feat(08-btrbooks): Добавлено задание

README.md

@@ -9,6 +9,7 @@
 - [Рефлексия и логгинг](labs/05-reflect) (`05-reflect`)
 - [Аннотации](labs/06-annotations) (`06-annotations`)
 - [Консольный интерфейс для книг](labs/07-books) (`07-books`)
+- [Консольный интерфейс для книг 2](labs/08-btrbooks) (`08-btrbooks`)
 
 ## Лицензия
 

labs/08-btrbooks/.gitattributes

@@ -0,0 +1,12 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
+# Binary files should be left untouched
+*.jar           binary
+

labs/08-btrbooks/.gitignore

@@ -0,0 +1,5 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

labs/08-btrbooks/README.md

@@ -0,0 +1,17 @@
+# Консольный интерфейс для книг 2 (`08-btrbooks`)
+
+## Формулировка задания
+
+Дополнить `07-books`:
+- Функцией редактирования книг
+- Чтением JSON
+- Записью книг в JSON/CSV
+
+> NB: Парсинг и запись в форматы писать ручками.
+
+## Запуск через Gradle
+
+```sh
+gradle run --console=plain --args="/tmp/books.json"
+```
+

labs/08-btrbooks/app/build.gradle.kts

@@ -0,0 +1,48 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/8.10.2/userguide/building_java_projects.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the application plugin to add support for building a CLI application in Java.
+    application
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    // Use JUnit Jupiter for testing.
+    testImplementation(libs.junit.jupiter)
+
+    testRuntimeOnly("org.junit.platform:junit-platform-launcher")
+
+    // This dependency is used by the application.
+    implementation(libs.guava)
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(23)
+    }
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = "ru.mrqiz.btrbooks.App"
+}
+
+tasks.named<Test>("test") {
+    // Use JUnit Platform for unit tests.
+    useJUnitPlatform()
+}
+
+tasks.named<JavaExec>("run") {
+   standardInput = System.`in`
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/App.java

@@ -0,0 +1,25 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.Map;
+
+public class App {
+    public static void main(String[] args) {
+        if (args.length < 1) {
+            System.out.println("hmm noo filename go touch grass");
+            return;
+        }
+        String filename = args[0];
+
+        BooksParser parser = new BooksParser();
+        Books books = parser.read(filename);
+
+        if (books == null || books.getBookList().isEmpty()) {
+            System.out.println("hmm nothing in the books.. go read some");
+            return;
+        }
+
+        CLI cli = new CLI(books);
+        cli.start();
+
+    }
+}

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/Book.java

@@ -0,0 +1,65 @@
+package ru.mrqiz.btrbooks;
+
+public class Book {
+    private String author;
+    private String name;
+    private int year;
+    private int id;
+    private int price;
+
+    public Book() {}
+
+    public Book(String author, String name, int year, int id) {
+        this.author = author;
+        this.name = name;
+        this.year = year;
+        this.id = id;
+        this.price = price;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getYear() {
+        return year;
+    }
+
+    public void setYear(int year) {
+        this.year = year;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+
+    public void setPrice(int price) {
+        this.price = price;
+    }
+
+    @Override
+    public String toString() {
+        return "ID: " + id + ", Author: " + author + ", Name: " + name + ", Year: " + year;
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/Books.java

@@ -0,0 +1,69 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Books {
+    private List<Book> bookList;
+
+    public Books() {
+        this.bookList = new ArrayList<>();
+    }
+
+    public List<Book> getBookList() {
+        return bookList;
+    }
+
+    public void setBookList(List<Book> bookList) {
+        this.bookList = bookList;
+    }
+
+    @Override
+    public String toString() {
+        return "Books{" +
+                "bookList=" + bookList +
+                '}';
+    }
+
+    public String toJson() {
+        StringBuilder jsonBuilder = new StringBuilder();
+        jsonBuilder.append("[");
+
+        for (int i = 0; i < bookList.size(); i++) {
+            Book book = bookList.get(i);
+            jsonBuilder.append("{");
+            jsonBuilder.append("\"id\": ").append(book.getId()).append(", ");
+            jsonBuilder.append("\"author\": \"").append(book.getAuthor()).append("\", ");
+            jsonBuilder.append("\"name\": \"").append(book.getName()).append("\", ");
+            jsonBuilder.append("\"year\": ").append(book.getYear()).append(", ");
+            jsonBuilder.append("\"price\": ").append(book.getPrice());
+            jsonBuilder.append("}");
+
+            if (i < bookList.size() - 1) {
+                jsonBuilder.append(", ");
+            }
+        }
+
+        jsonBuilder.append("]");
+        jsonBuilder.append("");
+
+        return jsonBuilder.toString();
+    }
+
+    public String toCsv() {
+        StringBuilder csvBuilder = new StringBuilder();
+        csvBuilder.append("ID,Author,Name,Year,Price\n");
+
+        for (Book book : bookList) {
+            csvBuilder.append(book.getId()).append(",")
+                      .append(book.getAuthor()).append(",")
+                      .append(book.getName()).append(",")
+                      .append(book.getYear()).append(",")
+                      .append(book.getPrice()).append("\n");
+        }
+
+        return csvBuilder.toString();
+    }
+
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/BooksParser.java

