style: Apply go fmt to go code (#2046)

~I will add pre-commit hook later if I find a good one~

Found a nice repo, but it is no longer maintained:
https://github.com/dnephin/pre-commit-golang
So, I implemented the check as a local hook.

.pre-commit-config.yaml

@@ -30,3 +30,12 @@ repos:
     hooks:
       - id: prettier
         exclude: ^docs/doxygen-awesome-theme/
+
+  - repo: local
+    hooks:
+      - id: gofmt
+        name: Go Format
+        entry: pre-commit-hooks/run-go-fmt.sh
+        types: [go]
+        language: golang
+        description: "Runs `gofmt`, requires golang"

pre-commit-hooks/run-go-fmt.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+#
+# Capture and print stdout, since gofmt doesn't use proper exit codes
+#
+set -e -o pipefail
+
+if ! command -v gofmt &> /dev/null ; then
+    echo "gofmt not installed or available in the PATH" >&2
+    exit 1
+fi
+
+output="$(gofmt -l -w "$@")"
+echo "$output"
+[[ -z "$output" ]]

tools/requests_gun/internal/ammo_provider/ammo_provider.go

@@ -8,22 +8,22 @@ import (
 )
 
 type AmmoProvider struct {
-	ammo           []string
+	ammo          []string
 	currentBullet atomic.Uint64
 }
 
 func (ap *AmmoProvider) getIndex() uint64 {
-    result := ap.currentBullet.Add(1)
+	result := ap.currentBullet.Add(1)
 	return result % uint64(len(ap.ammo))
 }
 
 func (ap *AmmoProvider) GetBullet() string {
-    for {
-        res := ap.ammo[ap.getIndex()]
-        if !strings.HasPrefix(res, "#") {
-            return res
-        }
-    }
+	for {
+		res := ap.ammo[ap.getIndex()]
+		if !strings.HasPrefix(res, "#") {
+			return res
+		}
+	}
 }
 
 func New(reader io.Reader) *AmmoProvider {

tools/requests_gun/internal/parse_args/parse_args.go

@@ -7,7 +7,7 @@ import (
 )
 
 type CliArgs struct {
-	Host         string
+	Host        string
 	Port        uint
 	TargetLoad  uint
 	Ammo        string
@@ -23,7 +23,7 @@ func Parse() (*CliArgs, error) {
 	target_load := flag.UintP("load", "l", 100, "Target requests per second load")
 	print_errors := flag.BoolP("print-errors", "e", false, "Print errors")
 	help := flag.BoolP("help", "h", false, "Print help message")
-    ws := flag.BoolP("ws", "w", false, "Use websocket")
+	ws := flag.BoolP("ws", "w", false, "Use websocket")
 
 	flag.Parse()
 

tools/requests_gun/internal/request_maker/request_maker.go

@@ -4,12 +4,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"github.com/gorilla/websocket"
 	"io"
 	"net/http"
-    "net/url"
+	"net/url"
 	"strings"
 	"time"
-	"github.com/gorilla/websocket"
 )
 
 type RequestMaker interface {
@@ -17,11 +17,11 @@ type RequestMaker interface {
 }
 
 type WebSocketClient struct {
-	conn     *websocket.Conn
+	conn *websocket.Conn
 }
 
 type HttpRequestMaker struct {
-	host       string
+	host      string
 	transport *http.Transport
 	client    *http.Client
 }
@@ -38,10 +38,10 @@ type ResponseData struct {
 
 func (h *HttpRequestMaker) MakeRequest(request string) (*ResponseData, error) {
 	startTime := time.Now()
-    req, err := http.NewRequest("POST", h.host, strings.NewReader(request))
-    if err != nil {
-        return nil, errors.New("Error creating request: " + err.Error())
-    }
+	req, err := http.NewRequest("POST", h.host, strings.NewReader(request))
+	if err != nil {
+		return nil, errors.New("Error creating request: " + err.Error())
+	}
 
