Truffle: Cannot compile vyper

[acheron2302]

• [x] I've asked for help in the Truffle Gitter before filing this issue.

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Issue

Error cannot compile vyper contract

Steps to Reproduce

Compile vyper contract with truffle on vyper-example box with truffle version 5.1.7

Actual Results

KeyError: '/home//project/vyper_ERC20/contracts/ERC20.vy'

Compilation of /home//project/vyper_ERC20/contracts/ERC20.vy failed. See above.

Environment

• Operating System: Linux parrot 5.4.0-1parrot1-amd64 #1 SMP Parrot 5.4.6-1parrot1 (2019-12-30) x86_64 GNU/Linux
• Ethereum client: Ganache CLI v6.8.1 (ganache-core: 2.9.1)
• Truffle version (truffle version):
  Truffle v5.1.7 (core: 5.1.7)
  Solidity v0.5.12 (solc-js)
  Node v10.17.0
  Web3.js v1.2.1
• node version (node --version): v10.17.0
• npm version (npm --version): 6.13.4

[fainashalts]

Hi @acheron2302, thanks for bringing this up! What version of Vyper are you using?

[acheron2302]

@fainashalts i am currently using vyper version: 0.1.0b14+commit.4ac5ef5. And i’m running it in a virtual env

[CruzMolina]

Hey @acheron2302 , vyperlang/vyper#1828 appears to be related.

I'm not sure about the exact commit, but downgrading to exactly 0.1.0b14 seems to resolve the issue (at least in our CI).

[fubuloubu]

We're working on a fix for this! Our apologies!

[fubuloubu]

Fixed in: https://github.com/vyperlang/vyper/pull/1829

Release incoming!

[fubuloubu]

b16 has been released. please try again with the new version, this issue should be fixed

[acheron2302]

fixed with vyper version: 0.1.0b16+commit.5e4a94a