Initial commit

.gitattributes

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+*.java          text diff=java
+*.properties    text
+*.xml           text
+*.ini           text
+*.md            text
+*.txt           text
+*.form          text eol=lf
+
+*.class         binary
+*.jar           binary
+*.png           binary
+*.ico           binary
+*.xcf           binary

.gitignore

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+/target/
+/.idea/
+/nbactions.xml
+/history.ini
+/dependency-reduced-pom.xml

CONTRIBUTING.md

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+# Disclaimer
+
+This is a hobby project. I work on it for fun.
+If I'm not having fun, I probably won't do it :)
+You're welcome to report issues, or create pull requests.
+But if they're not useful to me, I probably won't respond
+(though they may help others who run into them).
+If you really want to see enhancements, fork it and have fun. :)
+
+# Development environment
+
+Any Java IDE of your choice. However the main window form was creating using Netbeans form designer, so you'll want that to edit the GUI.
+
+# Building
+
+It's a standard Maven project. Run
+```
+mvn clean install
+```
+It will generate a self-contained fat jar in the `/target/` directory that is ready to use.
+
+# Reporting issues
+
+Use issue reporting best practices. Provide these 3 things:
+
+1. Steps to reproduce the issue
+2. Expected behavior
+3. Actual behavior
+
+# Pull requests
+
+Check your code against SpotBugs, PMD, or IntelliJ inspections. Fix any issues.
+
+Anything that is merged will be a fast-forward or squash-merge.

README.md

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+# Basic .unitypackage Viewer
+
+I just wanted a simple tool to do the following:
+
+* Browse the tree of a `.unitypackage` file
+* Extract some individual files
+* All without having to start Unity
+
+So I threw this together for my own use. Maybe it could be helpful to others.
+
+This is a Java program requiring Java 8 or higher.
+
+
+# How to use
+
+![](.github/BupV.png?raw=true)
+
+* Run with Java
+* Accepts a `.unitypackage` as a program argument to open immediately
+* Open `.unitypackage` files using the Open button, or drag and drop a `.unitypackage` onto the window
+* Search by name or GUID in the text box and press Enter or the Search button
+* Expand/Collapse the tree
+* Files with a preview will appear in the preview box
+* Extract the selected item into the same directory as the `.unitypackage`.
+  The directory will be opened in your OS file viewer.
+* Right-click to copy name, size, or GUID
+* History.ini saves the last directory used
+
+
+# Disclaimers
+
+* This is *beta* quality software. No rigorous testing has been done. It probably has bugs. Only tested with data as I make use of it.
+
+* All I know about the `.unitypackage` file format came from examining several files, and reading code from some existing tools.
+I didn't read any specification (assuming there is one). There could certainly be edge cases this misses.
+
+# The `.unitypackage` file format
+
+A `.unitypackage` is just a compressed TAR archive.
+Inside it contains several root directories.
+Each directory name is a GUID.
+
+![](.github/tar-directories.png?raw=true)
+
+
+Inside each of them is the contents of the asset with that GUID.
+Specifically, each GUID directory contains some of these 4 files.
+
+![](.github/tar-directory-contents.png?raw=true)
+
+* `pathname` First line of text is the full path of the asset where it will appear when imported into Unity.
+* `asset.meta` The corresponding .meta file.
+* `asset` Contains the actual asset payload. Won't exist for directories.
+* `preview.png` Optional preview of some types of assets.
+
+
+It's not difficult to build up the structure of what's shown when you import into unity.
+
+As shown in Unity:
+
+![](.github/Unity.png?raw=true)
+
+As shown in this tool:
+
+![](.github/BupV.png?raw=true)
+
+# Existing open source tools I found
+
+### https://gist.github.com/yasirkula/dfc43134fbfefb820d0adbc5d7c25fb3
+
+A very nice Unity script to explore `.unitypackages`.
+
+### https://github.com/Switch-9867/UnitypackgeExtractor
+
+C# command-line tool.
+
+### https://github.com/Cobertos/unitypackage_extractor
+
+Python command-line tool. Its associated pypi package at https://pypi.org/project/unitypackage-extractor/
+

pom.xml

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+<?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>m35-projects</groupId>
+    <artifactId>unity-package-viewer</artifactId>
+    <version>0.0.1</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-compress -->
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-compress</artifactId>
+            <version>1.26.2</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <resources>
+            <resource><directory>src/main/resources</directory></resource>
+            <resource><directory>src/main/java</directory></resource>
+            <resource>
+                <directory>src/main/misc</directory>
+                <filtering>true</filtering>
+            </resource>
+            <resource>
+                <directory>.</directory>
+                <includes><include>LICENSE.txt</include></includes>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>UnityPackageViewer-${project.version}</finalName>
+                            <minimizeJar>true</minimizeJar>
+
+                            <!-- Choose my MANIFEST.MF as the winner -->
+                            <filters>
+                                <filter>
+                                    <artifact>${project.groupId}:${project.artifactId}</artifact>
+                                    <includes>
+                                        <include>**/*</include>
+                                    </includes>
+                                </filter>
+                                <filter>
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/MANIFEST.MF</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ApacheLicenseResourceTransformer"/>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ApacheNoticeResourceTransformer"/>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>unitypackage.viewer.Main</mainClass>
+                                </transformer>
+                            </transformers>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/unitypackage/model/UnityAsset.java

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+/*
+ * Basic .unitypackage Viewer
+ * Copyright (C) 2024 Michael Sabin
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package unitypackage.model;
+
+import java.awt.image.BufferedImage;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Date;
+
+/**
+ * An asset as it would appear in the tree of stuff you see when you import a .unitypackage into unity.
+ * This could be a directory or a file.
+ */
+public class UnityAsset {
+
+    private final UnityAssetBuilder source;
+
+    UnityAsset(UnityAssetBuilder source) {
+        this.source = source;
+    }
+
+    public String getFullPath() {
+        return source.getPathname_firstLine();
+    }
+
+    public Path getFullPathAsPath() {
+        return Paths.get(getFullPath());
+    }
+
+    public Path getFileNameAsPath() {
+        return getFullPathAsPath().getFileName();
+    }
+
+    public String getFileName() {
+        return getFileNameAsPath().toString();
+    }
+
+    public long getSize() {
+        return source.getAsset_fileSize();
+    }
+
+    public String getGuid() {
+        return source.getAsset_meta_guid();
+    }
+
+    public String getDirectoryGuid() {
+        return source.getGuidBaseDirectory();
+    }
+
+    public BufferedImage getPreview() {
+        return source.getPreview();
+    }
+
+    public boolean isProbablyDirectory() {
+        return source.getRawPathTo_asset_file() == null;
+    }
+
+    String getTarPathOf_asset_File() {
+        return source.getRawPathTo_asset_file();
+    }
+
+    public Date getDateModified() {
+        return source.getAsset_dateModified();
+    }
+
+    @Override
+    public String toString() {
+        return "UnityAsset{" + getFullPath() + '}';
+    }
+}