add: allow removing libraries in vanilla installation

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/AdditionalInstallersPage.java

@@ -20,7 +20,6 @@ package org.jackhuang.hmcl.ui.download;
 import javafx.beans.binding.Bindings;
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.SimpleBooleanProperty;
-import javafx.scene.control.Label;
 import org.jackhuang.hmcl.download.DownloadProvider;
 import org.jackhuang.hmcl.download.LibraryAnalyzer;
 import org.jackhuang.hmcl.download.RemoteVersion;
@@ -51,9 +50,20 @@ class AdditionalInstallersPage extends InstallersPage {
         txtName.setText(version.getId());
         txtName.setEditable(false);
 
-        btnInstall.disableProperty().bind(Bindings.createBooleanBinding(
+        installable.bind(Bindings.createBooleanBinding(
-                () -> !compatible.get() || !txtName.validate(),
+                () -> compatible.get() && txtName.validate(),
                 txtName.textProperty(), compatible));
+
+        InstallerPageItem[] libraries = new InstallerPageItem[]{game, fabric, forge, liteLoader, optiFine};
+
+        for (InstallerPageItem library : libraries) {
+            String libraryId = library.id;
+            if (libraryId.equals("game")) continue;
+            library.removeAction.set(e -> {
+                controller.getSettings().put(libraryId, new UpdateInstallerWizardProvider.RemoveVersionAction(libraryId));
+                reload();
+            });
+        }
     }
 
     @Override
@@ -67,11 +77,13 @@ class AdditionalInstallersPage extends InstallersPage {
     }
 
     private String getVersion(String id) {
-        return Optional.ofNullable(controller.getSettings().get(id)).map(it -> (RemoteVersion) it).map(RemoteVersion::getSelfVersion).orElse(null);
+        return Optional.ofNullable(controller.getSettings().get(id))
+                .flatMap(it -> Lang.tryCast(it, RemoteVersion.class))
+                .map(RemoteVersion::getSelfVersion).orElse(null);
     }
 
     @Override
-    public void onNavigate(Map<String, Object> settings) {
+    protected void reload() {
         LibraryAnalyzer analyzer = LibraryAnalyzer.analyze(version.resolvePreservingPatches(repository));
         String game = analyzer.getVersion(MINECRAFT).orElse(null);
         String fabric = analyzer.getVersion(FABRIC).orElse(null);
@@ -79,26 +91,28 @@ class AdditionalInstallersPage extends InstallersPage {
         String liteLoader = analyzer.getVersion(LITELOADER).orElse(null);
         String optiFine = analyzer.getVersion(OPTIFINE).orElse(null);
 
-        Label[] labels = new Label[]{lblGame, lblFabric, lblForge, lblLiteLoader, lblOptiFine};
+        InstallerPageItem[] libraries = new InstallerPageItem[]{this.game, this.fabric, this.forge, this.liteLoader, this.optiFine};
-        String[] libraryIds = new String[]{"game", "fabric", "forge", "liteloader", "optifine"};
         String[] versions = new String[]{game, fabric, forge, liteLoader, optiFine};
 
         String currentGameVersion = Lang.nonNull(getVersion("game"), game);
 
         boolean compatible = true;
-        for (int i = 0; i < libraryIds.length; ++i) {
+        for (int i = 0; i < libraries.length; ++i) {
-            String libraryId = libraryIds[i];
+            String libraryId = libraries[i].id;
             String libraryVersion = Lang.nonNull(getVersion(libraryId), versions[i]);
-            boolean alreadyInstalled = versions[i] != null;
+            boolean alreadyInstalled = versions[i] != null && !(controller.getSettings().get(libraryId) instanceof UpdateInstallerWizardProvider.RemoveVersionAction);
             if (!"game".equals(libraryId) && currentGameVersion != null && !currentGameVersion.equals(game) && getVersion(libraryId) == null && alreadyInstalled) {
                 // For third-party libraries, if game version is being changed, and the library is not being reinstalled,
                 // warns the user that we should update the library.
-                labels[i].setText(i18n("install.installer.change_version", i18n("install.installer." + libraryId), libraryVersion));
+                libraries[i].label.set(i18n("install.installer.change_version", i18n("install.installer." + libraryId), libraryVersion));
+                libraries[i].removable.set(true);
                 compatible = false;
-            } else if (alreadyInstalled || controller.getSettings().containsKey(libraryId)) {
+            } else if (alreadyInstalled || getVersion(libraryId) != null) {
-                labels[i].setText(i18n("install.installer.version", i18n("install.installer." + libraryId)) + ": " + libraryVersion);
+                libraries[i].label.set(i18n("install.installer.version", i18n("install.installer." + libraryId)) + ": " + libraryVersion);
+                libraries[i].removable.set(true);
             } else {
-                labels[i].setText(i18n("install.installer.not_installed", i18n("install.installer." + libraryId)));
+                libraries[i].label.set(i18n("install.installer.not_installed", i18n("install.installer." + libraryId)));
+                libraries[i].removable.set(false);
             }
         }
         this.compatible.set(compatible);

