Use env, add dockerfile/CI

.drone.yml

@@ -0,0 +1,22 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: publish
+    image: plugins/docker
+    settings:
+      auto_tag: true
+      registry:
+        from_secret: docker_registry
+      repo:
+        from_secret: docker_repo
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        - push
+        - tag
+      branch: master

Dockerfile

@@ -0,0 +1,24 @@
+FROM golang:alpine as golang
+WORKDIR /go/src/app
+COPY . .
+
+# Static build required so that we can safely copy the binary over.
+RUN CGO_ENABLED=0 go build -o /go/bin/app -ldflags '-extldflags "-static"'
+
+FROM alpine:latest as alpine
+RUN apk --no-cache add tzdata zip ca-certificates
+WORKDIR /usr/share/zoneinfo
+# -0 means no compression.  Needed because go's
+# tz loader doesn't handle compressed data.
+RUN zip -r -0 /zoneinfo.zip .
+
+FROM scratch
+# the test program:
+COPY --from=golang /go/bin/app /app
+# the timezone data:
+ENV ZONEINFO /zoneinfo.zip
+COPY --from=alpine /zoneinfo.zip /
+# the tls certificates:
+COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+
+ENTRYPOINT ["/app"]

README.md

@@ -0,0 +1,25 @@
+# stappabot
+
+## Getting started
+
+Install stappabot
+
+```sh
+go get git.fromouter.space/Hamcha/stappabot
+```
+
+Set these env vars:
+
+```sh
+STAPPA_TOKEN=telegram-bot-token
+STAPPA_BIND=:5749
+STAPPA_WEBHOOK=https://telegram.webhook/endpoint
+STAPPA_PATH=endpoint
+STAPPA_MAXREQUEST=5
+```
+
+Run:
+
+```sh
+stappabot
+```

go.mod

@@ -0,0 +1,5 @@
+module git.fromouter.space/Hamcha/stappabot
+
+go 1.13
+
+require git.fromouter.space/hamcha/tg v0.0.4

go.sum

@@ -0,0 +1,2 @@
+git.fromouter.space/hamcha/tg v0.0.4 h1:rZyE7om501CTIaoHJ5Z9DutSVgMcWdQUqIc+LpFqrkc=
+git.fromouter.space/hamcha/tg v0.0.4/go.mod h1:63tLaopVQkIt7kotqIoYTGmV2Df+Mo4AOXSpk62qRLM=

main.go

@@ -1,8 +1,6 @@
 package main
 
 import (
-	"encoding/json"
-	"flag"
 	"fmt"
 	"os"
 	"strconv"
@@ -11,14 +9,6 @@ import (
 	"git.fromouter.space/hamcha/tg"
 )
 
-type Config struct {
-	Token                 string
-	Bind                  string
-	WebhookURL            string
-	WebhookPath           string
-	MaxRequestsPerMessage int
-}
-
 func checkErr(err error, msg string, args ...interface{}) {
 	if err != nil {
 		fmt.Printf("FATAL ERROR\n"+msg+":\n  ", args...)
@@ -28,28 +18,19 @@ func checkErr(err error, msg string, args ...interface{}) {
 }
 
 var api *tg.Telegram
-var cfg Config
+var MaxRequestsPerMessage int
 
 func main() {
-	cfgpath := flag.String("config", "stappa.conf", "Path to config file")
-	flag.Parse()
-
-	cfgfile, err := os.Open(*cfgpath)
-	checkErr(err, "Could not open config file")
-
-	err = json.NewDecoder(cfgfile).Decode(&cfg)
-	checkErr(err, "Could not decode JSON from config file contents")
-
-	cfgfile.Close()
+	MaxRequestsPerMessage, _ = strconv.Atoi(os.Getenv("STAPPA_MAXREQ"))
 
 	// Set default maxreq
-	if cfg.MaxRequestsPerMessage < 1 {
-		cfg.MaxRequestsPerMessage = 5
+	if MaxRequestsPerMessage < 1 {
+		MaxRequestsPerMessage = 5
 	}
 
-	api = tg.MakeAPIClient(cfg.Token)
-	api.SetWebhook(cfg.WebhookURL)
-	api.HandleWebhook(cfg.Bind, cfg.WebhookPath, webhook)
+	api = tg.MakeAPIClient(os.Getenv("STAPPA_TOKEN"))
+	api.SetWebhook(os.Getenv("STAPPA_WEBHOOK"))
+	api.HandleWebhook(os.Getenv("STAPPA_BIND"), os.Getenv("STAPPA_PATH"), webhook)
 }
 
 type CardFaceFlipPics struct {
@@ -109,10 +90,10 @@ func webhook(update tg.APIUpdate) {
 	// Check for card requests
 	if update.Message != nil && update.Message.Text != nil {
 		requests := getCardRequests(*update.Message.Text)
-		if len(requests) > cfg.MaxRequestsPerMessage {
+		if len(requests) > MaxRequestsPerMessage {
 			api.SendTextMessage(tg.ClientTextMessageData{
 				ChatID:  update.Message.Chat.ChatID,
-				Text:    fmt.Sprintf("You asked for way too many cards (%d!), please only ask me for at most %d cards in a single message.", len(requests), cfg.MaxRequestsPerMessage),
+				Text:    fmt.Sprintf("You asked for way too many cards (%d!), please only ask me for at most %d cards in a single message.", len(requests), MaxRequestsPerMessage),
 				ReplyID: &update.Message.MessageID,
 			})
 			return