| Updated 31.01.2023 | Languages: EN, FR, CZ, PL |

Contributing guide

Compiling with SQLCipher encryption enabled

Add cabal.project.local to project root with the location of OpenSSL headers and libraries and flag setting encryption mode:

cp scripts/cabal.project.local.mac cabal.project.local
# or
# cp scripts/cabal.project.local.linux cabal.project.local

OpenSSL on MacOS

MacOS comes with LibreSSL as default, OpenSSL must be installed to compile SimpleX from source.

OpenSSL can be installed with brew install openssl@1.1

You will have to add /opt/homebrew/opt/openssl@1.1/bin to your PATH in order to have things working properly

Project branches

In simplex-chat repo

stable - stable release of the apps, can be used for updates to the previous stable release (GHC 9.6.3).
stable-android - used to build stable Android core library with Nix (GHC 8.10.7) - only for Android armv7a.
stable-ios - used to build stable iOS core library with Nix (GHC 8.10.7) – this branch should be the same as stable-android except Nix configuration files. Deprecated.
master - branch for beta version releases (GHC 9.6.3).
master-ghc8107 - branch for beta version releases (GHC 8.10.7). Deprecated.
master-android - used to build beta Android core library with Nix (GHC 8.10.7) - only for Android armv7a.
master-ios - used to build beta iOS core library with Nix (GHC 8.10.7). Deprecated.
windows-ghc8107 - branch for windows core library build (GHC 8.10.7). Deprecated?

master-ios and windows-ghc8107 branches should be the same as master-ghc8107 except Nix configuration files.

In simplexmq repo

master - uses GHC 9.6.3 its commit should be used in master branch of simplex-chat repo.
master-ghc8107 - its commit should be used in master-android (and master-ios) branch of simplex-chat repo. Deprecated.

Development & release process

Make PRs to master branch only for both simplex-chat and simplexmq repos.
If simplexmq repo was changed, to build mobile core libraries you need to merge its master branch into master-ghc8107 branch.
To build core libraries for Android, iOS and windows:

merge master branch to master-android branch.
update code to be compatible with GHC 8.10.7 (see below).
push to GitHub.

All libraries should be built from master branch, Android armv7a - from master-android branch.
To build Desktop and CLI apps, make tag in master branch, APK files should be attached to the release.
After the public release to App Store and Play Store, merge:

master to stable
master to master-android (and compile/update code)
master-android to stable-android

Independently, master branch of simplexmq repo should be merged to stable branch on stable releases.

Differences between GHC 8.10.7 and GHC 9.6.3

The main difference is related to DuplicateRecordFields extension.

It is no longer possible in GHC 9.6.3 to specify type when using selectors, instead OverloadedRecordDot extension and syntax are used that need to be removed in GHC 8.10.7:

{-# LANGUAGE DuplicateRecordFields #-}
-- use this in GHC 9.6.3 when needed
{-# LANGUAGE OverloadedRecordDot #-}

-- GHC 9.6.3 syntax
let x = record.field

-- GHC 8.10.7 syntax removed in GHC 9.6.3
let x = field (record :: Record)

It is still possible to specify type when using record update syntax, use this pragma to suppress compiler warning:

-- use this in GHC 9.6.3 when needed
{-# OPTIONS_GHC -fno-warn-ambiguous-fields #-}

let r' = (record :: Record) {field = value}

Most monad functions now have to be imported from Control.Monad, and not from specific monad modules (e.g. Control.Monad.Except).

-- use this in GHC 9.6.3 when needed
import Control.Monad

This PR has all the differences.