatus> fromMultiple(String cssClasses) {
         // todo: Java 8?
         List<ProjectStatus> statuses = new ArrayList<>();
 
-        for(String statusClass : Sets.intersection(projectStatusClasses(), setOf(split(cssClasses)))) {
-            statuses.add(ProjectStatus.from(statusClass));
+        for (String statusClass : projectStatusClasses()) {
+            if (setOf(split(cssClasses)).contains(statusClass)) {
+                statuses.add(ProjectStatus.from(statusClass));
+            }
         }
 
         return statuses;
@@ -66,7 +67,7 @@ private static List<String> split(String spaceSeparatedItems) {
     }
 
     private static <T> Set<T> setOf(List<T> items) {
-        return ImmutableSet.copyOf(items);
+        return Collections.unmodifiableSet(new HashSet<>(items));
     }
 
     private static <T> List<String> stringRepresentationsOf(Collection<T> items) {

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/JenkinsInstance.java

@@ -1,6 +1,5 @@
 package net.serenitybdd.integration.jenkins;
 
-import com.beust.jcommander.internal.Lists;
 import net.serenitybdd.integration.jenkins.client.JenkinsClient;
 import net.serenitybdd.integration.jenkins.environment.PluginDescription;
 import net.serenitybdd.integration.jenkins.environment.rules.ApplicativeTestRule;
@@ -17,9 +16,9 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
-import static com.google.common.collect.ImmutableList.copyOf;
 import static java.lang.String.format;
 import static java.util.Arrays.asList;
 import static net.serenitybdd.integration.utils.ListFunctions.concat;
@@ -32,9 +31,9 @@ public class JenkinsInstance implements TestRule {
 
     private JenkinsClient client = null;    // instantiated when the Jenkins server is up and running
 
-    private List<? extends ApplicativeTestRule<JenkinsInstance>> customRulesToApplyBeforeStart = Lists.newArrayList();
+    private List<? extends ApplicativeTestRule<JenkinsInstance>> customRulesToApplyBeforeStart = new ArrayList<>();
     private List<? extends ApplicativeTestRule<JenkinsInstance>> defaultRules;
-    private List<? extends ApplicativeTestRule<JenkinsInstance>> customRulesToApplyAfterStart  = Lists.newArrayList();
+    private List<? extends ApplicativeTestRule<JenkinsInstance>> customRulesToApplyAfterStart  = new ArrayList<>();
 
     /**
      * @param   pluginUnderTest
@@ -102,13 +101,13 @@ public void setPort(int portNumber) {
     }
 
     public <ATR extends ApplicativeTestRule<JenkinsInstance>> JenkinsInstance beforeStartApply(List<ATR> customRulesToBeApplied) {
-        this.customRulesToApplyBeforeStart = copyOf(customRulesToBeApplied);
+        this.customRulesToApplyBeforeStart = Collections.unmodifiableList(new ArrayList<>(customRulesToBeApplied));
 
         return this;
     }
 
     public <ATR extends ApplicativeTestRule<JenkinsInstance>> JenkinsInstance afterStartApply(List<ATR> customRulesToBeApplied) {
-        this.customRulesToApplyAfterStart = copyOf(customRulesToBeApplied);
+        this.customRulesToApplyAfterStart = Collections.unmodifiableList(new ArrayList<>(customRulesToBeApplied));
 
         return this;
     }

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/TestEnvironment.java

@@ -2,15 +2,15 @@
 
 import net.serenitybdd.integration.jenkins.environment.rules.ApplicativeTestRule;
 
+import java.util.ArrayList;
 import java.util.List;
 
-import static com.google.common.collect.Lists.newArrayList;
 import static java.util.Arrays.asList;
 
 public class TestEnvironment {
     private final JenkinsInstance instance;
-    private final List<ApplicativeTestRule<JenkinsInstance>> rulesToBeAppliedBeforeJenkinsStart = newArrayList();
-    private final List<ApplicativeTestRule<JenkinsInstance>> rulesToBeAppliedAfterJenkinsStart  = newArrayList();
+    private final List<ApplicativeTestRule<JenkinsInstance>> rulesToBeAppliedBeforeJenkinsStart = new ArrayList<>();
+    private final List<ApplicativeTestRule<JenkinsInstance>> rulesToBeAppliedAfterJenkinsStart  = new ArrayList<>();
 
     public TestEnvironment(JenkinsInstance instance) {
         this.instance = instance;

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/client/JenkinsClient.java

@@ -1,7 +1,5 @@
 package net.serenitybdd.integration.jenkins.client;
 
