MCP Delphi Build Server

An MCP (Model Context Protocol) server that exposes tools to build and clean Delphi projects (.dproj/.groupproj) on Windows using MSBuild, initializing the RAD Studio environment via rsvars.bat.

Prerequisites

• Windows

• Node.js >= 18

• Embarcadero RAD Studio installed (for rsvars.bat and Delphi toolchain)

• MSBuild available (Visual Studio Build Tools or from RAD Studio toolchain)

Related MCP server: Software Planning MCP Server

Installation

pnpm install
pnpm run build

Or with npm:

npm install
npm run build

Configuration

You can configure defaults via environment variables (use an .env file in this directory if you want):

• RSVARS_BAT: Full path to rsvars.bat (e.g., C:\Program Files (x86)\Embarcadero\Studio\23.0\bin\rsvars.bat)

• MSBUILD_PATH: Full path to msbuild.exe if not in PATH

• DELPHI_CONFIG: Default config (Debug/Release). Default: Release

• DELPHI_PLATFORM: Default platform (Win32/Win64). Default: Win32

Create a .env file like:

RSVARS_BAT=C:\Program Files (x86)\Embarcadero\Studio\23.0\bin\rsvars.bat
MSBUILD_PATH=C:\Program Files\Microsoft Visual Studio\2022\BuildTools\MSBuild\Current\Bin\MSBuild.exe
DELPHI_CONFIG=Release
DELPHI_PLATFORM=Win32

Running

This server speaks MCP over stdio. Start it with:

node --env-file=.env dist/server.js

Or, after installing globally (or as a dependency), run the bin:

mcp-delphi-server

During development:

pnpm run dev

Tools

• delphi.build

  • params: project (string, path to .dproj/.groupproj), configuration? (string), platform? (string), msbuildPath? (string), rsvarsPath? (string)

  • Builds the project using MSBuild. If rsvarsPath (or RSVARS_BAT env) is provided, it will be called before MSBuild in a single shell.

• delphi.clean

  • params: same as delphi.build

  • Cleans the project.

• fpc.build

  • params: source (string, path to .lpr/.pas), output? (string), defines? (string[]), unitPaths? (string[]), includePaths? (string[]), cpu? (string), os? (string), fpcPath? (string)

  • Compiles a Pascal program using Free Pascal Compiler. You can pass an explicit fpcPath or rely on PATH.

• lazarus.build

  • params: project (string, path to .lpi), buildMode? (string), cpu? (string), os? (string), lazbuildPath? (string)

  • Builds a Lazarus project using lazbuild. Optionally set CPU/OS or build mode.

• lazarus.clean

  • params: project (string, path to .lpi), lazbuildPath? (string)

  • Cleans Lazarus build artifacts via lazbuild --clean.

Test projects and scripts

This repo includes small Delphi test projects in test/projects, and a Lazarus sample in test/projects/lazarus. Helper scripts live in scripts/.

• Build all Release targets:

  • pnpm run test:build:all

• Build individually (examples):

  • pnpm run test:build:console:win32

  • pnpm run test:build:console:win64

  • pnpm run test:build:vcl:win32

  • pnpm run test:build:vcl:win64

  • pnpm run test:build:group:win32

  • pnpm run test:build:group:win64

• Clean variants also exist under test:clean:*.

Example invocations

• Delphi via MSBuild

{
  "name": "delphi.build",
  "arguments": {
    "project": "C:/path/to/MyApp.dproj",
    "configuration": "Release",
    "platform": "Win64"
  }
}

• FPC on Windows (using explicit compiler path)

{
  "name": "fpc.build",
  "arguments": {
    "source": "C:/path/to/lazarus/project1.lpr",
    "cpu": "x86_64",
    "os": "win64",
    "fpcPath": "C:/path/to/fpc.exe"
  }
}

• Lazarus via lazbuild on Windows

{
  "name": "lazarus.build",
  "arguments": {
    "project": "C:/path/to/lazarus/project1.lpi",
    "cpu": "x86_64",
    "os": "win64",
    "lazbuildPath": "C:/path/to/lazbuild.exe"
  }
}

Notes

• Windows-first. Delphi integration requires RAD Studio toolchain and MSBuild.

• For RAD Studio, rsvars.bat sets required environment variables (like BDS, FrameworkDir, Library path). It is recommended to set RSVARS_BAT to ensure the Delphi toolchain is available to MSBuild.

• Group projects (.groupproj) are supported; MSBuild will traverse contained projects.

• FPC/Lazarus support is included via fpc and lazbuild. Provide explicit paths on Windows if they are not in PATH.

Publish

• Ensure dist is built: pnpm run build

• Optionally test locally via: pnpm run test:build:all

• Publish to npm:

  • npm publish (or pnpm publish)

If publishing under a scope, set the package name accordingly and ensure you are logged in with proper access.