feat: add Mill build system and Google Java Format

.editorconfig

@@ -0,0 +1,35 @@
+# EditorConfig helps maintain consistent coding styles
+# between different editors and IDEs
+# See https://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.java]
+indent_style = space
+indent_size = 2
+max_line_length = 100
+
+[*.{json,yaml,yml}]
+indent_style = space
+indent_size = 2
+
+[*.{md,markdown}]
+trim_trailing_whitespace = false
+
+[*.{xml,html}]
+indent_style = space
+indent_size = 2
+
+[*.gradle]
+indent_style = space
+indent_size = 4
+
+[*.mill]
+indent_style = space
+indent_size = 2

.githooks/pre-commit

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# Pre-commit hook to format Java code with Google Java Format
+
+echo "Running Google Java Format on staged Java files..."
+
+# Get list of staged Java files
+STAGED_JAVA_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep '\.java$')
+
+if [ -z "$STAGED_JAVA_FILES" ]; then
+    echo "No Java files to format."
+    exit 0
+fi
+
+# Format the files
+mill formatJava
+
+# Add the formatted files back to staging
+for file in $STAGED_JAVA_FILES; do
+    if [ -f "$file" ]; then
+        git add "$file"
+        echo "Formatted and re-staged: $file"
+    fi
+done
+
+echo "Java formatting complete!"
+exit 0

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: Code Quality
+
+on:
+    push:
+        branches: [main, develop]
+    pull_request:
+        branches: [main]
+
+jobs:
+    format-check:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v4
+
+            - name: Set up JDK 17
+              uses: actions/setup-java@v4
+              with:
+                  java-version: "17"
+                  distribution: "temurin"
+
+            - uses: zhutmost/setup-mill@main
+              with:
+                  mill-version: 0.12.11
+
+            - name: Check Java formatting
+              run: mill checkJavaFormat
+              # the server process is kept alive across steps,
+              # so separate invocations of mill remain extremely fast!
+
+            - name: Compile
+              run: mill compile

.gitignore

@@ -188,3 +188,6 @@ compile_commands.json
 
 # bun
 node_modules/
+
+# crush
+.crush

.mill-version

@@ -0,0 +1 @@
+0.12.11

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+  "recommendations": [
+    "redhat.java",
+    "vscjava.vscode-java-pack",
+    "esbenp.prettier-vscode",
+    "editorconfig.editorconfig",
+    "ms-vscode.vscode-json"
+  ]
+}

.vscode/settings.json

@@ -1,6 +1,11 @@
 {
 	"java.configuration.updateBuildConfiguration": "automatic",
 	"java.server.launchMode": "Standard",
+	"java.format.settings.url": "https://raw.githubusercontent.com/google/styleguide/gh-pages/eclipse-java-google-style.xml",
+	"java.format.settings.profile": "GoogleStyle",
+	"java.format.enabled": true,
+	"java.saveActions.organizeImports": true,
+	"java.compile.nullAnalysis.mode": "automatic",
 	"files.exclude": {
 		"**/.git": true,
 		"**/.svn": true,
@@ -26,8 +31,27 @@
 		}
 	],
 	"java.test.defaultConfig": "WPIlibUnitTests",
+	"editor.formatOnSave": true,
+	"editor.formatOnPaste": true,
+	"editor.codeActionsOnSave": {
+		"source.organizeImports": "explicit"
+	},
+	"files.trimTrailingWhitespace": true,
+	"files.insertFinalNewline": true,
+	"files.trimFinalNewlines": true,
 	"[java]": {
+		"editor.defaultFormatter": "redhat.java",
+		"editor.tabSize": 2,
+		"editor.insertSpaces": true,
+		"editor.detectIndentation": false
+	},
+	"[json]": {
 		"editor.defaultFormatter": "esbenp.prettier-vscode"
 	},
-	"editor.formatOnSave": true
+	"[yaml]": {
+		"editor.defaultFormatter": "esbenp.prettier-vscode"
+	},
+	"[markdown]": {
+		"editor.defaultFormatter": "esbenp.prettier-vscode"
+	}
 }

README.md

@@ -100,7 +100,6 @@ public class ExampleSubsystem extends SubsystemBase {
 		return new RunCommand(() -> motor.set(speed.getAsDouble()), this);
 	}
 }
-
 ```
 
 ```java
@@ -113,7 +112,6 @@ public class RobotContainer {
 		joystick.trigger().onTrue(elevatorSubsystem.setPos(() -> 0.3));
 	}
 }
-
 ```
 
 ## Why AGPL 3.0 as a license?