ECL for Visual Studio Code

For list of latest changes, please see the Change Log at the main GitHub repository.

This extension adds rich language support for HPCC Systems ECL language (for the HPCC-Platform) to VS Code, including:

Syntax highlighting
Auto completion
Client tools discovery and integration
HPCC-Platform server support
Integrated result viewer

Recent Highlights

v2.30.x

Added ecl.preferredECLWatch setting, allows user to nominate preferred version of ECL Watch when opening "external" pages.

v2.24.x

Added context menu to ECL bundles and ECL Client Tools
Added ecl.WUShowResults setting, allows user to control how results are displayed after submitting a workunit.

v2.23.x

Added ecl.submitNoArchive command, submits raw content of editor to server without creating an archive first.
Added ecl.pingInterval setting, allows user to change or disable the "server alive" ping.
Updated shift+F1 help to use new HPCC Systems website and include the Standard Library.

v2.19.x

Added ecl.saveOnSyntaxCheck and ecl.saveOnSubmit option to ECL Settings (defaulting to off to match ECL IDE behaviour).

v2.15.x

Add path option to launch configuration (to assist with proxy servers).

v2.14.x

Add Copy WUID context menu.

v2.13.x

Add ecl.forceProxySupport setting.

v2.12.x

Added extra support for Trustwave CA authority.
Fixed issue with rejectAuthorized: false being ignored.
Updated translations, added FR locale.
Added "Copy as ECL ID" command to explorer and editor tab context menus.

Version 2.12

v2.11.x

Added "Import MOD file" command

v2.10.x

Enhanced digital signature support:
- ECL: Verify ECL Signature

v2.9.x

KEL:
- Optionally use grammar for syntax as you type checking (now off by default).
- Improved syntax highlighting
- Default syntax checking "on open" to true

v2.8.x

Added digital signature support:
- ECL: Sign ECL

v2.7.x

Preliminary localisation support:
- en
- zh
- pt-br
- es

Version 2.7

v2.6.0

Added HPCC resources page:
- List of available bundles:
  - Install
  - Uninstall
  - Open homepage
- List of available client tools
  - Select (force) specific version
  - Deselect forced version
  - Open terminal for specific version
  - Open download page for Client Tools

Version 2.6

v2.5.0

Added context menu items for Workunits in the Workunit Tree:
- Abort Workunit (only available for running WUs)
- Delete Workunit (Only available for completed WUs)

Version 2.5

v2.4.0

Added result viewer to bottom pane
Added "Copy Results as ECL"

Version 2.4

v2.3.0

Added list of "found" logical files to Insert Record Definition

Version 2.3

v2.2.0

Added Insert Record Definition menu item

v2.1.0

Reworked submission process:

Launch configuration:
- Simplified
- Can be selected from the status bar
- Can be pinned to specific ECL files
Target Cluster:
- Can be selected from the status bar
- Can be pinned to specific ECL files
Submit / Compile now available from:
- Context menu
- Top of editor
Recent Workunits:
- Tree view of recent workunits
- Toggle between "Mine" and "All"
- Open in external browser icon added to several locations

Quick Start

Version 2.x introduces a new streamlined submission process. The "old" Run/Debug pane support has been deprecated and will be removed in the future.

Quick Start

Open folder
Open ECL file
Create Launch Configuration (if needed)
Select the target by:
- Clicking the "Launch Configuration" in the status bar
- Optionally clicking on the "Target Cluster" in the status bar
Monitor Workunit in the "Workunit History" pane
Click on Workunit to view results / issues in the bottom pane

ECL

\n+## AI / Chat Integration

The extension contributes experimental Language Model (AI) tools and a chat participant:

Chat participant ECL (chat.ecl) – provides ECL language and docs assistance.
Tools (declared in package.json under contributes.languageModelTools and registered in src/ai/tools.ts):
- ecl-listWorkunits – List recent workunits (currently mock data unless connected API integration is completed).
- ecl-submitSnippet – Submit a small ECL snippet and return a mock WUID.

Runtime registration adds each tool to an in-memory registry (toolRegistry) so future prompt engineering and chat flows can surface available tool capabilities without re-reading the manifest. See src/ai/tools.ts for the implementation and TODO markers indicating where to integrate with real HPCC Platform session APIs.

NOTE: These features depend on the VS Code Language Model / Chat APIs which are still evolving. Behavior may change in future VS Code versions.

