Add documentation for the time zone configurations

Makefile

@@ -108,7 +108,7 @@ run-server-https: ${SERVER_CERT_FILE} ${SERVER_KEY_FILE}
 		go run . start-all
 
 # test runs all tests.
-test:
+test: build-bin
 	@echo "${COLOR_GREEN}Running tests...${COLOR_RESET}"
 	@GOBIN=${LOCAL_BIN_DIR} go install ${PKG_gotestsum}
 	@go clean -testcache

docs/source/config.rst

@@ -29,6 +29,7 @@ The following environment variables can be used to configure the Dagu. Default v
 - ``DAGU_WORK_DIR``: The working directory for DAGs. If not set, the default value is DAG location. Also you can set the working directory for each DAG steps in the DAG configuration file. For more information, see :ref:`specifying working dir`.
 - ``DAGU_CERT_FILE``: The path to the SSL certificate file.
 - ``DAGU_KEY_FILE`` : The path to the SSL key file.
+- ``DAGU_TZ`` (``""``): The timezone to use for the server. By default, the server will use the system's local timezone.
 
 Config File
 --------------
@@ -69,6 +70,9 @@ You can create ``admin.yaml`` file in ``$HOME/.config/dagu/`` to override the de
     tls:
         certFile: <path to SSL certificate file>
         keyFile: <path to SSL key file>
+
+    # Timezone Configuration
+    tz: <timezone>                                               # default: "" (e.g. "Asia/Tokyo")
 
 .. _Host and Port Configuration:
 

internal/config/config.go

@@ -23,38 +23,40 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/adrg/xdg"
 	"github.com/spf13/viper"
 )
 
 // Config represents the configuration for the server.
 type Config struct {
-	Host               string   // Server host
-	Port               int      // Server port
-	DAGs               string   // Location of DAG files
-	Executable         string   // Executable path
-	WorkDir            string   // Default working directory
-	IsBasicAuth        bool     // Enable basic auth
-	BasicAuthUsername  string   // Basic auth username
-	BasicAuthPassword  string   // Basic auth password
-	LogEncodingCharset string   // Log encoding charset
-	LogDir             string   // Log directory
-	DataDir            string   // Data directory
-	SuspendFlagsDir    string   // Suspend flags directory
-	AdminLogsDir       string   // Directory for admin logs
-	BaseConfig         string   // Common config file for all DAGs.
-	NavbarColor        string   // Navbar color for the web UI
-	NavbarTitle        string   // Navbar title for the web UI
-	Env                sync.Map // Store environment variables
-	TLS                *TLS     // TLS configuration
-	IsAuthToken        bool     // Enable auth token for API
-	AuthToken          string   // Auth token for API
-	LatestStatusToday  bool     // Show latest status today or the latest status
-	APIBaseURL         string   // Base URL for API
-	Debug              bool     // Enable debug mode (verbose logging)
-	LogFormat          string   // Log format
-	TimeZone           string   // The server time zone
+	Host               string         // Server host
+	Port               int            // Server port
+	DAGs               string         // Location of DAG files
+	Executable         string         // Executable path
+	WorkDir            string         // Default working directory
+	IsBasicAuth        bool           // Enable basic auth
+	BasicAuthUsername  string         // Basic auth username
+	BasicAuthPassword  string         // Basic auth password
+	LogEncodingCharset string         // Log encoding charset
+	LogDir             string         // Log directory
+	DataDir            string         // Data directory
+	SuspendFlagsDir    string         // Suspend flags directory
+	AdminLogsDir       string         // Directory for admin logs
+	BaseConfig         string         // Common config file for all DAGs.
+	NavbarColor        string         // Navbar color for the web UI
+	NavbarTitle        string         // Navbar title for the web UI
+	Env                sync.Map       // Store environment variables
+	TLS                *TLS           // TLS configuration
+	IsAuthToken        bool           // Enable auth token for API
+	AuthToken          string         // Auth token for API
+	LatestStatusToday  bool           // Show latest status today or the latest status
+	APIBaseURL         string         // Base URL for API
+	Debug              bool           // Enable debug mode (verbose logging)
+	LogFormat          string         // Log format
+	TZ                 string         // The server time zone
+	Location           *time.Location // The server location
 }
 
 type TLS struct {
@@ -98,6 +100,24 @@ func Load() (*Config, error) {
 		return true
 	})
 
