chore: update golang version(v1.16 -> v1.20) & exchange log to fmt an…

…d panic (abema#34)

.github/workflows/ci.yaml

@@ -8,7 +8,7 @@ jobs:
       - name: set up
         uses: actions/setup-go@v1
         with:
-          go-version: 1.16
+          go-version: 1.20
       - name: checkout
         uses: actions/checkout@v1
       - name: cache

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.16-alpine AS builder
+FROM golang:1.20-alpine AS builder
 WORKDIR /app
 COPY go.mod ./
 COPY go.sum ./

go.mod

@@ -1,10 +1,17 @@
 module github.com/abema/github-actions-merger
 
-go 1.16
+go 1.20
 
 require (
 	github.com/google/go-github v17.0.0+incompatible
-	github.com/google/go-querystring v1.1.0 // indirect
 	github.com/kelseyhightower/envconfig v1.4.0
 	golang.org/x/oauth2 v0.0.0-20211005180243-6b3c2da341f1
 )
+
+require (
+	github.com/golang/protobuf v1.4.2 // indirect
+	github.com/google/go-querystring v1.1.0 // indirect
+	golang.org/x/net v0.0.0-20200822124328-c89045814202 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
+)

main.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"log"
 	"regexp"
 	"strings"
 	"text/template"
@@ -35,28 +34,34 @@ func main() {
 	var e env
 	err := envconfig.Process("INPUT", &e)
 	if err != nil {
-		log.Fatal(err.Error())
+		fmt.Printf("failed to load inputs: %s\n", err.Error())
+		panic(err.Error())
 	}
 	ctx, f := context.WithTimeout(context.Background(), jobTimeout)
 	defer f()
 	client := newGHClient(e.GithubToken)
 	if err := validateEnv(e); err != nil {
 		if serr := client.sendMsg(ctx, e.Owner, e.Repo, e.PRNumber, errMsg(err)); serr != nil {
-			log.Fatalf("failed to send message: %v original: %v", serr, err)
+			fmt.Printf("failed to send message: %v original: %v", serr, err)
+			panic(serr.Error())
 		}
-		log.Fatal(err.Error())
+		fmt.Printf("failed to validate env: %v", err)
+		panic(err.Error())
 	}
 	if err := client.merge(ctx, e.Owner, e.Repo, e.PRNumber, e.MergeMethod); err != nil {
 		if serr := client.sendMsg(ctx, e.Owner, e.Repo, e.PRNumber, errMsg(err)); serr != nil {
-			log.Fatalf("failed to send message: %v original: %v", serr, err)
+			fmt.Printf("failed to send message: %v original: %v", serr, err)
+			panic(serr.Error())
 		}
-		log.Fatal(err.Error())
+		fmt.Printf("failed to merge: %v", err)
+		panic(err.Error())
 	}
 	successMsg := "Merged PR #" + fmt.Sprintf("%d", e.PRNumber) + " successfully!"
 	if err := client.sendMsg(ctx, e.Owner, e.Repo, e.PRNumber, successMsg); err != nil {
-		log.Fatal(err.Error())
+		fmt.Printf("failed to send message: %v", err)
+		panic(err.Error())
 	}
-	log.Printf(successMsg)
+	fmt.Printf(successMsg)
 }
 
 func validateEnv(e env) error {