Copilot Chat Integration

This extension contributes an ECL specific Chat participant (chat.ecl) with commands:

@ecl /create – Scaffold a new ECL file.
@ecl /docs <question> – Ask a question answered using the HPCC Systems online language & standard library reference.
@ecl /meta <question> – Provide questions or guidance that should leverage structural metadata from the currently active ECL editor (module names, exports, records, datasets, functions, services, imports, header comment, and basic size stats). The assistant automatically includes this metadata in the prompt enabling context‑aware refactoring suggestions and explanations.

Example:

@ecl /meta Explain what the exported records are used for and suggest a clearer function name for MyFunc.

If no ECL editor is active, the /meta command will indicate that no metadata is available.

ECL Commands

The following ECL specific commands are available. Note: These commands will not be active until an ECL file has been opened (as this triggers the extension to load). To activate a command either use its associated hotkey or press ctrl/cmd+shift+p and type ECL this will present a filtered list of the ECL specific commands:

Global:

Command	Shortcut	Description
Syntax Check All Files	shift+F7	Save All + check syntax of all files.
Syntax Clear	ctrl/cmd+F7	Clear all previously reported ECL Syntax Check results
Import '.mod' file		Import MOD file into workspace
Language Reference Website		Opens the ECL language reference website in external browser
Terminal		Opens ECL Client Tools Terminal Session

Within the ECL Code Editor:

Command	Shortcut	Description
Submit	F5	Submit ECL
Compile		Compile ECL
Syntax Check	F7	Save and check syntax of current file
Submit (No Archive)	ctrl/cmd+F5	Submit raw ECL without creating an archive
Verify ECL Signature		Verify ECL Digital Signature
Language Reference Lookup	shift+F1	For the currently selected text, search the online ECL language reference
Insert Record Definition	ctrl/cmd+R	Fetches record definition for given logical file

Command	Shortcut	Description

\n+## Testing \n+Two layers of automated tests are provided:\n+\n+1. Unit (Vitest): Fast logic tests under test/ (e.g. manifest.test.ts). Run with:\n+ bash\n+ npm run test-run\n+ \n+2. Integration (VS Code host + Mocha): Live extension environment tests under test/integration/. Run with:\n+ bash\n+ npm run test:integration\n+ \n+\n+Run both sequentially:\n+bash\n+npm run test:all\n+\n+\n+Integration tests use @vscode/test-electron to launch an isolated VS Code. Some activation scenarios are skipped if optional dependency extensions (e.g. GordonSmith.observable-js) are not installed in the harness; such tests are marked pending instead of failing. Add new integration suites in test/integration/suite/*.test.ts and keep them focused (assert command registration, language features, etc.).\n+ | Copy as ECL ID | | Copy path as Qualified ECL ID |

Within the Workunit Tree Title Bar:

Command	Shortcut	Description
My workunits		Toggle between "My" and "All" Workunits
All workunits		Toggle between "My" and "All" Workunits
Refresh		Refresh Tree
ECL Watch		Launch ECL Watch in external browser
Switch Platform		Switch HPCC Platform instance (launch configuration)

Within the Workunit Tree:

Command	Shortcut	Description
Copy WUID		Copy workunit ID to clipboard
Abort Workunit		Abort running workunit
Delete Workunit		Delete completed workunit

Command	Shortcut	Description
Copy as ECL ID		Copy path as Qualified ECL ID

Within the Status Bar

Command	Shortcut	Description
Launch Configuration		Click to select launch configuration
Target Cluster		Click to select target cluster
Pin		Pin current launch configuration and target cluster to current document
Client Tools		Click to select client tools version

Within the Result View

All commands in the Result View are available via context menu.

Command	Notes
Copy Column as ECL Set	Right Click on Column Header
Copy Row as ECL	Right Click in Result Body
Copy All as ECL	Right Click in Column Header or Result Body

Testing

Unit Tests (Vitest)

Purpose: Validate logic (utilities, transformations) quickly without starting a VS Code Extension Host.

Run in watch mode:

npm run test-vitest

One-off with coverage:

npm run test-coverage

Configuration lives in vitest.config.ts (jsdom environment). Avoid importing heavy VS Code APIs directly—wrap them so they can be mocked for unit tests.

Manifest Assertions

test/manifest.test.ts validates that required activation events and core commands are present in package.json without launching VS Code. If full extension‑host integration tests are needed later, a harness (e.g. @vscode/test-electron) can be reintroduced in a future change.