@@ -0,0 +1,73 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.io.*;
+
+public class BooksParser {
+
+    public Books read(String filename) {
+      StringBuilder content = new StringBuilder();
+
+        try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                content.append(line).append(System.lineSeparator());
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        String fileContent = content.toString();
+        return parseBooks(fileContent);
+    }
+
+    private Books parseBooks(String json) {
+        Books books = new Books();
+        String[] bookEntries = json.split("\\},\\{");
+        
+        for (String entry : bookEntries) {
+          entry = entry.replaceAll("\\{\\}|\\$\\$\\$|\"", "").trim();
+            String[] fields = entry.split(",");
+
+            String author = null;
+            String name = null;
+            int year = 0;
+            int id = 0;
+            int price = 0;
+
+            for (String field : fields) {
+                String[] keyValue = field.replaceAll("\\[\\{", "").replaceAll("\\}\\]", "").split(":");
+                if (keyValue.length == 2) {
+                    String key = keyValue[0].trim();
+                    String value = keyValue[1].trim();
+
+                    switch (key) {
+                        case "author":
+                            author = value;
+                            break;
+                        case "name":
+                            name = value;
+                            break;
+                        case "year":
+                            year = Integer.parseInt(value.replaceAll("\\D+", ""));
+                            break;
+                        case "id":
+                            id = Integer.parseInt(value.replaceAll("\\D+", ""));
+                            break;
+                        case "price":
+                            price = Integer.parseInt(value.replaceAll("\\D+", ""));
+                            break;
+                    }
+                }
+            }
+
+            Book book = new Book(author, name, year, id);
+            book.setPrice(price);
+            books.getBookList().add(book);
+        }
+
+        return books;
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/BooksSaver.java

@@ -0,0 +1,31 @@
+package ru.mrqiz.btrbooks;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.io.IOException;
+
+public class BooksSaver {
+    public static void saveToFile(String filename, Books books, String fmt) {
+        String content = convert(books, fmt);
+        Path path = Paths.get(filename);
+        try {
+            Files.write(path, content.getBytes());
+            System.out.println("ok.");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static String convert(Books books, String fmt) {
+        switch (fmt.toLowerCase()) {
+            case "json":
+                return books.toJson();
+            case "csv":
+                return books.toCsv();
+            default:
+                throw new IllegalArgumentException("idk.." + fmt);
+        }
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/CLI.java

@@ -0,0 +1,49 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+public class CLI {
+    private final Books books;
+    private final Scanner scanner;
+    private final Map<String, CLICommand> commands;
+
+    public CLI(Books books) {
+        this.books = books;
+        this.scanner = new Scanner(System.in);
+        this.commands = new HashMap<>();
+        initializeCommands();
+    }
+
+    private void initializeCommands() {
+        commands.put("ls", new DisplayAllBooks());
+        commands.put("rm", new DeleteBook(scanner));
+        commands.put("save", new SaveBooks(scanner));
+        commands.put("edit", new EditBook(scanner));
+        commands.put("ggwp", null);
+    }
+
+    public void start() {
+        while (true) {
+            System.out.println("\npick one:");
+            commands.keySet().forEach(key -> System.out.println(key));
+
+            System.out.print("> ");
+            String choice = scanner.nextLine().trim().toLowerCase();
+
+            if (choice == "ggwp") {
+                System.out.println("kthxbye..");
+                return;
+            }
+
+            CLICommand command = commands.get(choice);
+            if (command != null) {
+                command.execute(books);
+            } else {
+                System.out.println("what the command..");
+            }
+        }
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/CLICommand.java

@@ -0,0 +1,6 @@
+package ru.mrqiz.btrbooks;
+
+public interface CLICommand {
+    void execute(Books books);
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/DeleteBook.java