 	response, err := h.client.Do(req)
 	requestDuration := time.Since(startTime)
@@ -80,12 +80,12 @@ func NewHttp(host string, port uint) *HttpRequestMaker {
 }
 
 func NewWebSocketClient(host string, port uint) (*WebSocketClient, error) {
-    var u url.URL
-    if !strings.HasPrefix(host, "ws://") && !strings.HasPrefix(host, "wss://") {
-        u = url.URL{Scheme: "ws", Host: host + ":" + fmt.Sprintf("%d", port), Path: "/"}
-    } else {
-        u = url.URL{Host: host + ":" + fmt.Sprintf("%d", port), Path: "/"}
-    }
+	var u url.URL
+	if !strings.HasPrefix(host, "ws://") && !strings.HasPrefix(host, "wss://") {
+		u = url.URL{Scheme: "ws", Host: host + ":" + fmt.Sprintf("%d", port), Path: "/"}
+	} else {
+		u = url.URL{Host: host + ":" + fmt.Sprintf("%d", port), Path: "/"}
+	}
 	conn, _, err := websocket.DefaultDialer.Dial(u.String(), nil)
 	if err != nil {
 		return nil, errors.New("Error connecting to WebSocket: " + err.Error())
@@ -95,24 +95,24 @@ func NewWebSocketClient(host string, port uint) (*WebSocketClient, error) {
 
 // SendMessage sends a message to the WebSocket server
 func (ws *WebSocketClient) SendMessage(message string) (*ResponseData, error) {
-    defer ws.conn.Close()
-    start := time.Now()
-    err := ws.conn.WriteMessage(websocket.TextMessage, []byte(message))
-    if err != nil {
-        return nil, errors.New("Error sending ws message: " + err.Error())
-    }
+	defer ws.conn.Close()
+	start := time.Now()
+	err := ws.conn.WriteMessage(websocket.TextMessage, []byte(message))
+	if err != nil {
+		return nil, errors.New("Error sending ws message: " + err.Error())
+	}
 
-    var msg []byte
-    err = ws.conn.SetReadDeadline(time.Now().Add(5 * time.Second))
-    if err != nil {
-        return nil, errors.New("Error setting timeout: " + err.Error())
-    }
+	var msg []byte
+	err = ws.conn.SetReadDeadline(time.Now().Add(5 * time.Second))
+	if err != nil {
+		return nil, errors.New("Error setting timeout: " + err.Error())
+	}
 	_, msg, err = ws.conn.ReadMessage()
 	if err != nil {
 		return nil, errors.New("Error reading message: " + err.Error())
 	}
-    requestDuration := time.Since(start)
-    ws.conn.Close()
+	requestDuration := time.Since(start)
+	ws.conn.Close()
 
 	var response JsonMap
 	err = json.Unmarshal(msg, &response)

tools/requests_gun/requests_gun.go

@@ -10,25 +10,25 @@ import (
 
 func main() {
 	args, err := parse_args.Parse()
-    if err != nil {
-        fmt.Fprintln(os.Stderr, "Error: ", err)
-        parse_args.PrintUsage()
-        os.Exit(1)
-    }
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "Error: ", err)
+		parse_args.PrintUsage()
+		os.Exit(1)
+	}
 
-    if args.Help {
-        parse_args.PrintUsage()
-        os.Exit(0)
-    }
+	if args.Help {
+		parse_args.PrintUsage()
+		os.Exit(0)
+	}
 
 	fmt.Print("Loading ammo... ")
-    f, err := os.Open(args.Ammo)
-    if err != nil {
-        fmt.Println("Error opening file '", args.Ammo, "': ", err)
-        os.Exit(1)
-    }
+	f, err := os.Open(args.Ammo)
+	if err != nil {
+		fmt.Println("Error opening file '", args.Ammo, "': ", err)
+		os.Exit(1)
+	}
 	ammoProvider := ammo_provider.New(f)
-    f.Close()
+	f.Close()
 	fmt.Println("Done")
 
 	fmt.Println("Firing requests...")