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image_pipeline.go
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/
image_pipeline.go
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package graphview
import (
"sort"
"github.com/gonum/graph"
osgraph "github.com/openshift/origin/pkg/api/graph"
buildedges "github.com/openshift/origin/pkg/build/graph"
buildgraph "github.com/openshift/origin/pkg/build/graph/nodes"
imageedges "github.com/openshift/origin/pkg/image/graph"
imagegraph "github.com/openshift/origin/pkg/image/graph/nodes"
)
// ImagePipeline represents a build, its output, and any inputs. The input
// to a build may be another ImagePipeline.
type ImagePipeline struct {
Image ImageTagLocation
DestinationResolved bool
Build *buildgraph.BuildConfigNode
LastSuccessfulBuild *buildgraph.BuildNode
LastUnsuccessfulBuild *buildgraph.BuildNode
ActiveBuilds []*buildgraph.BuildNode
// If set, the base image used by the build
BaseImage ImageTagLocation
// If set, the source repository that inputs to the build
Source SourceLocation
}
// ImageTagLocation identifies the source or destination of an image. Represents
// both a tag in a Docker image repository, as well as a tag in an OpenShift image stream.
type ImageTagLocation interface {
ID() int
ImageSpec() string
ImageTag() string
}
// SourceLocation identifies a repository that is an input to a build.
type SourceLocation interface {
ID() int
}
func AllImagePipelinesFromBuildConfig(g osgraph.Graph, excludeNodeIDs IntSet) ([]ImagePipeline, IntSet) {
covered := IntSet{}
pipelines := []ImagePipeline{}
for _, uncastNode := range g.NodesByKind(buildgraph.BuildConfigNodeKind) {
if excludeNodeIDs.Has(uncastNode.ID()) {
continue
}
pipeline, covers := NewImagePipelineFromBuildConfigNode(g, uncastNode.(*buildgraph.BuildConfigNode))
covered.Insert(covers.List()...)
pipelines = append(pipelines, pipeline)
}
sort.Sort(SortedImagePipelines(pipelines))
return pipelines, covered
}
// NewImagePipeline attempts to locate a build flow from the provided node. If no such
// build flow can be located, false is returned.
func NewImagePipelineFromBuildConfigNode(g osgraph.Graph, bcNode *buildgraph.BuildConfigNode) (ImagePipeline, IntSet) {
covered := IntSet{}
covered.Insert(bcNode.ID())
flow := ImagePipeline{}
base, src, coveredInputs, _ := findBuildInputs(g, bcNode)
covered.Insert(coveredInputs.List()...)
flow.BaseImage = base
flow.Source = src
flow.Build = bcNode
flow.LastSuccessfulBuild, flow.LastUnsuccessfulBuild, flow.ActiveBuilds = buildedges.RelevantBuilds(g, flow.Build)
// we should have at most one
for _, buildOutputNode := range g.SuccessorNodesByEdgeKind(bcNode, buildedges.BuildOutputEdgeKind) {
// this will handle the imagestream tag case
for _, input := range g.SuccessorNodesByEdgeKind(buildOutputNode, imageedges.ReferencedImageStreamGraphEdgeKind) {
imageStreamNode := input.(*imagegraph.ImageStreamNode)
flow.DestinationResolved = (len(imageStreamNode.Status.DockerImageRepository) != 0)
}
// TODO handle the DockerImage case
}
return flow, covered
}
// NewImagePipelineFromImageTagLocation returns the ImagePipeline and all the nodes contributing to it
func NewImagePipelineFromImageTagLocation(g osgraph.Graph, node graph.Node, imageTagLocation ImageTagLocation) (ImagePipeline, IntSet) {
covered := IntSet{}
covered.Insert(node.ID())
flow := ImagePipeline{}
flow.Image = imageTagLocation
for _, input := range g.PredecessorNodesByEdgeKind(node, buildedges.BuildOutputEdgeKind) {
covered.Insert(input.ID())
build := input.(*buildgraph.BuildConfigNode)
if flow.Build != nil {
// report this as an error (unexpected duplicate input build)
}
if build.BuildConfig == nil {
// report this as as a missing build / broken link
break
}
base, src, coveredInputs, _ := findBuildInputs(g, build)
covered.Insert(coveredInputs.List()...)
flow.BaseImage = base
flow.Source = src
flow.Build = build
flow.LastSuccessfulBuild, flow.LastUnsuccessfulBuild, flow.ActiveBuilds = buildedges.RelevantBuilds(g, flow.Build)
}
for _, input := range g.SuccessorNodesByEdgeKind(node, imageedges.ReferencedImageStreamGraphEdgeKind) {
covered.Insert(input.ID())
imageStreamNode := input.(*imagegraph.ImageStreamNode)
flow.DestinationResolved = (len(imageStreamNode.Status.DockerImageRepository) != 0)
}
return flow, covered
}
func findBuildInputs(g osgraph.Graph, bcNode *buildgraph.BuildConfigNode) (base ImageTagLocation, source SourceLocation, covered IntSet, err error) {
covered = IntSet{}
// find inputs to the build
for _, input := range g.PredecessorNodesByEdgeKind(bcNode, buildedges.BuildInputEdgeKind) {
if source != nil {
// report this as an error (unexpected duplicate source)
}
covered.Insert(input.ID())
source = input.(SourceLocation)
}
for _, input := range g.PredecessorNodesByEdgeKind(bcNode, buildedges.BuildInputImageEdgeKind) {
if base != nil {
// report this as an error (unexpected duplicate input build)
}
covered.Insert(input.ID())
base = input.(ImageTagLocation)
}
return
}
type SortedImagePipelines []ImagePipeline
func (m SortedImagePipelines) Len() int { return len(m) }
func (m SortedImagePipelines) Swap(i, j int) { m[i], m[j] = m[j], m[i] }
func (m SortedImagePipelines) Less(i, j int) bool {
return CompareImagePipeline(&m[i], &m[j])
}
func CompareImagePipeline(a, b *ImagePipeline) bool {
switch {
case a.Build != nil && b.Build != nil && a.Build.BuildConfig != nil && b.Build.BuildConfig != nil:
return CompareObjectMeta(&a.Build.BuildConfig.ObjectMeta, &b.Build.BuildConfig.ObjectMeta)
case a.Build != nil && a.Build.BuildConfig != nil:
return true
case b.Build != nil && b.Build.BuildConfig != nil:
return false
}
if a.Image == nil || b.Image == nil {
return true
}
return a.Image.ImageSpec() < b.Image.ImageSpec()
}