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CONTRIBUTING.md

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Contributing to Ledger Core library

You’ve decided to help us build an awesome piece of software, thank you for this. This document gathers important information you should read prior to starting working or even opening pull requests on the repository. Please open issues if you think some important material is missing from this same document.

Workflow

  • No one directly work on the central repository; we use forks.
  • We use gitflow.
    • The master branch only contains a set of curated and stable features.
    • The develop branch is the branch you should start your contribution from.
    • Everyone creates new feature branches in order to implement something. We don’t enforce the naming of the branch, but we highly recommend to use special prefix:
      • fix/: if your branch is about fixing a bug, a regression or anything that requires a patch to a bad behavior.
      • feature/: if your branch introduces a new concept or an enhancement.
      • misc/: for anything else (like adding docs, READMEs, etc.).
  • We open a pull request when we think the branch should be merged. Becareful: when opening the pull request, select develop as base branch!
  • Do not forget to update the CHANGELOG.md before opening a pull request.
  • We review the pull request. We don’t set a fixed number of reviewers, but don’t forget the golden rule: the more people review, the better.
  • If your change impacts no path from the CI (for instance, you just added a new tool or fixed a typo in documentation, even in code), please include the special [skip ci] in one or all commit(s) in your PR. This will help ease runners and ensure a better collaboration between developers.
  • When we have reviewed — and you have addressed everything — we shall merge your contribution into the develop branch. It’s possible that, given your contribution, we also ask you to update the version of the library.
  • Do not forget to bump the version, if needed, before opening a pull request
  • We tag stable releases on master with SemVer.
  • We tag instable releases on develop with the special -rc suffix to support release candidates.

Release process

  • Development: fixes, features are done on specific branches on developers' fork,
  • Pull requests: submitted to LedgerHQ/develop with updated CHANGELOG.md,
  • Merge into LedgerHQ/develop: triggers CI builds and deploys under x.y.z-rc-commitHash,
  • Merge into LedgerHQ/master: once a version is confirmed to be stable at least by one of our clients (Vault or Live), we bump project’s version, for this we have a special pull request. Once merged in LedgerHQ/master and tagged as a stable release x.y.z, a build and a deployment are triggered. To sum up, tags point to stable releases that are in production. These versions should be used by any application client of libcore
  • Patches: only applied on previously affected releases that has been in production, to apply a patch to a version x.y.z, we create a branch from master at x.y.z tag, push all fixes to it, once stable (confirmed by client) we tag a new patched stable release (e.g. x.y.(z+1)). Then this branch is merged to LedgerHQ/develop. Each 3/4 weeks we clean upstream from unused branches.

About coin integration

We might accept coin integration at some day but currently, we do not accept pull-requests that add new coin support. Also, we don’t want you to waste your time, so please contact us (open an issue, for instance) if you want to integrate a new coin. Thank you.