Function CheckCacheExpiration

pkg/java/java.go:171–191

CheckCacheExpiration clears the m2 layer and sets a new expiry timestamp when the cache is past expiration.

(ctx *gcp.Context, m2CachedRepo *libcnb.Layer)

// CheckCacheExpiration clears the m2 layer and sets a new expiry timestamp when the cache is past expiration.
func CheckCacheExpiration(ctx *gcp.Context, m2CachedRepo *libcnb.Layer) error {
	t := time.Now()
	expiry := ctx.GetMetadata(m2CachedRepo, expiryTimestampKey)
	if expiry != "" {
		var err error
		t, err = time.Parse(dateFormat, expiry)
		if err != nil {
			ctx.Debugf("Could not parse expiration date %q, assuming now: %v", expiry, err)
		}
	}
	if t.After(time.Now()) {
		return nil
	}

	ctx.Debugf("Cache expired on %v, clearing", t)
	if err := ctx.ClearLayer(m2CachedRepo); err != nil {
		return fmt.Errorf("clearing layer %q: %w", m2CachedRepo.Name, err)
	}
	ctx.SetMetadata(m2CachedRepo, expiryTimestampKey, time.Now().Add(repoExpiration).Format(dateFormat))
	return nil
}

// MvnCmd returns the command that should be used to invoke maven for this build.
func MvnCmd(ctx *gcp.Context) (string, error) {