73 lines
3.1 KiB
Markdown
73 lines
3.1 KiB
Markdown
# Description
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This folder contains configuration for [Nix](https://nixos.org/), a purely functional package manager used by the Status app for its build process.
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## Configuration
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The main config file is [`nix/nix.conf`](/nix/nix.conf) and its main purpose is defining the [binary caches](https://nixos.org/nix/manual/#ch-basic-package-mgmt) which allow download of packages to avoid having to compile them yourself locally.
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## Build arguments
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We leverage the `config` argument of standard `nixpkgs` for our own parameterization of the builds (e.g. to pass a build number or build type).
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Here is a sample structure of the `config` attribute set:
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```nix
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{
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status-im = {
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build-type = "pr"; # Build type (influences which .env file gets used for feature flags)
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build-number = 9999; # Used for versionCode and CFBundleVersion in Android and iOS respectively
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android = {
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gradle-opts = ""; # Gradle options passed for Android builds
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abi-split = false; # If APKs should be split based on architectures
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abi-include = "x86"; # Android architectures to build for
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};
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status-go = {
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src-override = "$HOME/my/source/status-go"; # local source override
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};
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};
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}
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```
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You can see the defaults in [`nix/config.nix`](./config.nix).
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## Shell
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In order to access an interactive Nix shell a user should run `make shell`.
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The Nix shell is started in this repo via the [`nix/scripts/shell.sh`](/nix/scripts/shell.sh) script, which is a wrapper around the `nix-shell` command and is intended for use with our main [`Makefile`](/Makefile). This allows for an implicit use of `nix-shell` as the default shell in the `Makefile`.
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Normally the shell starts without any specific target platform, if you want to change that you should export the `TARGET` env variable with appropriate value:
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```bash
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make shell TARGET=android
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```
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This way your shell and all other nix commands should run in a setup that is tailored towards Android development.
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For valid values you can check the [`nix/shells.nix`](/nix/shells.nix) file.
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:warning: __WARNING__: To have Nix pick up all changes a new `nix-shell` needs to be spawned.
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## Using a local status-go repository
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If you need to use a locally checked-out status-go repository, you can achieve that by defining the `STATUS_GO_SRC_OVERRIDE`
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environment variable:
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```sh
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export STATUS_GO_SRC_OVERRIDE=$GOPATH/src/github.com/status-im/status-go
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make release-android
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```
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## Resources
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You can learn more about Nix by watching these presentations:
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* [Nix Fundamentals](https://www.youtube.com/watch?v=m4sv2M9jRLg) ([PDF](https://drive.google.com/file/d/1Tt5R7QOubudGiSuZIGxuFWB1OYgcThcL/view?usp=sharing), [src](https://github.com/status-im/infra-docs/tree/master/presentations/nix_basics))
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* [Nix in Status](https://www.youtube.com/watch?v=rEQ1EvRG8Wc) ([PDF](https://drive.google.com/file/d/1Ti0wppMoj40icCPdHy7mJcQj__DeaYBE/view?usp=sharing), [src](https://github.com/status-im/infra-docs/tree/master/presentations/nix_in_status))
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And you can read [`nix/DETAILS.md`](./DETAILS.md) for more information.
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## Known Issues
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See [`KNOWN_ISSUES.md`](./KNOWN_ISSUES.md).
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