-import com.google.common.base.Joiner;
-
 import hudson.cli.CLI;
 import net.serenitybdd.integration.jenkins.process.JenkinsProcess;
 import org.jdeferred.Promise;
@@ -148,7 +146,7 @@ public void setExternalBuildResult(String projectName, String result) {
     }
 
     private synchronized int executeGroovy(Promise<Matcher, ?, ?> promise, String... groovyScriptLines) throws InterruptedException {
-        String script = Joiner.on(";\n").join(groovyScriptLines);
+        String script = String.join(";\n", groovyScriptLines);
 
         //TODO use RealJenkinsRule
         //return executor.call("groovy", "=").execute(withInput(script), info(logger), error(logger));

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/environment/UpdateCenter.java

@@ -1,7 +1,6 @@
 package net.serenitybdd.integration.jenkins.environment;
 
 import com.github.zafarkhaja.semver.Version;
-import com.google.common.base.Charsets;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -11,6 +10,7 @@
 import java.net.URL;
 import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Arrays;
@@ -77,7 +77,7 @@ String getUpdateVersionToUse(String jenkinsVersionString) {
     }
 
     private String stripJSONPEnvelope(Path jsonp) throws IOException {
-        return Files.readAllLines(jsonp, Charsets.UTF_8).get(1);
+        return Files.readAllLines(jsonp, StandardCharsets.UTF_8).get(1);
     }
 
     private Path download(URL link) throws IOException {

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/environment/rules/FindFreePort.java

@@ -10,7 +10,6 @@
 import java.io.IOException;
 import java.net.ServerSocket;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static java.lang.String.format;
 
 public class FindFreePort implements ApplicativeTestRule<JenkinsInstance> {
@@ -31,7 +30,9 @@ public static FindFreePort useFreePortFromTheFollowingRange(int rangeStart, int
     }
 
     public FindFreePort(int rangeStart, int rangeEnd) {
-        checkArgument(rangeStart <= rangeEnd, format("Start of the port range (%d) should be lower than the end of the range (%d)", rangeStart, rangeEnd));
+        if (rangeStart > rangeEnd) {
+          throw new IllegalArgumentException(format("Start of the port range (%d) should be lower than the end of the range (%d)", rangeStart, rangeEnd));
+        }
 
         this.rangeStart = rangeStart;
         this.rangeEnd = rangeEnd;

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/environment/rules/InstallPluginsFromDisk.java

@@ -1,6 +1,5 @@
 package net.serenitybdd.integration.jenkins.environment.rules;
 
-import com.google.common.base.Joiner;
 import net.serenitybdd.integration.jenkins.JenkinsInstance;
 import org.junit.rules.TestRule;
 import org.junit.rules.TestWatcher;
@@ -12,8 +11,8 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
+import java.util.stream.Collectors;
 
-import static com.google.common.base.Preconditions.checkArgument;
 import static java.util.Arrays.asList;
 
 public class InstallPluginsFromDisk implements ApplicativeTestRule<JenkinsInstance> {
@@ -31,7 +30,7 @@ public TestRule applyTo(final JenkinsInstance jenkins) {
             @Override
             protected void starting(Description description) {
                 Path pluginsDir = jenkins.home().resolve("plugins");
-                String plugins  = Joiner.on(", ").join(pluginsToInstall);
+                String plugins  = pluginsToInstall.stream().map(Object::toString).collect(Collectors.joining(", "));
 
                 Log.info("Installing {} into {}", plugins, pluginsDir);
 
@@ -47,7 +46,9 @@ protected void starting(Description description) {
             }
 
             private Path existing(Path plugin) {
-                checkArgument(Files.exists(plugin), String.format("Plugin file '%s' doesn't exist and couldn't be installed.", plugin));
+                if (!Files.exists(plugin)) {
+                  throw new IllegalArgumentException(String.format("Plugin file '%s' doesn't exist and couldn't be installed.", plugin));
+                }
 
                 return plugin;
             }

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/jenkins/environment/rules/InstallPluginsFromUpdateCenter.java

@@ -1,6 +1,5 @@
 package net.serenitybdd.integration.jenkins.environment.rules;
 
-import com.google.common.base.Charsets;
 import net.serenitybdd.integration.jenkins.JenkinsInstance;
 import net.serenitybdd.integration.jenkins.environment.UpdateCenter;
 import org.junit.rules.TestRule;
@@ -10,6 +9,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
@@ -47,7 +47,7 @@ private void warmUpUpdateCenterCacheFor(JenkinsInstance jenkins) {
             String json        = updateCenter.jsonFor(jenkins.version());
             Path   destination = Files.createDirectories(jenkins.home().resolve("updates")).resolve("default.json");
 
-            Files.write(destination, json.getBytes(Charsets.UTF_8));
+            Files.write(destination, json.getBytes(StandardCharsets.UTF_8));
         } catch (IOException e) {
             throw new RuntimeException("Couldn't warm up the Update Center cache", e);
         }

build-monitor-acceptance/src/main/java/net/serenitybdd/integration/utils/ListFunctions.java