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/InstallersPage.java

@@ -21,15 +21,27 @@ import com.jfoenix.controls.JFXButton;
 import com.jfoenix.controls.JFXTextField;
 import com.jfoenix.effects.JFXDepthManager;
 import javafx.beans.binding.Bindings;
+import javafx.beans.property.*;
+import javafx.event.EventHandler;
 import javafx.fxml.FXML;
-import javafx.scene.Node;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Cursor;
+import javafx.scene.control.Control;
 import javafx.scene.control.Label;
-import javafx.scene.layout.StackPane;
+import javafx.scene.control.Skin;
+import javafx.scene.control.SkinBase;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.input.MouseEvent;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.HBox;
 import javafx.scene.layout.VBox;
 import org.jackhuang.hmcl.download.DownloadProvider;
 import org.jackhuang.hmcl.download.RemoteVersion;
 import org.jackhuang.hmcl.game.GameRepository;
-import org.jackhuang.hmcl.ui.FXUtils;
+import org.jackhuang.hmcl.setting.Theme;
+import org.jackhuang.hmcl.ui.SVG;
 import org.jackhuang.hmcl.ui.construct.Validator;
 import org.jackhuang.hmcl.ui.wizard.WizardController;
 import org.jackhuang.hmcl.ui.wizard.WizardPage;
@@ -40,74 +52,40 @@ import java.util.Map;
 
 import static org.jackhuang.hmcl.util.i18n.I18n.i18n;
 
-public class InstallersPage extends StackPane implements WizardPage {
+public class InstallersPage extends Control implements WizardPage {
     protected final WizardController controller;
 
-    @FXML
+    protected InstallerPageItem game = new InstallerPageItem("game");
-    protected VBox list;
+    protected InstallerPageItem fabric = new InstallerPageItem("fabric");
-
+    protected InstallerPageItem forge = new InstallerPageItem("forge");
-    @FXML
+    protected InstallerPageItem liteLoader = new InstallerPageItem("liteloader");
-    protected Node btnGame;
+    protected InstallerPageItem optiFine = new InstallerPageItem("optifine");
-
+    protected JFXTextField txtName = new JFXTextField();
-    @FXML
+    protected BooleanProperty installable = new SimpleBooleanProperty();
-    protected Node btnFabric;
-
-    @FXML
-    protected Node btnForge;
-
-    @FXML
-    protected Node btnLiteLoader;
-
-    @FXML
-    protected Node btnOptiFine;
-
-    @FXML
-    protected Label lblGame;
-
-    @FXML
-    protected Label lblFabric;
-
-    @FXML
-    protected Label lblForge;
-
-    @FXML
-    protected Label lblLiteLoader;
-
-    @FXML
-    protected Label lblOptiFine;
-
-    @FXML
-    protected JFXTextField txtName;
-
-    @FXML
-    protected JFXButton btnInstall;
 
     public InstallersPage(WizardController controller, GameRepository repository, String gameVersion, DownloadProvider downloadProvider) {
         this.controller = controller;
 
