Omnipascal Build Task

Compile.bat

@echo off

rem SET MSBUILD="C:\Program Files (x86)\MSBuild\12.0\Bin\MSBuild.exe"
SET MSBUILD="C:\Windows\Microsoft.NET\Framework\v3.5\MsBuild.exe"
SET RSVARS="C:\Program Files (x86)\Embarcadero\Studio\17.0\bin\rsvars.bat"

if /i %1%==test (
  SET PROJECT=TestProject\UnitTests.dproj
) else (
  SET PROJECT=project1.dproj
) 

call %RSVARS%   
%MSBUILD% %PROJECT% "/t:Clean,Make" "/p:config=Debug" "/verbosity:minimal"

if %ERRORLEVEL% NEQ 0 GOTO END

echo. 
if /i %1%==test (
  TestProject\UnitTests.exe
)
:END

tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "build",
            "type": "shell",
            "windows": {
                "command": "${workspaceRoot}/.vscode/Compile.bat build"
            },
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "presentation": {
                "echo": true,
                "reveal": "always",
                "focus": false,
                "panel": "shared"
            },
            "problemMatcher": {
                "owner": "external",
                "fileLocation": "relative",
                "pattern": {
                    "regexp": "((([A-Za-z]):\\\\(?: [^\\/:*?\\\"|\\r\\n]+\\\\)*)?[^\\/\\s\\(:*?\\\"|\\r\\n]*)\\((\\d+)\\):\\s.*(fatal|error|warning|hint)\\s(.*):\\s(.*)",
                    "file": 1,
                    "line": 4,
                    "severity": 5,
                    "code": 6,
                    "message": 7
                }
            }
        },
        {
            "label": "test",
            "type": "shell",
            "windows": {
                "command": "${workspaceRoot}/.vscode/Compile.bat test"
            },
            "group": {
                "kind": "test",
                "isDefault": true
            },
            "presentation": {
                "echo": true,
                "reveal": "always",
                "focus": false,
                "panel": "shared"
            },
            "problemMatcher": {
                "owner": "external",
                "fileLocation": [
                    "absolute"
                ],
                "pattern": {
                    "regexp": "((([A-Za-z]):\\\\(?: [^\\/:*?\\\"|\\r\\n]+\\\\)*)?[^\\/\\s\\(:*?\\\"|\\r\\n]*)\\((\\d+)\\):\\s.*(fatal|error|warning|hint)\\s(.*):\\s(.*)",
                    "file": 1,
                    "line": 4,
                    "severity": 5,
                    "code": 6,
                    "message": 7
                }
            }
        }
    ]
}