ファイルを追加

.gitignore

@@ -25,3 +25,6 @@ go.work.sum
 # env file
 .env
 
+# build artifacts
+bin/
+dist/

.vscode/extensions.json

@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "golang.go"
+    ]
+}

Makefile

@@ -1,4 +1,4 @@
-App=skacksend
+App=slacksend
 
 .PHONY: fmt vet test build run check
 

README.md

@@ -11,6 +11,7 @@ Slackにメッセージを送信するツール
     - [Aiuto Docs](#aiuto-docs)
       - [Markdown](#markdown)
       - [Webserver](#webserver)
+  - [Deploy](#deploy)
 
 
 ## Environments
@@ -82,3 +83,17 @@ go install golang.org/x/pkgsite/cmd/pkgsite@latest
 pkgsite
 ```
 
+## Deploy
+
+```sh
+make build
+# go build -o bin/slacksend ./cmd/slacksend
+```
+
+デバッグ情報を削ってビルドする場合
+
+```sh
+go build -o bin/slacksend \
+  -ldflags "-s -w" \
+  ./cmd/slacksend
+```

cmd/slacksend/main.go

@@ -10,7 +10,6 @@ func hello() string {
 	return "hello"
 }
 
-
 func main() {
 	os.Exit(cli.Run(os.Args))
 }

internal/cli/cli.go

@@ -6,7 +6,9 @@ import (
 	"io"
 	"os"
 	"strings"
+	"time"
 
+	"gitea.pglikers.com/tools/slacksend/internal/slack"
 	"gitea.pglikers.com/tools/slacksend/internal/version"
 )
 
@@ -14,6 +16,7 @@ type Options struct {
 	ShowVersion bool
 	WebhookURL  string
 	TimeoutSec  int
+	Title       string
 }
 
 func Run(args []string) int {
@@ -31,7 +34,7 @@ func run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 	// other options
 	fs.StringVar(&opt.WebhookURL, "webhook", "", "Slack Incoming Webhook URL (or env SLACK_WEBHOOK_URL)")
 	fs.IntVar(&opt.TimeoutSec, "timeout", 10, "HTTP timeout seconds")
-
+	fs.StringVar(&opt.Title, "title", "", "message title (shown as bold)")
 
 	if err := fs.Parse(args[1:]); err != nil {
 		if err == flag.ErrHelp {
@@ -48,6 +51,12 @@ func run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 		return 0
 	}
 
+	if len(fs.Args()) == 0 && isTerminal(stdin) {
+		fmt.Fprintln(stderr, "message is required. provide args or pipe via stdin")
+		Usage(stderr)
+		return 2
+	}
+
 	// webhook URL の解決: flag > env
 	webhookURL := strings.TrimSpace(opt.WebhookURL)
 	if webhookURL == "" {
@@ -68,8 +77,17 @@ func run(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
 		return 2
 	}
 
-	// TODO: Slack送信（ここはあとで internal/slack に逃がす）
-	fmt.Fprintln(stdout, msg)
+	client := slack.WebhookClient{
+		URL:     webhookURL,
+		Timeout: time.Duration(opt.TimeoutSec) * time.Second,
+	}
+
+	if err := client.Send(opt.Title, msg); err != nil {
+		fmt.Fprintln(stderr, "send failed:", err)
+		return 1
+	}
+
+	fmt.Fprintln(stdout, "ok")
 	return 0
 }
 
@@ -84,3 +102,17 @@ func message(args []string, stdin io.Reader) (string, error) {
 	return strings.TrimSpace(string(b)), nil
 }
 
+// isTerminal reports whether the given reader is a character device (e.g., TTY).
+func isTerminal(r io.Reader) bool {
+	fd, ok := r.(interface {
+		Stat() (os.FileInfo, error)
+	})
+	if !ok {
+		return false
+	}
+	info, err := fd.Stat()
+	if err != nil {
+		return false
+	}
+	return info.Mode()&os.ModeCharDevice != 0
+}

internal/cli/usage.go

@@ -13,6 +13,8 @@ Usage:
   echo "message" | slacksend [options]
 
 Options:
+  --title <title>       Message title (shown as bold)
+  --webhook <url>       Slack Incoming Webhook URL
   -V, --version             show version
   -h, --help     show this help
 

internal/slack/webhook.go

@@ -0,0 +1,108 @@
+package slack
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+	"time"
+)
+
+type WebhookClient struct {
+	URL     string
+	Timeout time.Duration
+}
+
+type block struct {
+	Type string     `json:"type"`
+	Text *blockText `json:"text,omitempty"`
+}
+
+type blockText struct {
+	Type string `json:"type"`
+	Text string `json:"text"`
+}
+
+type payload struct {
+	// Slackはblocksがあってもtextを求めるケースがあるので fallback 用に入れておく
+	Text   string  `json:"text,omitempty"`
+	Blocks []block `json:"blocks,omitempty"`
+}
+
+func (c WebhookClient) Send(title, text string) error {
+	if c.URL == "" {
+		return fmt.Errorf("webhook URL is empty")
+	}
+	if c.Timeout <= 0 {
+		c.Timeout = 10 * time.Second
+	}
+
+	p := makePayload(title, text)
+
+	body, err := json.Marshal(p)
+	if err != nil {
+		return err
+	}
+
+	req, err := http.NewRequest(http.MethodPost, c.URL, bytes.NewReader(body))
+	if err != nil {
+		return err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	res, err := (&http.Client{Timeout: c.Timeout}).Do(req)
+	if err != nil {
+		return err
+	}
+	defer res.Body.Close()
+
+	if res.StatusCode < 200 || res.StatusCode >= 300 {
+		b, _ := io.ReadAll(io.LimitReader(res.Body, 2048))
+		return fmt.Errorf("slack webhook failed: status=%d body=%s", res.StatusCode, string(bytes.TrimSpace(b)))
+	}
+	return nil
+}
+
+func makePayload(title, text string) payload {
+	title = strings.TrimSpace(title)
+	text = strings.TrimSpace(text)
+
+	if title == "" {
+		// blocks なしで普通に送る
+		return payload{Text: text}
+	}
+
+	// blocks で「太字タイトル + 本文」
+	blocks := []block{
+		{
+			Type: "section",
+			Text: &blockText{
+				Type: "mrkdwn",
+				Text: "*" + escapeMrkdwn(title) + "*",
+			},
+		},
+		{
+			Type: "section",
+			Text: &blockText{
+				Type: "mrkdwn",
+				Text: escapeMrkdwn(text),
+			},
+		},
+	}
+
+	// fallback text はtitle + newline + body にしておく
+	return payload{
+		Text:   title + "\n" + text,
+		Blocks: blocks,
+	}
+}
+
+// 最小限のエスケープ( _ ` などはそのまま使いたい人もいるので控えめ)
+// 必要なら後で強化できます。
+func escapeMrkdwn(s string) string {
+	// Slack mrkdwnは基本そのまま送れるので、ここは今は何もしない方が自然です。
+	// 将来的に必要になったらここで置換します。
+	return s
+}