@@ -0,0 +1,32 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.List;
+import java.util.Scanner;
+
+public class DeleteBook implements CLICommand {
+    private final Scanner scanner;
+
+    public DeleteBook(Scanner scanner) {
+        this.scanner = scanner;
+    }
+
+    @Override
+    public void execute(Books books) {
+        System.out.println("gimme id:");
+        String input = scanner.nextLine();
+        
+        List<Book> bookList = books.getBookList();
+        Book bookToDelete = bookList.stream()
+                .filter(book -> String.valueOf(book.getId()).equals(input))
+                .findFirst()
+                .orElse(null);
+
+        if (bookToDelete != null) {
+            bookList.remove(bookToDelete);
+            System.out.println("cancelled " + input + " in xwitter");
+        } else {
+            System.out.println("no book found - id=" + input);
+        }
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/DisplayAllBooks.java

@@ -0,0 +1,11 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.stream.Stream;
+
+public class DisplayAllBooks implements CLICommand {
+    @Override
+    public void execute(Books books) {
+        books.getBookList().stream().forEach(System.out::println);
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/EditBook.java

@@ -0,0 +1,76 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.List;
+import java.util.Scanner;
+
+public class EditBook implements CLICommand {
+    private final Scanner scanner;
+
+    public EditBook(Scanner scanner) {
+        this.scanner = scanner;
+    }
+
+    @Override
+    public void execute(Books books) {
+        System.out.println("id?");
+        String input = scanner.nextLine();
+        
+        List<Book> bookList = books.getBookList();
+        Book bookToEdit = bookList.stream()
+                .filter(book -> String.valueOf(book.getId()).equals(input))
+                .findFirst()
+                .orElse(null);
+
+        if (bookToEdit != null) {
+            System.out.println("k got the " + bookToEdit);
+            System.out.println("author? (leave blank to keep current):");
+            String newAuthor = scanner.nextLine();
+            if (!newAuthor.isEmpty()) {
+                bookToEdit.setAuthor(newAuthor);
+            }
+
+            System.out.println("name? (leave blank to keep current):");
+            String newName = scanner.nextLine();
+            if (!newName.isEmpty()) {
+                bookToEdit.setName(newName);
+            }
+
+            int newYear = bookToEdit.getYear(); 
+            System.out.println("year? (leave blank to keep current):");
+            String yearInput = scanner.nextLine();
+            if (!yearInput.isEmpty()) {
+                while (!isValidYear(yearInput)) {
+                    System.out.println("thats not a year.. gimme year:");
+                    yearInput = scanner.nextLine();
+                }
+                newYear = Integer.parseInt(yearInput);
+            }
+            bookToEdit.setYear(newYear);
+
+            int newPrice = bookToEdit.getPrice();
+            System.out.println("price? (leave blank to keep current):");
+            String priceInput = scanner.nextLine();
+            if (!priceInput.isEmpty()) {
+                while (!isValidPrice(priceInput)) {
+                    System.out.println("thats not a price.. gimme price:");
+                    priceInput = scanner.nextLine();
+                }
+                newPrice = Integer.parseInt(priceInput);
+            }
+            bookToEdit.setPrice(newPrice);
+
+            System.out.println("k saved!");
+        } else {
+            System.out.println("umm got no book id=" + input);
+        }
+    }
+
+    private boolean isValidYear(String input) {
+        return input.matches("^(19|20)\\d{2}$");
+    }
+
+    private boolean isValidPrice(String input) {
+        return input.matches("^\\d+(\\.\\d{1,2})?$");
+    }
+}
+

labs/08-btrbooks/app/src/main/java/ru/mrqiz/btrbooks/SaveBooks.java

@@ -0,0 +1,30 @@
+package ru.mrqiz.btrbooks;
+
+import java.util.List;
+import java.util.Scanner;
+
+public class SaveBooks implements CLICommand {
+    private final Scanner scanner;
+
+    public SaveBooks(Scanner scanner) {
+        this.scanner = scanner;
+    }
+
+    @Override
+    public void execute(Books books) {
+        System.out.println("gimme format:");
+        String fmt = scanner.nextLine();
+        System.out.println("gimme path:");
+        String path = scanner.nextLine();
+        
+        List<Book> bookList = books.getBookList();
+
+        try {
+          (new BooksSaver()).saveToFile(path, books, fmt);
+        } catch (Exception e) {
+          e.printStackTrace();
+        }
+
+    }
+}
+

labs/08-btrbooks/gradle/libs.versions.toml

@@ -0,0 +1,10 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
+
+[versions]
+guava = "33.2.1-jre"
+junit-jupiter = "5.10.3"
+
+[libraries]
+guava = { module = "com.google.guava:guava", version.ref = "guava" }
+junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-jupiter" }

labs/08-btrbooks/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

labs/08-btrbooks/gradlew

@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

labs/08-btrbooks/gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

labs/08-btrbooks/settings.gradle.kts

@@ -0,0 +1,14 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/8.10.2/userguide/multi_project_builds.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.8.0"
+}
+
+rootProject.name = "btrbooks"
+include("app")