Truffle Compile re-downloads solc even after running Truffle Obtain

Issue

Truffle Compile re-downloads solc even after running Truffle Obtain. Do note that we use truffle to run truffle obtain.

But in our tests we use truffle-compile by itself (as in we did npm install truffle-compile and used it with require("truffle-compile")).

Steps to Reproduce

This is the .travis.yml used here:

language: node_js
node_js:
  - "node"
  - "--lts"
cache:
  yarn: true
  directories:
    - node_modules
before_script:
  - "truffle obtain --solc=0.5.2"

And this is the truffle-compile usage: https://github.com/trufflesuite/drizzle-utils/blob/master/packages/test-chain/compile.js#L3

Expected Behavior

Since truffle obtain is already run, it shouldn’t try to download the solidity compiler again.

Actual Results

Check out this build:

https://travis-ci.org/trufflesuite/drizzle-utils/jobs/508220795

Note that on line 468, it already downloaded the compiler. But on line 539 it tries to do it again. It’s able to fetch it in time for this build, but not in other builds.

[CruzMolina]

To recap, this issue directly relates to an older version of truffle-compile (maybe 4.0.0) that improperly cached solc and would attempt to re-download after using truffle obtain. This is now fixed on the latest version of truffle-compile, but there is another issue outlined in #1813 .

Keeping this open for now as a reminder, hoping to have the solution for #1813 merged and released in truffle-compile: 4.0.9 soon.

[adrianmcli]

Thanks, I’ll give it a shot!