nested loops in macros, testbuttons macro, updated aliases

expand_nested_loops.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# Recursively read lines until EOF or a "loopend" is encountered.
+# Prints everything it reads, expanding any nested loops.
+expand() {
+  local line repeat body
+  # Read one line at a time
+  while IFS= read -r line; do
+    # If this is the start of a loop, grab the count
+    if [[ $line =~ ^[[:space:]]*loop[[:space:]]+([0-9]+)[[:space:]]*$ ]]; then
+      repeat=${BASH_REMATCH[1]}
+      # Recursively collect inner block into an array
+      mapfile -t body < <( expand )
+      # Print that block "repeat" times
+      for ((i=0; i<repeat; i++)); do
+        printf '%s\n' "${body[@]}"
+      done
+
+    # If this is the end of the current loop, return to caller
+    elif [[ $line =~ ^[[:space:]]*loopend[[:space:]]*$ ]]; then
+      return
+
+    # Otherwise, just print the line verbatim
+    else
+      printf '%s\n' "$line"
+    fi
+  done
+}
+
+# Kick it off: read from file if given, otherwise stdin
+expand < "${1:-/dev/stdin}"