doc(user/bkdatev):Add comment warning about macOS compatibility

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

diff --git a/user/bkdatev b/user/bkdatev
old mode 100755 (executable)
new mode 100644 (file)
index f2f92ec..1b80477
--- a/user/bkdatev
+++ b/user/bkdatev
@@ -2,7 +2,8 @@
 # Desc: Baltakatei's verbose date command
 # Usage: bkdatev [args]
 # Example: bkdatev --date="2001-09-11T09:02:59-04"
-# Version: 0.3.0
+# Version: 0.3.2
+# Depends: GNU Coreutils 8.32, Bash 3.2.57
 # 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
@@ -11,6 +12,9 @@
 #         * For list of valid locales, see: https://manpages.ubuntu.com/manpages/bionic/man3/DateTime::Locale::Catalog.3pm.html
 #         * Locations chosen for population, personal signifiance, and spatial coverage.
 #         * For International Atomic Time (TAI), use offsets from UTC provided in `/usr/share/zoneinfo/leap-seconds.list`.
+#         * Compatibility with macOS may be limited if any arguments
+#             are provided when running `bkdatev`; e.g. passing a
+#             `--date` option to `bkdatev` will fail.
 
 yell() { echo "$0: $*" >&2; }
 die() { yell "$*"; exit 111; }
@@ -83,7 +87,9 @@ get_tz_offset() {
     #last2="$(rev <<< $ntz)" && last2="${last2:0:2}" && last2="$(rev <<< "$last2")";
     if [[ "$last2" == "00" ]]; then
         ## ntz_out is truncated by 2 characters
-        ntz_out="${ntz:0:-2}";
+       len_ntz="${#ntz}";
+       len_ntz_out="$(( len_ntz - 2 ))";
+       ntz_out=""${ntz:0:$len_ntz_out};
     else
         ## ntz_out is ntz with semicolon inserted after HH
         ntz_out="$(insertStr "$ntz" 3 ":" )";