[event-participant] Add sorting and unique

diff --git a/event-participant b/event-participant
index aee33cb983fb5b4e1f5d37c5d9df3b98da2cb20d..a14e3aab6cd29067c0b17582064d94a2d4abf670 100755 (executable)
--- a/event-participant
+++ b/event-participant
@@ -29,7 +29,13 @@ participant="${BASH_REMATCH[2]}"
 [[ "$info" =~ (Date: )([^:]*) ]]
 date=$(date -I -d "${BASH_REMATCH[2]}")
 
-echo "${participant},${date}" | tee -a "$event"
+echo "${participant},${date}" |
+    cat "$event" - |
+    sort -t',' -k 2 -k 1 |
+    uniq |
+    grep -v "^$" \
+        > "$event.sorted"
+mv "$event.sorted" "$event"
 
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