[PIO-47] Remove engine manifest for stateless build

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.0-incubating
• Assignee: Chan
• Reporter: Chan
• Created: 01/Dec/16 07:20
• Updated: 04/Apr/17 16:58
• Resolved: 29/Jan/17 19:58

Description

As discussed in the dev mailing list, removing engine manifest would be the first step in improving the workflow towards a more modular design.

• Remove manifest.json completely. `pio build` will be stateless, and will not write anything to the database. This will make it easier to compile/build on PaaS platforms such as Heroku. Later, we can remove `pio build` command entirely, so that PIO is independent of the build tool (sbt).

• An immediate major disadvantage would be not being able to run pio commands outside of the engine directory. This can be resolved in the next step of creating a general metadata registry.

• Meanwhile, we can use engineFactory as engineId , and SHA-1 hash of engine filepath as engineVersion (as before). We can improve this when designing a metadata registry,

Issue Links

• links to: GitHub Pull Request #328