fix(user/bkdatev):Fix --date='' functionality for right/UTC

[BK-2020-03.git] / user / bkdatev

diff --git a/user/bkdatev b/user/bkdatev
index 808ab9e144ba832dfb50fbbc621f8fc93d2e5ef2..fb0b96c2588d98aafbcdc7ec66eec25962e01454 100755 (executable)
--- a/user/bkdatev
+++ b/user/bkdatev
@@ -2,12 +2,12 @@
 # Desc: Baltakatei's verbose date command
 # Usage: bkdatev [args]
 # Example: bkdatev --date="2001-09-11T09:02:59-04"
-# Version: 1.0.1
-# Depends: GNU Coreutils 8.32, Bash 3.2.57
+# Version: 1.0.4
+# Depends: GNU Coreutils 8.32, Bash 3.2.57, tzdata-legacy
 # Ref/Attrib: [1] "ISO 8601". Wikipedia. https://en.wikipedia.org/wiki/ISO_8601
 #             [2] "Changing the Locale in Wine" https://stackoverflow.com/a/16428951
 #             [3] "Shanghai vs Beijing" https://bugs.launchpad.net/ubuntu/+source/libgweather/+bug/228554
-#             [4] “"right" tz database (zoneinfo) files and GPS-based NTP” https://www.ucolick.org/~sla/leapsecs/right+gps.html
+#             [4] “Understanding the "right" time zone database” https://kenta.blogspot.com/2016/03/sqfzcxay-understanding-right-time-zone.html
 # Notes:  * Check `ls -R /usr/share/zoneinfo` for time zone names.
 #         * Check `cat /usr/share/i18n/SUPPORTED` for supported locales.
 #         * For list of valid locales, see: https://manpages.ubuntu.com/manpages/bionic/man3/DateTime::Locale::Catalog.3pm.html
@@ -144,9 +144,16 @@ main() {
 
     # UTC (pop. (2021): 7,837,000,000)
     (
-        export TZ=right/UTC; # See [4]
+        export TZ=UTC;
         id="UTC";
-        fs_3="+%s seconds since 1970-01-01T00:00+00";
+        path_right_tz="/usr/share/zoneinfo/right/UTC";
+        if [[ -f "$path_right_tz" ]]; then
+            date_string="$(date -Is "$@"; )";
+            right_epoch="$(TZ=right/UTC date --date="$date_string" +%s;)"; # see [4]
+            fs_3="+%s POSIX seconds (${right_epoch} real) since 1970-01-01T00:00+00";
+        else
+            fs_3="+%s POSIX seconds since 1970-01-01T00:00+00";
+        fi;
         print_dateline "$@";
     ); line_sep;