Diff and Merge

def tree_changes(object_store, old_tree: bytes, new_tree: bytes, 
                 want_unchanged: bool = False, rename_detector=None,
                 change_type_same: bool = False) -> Iterator[TreeChange]:
    """
    Find changes between two trees.
    
    Args:
        object_store: Object store for loading trees
        old_tree: SHA of old tree (None for empty)
        new_tree: SHA of new tree (None for empty)  
        want_unchanged: Include unchanged files
        rename_detector: RenameDetector instance
        change_type_same: Include type changes as same
        
    Yields:
        TreeChange objects describing changes
    """

def tree_changes_for_merge(object_store, tree1: bytes, tree2: bytes, 
                          base_tree: bytes) -> Iterator[TreeChange]:
    """
    Find changes for three-way merge.
    
    Args:
        object_store: Object store for loading trees
        tree1: SHA of first tree
        tree2: SHA of second tree
        base_tree: SHA of common base tree
        
    Yields:
        TreeChange objects for merge conflicts
    """

def walk_trees(object_store, tree1_id: bytes, tree2_id: bytes, 
               prune_identical: bool = True) -> Iterator[Tuple]:
    """
    Walk two trees simultaneously.
    
    Args:
        object_store: Object store for loading trees
        tree1_id: SHA of first tree
        tree2_id: SHA of second tree
        prune_identical: Skip identical subtrees
        
    Yields:
        Tuples of (path, mode1, sha1, mode2, sha2)
    """

def diff_tree_to_tree(object_store, old_tree: bytes, new_tree: bytes,
                      outf=None) -> bytes:
    """
    Generate unified diff between two trees.
    
    Args:
        object_store: Object store for loading objects
        old_tree: SHA of old tree
        new_tree: SHA of new tree
        outf: Optional output file
        
    Returns:
        Diff as bytes if outf is None
    """

def diff_index_to_tree(object_store, index_path: str, tree: bytes,
                       outf=None) -> bytes:
    """
    Generate diff between index and tree.
    
    Args:
        object_store: Object store for loading objects
        index_path: Path to index file
        tree: SHA of tree to compare against
        outf: Optional output file
        
    Returns:
        Diff as bytes if outf is None
    """

def diff_working_tree_to_tree(object_store, tree: bytes, root_path: str = ".",
                              outf=None) -> bytes:
    """
    Generate diff between working tree and Git tree.
    
    Args:
        object_store: Object store for loading objects
        tree: SHA of tree to compare against
        root_path: Root path of working tree
        outf: Optional output file
        
    Returns:
        Diff as bytes if outf is None
    """

def diff_working_tree_to_index(object_store, index_path: str, 
                               root_path: str = ".", outf=None) -> bytes:
    """
    Generate diff between working tree and index.
    
    Args:
        object_store: Object store for loading objects
        index_path: Path to index file
        root_path: Root path of working tree
        outf: Optional output file
        
    Returns:
        Diff as bytes if outf is None
    """

class RenameDetector:
    """Detect renames and copies in tree changes."""
    
    def __init__(self, object_store, rename_threshold: int = 60,
                 copy_threshold: int = 60, max_files: int = None,
                 big_file_threshold: int = None): ...
    
    def changes_with_renames(self, changes: List[TreeChange]) -> List[TreeChange]:
        """
        Process changes to detect renames and copies.
        
        Args:
            changes: List of TreeChange objects
            
        Returns:
            List of TreeChange objects with renames detected
        """
    
    def find_renames(self, added_files: List[TreeChange], 
                     deleted_files: List[TreeChange]) -> List[Tuple[TreeChange, TreeChange]]:
        """
        Find renames between added and deleted files.
        
        Args:
            added_files: List of added files
            deleted_files: List of deleted files
            
        Returns:
            List of (deleted, added) pairs that are renames
        """

class TreeChange:
    """Represents a change between two trees."""
    
    type: str  # 'add', 'delete', 'modify', 'rename', 'copy', 'unchanged'
    old: TreeEntry  # (name, mode, sha) or None
    new: TreeEntry  # (name, mode, sha) or None
    
    def __init__(self, type: str, old: TreeEntry = None, new: TreeEntry = None): ...
    
    @property
    def is_rename(self) -> bool:
        """True if this change represents a rename."""
    
    @property
    def is_copy(self) -> bool:
        """True if this change represents a copy."""
    
    @property
    def is_modify(self) -> bool:
        """True if this change represents a modification."""

class ColorizedDiffStream:
    """Stream wrapper that adds ANSI color codes to diff output."""
    
    def __init__(self, f, color_config=None): ...
    
    def write(self, data: bytes) -> None:
        """Write colorized diff data to underlying stream."""

from dulwich.repo import Repo
from dulwich.diff_tree import tree_changes

# Open repository
repo = Repo('.')

# Get two commits to compare
commit1 = repo[b'HEAD~1'] 
commit2 = repo[b'HEAD']

# Find changes between the commits
changes = tree_changes(repo.object_store, commit1.tree, commit2.tree)

for change in changes:
    if change.type == 'add':
        print(f"Added: {change.new.path}")
    elif change.type == 'delete':
        print(f"Deleted: {change.old.path}")
    elif change.type == 'modify':
        print(f"Modified: {change.new.path}")

from dulwich.repo import Repo
from dulwich.diff import diff_tree_to_tree
import sys

repo = Repo('.')

# Compare two commits
commit1 = repo[b'HEAD~1']
commit2 = repo[b'HEAD']

# Generate unified diff
diff_output = diff_tree_to_tree(repo.object_store, commit1.tree, commit2.tree)

# Write to stdout
sys.stdout.buffer.write(diff_output)

from dulwich.repo import Repo
from dulwich.diff_tree import tree_changes, RenameDetector

repo = Repo('.')

# Create rename detector
rename_detector = RenameDetector(repo.object_store, rename_threshold=50)

# Get changes between commits
commit1 = repo[b'HEAD~1']
commit2 = repo[b'HEAD']

changes = list(tree_changes(repo.object_store, commit1.tree, commit2.tree))

# Detect renames
changes_with_renames = rename_detector.changes_with_renames(changes)

for change in changes_with_renames:
    if change.is_rename:
        print(f"Renamed: {change.old.path} -> {change.new.path}")
    elif change.is_copy:
        print(f"Copied: {change.old.path} -> {change.new.path}")

from dulwich.repo import Repo
from dulwich.diff import diff_working_tree_to_tree

repo = Repo('.')

# Compare working tree to HEAD
head_tree = repo[repo.head()].tree
diff_output = diff_working_tree_to_tree(repo.object_store, head_tree)

print(diff_output.decode('utf-8'))

from dulwich.repo import Repo
from dulwich.diff import diff_tree_to_tree, ColorizedDiffStream
import sys

repo = Repo('.')

# Create colorized output stream
colorized_stream = ColorizedDiffStream(sys.stdout.buffer)

# Generate colorized diff
commit1 = repo[b'HEAD~1']
commit2 = repo[b'HEAD']

diff_tree_to_tree(repo.object_store, commit1.tree, commit2.tree, 
                  outf=colorized_stream)