temp(user/mw_create_redirect_day_month.sh):Save changes

diff --git a/user/mw_create_redirect_day_month.sh b/user/mw_create_redirect_day_month.sh
index 8d788c17aed4d928ee96e3921483e363144a5614..d801c4b5faa4831ad969e291dfdc38bc1d577474 100755 (executable)
--- a/user/mw_create_redirect_day_month.sh
+++ b/user/mw_create_redirect_day_month.sh
@@ -4,6 +4,7 @@
 # Input: arg1: year (string)
 # Output: none
 # Version: 0.1.0 (TODO: Support expanded year formats (i.e. ±YYYYYY-mm-dd)
+# Ref/Attrib: ISO 8601:2004. 4.1.2.4. “Expanded Representations”
 
 # Example: Running 'mw_create_redirect_day_month.sh 2022' creates
 #   directory 'wikicode' in working directory. It then populates it
@@ -25,7 +26,41 @@
 
 yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
 die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
-try() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
+list_days_of_year_exp() {
+    # Desc: Lists days of year in expanded ISO-8601 ±Y̲Y̲YYYY-mm-dd format
+    # Usage: script.sh [str year]
+    # Input: arg1: year (≥4 digit gregorian calendar year)
+    # Output: stdout: iso-8601 dates (newline delimited)
+    # Depends: bash (5.1.16), GNU Coreutils (8.32; date, printf)
+    # Version: 0.0.1
+    # Ref/Attrib: [1] Linux Bash: How to print leading zeroes on a variable https://bytefreaks.net/gnulinux/bash/linux-bash-how-to-print-leading-zeroes-on-a-variable
+    # Ref/Attrib: ISO 8601:2004. 4.1.2.4. “Expanded Representations”
+
+    # Check arg
+    ## Validate argument count
+    if [[ $# -ne 1 ]]; then die "FATAL:Invalid number of arguments:$#"; fi;
+    year="$1";
+
+    ## Validate arg as an integer year
+    pattern='^[0-9]{4,}$'; # !!!! STOPPED WORK HERE 2023-04-11T18:34+00
+    if [[ ! $year =~ $pattern ]]; then die "FATAL:Not a 4-digit year:$year"; fi;
+    if [[ ! $year -gt 1582 ]]; then die "FATAL:Not a gregorian calendar year:$year"; fi;
+
+    yyyy=$year;
+    for (( month = 1; month <= 12; month++ )); do
+        mm="$(printf %02d "$month")"; # two-digit month; See [1]
+        #yell "DEBUG:mm:$mm";        
+        for (( day = 1; day <= 31; day++ )); do
+            dd="$(printf %02d "$day")"; # two-digit day; See [1]
+            #yell "DEBUG:dd:$dd";            
+            date_iso8601="$yyyy-$mm-$dd";
+            if date --date="$date_iso8601" 1>/dev/random 2>&1; then
+                printf "%s\n" "$date_iso8601";
+            fi;
+        done;
+    done;
+}; # iso-8601 dates (yyyy-mm-dd) to stdout
 list_days_of_year() {
     # Desc: Lists days of year in ISO-8601 YYYY-mm-dd format
     # Usage: script.sh [str year]