-        FXUtils.loadFXML(this, "/assets/fxml/download/installers.fxml");
-
         Validator hasVersion = new Validator(s -> !repository.hasVersion(s) && StringUtils.isNotBlank(s));
         hasVersion.setMessage(i18n("install.new_game.already_exists"));
         Validator nameValidator = new Validator(OperatingSystem::isNameValid);
         nameValidator.setMessage(i18n("install.new_game.malformed"));
         txtName.getValidators().addAll(hasVersion, nameValidator);
-        btnInstall.disableProperty().bind(Bindings.createBooleanBinding(() -> !txtName.validate(),
+        installable.bind(Bindings.createBooleanBinding(() -> txtName.validate(),
                 txtName.textProperty()));
         txtName.setText(gameVersion);
 
-        Node[] buttons = new Node[]{btnGame, btnFabric, btnForge, btnLiteLoader, btnOptiFine};
+        InstallerPageItem[] libraries = new InstallerPageItem[]{game, fabric, forge, liteLoader, optiFine};
-        String[] libraryIds = new String[]{"game", "fabric", "forge", "liteloader", "optifine"};
 
-        for (Node node : list.getChildren()) {
+        for (InstallerPageItem library : libraries) {
-            JFXDepthManager.setDepth(node, 1);
+            String libraryId = library.id;
-        }
-
-        for (int i = 0; i < libraryIds.length; ++i) {
-            String libraryId = libraryIds[i];
             if (libraryId.equals("game")) continue;
-            buttons[i].setOnMouseClicked(e ->
+            library.action.set(e ->
                     controller.onNext(new VersionsPage(controller, i18n("install.installer.choose", i18n("install.installer." + libraryId)), gameVersion, downloadProvider, libraryId, () -> controller.onPrev(false))));
+            library.removeAction.set(e -> {
+                controller.getSettings().remove(libraryId);
+                reload();
+            });
         }
     }
 
@@ -120,18 +98,24 @@ public class InstallersPage extends StackPane implements WizardPage {
         return ((RemoteVersion) controller.getSettings().get(id)).getSelfVersion();
     }
 
+    protected void reload() {
+        InstallerPageItem[] libraries = new InstallerPageItem[]{game, fabric, forge, liteLoader, optiFine};
+
+        for (InstallerPageItem library : libraries) {
+            String libraryId = library.id;
+            if (controller.getSettings().containsKey(libraryId)) {
+                library.label.set(i18n("install.installer.version", i18n("install.installer." + libraryId)) + ": " + getVersion(libraryId));
+                library.removable.set(true);
+            } else {
+                library.label.setValue(i18n("install.installer.not_installed", i18n("install.installer." + libraryId)));
+                library.removable.set(false);
+            }
+        }
+    }
+
     @Override
     public void onNavigate(Map<String, Object> settings) {
-        Label[] labels = new Label[]{lblGame, lblFabric, lblForge, lblLiteLoader, lblOptiFine};
+        reload();
-        String[] libraryIds = new String[]{"game", "fabric", "forge", "liteloader", "optifine"};
-
-        for (int i = 0; i < libraryIds.length; ++i) {
-            String libraryId = libraryIds[i];
-            if (controller.getSettings().containsKey(libraryId))
-                labels[i].setText(i18n("install.installer.version", i18n("install.installer." + libraryId)) + ": " + getVersion(libraryId));
-            else
-                labels[i].setText(i18n("install.installer.not_installed", i18n("install.installer." + libraryId)));
-        }
     }
 
