### Install GHC by Version Prefix

Source: https://github.com/haskell/ghcup-hs/blob/master/CHANGELOG.md

Install a GHC version by specifying a major.minor version prefix. ghcup will select the latest available GHC matching this prefix.

```bash
ghcup install 8.8
```

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

### Hlint Tool Configuration Example

Source: https://github.com/haskell/ghcup-hs/blob/master/installer-dsl.md

This YAML snippet defines the configuration for the hlint tool, version 3.10, including download URIs, hashes, and installation details for various operating systems.

```yaml
hlint:
  3.10:
    viTags:
      - Latest
      - Recommended
    viArch:
      A_64:
        Linux_UnknownLinux:
          unknown_versioning:
            dlUri: https://github.com/ndmitchell/hlint/releases/download/v3.10/hlint-3.10-x86_64-linux.tar.gz
            dlHash: ccabc8802a58154699a3583b8dddc5ea2e6d65753a62c45c0e80088ebb16b42b
            dlSubdir: hlint-3.10
            dlInstallInfo: &hlint-install-info1
              bindistFiles:
                exeRules:
                  - installSource: "hlint"
                    installDest: "bin/hlint"
                dataRules:
                  - installPattern: ["data/**"]
                preserveMtimes: false
        Windows:
          unknown_versioning:
            dlUri: https://github.com/ndmitchell/hlint/releases/download/v3.10/hlint-3.10-x86_64-windows.zip
            dlHash: 9dc50b66771920464910472c5ae2b8eb83d33d4eadebe6d99bf512452ca22a20
            dlSubdir: hlint-3.10
            dlInstallInfo: *hlint-install-info1
        Darwin:
          unknown_versioning:
            dlUri: https://github.com/ndmitchell/hlint/releases/download/v3.10/hlint-3.10-x86_64-osx.tar.gz
            dlHash: 7a3d208fb117999336b35a32a68c476f95e22e232357fea5862250f14493cae5
            dlSubdir: hlint-3.10
            dlInstallInfo: *hlint-install-info1
```

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

### Example Shim Configuration

Source: https://github.com/haskell/ghcup-hs/blob/master/scoop-better-shimexe/README.md

Defines the target executable and arguments for the shim. The 'path' is required, while 'args' is optional. Lines must end with a line feed.

```text
path = C:\Program Files\Git\git.exe
args = status -u
```

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

### Install GHC from Arbitrary Bindists

Source: https://github.com/haskell/ghcup-hs/blob/master/CHANGELOG.md

Use this command to install a specific GHC version from a custom bindist URL. Ensure the URL and hash details are correctly provided.

```bash
ghcup -n install ghc -u '{"dlHash": "", "dlSubdir": "ghc-8.10.1", "dlUri": "https://github.com/commercialhaskell/ghc/releases/download/ghc-8.10.1-release/ghc-8.10.1-x86_64-deb9-linux.tar.xz"}' 8.10.1
```

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

### Compile shim.c

Source: https://github.com/haskell/ghcup-hs/blob/master/scoop-better-shimexe/README.md

Compile the shim.c source file using a Visual Studio command prompt. This command optimizes for size.

```bash
cl /O1 shim.c
```

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

### Set Downloader Client

Source: https://github.com/haskell/ghcup-hs/blob/master/CHANGELOG.md

Choose the downloader client (curl or wget) to be used by ghcup with the --downloader option.

```bash
ghcup --downloader=curl
```

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

### Control Temporary Build Directory Cleanup

Source: https://github.com/haskell/ghcup-hs/blob/master/CHANGELOG.md

Specify how temporary build directories should be cleaned up using the --keep option. Options include 'always', 'errors', or 'never'.

```bash
ghcup --keep=always
```

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

### Launch TUI Mode

Source: https://github.com/haskell/ghcup-hs/blob/master/CHANGELOG.md

Access the new curses (brick) based TUI by running this command. This provides an interactive interface for managing Haskell environments.

```bash
ghcup tui
```

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

### Replace Scoop Shims

Source: https://github.com/haskell/ghcup-hs/blob/master/scoop-better-shimexe/README.md

Replace existing .exe files in the scoop\shims directory with the compiled shim.exe.

```bash
Replace any .exe in scoop\shims by shim.exe.
```

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

### Shim Format Specification

Source: https://github.com/haskell/ghcup-hs/blob/master/scoop-better-shimexe/README.md

Shims use a line-separated key-value pair format, similar to Scoop's shims. Ensure lines end with a line feed.

```text
path = C:\Program Files\Git\git.exe
args = status -uno
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.