serve-d

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Microsoft language server protocol implementation for D.

This program is the heart of code-d and implements most IDE features in D.

The purpose of this project is to give every editor the same capabilities and editing features as code-d through the widely available Microsoft Language Server Protocol (LSP).

Special Thanks

Thanks to the following big GitHub sponsors financially supporting the code-d/serve-d tools:

Jaen (@jaens)

become a sponsor

Features

See code-d wiki

This implements most language features of the language server protocol for D and also a lot of support for other D related files such as vibe.d diet files and DlangUI DML files.

Usage

To use serve-d you will need an Editor (client) with support for the Language Server Protocol. Depending on the editor the initialization code might look different and will need to be adapted for each editor. This is relatively small though and can be done easily for all editors.

Officially Supported Editors

Visual Studio Code: using code-d
Atom: using ide-d

add LSP configurations using serve-d for other editors and PR them here!

Other Editor Guides

Project Layout

serve-d:http - Downloads a file over HTTP with progress using WinHTTP on Windows and the dub requests library on other platforms.
serve-d:lsp - LSP protocol types and RPC primitives
serve-d:serverbase - LSP server basics for quickly creating an LSP server for any language.
serve-d:dcd - DCD client using direct communication (without spawning dcd-client) for lower latency
serve-d:workspace-d - Implementation of core D functionality and source code processing using libdparse, dfmt, D-Scanner and DCD.
source/ - Maps LSP commands and state to serve-d:workspace-d functionality.

Command Line options

serve-d offers the following command line options to allow the LSP client to configure serve-d on startup:

Option	Default	Description
`-r` / `--require`	[]	(allows multiple, optional) List of options which this serve-d version needs to implement. serve-d will intentionally crash on startup if one of the given options is not supported by this version. Specifying or not specifying them will not change anything on runtime. Implemented features: `d` (PoC / unneeded), `workspaces` (multi-workspace support)
`-p` / `--provide`	[]	(allows multiple, optional) List of options to affect behavior of serve-d. Use this to indicate support for special editor features/extensions not covered by the LSP spec. Supported values: (see provides list below)
`-v` / `--version`	n/a	Prints the version to stdout and exists
`--logfile`	n/a	Overrides the logging output to log to a file instead of stderr for debug logs
`--loglevel`	`verbose` for debug/nightly builds, otherwise `info`	Changes the minimum log level when messages are logged. See `serve-d --help` for possible values
`--lang`	`en`	Changes the language of GUI messages to a supported translation
`--wait`	`false`	Waits for one second before starting (useful to be able to attach when debugging)

`--provide` values

The following provide values are supported by serve-d and will improve interop with the editor:

--provide http

When this provide flag is set, serve-d will send a request to the client when it wants to download a file (commonly DCD server files) using the coded/interactiveDownload request.

If this is not set, an internal download function is used which calls coded/logInstall on the client on every progress event.

--provide implement-snippets

If this is set, the served/implementMethods request will return TextEdits with snippet strings inside of them as defined by vscode.

--provide context-snippets

If this is set, auto completion requests will also return built-in and custom defined snippets.

Custom requests/notifications

serve-d defines a variety of custom requests and notifications for better editor integration. All requests starting with coded/ are sent from serve-d to the client and all requests starting with served/ are sent from client to serve-d at any time.

serve-d internally handles an active instance which is the instance where last a relevant command has been run. (such as auto complete) It will be used for some commands.

Request `served/sortImports`

Parameter: SortImportsParams

Returns: TextEdit[]

Command to sort all user imports in a block at a given position in given code. Returns a list of changes to apply. (Replaces the whole block currently if anything changed, otherwise empty)

interface SortImportsParams
{
	/** Text document to look in */
	textDocument: TextDocumentIdentifier;

	/** Location of cursor as standard offset */
	location: number;
}

Request `served/implementMethods`

Parameter: ImplementMethodsParams

Returns: TextEdit[]

Implements the interfaces or abstract classes of a specified class/interface. The given position must be on/inside the identifier of any subclass after the colon (:) in a class definition.

interface ImplementMethodsParams
{
	/** Text document to look in */
	textDocument: TextDocumentIdentifier;

	/** Location of cursor as standard offset */
	location: number;
}

Request `served/restartServer`

Parameter: none

Returns: true

Restarts all DCD servers started by this serve-d instance. Returns true once done.

