p.sh rewrite

scripts/oneline.sh

@@ -0,0 +1,17 @@
+oneline() {
+    # Print a command's output as a single line only.
+    # Example usage: for f in 'first line' 'second line' '3rd line'; do echo "$f"; sleep 1; done | oneline
+    local ws
+    while IFS= read -r line; do
+        if ((${#line} >= $COLUMNS)); then
+            # Moving cursor back to the front of the line so user input doesn't force wrapping
+            printf '\r%s\r' "${line:0:$COLUMNS}"
+        else
+            ws=$(($COLUMNS - ${#line}))
+            # by writing each line twice, we move the cursor back to position
+            # thus: LF, content, whitespace, LF, content
+            printf '\r%s%*s\r%s' "$line" "$ws" " " "$line"
+        fi
+    done
+    echo
+}