Function ScanRepositoryUsingGraph

sizes/graph.go:65–336

ScanRepositoryUsingGraph scans `repo`, using `rg` to decide which references to scan and how to group them. `nameStyle` specifies whether the output should include full names, hashes only, or nothing in the footnotes. `progress` tells whether a progress meter should be displayed while it works. It

(
	repo *git.Repository, rg RefGrouper, nameStyle NameStyle,
	progressMeter meter.Progress,
)

//
// It returns the size data for the repository.
func ScanRepositoryUsingGraph(
	repo *git.Repository, rg RefGrouper, nameStyle NameStyle,
	progressMeter meter.Progress,
) (HistorySize, error) {
	ctx, cancel := context.WithCancel(context.TODO())
	defer cancel()

	graph := NewGraph(rg, nameStyle)

	refIter, err := repo.NewReferenceIter(ctx)
	if err != nil {
		return HistorySize{}, err
	}

	objIter, err := repo.NewObjectIter(context.TODO())
	if err != nil {
		return HistorySize{}, err
	}

	errChan := make(chan error, 1)
	var refsSeen []refSeen
	// Feed the references that we want into the stdin of the object
	// iterator:
	go func() {
		defer objIter.Close()

		errChan <- func() error {
			for {
				ref, ok, err := refIter.Next()
				if err != nil {
					return err
				}
				if !ok {
					return nil
				}

				walk, groups := rg.Categorize(ref.Refname)

				refsSeen = append(
					refsSeen,
					refSeen{
						Reference: ref,
						walked:    walk,
						groups:    groups,
					},
				)

				if !walk {
					continue
				}

				if err := objIter.AddRoot(ref.OID); err != nil {
					return err
				}
			}
		}()
	}()