Setting up a Project

VS Code sigasi

The extension will start once a .project file is detected in the root of the open folder. Make sure that you configure your license before trying to work on a project.

The project settings and library mappings are compatible with SiStE . See the Setting Up a Project and Libraries manual pages for all details.

If you’re familiar with Eclipse Resource Filters, note that these are not supported by VS Code and will be ignored if there are any filters in the .project file extension.

For project configuration, open the Sigasi Projects View.

Creating and Importing Projects

Importing a Project from the File System

First, open the folder you want to import through (File > Open Folder…). Then, open the Command Palette (Ctrl+Shift+P) and run the command Sigasi: Add VHDL Support or Sigasi: Add Verilog/SystemVerilog Support.

VS Code: Add Language Support

Creating a New Project From Scratch

To create a new project, open the Command Pallet (View > Command Pallete…), execute the command Sigasi: Create New VHDL Project or Sigasi: Create New Verilog/SystemVerilog Project, choose the project location, then give your project a name.

VS Code: Create New Project

Next, you need to indicate the project’s root folder to create a .project file in your folder containing the project configurations.

Once the .project file is detected, the Sigasi extension will fully start, which you can notice by the appearance of a Project View below the default VSC file explorer.
From then on, you should use the Project View instead of the VSC file explorer.

If you need mixed language support, you can use the two following commands. It doesn’t matter which one you initially chose.

  • Sigasi: Add VHDL Support
  • Sigasi: Add Verilog/SystemVerilog Support

Importing Another Tool’s Project

You can import a project from another tool, e.g., a Quartus project, by first converting it using scripts into a Sigasi Studio project. The scripts and documentation are available at .

Tutorial and Demo Projects

A tutorial project and demo project are available through the extension.


The tutorial project covers most of Sigasi’s features. Press Ctrl+Shift+P and start typing Sigasi: Create Tutorial Project to open the tutorial.

When the extension has finished building the project, you will see a number of issues for some files pop-up in the Project View.

There will also be several errors and warnings in the status bar. When clicking it, the Problems View opens. Within that view, you can navigate through the error and warning markers for the project.

Errors and Warnings status bar indicator


You can also open a larger demo project using the command Sigasi: Create Demo Project.

Project Configuration

Library Configuration

For VHDL, libraries are fully supported. For Verilog/SystemVerilog, Sigasi reuses the VHDL library concept (just work in practice) to distinguish between design files that should and shouldn’t be analyzed.

To change library mappings, you can use the right-click menu in the Sigasi Projects View and select Set Library as shown in the image below.

VS Code: Set Library

Then, you can select an existing library or choose New Library… to type a new library name. Once you type a new library name, the file/folder you selected will be added to the library you created. If you want to add a file/folder to an existing library, you can choose one of the existing ones from the list (such as work).

VS Code: Set Library

If you want to exclude files/folders from a Sigasi project, select Exclude from Build. Doing so will cause the file or folder (along with its contents) to no longer be used in your project. Note that the excluded resource(s) will still be visible in the Sigasi Projects View, and you can still add them (Set Library) to the project.

Creating new libraries, adding a file/folder to an existing library, or excluding files/folders from the build will modify your project’s .library_mapping.xml file.

VHDL and Verilog Version

To change the VHDL or Verilog version, right-click on a project, folder, or file in the Sigasi Projects View and click Set Language Version. Then, select whether you want to set the VHDL or Verilog version. If you only see one of the two, you might need to add language support. Finally, select the version you want.

VS Code: Change language version

Language Support

To add or remove language support, you can right-click on a project from the Sigasi Projects View, click Configure, and Add/Remove VHDL or Verilog/SystemVerilog Support. This will enable or disable language preferences, among others.

VS Code: Add or remove language support


To add a new project to your workspace, press File > Add Folder To Workspace. Make sure the project you’re adding has a valid .project file.

Linked Resources

Linked resources are a convenient way to link to a file/folder in the Sigasi ecosystem. It works without having to create symlinks or copy the actual content.

To add a linked resource, you can right-click on the node where you want to add it, then click Add Linked File/Add Linked Folder. A file open dialog will pop-up and you can select the file(s)/folder(s) you want to link.

Environment Variables

Sigasi Studio supports environment variables in its project configuration. This helps to avoid absolute paths in the .project file.

To use environment variables, you have to prefix the environment variable with ENV-. For example, to refer to the home directory, you can use ENV-HOME.

Custom Project Variables

Some variables are automatically defined.

  • PROJECT_LOC with the PATH of your project
  • PARENT-<COUNT>-<VARIABLE> which points to COUNT levels above the PATH of the VARIABLE

For example, if your project lives in /design/projects/project1, then PARENT-2-PROJECT_LOC/companylibrary points to /design/companylibrary.

You can also use custom project variables, e.g., VUNIT, to point to your VUnit installation. You can configure these variables as follows:

  • Press Ctrl+Shift+P to open the Command Palette
  • Select Preferences: Open Settings (UI)
  • In the Setting tab, navigate to Extensions > Sigasi for VHDL & SystemVerilog > General > Custom Project Variables
  • Add variables and their values as required
VS Code: custom project variables

Note that custom project variables can be set on the User level and also per Remote or for a specific Workspace.