with-managed-process.sh fails on bash 3.2 (macOS system bash) due to negative array index

[azuresurf]

Summary

scripts/with-managed-process.sh uses negative array subscripts (${START_ARGS[-1]}), which require bash 4.3+. On macOS, the system bash is permanently stuck at 3.2.57 (Apple ships GPLv2 bash only), so the wrapper fails out of the box for macOS users who don't have a Homebrew bash on PATH.

Environment

• macOS (Apple Silicon), /bin/bash = GNU bash 3.2.57(1)-release
• commit: 98bd7f3

Repro

./scripts/with-managed-process.sh --name web \
  --command 'python3 -m http.server 18924 --bind 127.0.0.1' \
  --port 18924 --timeout 30 -- 'curl -fsS http://127.0.0.1:18924'

Result:

with-managed-process.sh: line 31: START_ARGS: bad array subscript

Root cause

Lines 31–32 reference the just-pushed element via ${START_ARGS[-1]}. Negative indexing is unsupported before bash 4.3.

Suggested fix (bash 3.2 compatible)

Capture the pushed value before shift instead of indexing from the end:

  START_ARGS+=("$1")
  LAST_ARG="$1"
  shift
  if [ "$#" -gt 0 ] && [ "$LAST_ARG" != "--help" ]; then
    case "$LAST_ARG" in

This is semantically identical and works on bash 3.2+.

Secondary note

The scripts/*.sh files ship without the execute bit (mode 0644), so invoking them by path gives permission denied until chmod +x is run. Consider committing them as executable.