     @Override
@@ -143,4 +127,108 @@ public class InstallersPage extends StackPane implements WizardPage {
         controller.getSettings().put("name", txtName.getText());
         controller.onFinish();
     }
+
+    @Override
+    protected Skin<?> createDefaultSkin() {
+        return new InstallersPageSkin(this);
+    }
+
+    protected static class InstallerPageItem {
+        String id;
+        StringProperty label = new SimpleStringProperty();
+        BooleanProperty removable = new SimpleBooleanProperty();
+        ObjectProperty<EventHandler<? super MouseEvent>> removeAction = new SimpleObjectProperty<>();
+        ObjectProperty<EventHandler<? super MouseEvent>> action = new SimpleObjectProperty<>();
+
+        public InstallerPageItem(String id) {
+            this.id = id;
+        }
+    }
+
+    protected static class InstallersPageSkin extends SkinBase<InstallersPage> {
+
+        protected static class InstallersPageItemSkin extends BorderPane {
+            final ImageView imageView;
+            final Label label;
+
+            InstallersPageItemSkin(String imageUrl, InstallerPageItem item, boolean clickable) {
+                setPadding(new Insets(8));
+                getStyleClass().add("card");
+
+                setLeft(imageView = new ImageView(new Image(imageUrl, 32, 32, true, true)));
+                setCenter(label = new Label());
+                label.textProperty().bind(item.label);
+                BorderPane.setMargin(label, new Insets(0, 0, 0, 8));
+                BorderPane.setAlignment(label, Pos.CENTER_LEFT);
+
+                if (clickable) {
+                    HBox right = new HBox();
+                    right.setAlignment(Pos.CENTER_RIGHT);
+                    setRight(right);
+                    JFXButton closeButton = new JFXButton();
+                    closeButton.setGraphic(SVG.close(Theme.blackFillBinding(), -1, -1));
+                    right.getChildren().add(closeButton);
+                    closeButton.getStyleClass().add("toggle-icon4");
+                    closeButton.visibleProperty().bind(item.removable);
+                    closeButton.onMouseClickedProperty().bind(item.removeAction);
+                    onMouseClickedProperty().bind(item.action);
+                    JFXButton arrowButton = new JFXButton();
+                    arrowButton.setGraphic(SVG.arrowRight(Theme.blackFillBinding(), -1, -1));
+                    arrowButton.onMouseClickedProperty().bind(item.action);
+                    arrowButton.getStyleClass().add("toggle-icon4");
+                    right.getChildren().add(arrowButton);
+                    setCursor(Cursor.HAND);
+                }
+            }
+        }
+
+        /**
+         * Constructor for all SkinBase instances.
+         *
+         * @param control The control for which this Skin should attach to.
+         */
+        protected InstallersPageSkin(InstallersPage control) {
+            super(control);
+
+            BorderPane root = new BorderPane();
+            root.setPadding(new Insets(16));
+
+            VBox list = new VBox(8);
+            root.setCenter(list);
+            {
+                HBox versionNamePane = new HBox(8);
+                versionNamePane.setAlignment(Pos.CENTER_LEFT);
+                versionNamePane.getStyleClass().add("card");
+                versionNamePane.setPadding(new Insets(20, 8, 20, 16));
+
+                versionNamePane.getChildren().add(new Label(i18n("archive.name")));
+
+                control.txtName.setMaxWidth(300);
+                versionNamePane.getChildren().add(control.txtName);
+                list.getChildren().add(versionNamePane);
+            }
+
+            InstallersPageItemSkin game = new InstallersPageItemSkin("/assets/img/grass.png", control.game, false);
+            InstallersPageItemSkin fabric = new InstallersPageItemSkin("/assets/img/fabric.png", control.fabric, true);
+            InstallersPageItemSkin forge = new InstallersPageItemSkin("/assets/img/forge.png", control.forge, true);
+            InstallersPageItemSkin liteLoader = new InstallersPageItemSkin("/assets/img/chicken.png", control.liteLoader, true);
+            InstallersPageItemSkin optiFine = new InstallersPageItemSkin("/assets/img/command.png", control.optiFine, true);
+            list.getChildren().addAll(game, fabric, forge, liteLoader, optiFine);
+            list.getChildren().forEach(node -> JFXDepthManager.setDepth(node, 1));
+
+            {
+                JFXButton installButton = new JFXButton(i18n("button.install"));
+                installButton.disableProperty().bind(control.installable.not());
+                installButton.getStyleClass().add("jfx-button-raised");
+                installButton.setButtonType(JFXButton.ButtonType.RAISED);
+                installButton.setPrefWidth(100);
+                installButton.setPrefHeight(40);
+                installButton.setOnMouseClicked(e -> control.onInstall());
+                BorderPane.setAlignment(installButton, Pos.CENTER_RIGHT);
+                root.setBottom(installButton);
+            }
+
+            getChildren().setAll(root);
+        }
+    }
 }

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/UpdateInstallerWizardProvider.java

