Add Java support

glokta1 · glokta1 · commit ddb569d7a9dc · 2024-06-04T16:34:54.000+05:30
diff --git a/compiled_starters/java/.gitattributes b/compiled_starters/java/.gitattributes
@@ -0,0 +1 @@
+* text=auto
diff --git a/compiled_starters/java/.gitignore b/compiled_starters/java/.gitignore
@@ -0,0 +1,4 @@
+java_shell.jar
+target/*
+target/
+.idea/
diff --git a/compiled_starters/java/README.md b/compiled_starters/java/README.md
@@ -0,0 +1,33 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/shell.png)
+
+This is a starting point for Java solutions to the
+["Build Your Own Shell" Challenge](https://app.codecrafters.io/courses/shell/overview).
+
+_Add a description of your course here_
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your `shell` implementation is in `src/main/java/Main.java`.
+Study and uncomment the relevant code, and push your changes to pass the first
+stage:
+
+```sh
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
+
+Time to move on to the next stage!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `java (21)` installed locally
+1. Run `./your_shell.sh` to run your program, which is implemented in
+   `src/main/java/Main.java`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.
diff --git a/compiled_starters/java/codecrafters.yml b/compiled_starters/java/codecrafters.yml
@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the Java version used to run your code
+# on Codecrafters.
+#
+# Available versions: java-21
+language_pack: java-21
diff --git a/compiled_starters/java/pom.xml b/compiled_starters/java/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>io.codecrafters</groupId>
+    <artifactId>build-your-own-shell</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>21</java.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <finalName>java_shell</finalName> <!-- Please do not change this final artifact name-->
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                    <appendAssemblyId>false</appendAssemblyId>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <!-- This is the main class of your program which will be executed-->
+                            <mainClass>Main</mainClass>
+                        </manifest>
+                    </archive>
+                    <outputDirectory>${dir}</outputDirectory>
+                </configuration>
+
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/compiled_starters/java/src/main/java/Main.java b/compiled_starters/java/src/main/java/Main.java
@@ -0,0 +1,17 @@
+// Uncomment this block to pass the first stage
+// import java.util.Scanner;
+
+public class Main {
+
+    public static void main(String[] args) throws Exception {
+        // Uncomment this block to pass the first stage
+        // Scanner sc = new Scanner(System.in);
+
+        // You can use print statements as follows for debugging, they'll be visible when running tests.
+        System.out.println("Logs from your program will appear here!");
+
+        System.out.print("$ ");
+        // Uncomment this block to pass the first stage
+        // String input = sc.nextLine();
+    }
+}
diff --git a/compiled_starters/java/your_shell.sh b/compiled_starters/java/your_shell.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+#
+# DON'T EDIT THIS!
+#
+# CodeCrafters uses this file to test your code. Don't make any changes here!
+#
+# DON'T EDIT THIS!
+set -e
+mvn -B --quiet package -Ddir=/tmp/codecrafters-shell-target
+exec java -jar /tmp/codecrafters-shell-target/java_shell.jar "$@"
diff --git a/course-definition.yml b/course-definition.yml
@@ -19,6 +19,7 @@ languages:
   - slug: "go"
   - slug: "python"
   - slug: "rust"
+  - slug: "java"
 