Notification `served/killServer`

Parameter: none

Kills all DCD servers started by this serve-d instance.

Request `served/addDependencySnippet`

Parameter: AddDependencySnippetParams

Returns: boolean

Registers a snippet across the whole serve-d application which may be limited to given grammatical scopes.

Requires --provide context-snippets

Returns false if SnippetsComponent hasn't been loaded yet, otherwise true.

Notification `served/updateDCD`

Parameter: none

Manually triggers a DCD update either by compiling from source or downloading prebuilt binaries depending on the host system and serve-d. Excessively calls the coded/logInstall notification.

Request `served/listConfigurations`

Parameter: none

Returns: string[]

Returns an empty array if there is no active instance or if it doesn't have dub.

Otherwise returns the names of available configurations in dub.

Request `served/switchConfig`

Parameter: string

Returns: bool

Sets the current dub configuration for building and other tools. Returns true on success.

Request `served/getConfig`

Parameter: none

Returns: string

Returns the current dub configuration or null if there is no dub in the active instance.

Request `served/listArchTypes`

Parameter: ListArchTypesParams

Returns: string[] | ArchTypeInfo[]

Returns an empty array if there is no active instance or if it doesn't have dub.

Otherwise returns the names of available architectures in dub. (e.g. x86 or x86_64)

interface ListArchTypesParams
{
	/** If true, return ArchTypeInfo[] with meanings instead of string[] */
	withMeaning?: boolean;
}

interface ArchTypeInfo
{
	/** The value to use with a switchArchType call / the value DUB uses. */
	value: string;
	/** If not null, show this string in the UI rather than value. */
	label: string | null;
}

Request `served/switchArchType`

Parameter: string

Returns: bool

Sets the current architecture for building and other tools. Returns true on success.

Request `served/getArchType`

Parameter: none

Returns: string

Returns the current dub architecture or null if there is no dub in the active instance.

Request `served/listBuildTypes`

Parameter: none

Returns: string[]

Returns an empty array if there is no active instance or if it doesn't have dub.

Otherwise returns the names of available build types in dub.

Request `served/switchBuildType`

Parameter: string

Returns: bool

Sets the current dub build type for building and other tools. Returns true on success.

Request `served/getBuildType`

Parameter: none

Returns: string

Returns the current dub build type or null if there is no dub in the active instance.

Request `served/getCompiler`

Parameter: none

Returns: string

Returns the name of the current compiler.

Request `served/switchCompiler`

Parameter: string

Returns: bool

Sets the current compiler to use in dub for building and other tools. Returns true on success.

Request `served/addImport`

Parameter: AddImportParams

Returns: ImportModification

Parses the source code and returns code edits how to insert a given import into the code.

interface AddImportParams
{
	/** Text document to look in */
	textDocument: TextDocumentIdentifier;
	/** The name of the import to add */
	name: string;
	/** Location of cursor as standard offset */
	location: number;
	/** if `false`, the import will get added to the innermost block */
	insertOutermost?: boolean = true;
}

interface ImportModification
{
	/** Set if there was already an import which was renamed. (for example import io = std.stdio; would be "io") */
	rename: string;

	/** Array of replacements to add the import to the code */
	replacements: CodeReplacement[];
}

interface CodeReplacement
{
	/**
	 * Range what to replace. If both indices are the same its inserting.
	 *
	 * This value is specified as bytes offset from the UTF-8 source.
	 */
	size_t[2] range;

	/** Content to replace it with. Empty means remove. */
	string content;
}

Request `served/updateImports`

Parameter: UpdateImportsParams

Returns: boolean

Refreshes the dub dependencies from the local filesystem. Triggers a coded/updateDubTree notification on success and updates imports in DCD.

