# Reference: profile

> Neutral, exhaustive description of `rickub.com/turbo-editors/turbo-core/profile`.

`Profile` is the value an editor built on turbo-core differs by. Every field that would otherwise be a hardcoded name, path or command is here.

## Profile

| Field | Type | Default | Description |
| --- | --- | --- | --- |
| `Name` | `string` | `""` | What the editor calls itself, in window titles and the About box. `"Turbo Go"`. Also sent to the language server as the client's name. |
| `Slug` | `string` | `""` | Its one-word name. `"turbo-go"`. The binary, the project directory, the user directory and the environment variables are all derived from it. |
| `Language` | `string` | `""` | What the editor is for, in prose meant to be read. `"Go"`, `"Rust"`. Appears in messages and in the About box, not in file formats. |
| `ToolsMenu` | `string` | `""` | The label of the toolchain menu, with its hot key marked between tildes. `"~G~o"`, `"Rus~t~"`. |
| `RootMarkers` | `[]string` | `nil` | Files that mark a project's root, in the order they are looked for. `["go.mod"]`, `["Cargo.toml"]`. Empty means no walk up. |
| `Server` | `Server` | zero | The language server. The zero value means the editor runs without one. |
| `Templates` | `Templates` | zero | The starter files the editor offers to write. |

### Derived values

| Method | Returns | Example for `Slug: "turbo-go"` |
| --- | --- | --- |
| `ProjectDir()` | `string` | `".turbo-go"` |
| `UserDir()` | `string` | `"~/.config/turbo-go"`, or `""` when the system has no configuration directory |
| `ThemeDir()` | `string` | `"~/.config/turbo-go/themes"`, or `""` |
| `DirEnvVar()` | `string` | `"TURBO_GO_DIR"` |
| `ThemeDirEnvVar()` | `string` | `"TURBO_GO_THEME_DIR"` |
| `SnippetDirEnvVar()` | `string` | `"TURBO_GO_SNIPPET_DIR"` |

`UserDir` returns the value of `DirEnvVar` when it is set. `ThemeDir` returns the value of `ThemeDirEnvVar` when it is set, and that variable names the theme directory itself rather than the directory above it.

A slug's dashes become underscores in an environment variable name: `turbo-rust` gives `TURBO_RUST_THEME_DIR`.

## Server

| Field | Type | Default | Description |
| --- | --- | --- | --- |
| `Command` | `string` | `""` | The executable's name, looked up on PATH first. `"gopls"`, `"rust-analyzer"`. |
| `Args` | `[]string` | `nil` | The arguments it is started with. gopls takes `["serve"]`; rust-analyzer takes none. |
| `InstallHint` | `string` | `""` | One command the user can copy when the server is missing. Shown on the status bar, so it must fit on a line. |
| `Dirs` | `[]string` | `nil` | Extra directories searched after PATH, in order. Empty strings are skipped. |

### Example

```go
profile.Server{
	Command:     "gopls",
	Args:        []string{"serve"},
	InstallHint: "go install golang.org/x/tools/gopls@latest",
	Dirs:        []string{goBinDir()},
}
```

## Templates

| Field | Type | Formatting arguments, in order |
| --- | --- | --- |
| `Settings` | `string` | the theme name (`%q`), the autosave delay (`%q`) |
| `Snippets` | `string` | the ungrouped group's name (`%s`), the user's own snippets path (`%s`) |
| `Tools` | `string` | none |

A template with the wrong number of verbs produces `%!s(MISSING)` or `%!(EXTRA …)` in the file that is written; nothing checks it for you.

### Example

```go
const settingsTemplate = `# turbo-go project settings.

[editor]

theme = %q
autosave = false
autosave_delay = %q
`
```

## Errors

`profile` returns no errors. A `Profile` with an empty `Slug` produces a project directory called `"."` and environment variables called `_DIR`; nothing refuses it.

## See also

- [Talk to a language server](../how-to/talk-to-a-language-server.md)
- [Write the starter files](../how-to/write-the-starter-files.md)