shack is-plenum: initial commit

1 files changed, 34 insertions, 0 deletions

diff --git a/shack/bin/is-plenum b/shack/bin/is-plenum
new file mode 100755
index 00000000..1c686ca1
--- /dev/null
+++ b/shack/bin/is-plenum
@@ -0,0 +1,34 @@
+#! /bin/sh
+#
+# //shack/is-plenum [YEAR]
+#
+# where YEAR defaults to the current year
+#
+
+y=${1-`date +%Y`}
+for m in `seq 1 12`; do
+  t1=
+  t2=
+  t3=
+  t4=
+  t5=
+  week_done=-1
+  for d in `cal $m $y | tr ' ' '\n' | grep '^[0-9][0-9]\?$'`; do
+    echo $m | grep -q '^.$' && m=0$m
+    echo $d | grep -q '^.$' && d=0$d
+    date=$y-$m-$d
+    date_week=`date -d $date +%W`
+    if test $week_done -lt $date_week; then
+      test -z "$t1" && { test `date -d $date +%u` = 4 && t1=$date && week_done=$date_week; continue; }
+      test -z "$t2" && { test `date -d $date +%u` = 3 && t2=$date && week_done=$date_week; continue; }
+      test -z "$t3" && { test `date -d $date +%u` = 4 && t3=$date && week_done=$date_week; continue; }
+      test -z "$t4" && { test `date -d $date +%u` = 3 && t4=$date && week_done=$date_week; continue; }
+      test -z "$t5" && { test `date -d $date +%u` = 3 && t5=$date && week_done=$date_week; continue; }
+    fi
+  done
+  test -n "${t1}" && echo $t1
+  test -n "${t2}" && echo $t2
+  test -n "${t3}" && echo $t3
+  test -n "${t4}" && echo $t4
+  test -n "${t5}" && echo $t5
+done