sane-deadlines: port from bash -> ysh

pkgs/by-name/sane-scripts/package.nix

@@ -82,7 +82,7 @@ let
       srcRoot = ./src;
       pkgs = [ "nix" ];
     };
-    deadlines = static-nix-shell.mkBash {
+    deadlines = static-nix-shell.mkYsh {
       pname = "sane-deadlines";
       srcRoot = ./src;
       pkgs = [ "coreutils-full" "gnused" ];

pkgs/by-name/sane-scripts/src/sane-deadlines

@@ -1,5 +1,5 @@
 #!/usr/bin/env nix-shell
-#!nix-shell -i bash -p bash -p coreutils-full -p gnused
+#!nix-shell -i ysh -p coreutils-full -p gnused -p oils-for-unix
 
 # processes a tab-separated "deadlines" file and alerts for any upcoming events.
 #
@@ -17,29 +17,31 @@
 # 2023-04-01	7d	the other pie day :o
 
 # configurables:
-deadlines=~/knowledge/planner/deadlines.tsv
+var deadlines = "$[ENV.HOME]/knowledge/planner/deadlines.tsv"
 
-if ! test -f "$deadlines"; then
-        echo "WARNING: $deadlines sane-deadlines file not found"
-        exit 1
-fi
+if ! test -f "$deadlines" {
+  echo "WARNING: $deadlines sane-deadlines file not found"
+  exit 1
+}
 
-now=$(date +%s)
-sort "$deadlines" | while read line; do
-        # parse line
-        deadline_field=$(echo "$line" | cut -f 1)
-        threshold_field=$(echo "$line" | cut -f 2)
-        description_field=$(echo "$line" | cut -f 3)
+var now=$(date +%s)
+for line in ($(cat "$deadlines") => split(u'\n')) {
+  # parse line
+  var deadline_field=$(echo "$line" | cut -f 1)
+  var threshold_field=$(echo "$line" | cut -f 2)
+  var description_field=$(echo "$line" | cut -f 3)
 
-        # normalize dates into seconds since unix epoch
-        deadline=$(date -d "$deadline_field" +%s)
-        threshold=$(echo "$threshold_field" | sed 's/d/day /g')
-        birthtime=$(date -d "$deadline_field - $threshold" +%s)
+  # normalize dates into seconds since unix epoch
+  var deadline=$(date -d "$deadline_field" +%s)
+  var threshold=$(echo "$threshold_field" | sed 's/d/day /g')
+  var birthtime=$(date -d "$deadline_field - $threshold" +%s)
 
-        # show the event iff it's near
-        # 86400 = 24*60*60 = # of seconds in a day
-        if test "$now" -ge "$birthtime"; then
-                days_until=$(( ($deadline - $now + 86399) / 86400 ))
-                echo "in $days_until day(s): $description_field"
-        fi
-done
+  # show the event iff it's near
+  # 86400 = 24*60*60 = # of seconds in a day
+  # 10080 = 24*60*7 = # of seconds between UTC and UTC-7
+  # 11520 = 24*60*8 = # of seconds between UTC and UTC-8
+  if (now >= birthtime) {
+    var days_until = int((deadline - now + 86399) / 86400)
+    echo "in $days_until day(s): $description_field"
+  }
+}