+	if cfg.TZ != "" {
+		loc, err := time.LoadLocation(cfg.TZ)
+		if err != nil {
+			return nil, fmt.Errorf("failed to load timezone: %w", err)
+		}
+		cfg.Location = loc
+		os.Setenv("TZ", cfg.TZ)
+	} else {
+		// Load local timezone if not set.
+		_, offset := time.Now().Zone()
+		if offset == 0 {
+			cfg.TZ = "UTC"
+		} else {
+			cfg.TZ = fmt.Sprintf("UTC%+d", offset/3600)
+		}
+		cfg.Location = time.Local
+	}
+
 	return &cfg, nil
 }
 
@@ -179,7 +199,7 @@ func bindEnvs() {
 	_ = viper.BindEnv("navbarColor", "DAGU_NAVBAR_COLOR")
 	_ = viper.BindEnv("navbarTitle", "DAGU_NAVBAR_TITLE")
 	_ = viper.BindEnv("apiBaseURL", "DAGU_API_BASE_URL")
-	_ = viper.BindEnv("timeZone", "DAGU_TIME_ZONE")
+	_ = viper.BindEnv("tz", "DAGU_TZ")
 
 	// Basic authentication
 	_ = viper.BindEnv("isBasicAuth", "DAGU_IS_BASICAUTH")

internal/frontend/frontend.go

@@ -43,7 +43,7 @@ func New(cfg *config.Config, lg logger.Logger, cli client.Client) *server.Server
 		NavbarColor: cfg.NavbarColor,
 		NavbarTitle: cfg.NavbarTitle,
 		APIBaseURL:  cfg.APIBaseURL,
-		TimeZone:    cfg.TimeZone,
+		TimeZone:    cfg.TZ,
 	}
 
 	if cfg.IsAuthToken {

internal/frontend/server/server.go

@@ -93,7 +93,7 @@ func New(params NewServerArgs) *Server {
 			NavbarColor: params.NavbarColor,
 			NavbarTitle: params.NavbarTitle,
 			APIBaseURL:  params.APIBaseURL,
-			TimeZone:    params.TimeZone,
+			TZ:          params.TimeZone,
 		},
 	}
 }

internal/frontend/server/templates.go

@@ -57,7 +57,7 @@ type funcsConfig struct {
 	NavbarColor string
 	NavbarTitle string
 	APIBaseURL  string
-	TimeZone    string
+	TZ          string
 }
 
 func defaultFunctions(cfg funcsConfig) template.FuncMap {
@@ -81,8 +81,8 @@ func defaultFunctions(cfg funcsConfig) template.FuncMap {
 		"apiURL": func() string {
 			return cfg.APIBaseURL
 		},
-		"timeZone": func() string {
-			return cfg.TimeZone
+		"tz": func() string {
+			return cfg.TZ
 		},
 	}
 }

internal/frontend/templates/base.gohtml

@@ -1,26 +1,26 @@
 {{define "base"}}
 <!DOCTYPE html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>{{ navbarTitle }}</title>
-    <script>
-      function getConfig() {
-        return {
-          apiURL: "{{ apiURL }}",
-          title: "{{ navbarTitle }}",
-          navbarColor: "{{ navbarColor }}",
-          version: "{{ version }}",
-          timeZone: "{{ timeZone }}",
-        };
-      }
-    </script>
-    <script defer="defer" src="/assets/bundle.js?v={{ version }}"></script>
-  </head>
-  <body>
-    {{template "content" .}}
-  </body>
+    <head>
+        <meta charset="UTF-8" />
+        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <title>{{ navbarTitle }}</title>
+        <script>
+            function getConfig() {
+                return {
+                    apiURL: "{{ apiURL }}",
+                    title: "{{ navbarTitle }}",
+                    navbarColor: "{{ navbarColor }}",
+                    version: "{{ version }}",
+                    tz: "{{ tz }}",
+                };
+            }
+        </script>
+        <script defer="defer" src="/assets/bundle.js?v={{ version }}"></script>
+    </head>
+    <body>
+        {{template "content" .}}
+    </body>
 </html>
 {{ end }}

internal/scheduler/entryreader.go

@@ -42,25 +42,18 @@ type entryReaderImpl struct {
 	client     client.Client
 }
 
-type newEntryReaderArgs struct {
-	DagsDir    string
-	JobCreator jobCreator
-	Logger     logger.Logger
-	Client     client.Client
-}
-
 type jobCreator interface {
 	CreateJob(workflow *dag.DAG, next time.Time) job
 }
 