@@ -84,6 +84,8 @@ public final class UpdateInstallerWizardProvider implements WizardProvider {
                 if ("game".equals(remoteVersion.getLibraryId())) {
                     stages.add("hmcl.install.assets");
                 }
+            } else if (value instanceof RemoveVersionAction) {
+                ret = ret.thenComposeAsync(version -> dependencyManager.removeLibraryAsync(version, ((RemoveVersionAction) value).libraryId));
             }
         }
 
@@ -102,7 +104,7 @@ public final class UpdateInstallerWizardProvider implements WizardProvider {
                         String newGameVersion = ((RemoteVersion) settings.get(libraryId)).getSelfVersion();
                         controller.onNext(new AdditionalInstallersPage(newGameVersion, version, controller, profile.getRepository(), provider));
                     } else {
-                        Controllers.confirmDialog(i18n("install.change_version.confirm", i18n("install.installer." + libraryId), oldLibraryVersion, ((RemoteVersion) settings.get(libraryId)).getSelfVersion()),
+                        Controllers.confirm(i18n("install.change_version.confirm", i18n("install.installer." + libraryId), oldLibraryVersion, ((RemoteVersion) settings.get(libraryId)).getSelfVersion()),
                                 i18n("install.change_version"), controller::onFinish, controller::onCancel);
                     }
                 });
@@ -167,4 +169,12 @@ public final class UpdateInstallerWizardProvider implements WizardProvider {
             Controllers.dialog(StringUtils.getStackTrace(exception), i18n("install.failed"), MessageDialogPane.MessageType.ERROR, next);
         }
     }
+
+    public static class RemoveVersionAction {
+        private final String libraryId;
+
+        public RemoveVersionAction(String libraryId) {
+            this.libraryId = libraryId;
+        }
+    }
 }

HMCL/src/main/java/org/jackhuang/hmcl/ui/versions/InstallerListPage.java

@@ -122,6 +122,7 @@ public class InstallerListPage extends ListPageBase<InstallerItem> {
 
     private void doInstallOffline(File file) {
         Task<?> task = profile.getDependency().installLibraryAsync(version, file.toPath())
+                .thenComposeAsync(profile.getRepository()::save)
                 .thenComposeAsync(profile.getRepository().refreshVersionsAsync());
         task.setName(i18n("install.installer.install_offline"));
         TaskExecutor executor = task.executor(new TaskListener() {

