/
main.go
67 lines (53 loc) · 1.35 KB
/
main.go
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package main
import (
"encoding/json"
"flag"
"fmt"
"go/build"
"log"
"net/http"
"os"
"github.com/becheran/depgraph/pkg/mod"
"github.com/becheran/depgraph/pkg/server"
"github.com/becheran/depgraph/pkg/tree"
)
func main() {
var host string
flag.StringVar(&host, "host", "localhost:3001", "Set host name or ip address with port were site shall be served")
flag.Parse()
if flag.NArg() == 0 {
fmt.Println("Package path argument missing")
os.Exit(1)
}
pkgName := flag.Args()[0]
js := generateTree(pkgName)
api := &treeApi{data: js}
server.Run(host, api.Serve)
}
func generateTree(pkgName string) (jsonOut []byte) {
cwd, _ := os.Getwd()
modContent, err := os.ReadFile("go.mod")
if err != nil {
log.Fatalf("Unable to read go.mod file. Err: %s", err.Error())
}
modInfo := mod.NewModInfo(modContent)
ctx := &build.Default
ctx.CgoEnabled = false
treeBuilder := tree.NewTreeBuilder(ctx, modInfo)
pkg, err := treeBuilder.DependencyTree(cwd, pkgName)
if err != nil {
log.Fatalf("Failed to create dependency tree. Err: %s", err.Error())
}
jsonOut, err = json.Marshal(&pkg)
if err != nil {
log.Fatalf("Failed to marshal tree to json. Err: %s", err.Error())
}
return
}
type treeApi struct {
data []byte
}
func (api *treeApi) Serve(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.Write(api.data)
}