Enhanced build system

Description

Onionspray needs a stateful update mechanism.

This would allow for better build and upgrade procedures.

In special, it makes easier to achieve idempotency for configuration management such as Onionspray Ansible Role.

Tasks

• Build procedure:
  • Keep per platform build info in files (!114 (merged)).
  • Keep per dependency build info files (Tor and OpenResty).
  • Try to determine platform automatically (!119 (merged)).
  • Implement simpler build commands: ./onionspray <build|deps|compile> (!119 (merged)).
  • Don't build if already built (but accept --force). Onionspray should only build if platform or dependency versions changed (!116 (merged)).
  • Reflect the updates in Onionspray Ansible Role (tpo/onion-services/ansible/onionspray-role#1 (closed)).
• Upgrade procedure:
  • Implement a simpler upgrade procedure: ./onionspray <update|upgrade> (!119 (merged)).
  • Optionally add a command to list available binaries/versions (Tor and NGINX). This is already done by ./onionspray version.
  • Optionally implement a command to check if binaries are already on their latest versions (!120 (merged)).
  • Reflect the updates in Onionspray Ansible Role (tpo/onion-services/ansible/onionspray-role#1 (closed)).
• Documentation:
  • Update the tutorial.
  • Update the install documentation.
  • Update the upgrade documentation.

Time estimation

• Complexity: small (1 day)
• Uncertainty: low (x1.1)
• Reference (adapted)