Ability to have truffle migrate use a user defined configuration file.

[caleteeter]

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

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Issue

Truffle currently relies on truffle.js or truffle-config.js for the configuration elements that are used for compliation and migrations. Having a global configuration flag that would allow truffle to use user passed in configuration file path.

Steps to Reproduce

Expected Behavior

Addition of a global configuration flag such as this: truffle migrate --config</path/to/config>

Actual Results

Loading truffle configuration settings from user defined configuration files.

Environment

• Operating System: Windows
• Ethereum client: N/A
• Truffle version (truffle version): 5.0.8
• node version (node --version): 10.13.0
• npm version (npm --version): 6.9.0

[eggplantzzz]

@caleteeter Thanks for the suggestion, it seems like a good idea! We'll look into it.

[CruzMolina]

Requirements

1. Enable successful usage of a global configuration flag while calling truffle migrate.

Example:

truffle migrate --config /path/to/config

2. Throw a helpful Error if a truffle config is not found at the given path.
3. Add an integration test to verify proper behavior (i.e. when passed a valid config path, migration succeeds, when passed an invalid config path migration fails).

Prerequisite Context

• Familiarity with the current entry point for truffle migrate: https://github.com/trufflesuite/truffle/blob/develop/packages/truffle-core/lib/commands/migrate.js. The config flag should probably be handled before this line.
• Some familiarity with the Config class outlined in truffle-config might be helpful: https://github.com/trufflesuite/truffle/blob/develop/packages/truffle-config/index.js
• Familiarity with current truffle migrate integration tests, i.e. https://github.com/trufflesuite/truffle/blob/develop/packages/truffle/test/scenarios/happy_path/happypath.js, particularly these lines.

[eggplantzzz]

A feature resolving this was released a number of versions ago. Use the --config flag on the command line to specify a path to the Truffle config to be used.