Installer v7.6 robustness: resume preflight + safer extension failure flow

[nicdavidson]

Summary

• add Debian/Ubuntu package-manager health preflight before installer pipeline continues
• recover interrupted dpkg state by running dpkg --configure -a and apt-get -f install -y when dpkg --audit reports issues
• prevent hard process termination in Ubuntu PECL helper failures (install_mcrypt, install_mongodb) by returning non-zero instead of killing/exiting

Why

• rerun/resume should survive partial package-manager interruption instead of cascading into ambiguous failures
• helper functions should not kill the orchestrator unexpectedly during sourced execution paths

Validation

• bash -n installer.sh
• for f in installers/source/*.sh; do bash -n "$f"; done
• branch pushed and ready for review

Notes

• full VM matrix execution is still required for final sign-off (Ubuntu/Debian/RHEL-family happy path + induced failure + resume).

[nicdavidson]

Added follow-up hardening commit: \n\nWhat it fixes:\n- now kills the actual spinner PID () instead of \n- INT trap now safely kills spinner PID with stderr suppressed\n- command invocation uses quoted function name call ()\n\nExtra verification run:\n- \n- \n- focused runtime harness confirmed no orphan spinner child processes after success/failure paths ()\n\nRemaining for full sign-off: distro VM matrix (Ubuntu/Debian/RHEL families with induced failure + resume).

[nicdavidson]

Follow-up hardening commit pushed: 48f2779

What it fixes:

• run_process now kills the actual spinner PID ($BGPID) instead of kill $!
• INT trap now safely kills spinner PID with stderr suppressed
• command invocation uses quoted function name call ("$2")

Extra verification run:

• bash -n installer.sh
• for f in installers/source/*.sh; do bash -n "$f"; done
• focused runtime harness confirmed no orphan spinner child processes after success/failure paths (child_sleep_count=0)

Remaining for full sign-off: distro VM matrix (Ubuntu/Debian/RHEL families with induced failure + resume).