HMCL/src/main/resources/assets/fxml/download/installers.fxml

@@ -1,93 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<?import com.jfoenix.controls.*?>
-<?import javafx.scene.control.Label?>
-<?import javafx.scene.layout.*?>
-<?import javafx.scene.image.ImageView?>
-<?import javafx.scene.image.Image?>
-<?import javafx.geometry.Insets?>
-<fx:root xmlns="http://javafx.com/javafx"
-         xmlns:fx="http://javafx.com/fxml"
-         type="StackPane" style="-fx-padding: 16;">
-    <fx:define>
-        <Insets fx:id="insets" left="8" />
-    </fx:define>
-    <BorderPane>
-        <center>
-            <VBox fx:id="list" spacing="8">
-                <HBox spacing="8" alignment="CENTER_LEFT" styleClass="card" style="-fx-padding: 20 8 20 16">
-                    <Label text="%archive.name" />
-                    <JFXTextField fx:id="txtName" maxWidth="300"/>
-                </HBox>
-                <BorderPane fx:id="btnGame" styleClass="card" style="-fx-padding: 8">
-                    <left>
-                        <ImageView>
-                            <Image url="/assets/img/grass.png" requestedHeight="32" requestedWidth="32" smooth="true" />
-                        </ImageView>
-                    </left>
-                    <center>
-                        <Label fx:id="lblGame" BorderPane.margin="$insets" BorderPane.alignment="CENTER_LEFT" />
-                    </center>
-                </BorderPane>
-                <BorderPane fx:id="btnFabric" styleClass="card" style="-fx-padding: 8; -fx-cursor: HAND">
-                    <left>
-                        <ImageView>
-                            <Image url="/assets/img/fabric.png" requestedHeight="32" requestedWidth="32" smooth="true" />
-                        </ImageView>
-                    </left>
-                    <center>
-                        <Label fx:id="lblFabric" BorderPane.margin="$insets" BorderPane.alignment="CENTER_LEFT" />
-                    </center>
-                    <right>
-                        <fx:include BorderPane.alignment="CENTER_RIGHT" source="/assets/svg/arrow-right.fxml"/>
-                    </right>
-                </BorderPane>
-                <BorderPane fx:id="btnForge" styleClass="card" style="-fx-padding: 8; -fx-cursor: HAND">
-                    <left>
-                        <ImageView>
-                            <Image url="/assets/img/forge.png" requestedHeight="32" requestedWidth="32" smooth="true" />
-                        </ImageView>
-                    </left>
-                    <center>
-                        <Label fx:id="lblForge" BorderPane.margin="$insets" BorderPane.alignment="CENTER_LEFT" />
-                    </center>
-                    <right>
-                        <fx:include BorderPane.alignment="CENTER_RIGHT" source="/assets/svg/arrow-right.fxml"/>
-                    </right>
-                </BorderPane>
-                <BorderPane fx:id="btnLiteLoader" styleClass="card" style="-fx-padding: 8; -fx-cursor: HAND">
-                    <left>
-                        <ImageView>
-                            <Image url="/assets/img/chicken.png" requestedHeight="32" requestedWidth="32" smooth="true" />
-                        </ImageView>
-                    </left>
-                    <center>
-                        <Label fx:id="lblLiteLoader" BorderPane.margin="$insets" BorderPane.alignment="CENTER_LEFT" />
-                    </center>
-                    <right>
-                        <fx:include BorderPane.alignment="CENTER_RIGHT" source="/assets/svg/arrow-right.fxml"/>
-                    </right>
-                </BorderPane>
-                <BorderPane fx:id="btnOptiFine" styleClass="card" style="-fx-padding: 8; -fx-cursor: HAND">
-                    <left>
-                        <ImageView>
-                            <Image url="/assets/img/command.png" requestedHeight="32" requestedWidth="32" smooth="true" />
-                        </ImageView>
-                    </left>
-                    <center>
-                        <Label fx:id="lblOptiFine" BorderPane.margin="$insets" BorderPane.alignment="CENTER_LEFT" />
-                    </center>
-                    <right>
-                        <fx:include BorderPane.alignment="CENTER_RIGHT" source="/assets/svg/arrow-right.fxml"/>
-                    </right>
-                </BorderPane>
-            </VBox>
-        </center>
-        <bottom>
-            <HBox alignment="CENTER_RIGHT">
-                <JFXButton fx:id="btnInstall" onMouseClicked="#onInstall" prefWidth="100" prefHeight="40"
-                           buttonType="RAISED" text="%button.install" styleClass="jfx-button-raised"/>
-            </HBox>
-        </bottom>
-    </BorderPane>
-</fx:root>

HMCL/src/main/resources/assets/fxml/version/installer-item.fxml

@@ -1,22 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<?import com.jfoenix.controls.JFXButton?>
-<?import javafx.scene.control.Label?>
-<?import javafx.scene.layout.*?>
-<fx:root xmlns="http://javafx.com/javafx"
-         xmlns:fx="http://javafx.com/fxml"
-         type="BorderPane">
-        <center>
-            <VBox BorderPane.alignment="CENTER">
-                <Label fx:id="lblInstallerArtifact" style="-fx-font-size: 15;" />
-                <Label fx:id="lblInstallerVersion" style="-fx-font-size: 10;" />
-            </VBox>
-        </center>
-        <right>
-            <JFXButton onMouseClicked="#onDelete" styleClass="toggle-icon4" BorderPane.alignment="CENTER">
-                <graphic>
-                    <fx:include source="/assets/svg/close-black.fxml"/>
-                </graphic>
-            </JFXButton>
-        </right>
-</fx:root>

HMCLCore/src/main/java/org/jackhuang/hmcl/download/DefaultDependencyManager.java

@@ -132,8 +132,7 @@ public class DefaultDependencyManager extends AbstractDependencyManager {
 
                     throw new UnsupportedLibraryInstallerException();
                 })
-                .thenApplyAsync(oldVersion::addPatch)
+                .thenApplyAsync(oldVersion::addPatch);
-                .thenComposeAsync(repository::save);
     }
 
     public static class UnsupportedLibraryInstallerException extends Exception {