beats: import time/tzdata explicitly in main

In order to handle timezones we import Go's own timezone database. This
import is done indirectly by libbeat/common/cfgtype. We trust that this
package will end up being required by the dependency chain of every beats
main binary.

To ensure that the binaries continue to handle timezones correctly and to
avoid any unexpected issues, let's import time/tzdata explicitly in the
main packages.

See #40326.

auditbeat/main.go

@@ -19,6 +19,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/auditbeat/cmd"
 )

filebeat/main.go

@@ -19,6 +19,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/filebeat/cmd"
 	inputs "github.com/elastic/beats/v7/filebeat/input/default-inputs"

heartbeat/main.go

@@ -19,6 +19,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/heartbeat/cmd"
 

metricbeat/main.go

@@ -26,6 +26,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/metricbeat/cmd"
 )

packetbeat/main.go

@@ -19,6 +19,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/packetbeat/cmd"
 )

winlogbeat/main.go

@@ -26,6 +26,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/winlogbeat/cmd"
 )

x-pack/agentbeat/main.go

@@ -7,6 +7,7 @@ package main
 import (
 	"fmt"
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/libbeat/cfgfile"
 	"github.com/elastic/beats/v7/libbeat/cmd"

x-pack/auditbeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/auditbeat/cmd"
 )

x-pack/dockerlogbeat/main.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"os"
 	"strconv"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/docker/go-plugins-helpers/sdk"
 

x-pack/filebeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/filebeat/cmd"
 )

x-pack/functionbeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	_ "github.com/elastic/beats/v7/x-pack/functionbeat/include" // imports features
 	"github.com/elastic/beats/v7/x-pack/functionbeat/manager/cmd"

x-pack/heartbeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/heartbeat/cmd"
 )

x-pack/metricbeat/main.go

@@ -13,6 +13,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/metricbeat/cmd"
 )

x-pack/osquerybeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/osquerybeat/cmd"
 )

x-pack/packetbeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/packetbeat/cmd"
 )

x-pack/winlogbeat/main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"os"
+	_ "time/tzdata" // for timezone handling
 
 	"github.com/elastic/beats/v7/x-pack/winlogbeat/cmd"
 )