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release_graph.go
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release_graph.go
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package misc
import (
"bytes"
"errors"
"fmt"
"html/template"
"strings"
boshlog "github.com/cloudfoundry/bosh-utils/logger"
boshsys "github.com/cloudfoundry/bosh-utils/system"
bhjobui "github.com/bosh-io/web/ui/job"
bhrelui "github.com/bosh-io/web/ui/release"
)
type ReleaseGraph struct {
pkgs []bhrelui.Package
jobs []bhjobui.Job
runner boshsys.CmdRunner
logTag string
logger boshlog.Logger
}
func NewReleaseGraph(
pkgs []bhrelui.Package,
jobs []bhjobui.Job,
runner boshsys.CmdRunner,
logger boshlog.Logger,
) ReleaseGraph {
return ReleaseGraph{
pkgs: pkgs,
jobs: jobs,
runner: runner,
logTag: "ReleaseGraph",
logger: logger,
}
}
func (g ReleaseGraph) SVG() template.HTML {
return g.render(nil)
}
func (g ReleaseGraph) FocusedSVG(focusedPkg bhrelui.Package) template.HTML {
return g.render(&focusedPkg)
}
func (g ReleaseGraph) render(focusedPkg *bhrelui.Package) template.HTML {
var in bytes.Buffer
fmt.Fprintf(&in, "digraph packages {\n")
fmt.Fprintf(&in, " size=\"11,1000\";\n")
fmt.Fprintf(&in, " overlap=\"false\";\n")
fmt.Fprintf(&in, " packMode=\"node\";\n")
fmt.Fprintf(&in, " splines=\"spline\";\n")
fmt.Fprintf(&in, " sep=\"+20\";\n")
for i, pkg := range g.pkgs {
nodeI := i
style := ", style=\"\", color=\"#ffffff\", fontname=\"Helvetica\""
fmt.Fprintf(
&in,
" n%d [label=\"%s\", URL=\"%s\", tooltip=\"%s\" %s];\n",
nodeI, pkg.Name, pkg.URL(), pkg.Fingerprint, style,
)
for _, depPkg := range pkg.Dependencies {
// Draw edge between pkg and its depPkg
for allI, allPkg := range g.pkgs {
if depPkg.Name == allPkg.Name {
fmt.Fprintf(&in, " n%d -> n%d [style=\"dotted\"];\n", nodeI, allI)
break
}
}
}
}
pkgsLen := len(g.pkgs)
for i, job := range g.jobs {
nodeI := pkgsLen + i
style := ", style=\"filled\", color=\"#7E0180\", fontname=\"Helvetica\", fontcolor=\"white\""
fmt.Fprintf(
&in,
" n%d [label=\"%s\", URL=\"%s\", nodesep=\"1\", shape=\"box\" %s];\n",
nodeI, job.Name, job.URL(), style,
)
for _, depPkg := range job.Packages {
// Draw edge between pkg and its depPkg
for allI, allPkg := range g.pkgs {
if depPkg.Name == allPkg.Name {
fmt.Fprintf(&in, " n%d -> n%d [style=\"\"];\n", nodeI, allI)
break
}
}
}
}
in.WriteString("}\n")
stdout, _, _, err := g.runner.RunCommandWithInput(
string(in.Bytes()),
"sfdp",
"-Tsvg",
)
if err != nil {
g.logger.Error(g.logTag, "Failed to render: %s", err.Error())
// Ignoring err from 'sfdp'
}
i := strings.Index(stdout, "<svg")
if i < 0 {
g.logger.Error(g.logTag, "Failed to find <svg")
return template.HTML(errors.New("<svg not found").Error())
}
return template.HTML(stdout[i:])
}