### Enter Nix Development Shell

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Use 'nix develop' to enter the default development shell, or 'nix develop .#<shell-name>' to enter a specific shell like one for GHC 8.10.7.

```bash
use `nix develop` or `nix develop .#ghc8107` to enter a development shell.
```

--------------------------------

### Allow Direnv Environment

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Use this command to allow the direnv environment after setting up direnv. It enables the project's development environment configurations.

```bash
direnv allow
```

--------------------------------

### Run Tests with Std

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Run the tests for a specific application, such as 'prelude-tests', using the 'std' command. This command executes tests defined within the Nix build system.

```bash
std //prelude/apps/cardano-prelude-test:test:prelude-tests:run
```

--------------------------------

### List Available Devshells with Std

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Check available alternative compiler configurations using the 'std list' command. This helps in selecting a specific GHC version for development.

```bash
$ std list | grep -Eo '//_automation/devshells/.*:enter'
```

--------------------------------

### Build CI Dependencies with Std

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

If 'tullia run ci' does not work for local execution, use 'std' to build the required Nix job for CI. This is a fallback method for running CI-related builds.

```bash
std //_automation/ciJobs/required:build
```

--------------------------------

### Build All Packages with Cabal

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Update the cabal package index and then build all project packages using the 'cabal build all' command. This is a standard workflow for building the project with cabal.

```bash
cabal update
cabal build all
```

--------------------------------

### Build Package with Std

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Build a specific Haskell package, such as 'cardano-prelude', using the 'std' command. This command leverages Nix for building Haskell projects.

```bash
source <(std _carapace) # (Optional, for completion on zsh).
std //prelude/packages/cardano-prelude:lib:cardano-prelude:build
```

--------------------------------

### Run CI Jobs Locally with Tullia

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Execute the project's Continuous Integration (CI) jobs locally using the 'tullia run ci' command. This helps in verifying CI configurations before pushing changes.

```bash
tullia run ci
```

--------------------------------

### Test All Packages with Cabal

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Execute all project tests using the 'cabal test all' command. This is part of the standard testing workflow when using cabal.

```bash
cabal test all
```

--------------------------------

### Enter Alternative Devshell with Std

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Enter a specific development shell, such as one configured for GHC 8.10.7, using the 'std' command. This allows for development with different compiler versions.

```bash
$ std //_automation/devshells/ghc8107:enter
```

--------------------------------

### Set Alternative Compiler Permanently

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Configure the development environment to permanently use an alternative compiler by setting the DEVSHELL_TARGET in the .envrc.local file. This ensures the chosen compiler is used on subsequent environment loads.

```bash
echo DEVSHELL_TARGET=ghc8107 >> .envrc.local
direnv reload
```

--------------------------------

### Update Nix Hackage Pin

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Update the Nix input for Hackage to fetch the latest package index state. This is necessary when updating the 'index-state' in 'cabal.project'.

```bash
nix flake lock --update-input hackage
```

--------------------------------

### Evaluate Last Index State

Source: https://github.com/intersectmbo/cardano-prelude/blob/master/CONTRIBUTING.md

Check the last available 'index-state' within the current Hackage pin using 'nix eval'. This command is useful for verifying the state of the cabal index after updates.

```bash
nix eval .#last-index-state
```

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