diff

package

v0.6.0 Latest Latest Go to latest Published: Dec 5, 2025 License: Apache-2.0 Imports: 7 Imported by: 0

Details

Package diff parses git diff output to identify changed lines for incremental mutation testing.

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type Change struct {
	StartLine int
	EndLine   int
}

Change represents a contiguous range of changed lines in a file.

type Diff map[FileName][]Change

Diff maps file names to their list of changes.

func New() (Diff, error)

New creates a new Diff by parsing git diff output using the default command executor.

func NewWithCmd[T execCmd](cmdContext func(name string, args ...string) T) (Diff, error)

NewWithCmd creates a new Diff by parsing git diff output using a custom command executor. This is useful for testing.

func (d Diff) IsChanged(pos token.Position) bool

IsChanged returns true if the given position is within a changed region. If the diff is empty, it returns true for all positions.

type FileName string

FileName represents a file path in a diff.