Full Pipeline

Runs lint -> build -> unit tests.

npm test

ECL Settings

The following Visual Studio Code settings are available for the ECL extension. These can be set in user preferences (ctrl/cmd+,) or directly in your current workspace (.vscode/settings.json):


  // Override eclcc auto detection.
  "ecl.eclccPath": ""

  // eclcc arguments.
  "ecl.eclccArgs": [],

  // eclcc syntax check arguments.
  "ecl.eclccSyntaxArgs": [],

  // Write eclcc log file to specified file.
  "ecl.eclccLogFile": ""

  // Run 'eclcc -syntax' on save.
  "ecl.syntaxCheckOnSave": true

  // Run 'eclcc -syntax' on load.
  "ecl.syntaxCheckOnLoad": true

  // Additional folders to use when resolving IMPORT statements.
  "ecl.includeFolders": []

  // Add '-legacy' argument to eclcc.
  "ecl.legacyMode": false

  // Debug level logging (requires restart).
  "ecl.debugLogging": false

  // Show results after submitting a workunit.
  "ecl.WUShowResults": internal | external | disabled

  // Force global 'proxySupport' to 'fallback'
  "ecl.forceProxySupport": false

  // Save file prior to syntax check
  "ecl.saveOnSyntaxCheck": false

  // Save file prior to submission
  "ecl.saveOnSubmit": false

  // Ping interval (secs, -1 to disable)
  "ecl.pingInterval": 5

  // Preferred version of ECL Watch (default v9).
  "ecl.preferredECLWatch": v9 | v5

ECL Launch Settings

Submitting ECL using VS-Code requires specifying the target environment within the VS Code launch.json (pressing F5 will prompt you to auto create a skeleton file if none exists):

// Default ECL Launch Configuration
{
  "name": "localhost",
  "type": "ecl",
  "request": "launch",
  "protocol": "http",
  "serverAddress": "localhost",
  "port": 8010,
  "targetCluster": "hthor",
  "path": "",
  "abortSubmitOnError": true,
  "rejectUnauthorized": true,
  "resultLimit": 100,
  "timeoutSecs": 60,
  "user": "vscode_user",
  "password": ""
}

KEL

KEL is an optional language that can generate ECL.

KEL Commands

The following KEL specific commands are available. Note: These commands will not be active until a KEL file has been opened (as this triggers the extension to load). To activate a command either use its associated hotkey or press ctrl/cmd+shift+p and type KEL this will present a filtered list of the KEL specific commands:

Within the KEL Code Editor:

Syntax Check [F7] - Save + check syntax of current file.
Generate ECL [F5] - Save + generate ECL files.

Within the Status Bar

Click on KEL Client Tools Version

Select Client Tools Version - Select Client Tools Version from available options.

KEL Settings

The following Visual Studio Code settings are available for the KEL extension. These can be set in user preferences (ctrl/cmd+,) or directly in your current workspace (.vscode/settings.json):

  // Java runtime arguments (e.g. -Xmx12G).
  "kel.javaArgs": []

  // Override KEL auto detection
  "kel.kelPath": ""

  // Check syntax on save.
  "kel.syntaxCheckOnSave": true

  // Generated ECL location (Same Folder | Child Folder)."
  "kel.generateLocation": "Same Folder"

  // "Generate ECL on save."
  "kel.generateOnSave": false

  // Check syntax on load.
  "kel.syntaxCheckOnLoad": true

  // Check syntax with KEL grammar (fast)
  "kel.syntaxCheckFromGrammar": false

Building and Debugging the Extension

To set up a development environment for debugging the ECL for VS Code extension:

cd /Some/Dev/Folder/
git clone https://github.com/hpcc-systems/vscode-ecl
cd vscode-ecl
git submodule update --init --recursive
npm install

At which point you can open the vscode-ecl folder within VS Code.

Next start the background build process by pressing ctrl+shift+b (which will run the default build command in .vscode/tasks.json)

At which point you can edit the sources and launch debug sessions via F5 and included launch configurations.

License

Apache-2.0

ECL Language

HPCC Systems

ECL for Visual Studio Code

Recent Highlights

v2.30.x

v2.24.x

v2.23.x

v2.19.x

v2.15.x

v2.14.x

v2.13.x

v2.12.x

v2.11.x

v2.10.x

v2.9.x

v2.8.x

v2.7.x

v2.6.0

v2.5.0

v2.4.0

v2.3.0

v2.2.0

v2.1.0

Quick Start

ECL

Copilot Chat Integration

ECL Commands

Global:

Within the ECL Code Editor:

Within the ECL Code Editor Tab Context Menu:

Within the Workunit Tree Title Bar:

Within the Workunit Tree:

Within the Explorer Tree Context Menu (ecl files only):

Within the Status Bar

Within the Result View

Testing

Unit Tests (Vitest)

Manifest Assertions

Full Pipeline

ECL Settings

ECL Launch Settings

KEL

KEL Commands

Within the KEL Code Editor:

Within the Status Bar

KEL Settings

Building and Debugging the Extension

License