Add SwiftFormat configuration and apply formatting (#210)

Author: Kyle-Ye

.swiftformat

@@ -0,0 +1,80 @@
+# OpenAttributeGraph SwiftFormat configuration
+
+# Swift version
+--swiftversion 6.1
+
+# Indentation
+--indent 4
+--tabwidth 4
+--indentcase false
+--ifdef no-indent
+--xcodeindentation enabled
+
+# Wrapping
+--maxwidth 120
+--wraparguments before-first
+--wrapparameters before-first
+--wrapcollections before-first
+--wrapreturntype preserve
+--wrapconditions preserve
+--closingparen balanced
+
+# Braces
+--allman false
+
+# Spaces
+--operatorfunc spaced
+--nospaceoperators
+--ranges spaced
+--typeattributes prev-line
+
+# Semicolons
+--semicolons never
+
+# Trailing commas
+--commas inline
+
+# Imports
+--importgrouping testable-last
+
+# Void
+--voidtype void
+
+# Self
+--self remove
+--selfrequired
+
+# Redundancy
+--redundanttype inferred
+
+# Misc
+--trimwhitespace always
+--stripunusedargs closure-only
+--emptybraces no-space
+--elseposition same-line
+--guardelse next-line
+
+# File header (preserve existing headers)
+--header ignore
+
+# Disabled rules - too opinionated or conflict with project conventions
+--disable extensionAccessControl
+--disable docComments
+--disable wrapPropertyBodies
+--disable wrapFunctionBodies
+--disable wrapSingleLineComments
+--disable redundantThrows
+--disable headerFileName
+--disable numberFormatting
+--disable swiftTestingTestCaseNames
+--disable noForceUnwrapInTests
+--disable redundantAsync
+--disable modifierOrder
+--disable todos
+--disable opaqueGenericParameters
+--disable wrapMultilineStatementBraces
+--disable trailingCommas
+--disable redundantReturn
+
+# Exclusions - skip vendored/generated code
+--exclude Sources/SwiftCorelibs,Sources/SwiftHeaders,.build,Package.swift

CLAUDE.md

@@ -7,6 +7,7 @@ OpenAttributeGraph is a Swift package that provides attribute graph functionalit
 
 ### 1. Make Changes and Commit
 - Implement your feature or fix
+- Format changed Swift files: `Scripts/format-swift.sh`
 - Test locally
 - Commit changes with descriptive messages
 
@@ -54,6 +55,7 @@ gh pr create --base main --head <current-branch>
 ```
 
 ## Key Scripts
+- `Scripts/format-swift.sh` - Formats changed Swift files (run before committing)
 - `Scripts/gen_ag_template.sh` - Generates AG template for compatibility testing
 - `Scripts/bump_ag_pr.sh` - Creates PR for DarwinPrivateFramework updates
 

Scripts/format-swift.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Format staged or changed Swift files using SwiftFormat.
+#
+# Usage:
+#   Scripts/format-swift.sh          # Format staged Swift files (pre-commit use)
+#   Scripts/format-swift.sh --all    # Format all Swift files in the project
+#   Scripts/format-swift.sh <file>   # Format specific file(s)
+
+set -euo pipefail
+
+REPO_ROOT="$(git rev-parse --show-toplevel)"
+
+if ! command -v swiftformat &>/dev/null; then
+    echo "error: swiftformat is not installed. Run: brew install swiftformat" >&2
+    exit 1
+fi
+
+if [ $# -eq 0 ]; then
+    # Format staged Swift files
+    files=$(git diff --cached --name-only --diff-filter=ACM | grep '\.swift$' || true)
+    if [ -z "$files" ]; then
+        # Fall back to unstaged changes
+        files=$(git diff --name-only --diff-filter=ACM | grep '\.swift$' || true)
+    fi
+    if [ -z "$files" ]; then
+        echo "No changed Swift files to format."
+        exit 0
+    fi
+    echo "Formatting changed Swift files..."
+    echo "$files" | while IFS= read -r file; do
+        echo "  $file"
+    done
+    echo "$files" | xargs swiftformat --config "$REPO_ROOT/.swiftformat"
+elif [ "$1" = "--all" ]; then
+    echo "Formatting all Swift files..."
+    swiftformat "$REPO_ROOT"
+else
+    echo "Formatting specified files..."
+    swiftformat --config "$REPO_ROOT/.swiftformat" "$@"
+fi

Sources/OpenAttributeGraph/Attribute/Attribute/AnyAttribute.swift

@@ -19,16 +19,16 @@ extension AnyAttribute {
     public init<Value>(_ attribute: Attribute<Value>) {
         self = attribute.identifier
     }
-    
+
     public func unsafeCast<Value>(to _: Value.Type) -> Attribute<Value> {
         Attribute<Value>(identifier: self)
     }
-    
+
     public static var current: AnyAttribute? {
         let current = __OAGGraphGetCurrentAttribute()
         return current == .nil ? nil : current
     }
-    
+
     public func unsafeOffset(at offset: Int) -> AnyAttribute {
         create(offset: offset)
     }
@@ -44,7 +44,7 @@ extension AnyAttribute {
     public func addInput<Value>(_ attribute: Attribute<Value>, options: OAGInputOptions = [], token: Int) {
         addInput(attribute.identifier, options: options, token: token)
     }
-    
+
     // FIXME: Use AttributeType instead
     public func visitBody<Body: AttributeBodyVisitor>(_ visitor: inout Body) {
         let bodyType = info.type.advanced(by: 1).pointee.self_id.type as! _AttributeBody.Type
@@ -60,11 +60,11 @@ extension AnyAttribute {
             body(&value.assumingMemoryBound(to: Value.self).pointee)
         }
     }
-    
+
     public func breadthFirstSearch(options _: SearchOptions = [], _: (AnyAttribute) -> Bool) -> Bool {
         fatalError("TODO")
     }
-    
+
     public var _bodyType: Any.Type {
         info.type.pointee.self_id.type
     }
@@ -85,7 +85,7 @@ extension AnyAttribute {
         nonmutating set {
             _indirectDependency = newValue ?? .nil
         }
-    }    
+    }
 }
 
 // MARK: CustomStringConvertible