Use configured timeZone for the clock

And some other related adjustments.

Updates #8787

commands/commandeer.go

@@ -98,13 +98,12 @@ type commandeer struct {
 
 	serverPorts []serverPortListener
 
-	languagesConfigured bool
-	languages           langs.Languages
-	doLiveReload        bool
-	renderStaticToDisk  bool
-	fastRenderMode      bool
-	showErrorInBrowser  bool
-	wasError            bool
+	languages          langs.Languages
+	doLiveReload       bool
+	renderStaticToDisk bool
+	fastRenderMode     bool
+	showErrorInBrowser bool
+	wasError           bool
 
 	configured bool
 	paused     bool
@@ -168,16 +167,17 @@ func (c *commandeer) initFs(fs *hugofs.Fs) error {
 	return nil
 }
 
-func (c *commandeer) initClock() error {
+func (c *commandeer) initClock(loc *time.Location) error {
 	bt := c.Cfg.GetString("clock")
 	if bt == "" {
 		return nil
 	}
 
-	t, err := cast.StringToDateInDefaultLocation(bt, nil)
+	t, err := cast.StringToDateInDefaultLocation(bt, loc)
 	if err != nil {
 		return fmt.Errorf(`failed to parse "clock" flag: %s`, err)
 	}
+
 	htime.Clock = clock.Start(t)
 	return nil
 }
@@ -359,14 +359,15 @@ func (c *commandeer) loadConfig() error {
 
 	c.configFiles = configFiles
 
-	err = c.initClock()
-	if err != nil {
-		return err
+	var ok bool
+	c.languages, ok = c.Cfg.Get("languagesSorted").(langs.Languages)
+	if !ok {
+		panic("languages not configured")
 	}
 
-	if l, ok := c.Cfg.Get("languagesSorted").(langs.Languages); ok {
-		c.languagesConfigured = true
-		c.languages = l
+	err = c.initClock(langs.GetLocation(c.languages[0]))
+	if err != nil {
+		return err
 	}
 
 	// Set some commonly used flags

commands/commands.go

@@ -281,7 +281,7 @@ func (cc *hugoBuilderCommon) handleCommonBuilderFlags(cmd *cobra.Command) {
 	cmd.PersistentFlags().StringVarP(&cc.environment, "environment", "e", "", "build environment")
 	cmd.PersistentFlags().StringP("themesDir", "", "", "filesystem path to themes directory")
 	cmd.PersistentFlags().StringP("ignoreVendorPaths", "", "", "ignores any _vendor for module paths matching the given Glob pattern")
-	cmd.PersistentFlags().StringVar(&cc.clock, "clock", "", "set clock inside hugo, e.g. --clock 2021-11-06T22:30:00.00+09:00")
+	cmd.PersistentFlags().StringVar(&cc.clock, "clock", "", "set the clock used by Hugo, e.g. --clock 2021-11-06T22:30:00.00+09:00")
 }
 
 func (cc *hugoBuilderCommon) handleFlags(cmd *cobra.Command) {

commands/hugo_test.go

@@ -21,7 +21,9 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/bep/clock"
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/htime"
 	"github.com/gohugoio/hugo/hugofs"
 	"github.com/spf13/afero"
 	"golang.org/x/tools/txtar"
@@ -29,6 +31,7 @@ import (
 
 // Issue #5662
 func TestHugoWithContentDirOverride(t *testing.T) {
+	t.Parallel()
 	c := qt.New(t)
 
 	files := `
@@ -50,6 +53,7 @@ Page: {{ .Title }}|
 
 // Issue #9794
 func TestHugoStaticFilesMultipleStaticAndManyFolders(t *testing.T) {
+	t.Parallel()
 	c := qt.New(t)
 
 	files := `
@@ -95,12 +99,15 @@ Home.
 
 // Issue #8787
 func TestHugoListCommandsWithClockFlag(t *testing.T) {
+	t.Cleanup(func() { htime.Clock = clock.System() })
+
 	c := qt.New(t)
 
 	files := `
 -- config.toml --
 baseURL = "https://example.org"
 title = "Hugo Commands"
+timeZone = "UTC"
 -- content/past.md --
 ---
 title: "Past"
@@ -115,7 +122,9 @@ date: 2200-11-06
 Page: {{ .Title }}|
 
 `
-	s := newTestHugoCmdBuilder(c, files, []string{"list", "future"}).Build()
+	s := newTestHugoCmdBuilder(c, files, []string{"list", "future"})
+	s.captureOut = true
+	s.Build()
 	p := filepath.Join("content", "future.md")
 	s.AssertStdout(p + ",2200-11-06T00:00:00Z")
 
@@ -130,7 +139,9 @@ type testHugoCmdBuilder struct {
 	dir   string
 	files string
 	args  []string
-	out   string
+
+	captureOut bool
+	out        string
 }
 
 func newTestHugoCmdBuilder(c *qt.C, files string, args []string) *testHugoCmdBuilder {
@@ -156,12 +167,17 @@ func (s *testHugoCmdBuilder) Build() *testHugoCmdBuilder {
 	args := append(s.args, "-s="+s.dir, "--quiet")
 	cmd.SetArgs(args)
 
-	out, err := captureStdout(func() error {
+	if s.captureOut {
+		out, err := captureStdout(func() error {
+			_, err := cmd.ExecuteC()
+			return err
+		})
+		s.Assert(err, qt.IsNil)
+		s.out = out
+	} else {
 		_, err := cmd.ExecuteC()
-		return err
-	})
-	s.Assert(err, qt.IsNil)
-	s.out = out
+		s.Assert(err, qt.IsNil)
+	}
 
 	return s
 }

commands/server.go

@@ -166,11 +166,6 @@ func (sc *serverCmd) server(cmd *cobra.Command, args []string) error {
 			c.Set("watch", true)
 		}
 
-		// TODO(bep) yes, we should fix.
-		if !c.languagesConfigured {
-			return nil
-		}
-
 		// We can only do this once.
 		serverCfgInit.Do(func() {
 			c.serverPorts = make([]serverPortListener, 1)