Returns true on success.

interface UpdateImportsParams
{
	/// set this to false to not emit progress updates for the UI
	reportProgress?: bool;
}

Request `served/listDependencies`

Parameter: string packageName

Returns: DubDependency[]

Lists the dependencies of a given dub package name. If no package name is given (empty string) then all dependencies of the current instance will be listed.

interface DubDependency
{
	/** The name of this package */
	name: string;
	/** The installed version of this dependency or null if it isn't downloaded/installed yet */
	version: string;
	/** Path to the directory in which the package resides or null if it's not stored in the local file system. */
	path: string;
	/** Description as given in dub package file */
	description: string;
	/** Homepage as given in dub package file */
	homepage: string;
	/** Authors as given in dub package file */
	authors: string[];
	/** Copyright as given in dub package file */
	copyright: string;
	/** License as given in dub package file */
	license: string;
	/** List of the names of subPackages as defined in the package */
	subPackages: string[];
	/** `true` if this dependency has other dependencies */
	hasDependencies: boolean;
	/** `true` if no package name was given and thus this dependency is a root dependency of the active project. */
	root: boolean;
}

Request `served/buildTasks`

Parameter: none

Returns: Task[]

Returns a list of build tasks for all dub instances in the project. Currently each with Build, Run, Rebuild and Test commands.

enum TaskGroup
{
	clean = "clean",
	build = "build",
	rebuild = "rebuild",
	test = "test"
}

interface Task
{
	/// the default JSON task
	definition: any;
	/// global | workspace | uri of workspace folder
	scope: string;
	/// command to execute
	exec: string[];
	/// name of the task
	name: string;
	/// true if this is a background task without shown console
	isBackground: boolean;
	/// Task source extension name
	source: string;
	/// clean | build | rebuild | test
	group: TaskGroup;
	/// problem matchers to use
	problemMatchers: string[];
}

Notification `served/convertDubFormat`

Params: DubConvertRequest

Starts a conversion of a dub.json/dub.sdl file to a given other format. Shows an error message in the UI if unsuccessful and triggers a workspace/applyEdit command when successful with the new content.

interface DubConvertRequest
{
	/** Text document to look in */
	textDocument: TextDocumentIdentifier;
	/** The format to convert the dub recipe to. (json, sdl) */
	newFormat: string;
}

Notification `served/installDependency`

Params: InstallRequest

Adds a dependency to the dub recipe file of the currently active instance (respecting indentation) and calls dub upgrade and updates imports afterwards.

Writes changes to the file system.

interface InstallRequest
{
	/** Name of the dub dependency */
	name: string;
	/** Version to install in the dub recipe file */
	version: string;
}

Notification `served/updateDependency`

Params: UpdateRequest

Changes a dependency in the dub recipe file of the currently active instance (respecting indentation) to the given version and calls dub upgrade and updates imports afterwards.

Does nothing if the dependency wasn't found in the dub recipe.

Writes changes to the file system.

interface UpdateRequest
{
	/** Name of the dub dependency */
	name: string;
	/** Version to install in the dub recipe file */
	version: string;
}

Notification `served/uninstallDependency`

Params: UninstallRequest

Removes a dependency from the dub recipe file of the currently active instance and calls dub upgrade and updates imports afterwards.

Writes changes to the file system.

interface UninstallRequest
{
	/** Name of the dub dependency */
	name: string;
}

Notification `served/doDscanner`

Params: DocumentLinkParams

Manually triggers DScanner linting on the given file. (respecting user configuration)

Request `served/searchFile`

Params: string query

Returns: string[]

Searches for a given filename (optionally also with subfolders) and returns all locations in the project and all dependencies including standard library where this file exists.

Request `served/findFilesByModule`

Params: string module

Returns: string[]

Lists all files with a given module name in the project and all dependencies and standard library.

Request `served/doDscanner`

Params: DocumentLinkParams

Returns: DScannerIniSection[]

Returns the current D-Scanner configuration for a given URI.