-func newEntryReader(args newEntryReaderArgs) *entryReaderImpl {
+func newEntryReader(dagsDir string, jobCreator jobCreator, logger logger.Logger, client client.Client) *entryReaderImpl {
 	er := &entryReaderImpl{
-		dagsDir:    args.DagsDir,
+		dagsDir:    dagsDir,
 		dagsLock:   sync.Mutex{},
 		dags:       map[string]*dag.DAG{},
-		jobCreator: args.JobCreator,
-		logger:     args.Logger,
-		client:     args.Client,
+		jobCreator: jobCreator,
+		logger:     logger,
+		client:     client,
 	}
 	if err := er.initDags(); err != nil {
 		er.logger.Error("DAG initialization failed", "error", err)

internal/scheduler/entryreader_test.go

@@ -40,23 +40,23 @@ func TestReadEntries(t *testing.T) {
 		}()
 
 		now := time.Date(2020, 1, 1, 1, 0, 0, 0, time.UTC).Add(-time.Second)
-		entryReader := newEntryReader(newEntryReaderArgs{
-			DagsDir:    filepath.Join(testdataDir, "invalid_directory"),
-			JobCreator: &mockJobFactory{},
-			Logger:     test.NewLogger(),
-			Client:     cli,
-		})
+		entryReader := newEntryReader(
+			filepath.Join(testdataDir, "invalid_directory"),
+			&mockJobFactory{},
+			test.NewLogger(),
+			cli,
+		)
 
 		entries, err := entryReader.Read(now)
 		require.NoError(t, err)
 		require.Len(t, entries, 0)
 
-		entryReader = newEntryReader(newEntryReaderArgs{
-			DagsDir:    testdataDir,
-			JobCreator: &mockJobFactory{},
-			Logger:     test.NewLogger(),
-			Client:     cli,
-		})
+		entryReader = newEntryReader(
+			testdataDir,
+			&mockJobFactory{},
+			test.NewLogger(),
+			cli,
+		)
 
 		done := make(chan any)
 		defer close(done)

internal/scheduler/scheduler.go

@@ -39,23 +39,17 @@ type Scheduler struct {
 	stop        chan struct{}
 	running     atomic.Bool
 	logger      logger.Logger
+	location    *time.Location
 }
 
-func New(cfg *config.Config, lg logger.Logger, cli client.Client) *Scheduler {
-	return newScheduler(newSchedulerArgs{
-		EntryReader: newEntryReader(newEntryReaderArgs{
-			Client:  cli,
-			DagsDir: cfg.DAGs,
-			JobCreator: &jobCreatorImpl{
-				WorkDir:    cfg.WorkDir,
-				Client:     cli,
-				Executable: cfg.Executable,
-			},
-			Logger: lg,
-		}),
-		Logger: lg,
-		LogDir: cfg.LogDir,
-	})
+func New(cfg *config.Config, logger logger.Logger, cli client.Client) *Scheduler {
+	jobCreator := &jobCreatorImpl{
+		WorkDir:    cfg.WorkDir,
+		Client:     cli,
+		Executable: cfg.Executable,
+	}
+	entryReader := newEntryReader(cfg.DAGs, jobCreator, logger, cli)
+	return newScheduler(entryReader, logger, cfg.LogDir, cfg.Location)
 }
 
 type entryReader interface {
@@ -123,18 +117,16 @@ func (e *entry) Invoke() error {
 	}
 }
 
-type newSchedulerArgs struct {
-	EntryReader entryReader
-	Logger      logger.Logger
-	LogDir      string
-}
-
-func newScheduler(args newSchedulerArgs) *Scheduler {
+func newScheduler(entryReader entryReader, logger logger.Logger, logDir string, location *time.Location) *Scheduler {
+	if location == nil {
+		location = time.Local
+	}
 	return &Scheduler{
-		entryReader: args.EntryReader,
-		logDir:      args.LogDir,
+		entryReader: entryReader,
+		logDir:      logDir,
 		stop:        make(chan struct{}),
-		logger:      args.Logger,
+		logger:      logger,
+		location:    location,
 	}
 }
 
@@ -188,7 +180,7 @@ func (s *Scheduler) start() {
 }
 
 func (s *Scheduler) run(now time.Time) {
-	entries, err := s.entryReader.Read(now.Add(-time.Second))
+	entries, err := s.entryReader.Read(now.Add(-time.Second).In(s.location))
 	if err != nil {
 		s.logger.Error("Scheduler failed to read workflow entries", "error", err)
 		return