Add ability override container root command.

infrastructures/kubernetes/src/main/java/org/eclipse/che/workspace/infrastructure/kubernetes/wsplugins/K8sContainerResolver.java

@@ -62,6 +62,8 @@ public Container resolve() throws InfrastructureException {
             .withName(buildContainerName(cheContainer.getName()))
             .withEnv(toK8sEnv(cheContainer.getEnv()))
             .withPorts(getContainerPorts())
+            .withCommand(cheContainer.getCommand())
+            .withArgs(cheContainer.getArgs())
             .build();
 
     provisionMemoryLimit(container, cheContainer);

infrastructures/kubernetes/src/test/java/org/eclipse/che/workspace/infrastructure/kubernetes/wsplugins/KubernetesPluginsToolingApplierTest.java

@@ -312,6 +312,106 @@ public void addToolingInitContainerToAPod() throws Exception {
     verifyContainer(toolingInitContainer);
   }
 
+  @Test
+  public void addToolingInitContainerWithCommand() throws InfrastructureException {
+    List<String> command = Arrays.asList("cp", "-rf", "test-file", "/some-volume/test");
+    lenient().when(podSpec.getInitContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> initContainers = singletonList(createContainer(command, null));
+    chePlugin.setInitContainers(initContainers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndInitContainersNumber(1);
+    Container toolingInitContainer = getOnlyOneInitContainerFromPod(internalEnvironment);
+    verifyContainer(toolingInitContainer);
+    assertEquals(toolingInitContainer.getCommand(), command);
+  }
+
+  @Test
+  public void addToolingInitContainerWithArgs() throws InfrastructureException {
+    List<String> args = Arrays.asList("cp", "-rf", "test-file", "/some-volume/test");
+    lenient().when(podSpec.getInitContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> initContainers = singletonList(createContainer(null, args));
+    chePlugin.setInitContainers(initContainers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndInitContainersNumber(1);
+    Container toolingInitContainer = getOnlyOneInitContainerFromPod(internalEnvironment);
+    verifyContainer(toolingInitContainer);
+    assertEquals(toolingInitContainer.getArgs(), args);
+  }
+
+  @Test
+  public void addToolingInitContainerWithCommandAndArgs() throws InfrastructureException {
+    List<String> command = singletonList("cp");
+    List<String> args = Arrays.asList("-rf", "test-file", "/some-volume/test");
+    lenient().when(podSpec.getInitContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> initContainers = singletonList(createContainer(command, args));
+    chePlugin.setInitContainers(initContainers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndInitContainersNumber(1);
+    Container toolingInitContainer = getOnlyOneInitContainerFromPod(internalEnvironment);
+    verifyContainer(toolingInitContainer);
+    assertEquals(toolingInitContainer.getCommand(), command);
+    assertEquals(toolingInitContainer.getArgs(), args);
+  }
+
+  @Test
+  public void addToolingContainerWithCommand() throws InfrastructureException {
+    List<String> command = Arrays.asList("tail", "-f", "/dev/null");
+    lenient().when(podSpec.getContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> containers = singletonList(createContainer(command, null));
+    chePlugin.setContainers(containers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndContainersNumber(1);
+    Container toolingContainer = getOneAndOnlyNonUserContainer(internalEnvironment);
+    verifyContainer(toolingContainer);
+    assertEquals(toolingContainer.getCommand(), command);
+  }
+
+  @Test
+  public void addToolingContainerWithArgs() throws InfrastructureException {
+    List<String> args = Arrays.asList("tail", "-f", "/dev/null");
+    lenient().when(podSpec.getContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> containers = singletonList(createContainer(null, args));
+    chePlugin.setContainers(containers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndContainersNumber(1);
+    Container toolingContainer = getOneAndOnlyNonUserContainer(internalEnvironment);
+    verifyContainer(toolingContainer);
+    assertEquals(toolingContainer.getArgs(), args);
+  }
+
+  @Test
+  public void addToolingContainerWithCommandAndArgs() throws InfrastructureException {
+    List<String> command = singletonList("tail");
+    List<String> args = Arrays.asList("-f", "/dev/null");
+    lenient().when(podSpec.getContainers()).thenReturn(new ArrayList<>());
+    ChePlugin chePlugin = createChePlugin();
+    List<CheContainer> containers = singletonList(createContainer(command, args));
+    chePlugin.setContainers(containers);
+
+    applier.apply(runtimeIdentity, internalEnvironment, singletonList(chePlugin));
+
+    verifyPodAndContainersNumber(1);
+    Container toolingContainer = getOneAndOnlyNonUserContainer(internalEnvironment);
+    verifyContainer(toolingContainer);
+    assertEquals(toolingContainer.getCommand(), command);
+    assertEquals(toolingContainer.getArgs(), args);
+  }
+
   @Test
   public void createsPodAndAddToolingIfNoPodIsPresent() throws Exception {
     internalEnvironment = spy(KubernetesEnvironment.builder().build());
@@ -670,6 +770,14 @@ private ChePlugin createChePlugin(String name, CheContainer... containers) {
     return plugin;
   }
 
+  private CheContainer createContainer(List<String> command, List<String> args) {
+    CheContainer container = createContainer();
+    container.setCommand(command);
+    container.setArgs(args);
+
+    return container;
+  }
+
   private CheContainer createContainer(Command... commands) {
     return createContainer(generate("container", 5), commands);
   }

wsmaster/che-core-api-workspace/src/main/java/org/eclipse/che/api/workspace/server/wsplugins/model/CheContainer.java

@@ -37,6 +37,12 @@ public class CheContainer {
   @JsonProperty("mountSources")
   private boolean mountSources = false;
 
+  @JsonProperty("command")
+  private List<String> command;
+
+  @JsonProperty("args")
+  private List<String> args;
+
   public CheContainer image(String image) {
     this.image = image;
     return this;
@@ -156,6 +162,38 @@ public void setMountSources(boolean mountSources) {
     this.mountSources = mountSources;
   }
 
+  public CheContainer command(List<String> command) {
+    this.command = command;
+    return this;
+  }
+
+  public List<String> getCommand() {
+    if (command == null) {
+      return new ArrayList<>();
+    }
+    return command;
+  }
+
+  public void setCommand(List<String> command) {
+    this.command = command;
+  }
+
+  public CheContainer args(List<String> args) {
+    this.args = args;
+    return this;
+  }
+
+  public List<String> getArgs() {
+    if (args == null) {
+      return new ArrayList<>();
+    }
+    return args;
+  }
+
+  public void setArgs(List<String> args) {
+    this.args = args;
+  }
+
   @Override
   public boolean equals(Object o) {
     if (this == o) {
@@ -172,7 +210,9 @@ public boolean equals(Object o) {
         && Objects.equals(getPorts(), that.getPorts())
         && Objects.equals(getMemoryLimit(), that.getMemoryLimit())
         && Objects.equals(getName(), that.getName())
-        && isMountSources() == that.isMountSources();
+        && isMountSources() == that.isMountSources()
+        && Objects.equals(getCommand(), that.getCommand())
+        && Objects.equals(getArgs(), that.getArgs());
   }
 
   @Override
@@ -185,7 +225,9 @@ public int hashCode() {
         getPorts(),
         getMemoryLimit(),
         getName(),
-        isMountSources());
+        isMountSources(),
+        getCommand(),
+        getArgs());
   }
 
   @Override
@@ -208,6 +250,10 @@ public String toString() {
         + name
         + ", mountSources="
         + mountSources
+        + ", command="
+        + command
+        + ", args="
+        + args
         + '}';
   }
 }