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taskd.go
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taskd.go
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//go:generate protoc --go_out=plugins=grpc:. proto/snippet_service.proto
package main
import (
"context"
"flag"
"fmt"
"log"
"net"
"os"
"path/filepath"
"strings"
"time"
"github.com/phil0522/taskd/pkg/server"
"github.com/phil0522/taskd/pkg/slog"
pb "github.com/phil0522/taskd/proto"
"google.golang.org/grpc"
"gopkg.in/sevlyar/go-daemon.v0"
)
const (
version = "0.2.0"
serverAddr = "127.0.0.1:6398"
)
var (
category = flag.String("category", "shell", "only output snippet of specific category")
)
func serve() {
log.Printf("starting server")
lis, err := net.Listen("tcp4", serverAddr)
if err != nil {
log.Fatalf("failed to listen: %v", err)
}
defer func() {
log.Printf("server exit")
}()
grpcServer := grpc.NewServer()
snipperServer := &server.SnippetServer{
GrpcServer: grpcServer,
}
snipperServer.Initialize()
pb.RegisterSnippetServiceServer(grpcServer, snipperServer)
grpcServer.Serve(lis)
}
func formatSnippet(snippet *pb.ShellSnippet) {
name := strings.ReplaceAll(snippet.GetSnippetName(), ":", "")
desc := strings.ReplaceAll(snippet.GetSnippetDescription(), ":", "")
cmd := snippet.GetSnippetCommand()
//cmd := strings.ReplaceAll(snippet.GetSnippetCommand(), "\n", "")
fmt.Printf("%s:%s:%s\n", name, desc, cmd)
}
func searchShell(ctx context.Context, client pb.SnippetServiceClient) {
req := &pb.ShellSnippetRequest{}
req.Category = *category
resp, err := client.SearchShellSnippet(ctx, req)
if err != nil {
log.Fatalf("failed to execute rpc %s", err.Error())
}
for _, snippet := range resp.ShellSnippets {
formatSnippet(snippet)
}
}
func killServer(ctx context.Context, client pb.SnippetServiceClient) {
_, err := client.QuitServer(ctx, &pb.QuitServerRequest{})
if err != nil {
log.Fatalf("failed to quit server rpc %s", err.Error())
}
}
func clientCall(callback func(context.Context, pb.SnippetServiceClient)) {
conn, err := grpc.Dial(serverAddr, grpc.WithInsecure())
if err != nil {
log.Fatalf("failed to create connection, %s", err.Error())
}
client := pb.NewSnippetServiceClient(conn)
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
callback(ctx, client)
}
func executeCommand() {
if flag.NArg() > 0 && flag.Arg(0) == "kill-server" {
clientCall(killServer)
return
}
clientCall(searchShell)
}
func main() {
flag.BoolVar(&slog.VerboseLog, "verbose", false, "enable debugging log")
flag.Parse()
logger := slog.New("main")
if flag.NArg() > 0 && flag.Arg(0) == "version" {
fmt.Println(version)
return
}
if flag.NArg() == 0 && *category == "" {
logger.Infof("category must be specified.")
return
}
userRoot := os.Getenv("HOME")
context := daemon.Context{
PidFileName: filepath.Join(userRoot, "taskd.lock"),
PidFilePerm: 0644,
LogFileName: filepath.Join(userRoot, "taskd.log"),
LogFilePerm: 0666,
WorkDir: userRoot,
}
child, _ := context.Search()
if child != nil {
logger.Debugf("Server has been already serving")
executeCommand()
return
}
if flag.NArg() > 0 && flag.Arg(0) == "kill-server" {
log.Printf("server is not running, do nothing")
return
}
child, err := context.Reborn()
if err != nil {
log.Fatal(err.Error())
}
if child != nil {
time.Sleep(time.Second * 1)
executeCommand()
} else {
serve()
defer context.Release()
}
}