/// An ini section of the dscanner.ini which is written in form [name]
interface DScannerIniSection
{
	/// A textual human readable description of the section
	description: string;
	/// The name of the section as written in the ini
	name: string;
	/// Features which are children of this section
	features: DScannerIniFeature[]
}

/// A single feature in a dscanner.ini which can be turned on/off
interface DScannerIniFeature
{
	/// A textual human readable description of the value
	description: string;
	/// The name of the value
	name: string;
	/// Enables/disables the feature or enables it with being disabled in unittests
	enabled: "disabled" | "enabled" | "skip-unittest"
}

Request `served/getActiveDubConfig`

Params: none

Returns dub information for the currently active project (dub project where last file was edited / opened / etc)

Returns: at least

{
    "packagePath": string,
    "packageName": string,
    "targetPath": string,
    "targetName": string,
    "workingDirectory": string,
    "mainSourceFile": string,

    "dflags": string[],
    "lflags": string[],
    "libs": string[],
    "linkerFiles": string[],
    "sourceFiles": string[],
    "copyFiles": string[],
    "versions": string[],
    "debugVersions": string[],
    "importPaths": string[],
    "stringImportPaths": string[],
    "importFiles": string[],
    "stringImportFiles": string[],
    "preGenerateCommands": string[],
    "postGenerateCommands": string[],
    "preBuildCommands": string[],
    "postBuildCommands": string[],
    "preRunCommands": string[],
    "postRunCommands": string[]
}

Request `served/getProfileGCEntries`

Params: none

Returns all profilegc.log entries parsed and combined.

Returns: ProfileGCEntry[]

interface ProfileGCEntry
{
	bytesAllocated: number;
	allocationCount: number;
	type: string; /// the function and/or type name
	uri: string; /// absolute, normalized uri
	displayFile: string; /// as parsed from file
	line: number; /// 1-based line number
}

Client notification `coded/updateSetting`

Params: UpdateSettingParams

Tells the client to update a user or workspace setting. This is done for updating the dcdClientPath and dcdServerPath on installation.

interface UpdateSettingParams
{
	/** The configuration section to update in (e.g. "d" or "dfmt") */
	section: string;
	/** The value to set the configuration value to */
	value: any;
	/** `true` if this is a configuration change across all instances and not just the active one */
	global: bool;
}

Client notification `coded/logInstall`

Params: string message

Instructs the client to log a message that has something to do with the installation routine of serve-d or dependencies.

Client notification `coded/initDubTree`

Params: none

Tells the client that dub has been loaded and the dependency tree can now be fetched.

Client notification `coded/updateDubTree`

Params: none

Tells the client that dub dependencies have been reloaded and should be redisplayed.

Client notification `coded/changedSelectedWorkspace`

Params: WorkspaceState

Tells the client when the active instance changed.

interface WorkspaceState
{
	/** URI to the workspace folder */
	uri: string;
	/** name of the workspace folder (or internal placeholder) */
	name: string;
	/** true if this instance has been initialized */
	initialized: boolean;
	/** true if this is the active instance */
	selected: boolean;
}

Client request `coded/interactiveDownload`

Params: InteractiveDownload

Returns: boolean

Instructs the client to download a file into a given output path using download UI.

This must be implemented if --provide http is given in the command line, otherwise this is not called.

interface InteractiveDownload
{
	/** The URL to download */
	url: string;

	/** The title to show in the UI popup for this download */
	title?: string;

	/** The file path to write the downloaded file to */
	output: string;
}

User Configuration

The server has support for configuration for these items.

Installation

If you use an existing extension (code-d) you will not need to do these steps

If you want to manually get the serve-d binaries or if you want to add installation support for your editor, check out the sections below. The extension code-d already does this automatically and there is no need to do it there.

Installing a pre-built binary:

Grab latest stable ore pre-release with binaries from GitHub releases

Grab latest nightly binaries from GitHub releases

Manually building from source:

dub build

Issues

If you have issues with any editors using serve-d, please report an issue

License

rtbo/serve-d

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