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feat(freebsd): add support for freebsd #5102

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43 changes: 43 additions & 0 deletions coderd/util/tz/tz_freebsd.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,43 @@
//go:build freebsd

package tz

import (
"path/filepath"
"strings"
"time"

"golang.org/x/xerrors"
)

const etcLocaltime = "/etc/localtime"
const zoneInfoPath = "/usr/share/zoneinfo"

// TimezoneIANA attempts to determine the local timezone in IANA format.
// If the TZ environment variable is set, this is used.
// Otherwise, /etc/localtime is used to determine the timezone.
// Reference: https://stackoverflow.com/a/63805394
// On Windows platforms, instead of reading /etc/localtime, powershell
// is used instead to get the current time location in IANA format.
// Reference: https://superuser.com/a/1584968
func TimezoneIANA() (*time.Location, error) {
loc, err := locationFromEnv()
if err == nil {
return loc, nil
}
if !xerrors.Is(err, errNoEnvSet) {
return nil, xerrors.Errorf("lookup timezone from env: %w", err)
}

lp, err := filepath.EvalSymlinks(etcLocaltime)
if err != nil {
return nil, xerrors.Errorf("read location of %s: %w", etcLocaltime, err)
}
stripped := strings.Replace(lp, zoneInfoPath, "", -1)
stripped = strings.TrimPrefix(stripped, string(filepath.Separator))
loc, err = time.LoadLocation(stripped)
if err != nil {
return nil, xerrors.Errorf("invalid location %q guessed from %s: %w", stripped, lp, err)
}
return loc, nil
}