 marketing:
   difficulty: medium
diff --git a/dockerfiles/java-21.Dockerfile b/dockerfiles/java-21.Dockerfile
@@ -0,0 +1,16 @@
+FROM maven:3.9.5-eclipse-temurin-21-alpine
+
+COPY pom.xml /app/pom.xml
+
+WORKDIR /app
+
+# Download the dependencies
+RUN mvn -B package -Ddir=/tmp/codecrafters-shell-target
+
+# Cache Dependencies
+RUN mkdir -p /app-cached
+RUN mv /app/target /app-cached # Is this needed?
+
+# Pre-compile steps
+RUN printf "cd \${CODECRAFTERS_SUBMISSION_DIR} && mvn -B package -Ddir=/tmp/codecrafters-shell-target && sed -i 's/^\(mvn .*\)/#\1/' ./your_shell.sh" > /codecrafters-precompile.sh
+RUN chmod +x /codecrafters-precompile.sh
diff --git a/solutions/java/01-oo8/code/.gitattributes b/solutions/java/01-oo8/code/.gitattributes
@@ -0,0 +1 @@
+* text=auto
diff --git a/solutions/java/01-oo8/code/.gitignore b/solutions/java/01-oo8/code/.gitignore
@@ -0,0 +1,4 @@
+java_shell.jar
+target/*
+target/
+.idea/
diff --git a/solutions/java/01-oo8/code/README.md b/solutions/java/01-oo8/code/README.md
@@ -0,0 +1,33 @@
+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/shell.png)
+
+This is a starting point for Java solutions to the
+["Build Your Own Shell" Challenge](https://app.codecrafters.io/courses/shell/overview).
+
+_Add a description of your course here_
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your `shell` implementation is in `src/main/java/Main.java`.
+Study and uncomment the relevant code, and push your changes to pass the first
+stage:
+
+```sh
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
+
+Time to move on to the next stage!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `java (21)` installed locally
+1. Run `./your_shell.sh` to run your program, which is implemented in
+   `src/main/java/Main.java`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.
diff --git a/solutions/java/01-oo8/code/codecrafters.yml b/solutions/java/01-oo8/code/codecrafters.yml
@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the Java version used to run your code
+# on Codecrafters.
+#
+# Available versions: java-21
+language_pack: java-21
diff --git a/solutions/java/01-oo8/code/pom.xml b/solutions/java/01-oo8/code/pom.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>io.codecrafters</groupId>
+    <artifactId>build-your-own-shell</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>21</java.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <finalName>java_shell</finalName> <!-- Please do not change this final artifact name-->
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                    <appendAssemblyId>false</appendAssemblyId>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <!-- This is the main class of your program which will be executed-->
+                            <mainClass>Main</mainClass>
+                        </manifest>
+                    </archive>
+                    <outputDirectory>${dir}</outputDirectory>
+                </configuration>
+
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/solutions/java/01-oo8/code/src/main/java/Main.java b/solutions/java/01-oo8/code/src/main/java/Main.java
@@ -0,0 +1,11 @@
+import java.util.Scanner;
+
+public class Main {
+
+    public static void main(String[] args) throws Exception {
+        Scanner sc = new Scanner(System.in);
+
+        System.out.print("$ ");
+        String input = sc.nextLine();
+    }
+}
diff --git a/solutions/java/01-oo8/code/your_shell.sh b/solutions/java/01-oo8/code/your_shell.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+#
+# DON'T EDIT THIS!
+#
+# CodeCrafters uses this file to test your code. Don't make any changes here!
+#
+# DON'T EDIT THIS!
+set -e
+mvn -B --quiet package -Ddir=/tmp/codecrafters-shell-target
+exec java -jar /tmp/codecrafters-shell-target/java_shell.jar "$@"
diff --git a/solutions/java/01-oo8/diff/src/main/java/Main.java.diff b/solutions/java/01-oo8/diff/src/main/java/Main.java.diff
@@ -0,0 +1,22 @@
+@@ -1,17 +1,11 @@
+-// Uncomment this block to pass the first stage
+-// import java.util.Scanner;
++import java.util.Scanner;
+
+ public class Main {
+
+     public static void main(String[] args) throws Exception {
+-        // Uncomment this block to pass the first stage
+-        // Scanner sc = new Scanner(System.in);
++        Scanner sc = new Scanner(System.in);
+
+-        // You can use print statements as follows for debugging, they'll be visible when running tests.
+-        System.out.println("Logs from your program will appear here!");
+-
+         System.out.print("$ ");
+-        // Uncomment this block to pass the first stage
+-        // String input = sc.nextLine();
++        String input = sc.nextLine();
+     }
+ }
+\ No newline at end of file
diff --git a/solutions/java/01-oo8/explanation.md b/solutions/java/01-oo8/explanation.md
@@ -0,0 +1,26 @@
+The entry point for your Shell implementation is in `src/main/java/Main.java`.
+
+Study and uncomment the relevant code: 
+
+```java
+// Uncomment this block to pass the first stage
+import java.util.Scanner;
+```
+
+```java
+// Uncomment this block to pass the first stage
+Scanner sc = new Scanner(System.in);
+```
+
+```java
+// Uncomment this block to pass the first stage
+String input = sc.nextLine();
+```
+
+Push your changes to pass the first stage:
+
+```
+git add .
+git commit -m "pass 1st stage" # any msg
+git push origin master
+```
diff --git a/starter-repository-definitions.yml b/starter-repository-definitions.yml
@@ -61,3 +61,23 @@
   template_attributes:
     required_executable: "go (1.19)"
     user_editable_file: "cmd/myshell/main.go"
+
+- language: java
+  file_mappings:
+    - source: starter_templates/README.md
+      target: README.md
+    - source: starter_templates/codecrafters.yml
+      target: codecrafters.yml
+    - source: starter_templates/java/your_shell.sh
+      target: your_shell.sh
+    - source: starter_templates/java/.gitignore
+      target: .gitignore
+    - source: starter_templates/java/src/main/java/Main.java
+      target: src/main/java/Main.java
+    - source: starter_templates/java/pom.xml
+      target: pom.xml
+    - source: starter_templates/.gitattributes
+      target: .gitattributes
+  template_attributes:
+    required_executable: "java (21)"
+    user_editable_file: "src/main/java/Main.java"
diff --git a/starter_templates/codecrafters.yml b/starter_templates/codecrafters.yml
@@ -18,4 +18,8 @@ language_pack: go-1.22
 {{# language_is_rust }}
 # Available versions: rust-1.77
 language_pack: rust-1.77
-{{/ language_is_rust }}
+{{/ language_is_rust }}
+{{# language_is_java }}
+# Available versions: java-21
+language_pack: java-21
+{{/ language_is_java }}
diff --git a/starter_templates/java/.gitignore b/starter_templates/java/.gitignore
@@ -0,0 +1,4 @@
+java_shell.jar
+target/*
+target/
+.idea/
diff --git a/starter_templates/java/pom.xml b/starter_templates/java/pom.xml
diff --git a/starter_templates/java/src/main/java/Main.java b/starter_templates/java/src/main/java/Main.java
diff --git a/starter_templates/java/your_shell.sh b/starter_templates/java/your_shell.sh

-Original file line number
+Diff line change
@@ @@ -0,0 +1,4 @@ @@
 +java_shell.jar
 +target/*
 +target/
 +.idea/