gotools/internal/diff/unified.go

const DefaultContextLines …

// Unified returns a unified diff of the old and new strings.
// The old and new labels are the names of the old and new files.
// If the strings are equal, it returns the empty string.
func Unified(oldLabel, newLabel, old, new string) string { … }

// ToUnified applies the edits to content and returns a unified diff,
// with contextLines lines of (unchanged) context around each diff hunk.
// The old and new labels are the names of the content and result files.
// It returns an error if the edits are inconsistent; see ApplyEdits.
func ToUnified(oldLabel, newLabel, content string, edits []Edit, contextLines int) (string, error) { … }

type unified …

type hunk …

type line …

type opKind …

const opDelete …

const opInsert …

const opEqual …

// String returns a human readable representation of an OpKind. It is not
// intended for machine processing.
func (k opKind) String() string { … }

// toUnified takes a file contents and a sequence of edits, and calculates
// a unified diff that represents those edits.
func toUnified(fromName, toName string, content string, edits []Edit, contextLines int) (unified, error) { … }

func splitLines(text string) []string { … }

func addEqualLines(h *hunk, lines []string, start, end int) int { … }

// String converts a unified diff to the standard textual form for that diff.
// The output of this function can be passed to tools like patch.
func (u unified) String() string { … }