@@ -1,19 +1,17 @@
 package net.serenitybdd.integration.utils;
 
-import com.beust.jcommander.internal.Lists;
-import com.google.common.collect.ImmutableList;
-
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
 public class ListFunctions {
     public static <T> List<T> concat(List<? extends T>... lists) {
         if (lists.length == 0) {
-            return Collections.EMPTY_LIST;
+            return Collections.emptyList();
         }
 
-        List<T> combined = Lists.newArrayList();
+        List<T> combined = new ArrayList<>();
 
         for (List<? extends T> list : lists) {
             combined.addAll(list);
@@ -34,6 +32,6 @@ public static <T> T head(List<T> list) {
     }
 
     public static <T> List<T> tail(List<T> list) {
-        return ImmutableList.copyOf(list.subList(1, list.size()));
+        return Collections.unmodifiableList(new ArrayList<>(list.subList(1, list.size())));
     }
 }

build-monitor-acceptance/src/main/java/net/serenitybdd/screenplay/jenkins/actions/EnterCode.java

@@ -1,6 +1,5 @@
 package net.serenitybdd.screenplay.jenkins.actions;
 
-import com.google.common.base.Joiner;
 import net.serenitybdd.screenplay.Action;
 import net.serenitybdd.screenplay.Actor;
 import net.serenitybdd.screenplay.actions.Click;
@@ -20,11 +19,11 @@ public static EnterCode asFollows(String... lines) {
     }
 
     public Action intoTheCodeMirror(Target editorField) {
-        return instrumented(EnterCodeIntoCodeMirrorEditor.class, editorField, Joiner.on(System.lineSeparator()).join(lines));
+        return instrumented(EnterCodeIntoCodeMirrorEditor.class, editorField, String.join(System.lineSeparator(), lines));
     }
 
     public Action intoThePipelineEditor(Target editorField) {
-        return instrumented(EnterCodeIntoPipelineEditor.class, editorField, Joiner.on(System.lineSeparator()).join(lines));
+        return instrumented(EnterCodeIntoPipelineEditor.class, editorField, String.join(System.lineSeparator(), lines));
     }
 
     public EnterCode(List<String> lines) {

build-monitor-acceptance/src/main/java/net/serenitybdd/screenplay/jenkins/targets/Setting.java

@@ -1,6 +1,5 @@
 package net.serenitybdd.screenplay.jenkins.targets;
 
-import com.google.common.base.Joiner;
 import net.serenitybdd.screenplay.targets.Target;
 
 import static java.lang.String.format;
@@ -18,7 +17,7 @@ private static String xpathFor(String fieldType) {
     }
 
     private static String either(String... xpaths) {
-        return Joiner.on(" | ").join(xpaths);
+        return String.join(" | ", xpaths);
     }
 
     private static String lastElementMatching(String xpath) {

build-monitor-acceptance/src/main/java/net/serenitybdd/screenplay/jenkins/tasks/configuration/TodoList.java

@@ -1,10 +1,10 @@
 package net.serenitybdd.screenplay.jenkins.tasks.configuration;
 
-import com.beust.jcommander.internal.Lists;
 import net.serenitybdd.screenplay.Actor;
 import net.serenitybdd.screenplay.Performable;
 import net.serenitybdd.screenplay.Task;
 
+import java.util.ArrayList;
 import java.util.List;
 
 import static java.util.Arrays.asList;
@@ -42,5 +42,5 @@ private Performable[] perform(List<Performable> todos) {
         return todos.toArray(new Performable[todos.size()]);
     }
 
-    private final List<Performable> todos = Lists.newArrayList();
+    private final List<Performable> todos = new ArrayList<>();
 }

build-monitor-acceptance/src/main/java/net/serenitybdd/screenplay/jenkins/tasks/configuration/build_steps/GroovyScript.java

@@ -1,12 +1,11 @@
 package net.serenitybdd.screenplay.jenkins.tasks.configuration.build_steps;
 
-import com.google.common.base.Function;
-import com.google.common.base.Joiner;
-
 import javax.annotation.Nullable;
+import java.util.Arrays;
 import java.util.List;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
-import static com.google.common.collect.Lists.transform;
 import static java.util.Arrays.asList;
 
 public class GroovyScript {
@@ -20,13 +19,13 @@ public GroovyScript definedAs(String... lines) {
     }
 
     public GroovyScript definedAs(List<String> lines) {
-        this.code = Joiner.on('\n').join(lines);
+        this.code = String.join("\n", lines);
 
         return this;
     }
 
     public GroovyScript andOutputs(String... lines) {
-        return definedAs(transform(asList(lines), mapEachLineTo("echo \"%s\";")));
+        return definedAs(Arrays.stream(lines).map(mapEachLineTo("echo \"%s\";")).collect(Collectors.toList()));
     }
 
     public String code() {