add docker and config for fly.io

Dockerfile.daemon

@@ -0,0 +1,13 @@
+FROM golang:1.18-alpine
+
+WORKDIR /app
+
+COPY go.mod ./
+COPY go.sum ./
+RUN go mod download
+
+ADD . .
+
+RUN go build -o /gte-daemon ./cmd/daemon/service.go
+
+CMD ["/gte-daemon"]

cmd/cli/main.go

@@ -18,7 +18,7 @@ func main() {
 		fmt.Println(err, "could not open config file")
 		os.Exit(1)
 	}
-	config := configuration.New(configFile)
+	config := configuration.NewFromFile(configFile)
 
 	cmd, err := command.Parse(os.Args[1:], config)
 	if err != nil {

cmd/daemon/service.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"flag"
 	"os"
 	"os/signal"
 	"time"
@@ -18,21 +17,11 @@ import (
 func main() {
 	logger := log.New(os.Stdout)
 
-	configPath := flag.String("c", "~/.config/gte/gte.conf", "path to configuration file")
-	daysAhead := flag.Int("d", 6, "generate for this amount of days from now")
-	flag.Parse()
-
-	logger.With(log.Fields{
-		"config":    *configPath,
-		"daysAhead": *daysAhead,
-	}).Info("started")
-
-	configFile, err := os.Open(*configPath)
-	if err != nil {
-		logger.WithErr(err).Error("could not open config file")
-		os.Exit(1)
-	}
-	config := configuration.New(configFile)
+	config := configuration.NewFromEnvironment()
+	cfgCopy := *config
+	cfgCopy.IMAPPassword = "***"
+	cfgCopy.SMTPPassword = "***"
+	logger.WithField("config", cfgCopy).Info("started")
 
 	msgStore := mstore.NewIMAP(config.IMAP())
 	mailSend := msend.NewSSLSMTP(config.SMTP())
@@ -40,7 +29,7 @@ func main() {
 	disp := storage.NewDispatcher(mailSend)
 
 	inboxProc := process.NewInbox(repo)
-	recurProc := process.NewRecur(repo, disp, *daysAhead)
+	recurProc := process.NewRecur(repo, disp, config.DaysAhead)
 
 	go Run(inboxProc, recurProc, logger)
 

fly.toml

@@ -0,0 +1,22 @@
+# fly.toml file generated for gte-daemon on 2022-09-14T15:53:30+02:00
+
+app = "gte-daemon"
+kill_signal = "SIGINT"
+kill_timeout = 5
+processes = []
+
+[build]
+  dockerfile = "Dockerfile.daemon"
+
+[env]
+  IMAP_URL = "imap.fastmail.com:993"
+  IMAP_FOLDER_PREFIX = "GTE/"
+  SMTP_URL = "smtp.fastmail.com:465"
+  GTE_TO_NAME = "gte"
+  GTE_FROM_NAME = "gte"
+  GTE_DAYS_AHEAD = 6
+
+[experimental]
+  allowed_public_ports = []
+  auto_rollback = true
+

internal/configuration/configuration.go

@@ -4,6 +4,8 @@ import (
 	"bufio"
 	"errors"
 	"io"
+	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -33,13 +35,14 @@ type Configuration struct {
 	ToAddress string
 
 	LocalDBPath string
+	DaysAhead   int
 }
 
 type LocalConfiguration struct {
 	MinSyncInterval time.Duration
 }
 
-func New(src io.Reader) *Configuration {
+func NewFromFile(src io.Reader) *Configuration {
 	conf := &Configuration{}
 	scanner := bufio.NewScanner(src)
 	for scanner.Scan() {
@@ -81,6 +84,25 @@ func New(src io.Reader) *Configuration {
 	return conf
 }
 
+func NewFromEnvironment() *Configuration {
+	days, _ := strconv.Atoi(os.Getenv("GTE_DAYS_AHEAD"))
+
+	return &Configuration{
+		IMAPURL:          os.Getenv("IMAP_URL"),
+		IMAPUsername:     os.Getenv("IMAP_USER"),
+		IMAPPassword:     os.Getenv("IMAP_PASSWORD"),
+		IMAPFolderPrefix: os.Getenv("IMAP_FOLDER_PREFIX"),
+		SMTPURL:          os.Getenv("SMTP_URL"),
+		SMTPUsername:     os.Getenv("SMTP_USER"),
+		SMTPPassword:     os.Getenv("SMTP_PASSWORD"),
+		ToName:           os.Getenv("GTE_TO_NAME"),
+		ToAddress:        os.Getenv("GTE_TO_ADDRESS"),
+		FromName:         os.Getenv("GTE_FROM_NAME"),
+		FromAddress:      os.Getenv("GTE_FROM_ADDRESS"),
+		DaysAhead:        days,
+	}
+}
+
 func (c *Configuration) IMAP() *mstore.IMAPConfig {
 	return &mstore.IMAPConfig{
 		IMAPURL:          c.IMAPURL,

internal/configuration/configuration_test.go

@@ -78,7 +78,7 @@ func TestNew(t *testing.T) {
 		},
 	} {
 		t.Run(tc.name, func(t *testing.T) {
-			test.Equals(t, tc.exp, configuration.New(strings.NewReader(tc.source)))
+			test.Equals(t, tc.exp, configuration.NewFromFile(strings.NewReader(tc.source)))
 		})
 	}
 }