Core Storage

• Object storage:
  • Blob: Store the content of a file Blob.Serialize(), Blob.Hash()
  • Tree: Store the content of a directory Tree.Serialize(), Tree.Hash(), ParseTree()
  • Commit: Store the content of a commit Commit.Serialize(), Commit.Hash(), ParseCommit()
  • Object compression using zlib Repository.WriteObject(), Repository.ReadObject()
  • Object validation and size limits isValidObjectType(), ValidateHash()
  • Cross-platform file metadata handling getFileMetadata() (linux.go/win.go)

Index Management

• Index:
  • Store file metadata in the index IndexEntry struct
  • Store file content hash in the index writeIndexEntries()
  • Binary index format with versioning WriteIndex(), ReadIndexFiles()
  • Index checksum validation ReadIndexFiles()
  • 8-byte alignment padding writeIndexEntries(), readIndexEntries()

Commit Operations

• Commit:
  • Store commit metadata NewCommit(), Sign struct
  • Store commit message Commit.Serialize()
  • Support multiple parent commits Commit.ParentHash[]
  • Store tree hash Commit.TreeHash
  • Update HEAD reference Repository.UpdateHEAD()
  • Timezone handling in signatures Sign.String()

Tree Operations

• Tree:
  • Store directory structure Tree.entries
  • Support multiple file modes isValidMode()
  • Sort entries for consistent hashing Tree.Serialize()
  • Binary tree format Tree.Serialize(), ParseTree()
  • Tree entry validation ParseTree()

Repository Management

• Repository:
  • Initialize new repository InitRepository()
  • Write objects with SHA1 hashing HashObject(), HashFile(), HashContent()
  • Read objects with type validation Repository.ReadObject()
  • Add files to staging Repository.AddFile()
  • Commit changes Repository.Commit()
  • Update HEAD reference Repository.UpdateHEAD()

Work in Progress

• Remote Operations:

  • Push to remote repository Push() (defined in interface)
  • Pull from remote repository Pull() (defined in interface)
  • Clone repository Clone() (defined in interface)
  • Fetch updates (not implemented)

• Branch Management:

  • Create branches (not implemented)
  • Switch branches (not implemented)
  • Merge branches (not implemented)
  • Delete branches (not implemented)

• Log and History:

  • View commit history Log() (defined in interface)
  • Show commit details (not implemented)
  • Display file changes (not implemented)

Additional Features Needed

• Working Directory:

  • Status tracking (not implemented)
  • Dirty state detection (not implemented)
  • Ignore patterns (.ggignore) (not implemented)

• Recovery and Maintenance:

  • Garbage collection (not implemented)
  • Object verification (not implemented)
  • Repository repair tools (not implemented)

• Configuration:

  • User settings (not implemented)
  • Repository config (not implemented)
  • Global config (not implemented)