/
graph.go
80 lines (67 loc) · 1.68 KB
/
graph.go
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package command
import (
"log"
"os"
"github.com/dnaeon/gru/catalog"
"github.com/dnaeon/gru/graph"
"github.com/dnaeon/gru/resource"
"github.com/urfave/cli"
"github.com/yuin/gopher-lua"
)
// NewGraphCommand creates a new sub-command for
// generating the resource DAG graph
func NewGraphCommand() cli.Command {
cmd := cli.Command{
Name: "graph",
Usage: "generate graph representation of resources",
Action: execGraphCommand,
Flags: []cli.Flag{
cli.StringFlag{
Name: "siterepo",
Value: "",
Usage: "path/url to the site repo",
EnvVar: "GRU_SITEREPO",
},
},
}
return cmd
}
// Executes the "graph" command
func execGraphCommand(c *cli.Context) error {
if len(c.Args()) < 1 {
return cli.NewExitError(errNoModuleName.Error(), 64)
}
L := lua.NewState()
defer L.Close()
module := c.Args()[0]
config := &catalog.Config{
Module: module,
DryRun: true,
Logger: log.New(os.Stdout, "", log.LstdFlags),
SiteRepo: c.String("siterepo"),
L: L,
}
katalog := catalog.New(config)
resource.LuaRegisterBuiltin(L)
if err := L.DoFile(module); err != nil {
return cli.NewExitError(err.Error(), 1)
}
collection, err := resource.CreateCollection(katalog.Unsorted)
if err != nil {
return cli.NewExitError(err.Error(), 1)
}
g, err := collection.DependencyGraph()
if err != nil {
return cli.NewExitError(err.Error(), 1)
}
g.AsDot("resources", os.Stdout)
g.Reversed().AsDot("reversed", os.Stdout)
sorted, err := g.Sort()
if err == graph.ErrCircularDependency {
circular := graph.New()
circular.AddNode(sorted...)
circular.AsDot("circular", os.Stdout)
return cli.NewExitError(graph.ErrCircularDependency.Error(), 1)
}
return nil
}