// Exists determines if the current build supports incremental workflow.
// It checks if the previous image exists in the system and if so, then it
// verifies that the save-artifacts script is present.
func (b *STI) Exists(config *api.Config) bool {
if !config.Incremental {
return false
}
policy := config.PreviousImagePullPolicy
if len(policy) == 0 {
policy = api.DefaultPreviousImagePullPolicy
}
result, err := dockerpkg.PullImage(config.Tag, b.incrementalDocker, policy, false)
if err != nil {
glog.V(2).Infof("Unable to pull previously build %q image: %v", config.Tag, err)
return false
}
return result.Image != nil && b.installedScripts[api.SaveArtifacts]
}
// Exists determines if the current build supports incremental workflow.
// It checks if the previous image exists in the system and if so, then it
// verifies that the save-artifacts script is present.
func (builder *STI) Exists(config *api.Config) bool {
if !config.Incremental {
return false
}
policy := config.PreviousImagePullPolicy
if len(policy) == 0 {
policy = api.DefaultPreviousImagePullPolicy
}
tag := firstNonEmpty(config.IncrementalFromTag, config.Tag)
result, err := dockerpkg.PullImage(tag, builder.incrementalDocker, policy, false)
if err != nil {
builder.result.BuildInfo.FailureReason = utilstatus.NewFailureReason(
utilstatus.ReasonPullPreviousImageFailed,
utilstatus.ReasonMessagePullPreviousImageFailed,
)
glog.V(2).Infof("Unable to pull previously built image %q: %v", tag, err)
return false
}
return result.Image != nil && builder.installedScripts[api.SaveArtifacts]
}