/
dependency_graph.go
45 lines (40 loc) · 1.33 KB
/
dependency_graph.go
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package crane
import (
"io"
"text/template"
)
// DependencyGraph maps container names
// to their dependencies
type DependencyGraph map[string]*Dependencies
type dotInput struct {
Graph DependencyGraph
TargetedContainers Containers
}
// dumps the dependency graph as a DOT to the writer
func (graph DependencyGraph) DOT(writer io.Writer, targetedContainers Containers) {
const dotTemplate = `{{ $targetedContainers := .TargetedContainers }}digraph {
{{ range $name, $dependencies := .Graph }}{{ with $dependencies }} "{{ $name }}" [style=bold{{ range $targetedContainers }}{{ if eq $name .Name }},color=red{{ end }}{{ end }}]
{{ range .Link }} "{{ $name }}"->"{{ . }}"
{{ end }}{{ range .VolumesFrom }} "{{ $name }}"->"{{ . }}" [style=dashed]
{{ end }}{{ if ne .Net "" }} "{{ $name }}"->"{{ .Net }}" [style=dotted]
{{ end }}{{ end }}{{ end }}}
`
template, err := template.New("dot").Parse(dotTemplate)
if err != nil {
printErrorf("ERROR: %s\n", err)
return
}
err = template.Execute(writer, dotInput{graph, targetedContainers})
if err != nil {
printErrorf("ERROR: %s\n", err)
}
}
// resolve deletes the given name from the
// dependency graph and removes it from all
// dependencies.
func (d DependencyGraph) resolve(resolved string) {
delete(d, resolved)
for _, dependencies := range d {
dependencies.remove(resolved)
}
}