how to configure files paths in VSCode task errors

I configured a task in VSCode to compile a Delphi 2005 dpk. It is working and returning the errors on the "problems view", but it is not showing that errors in the file.

I think it is happening because when I click on an error, I get the error message:

Unable to open 'sr075pro.pas': File not found (...projectfolder\sr075pro.pas)

But the file is in ...projectfolder\webservices\sr075pro.pas.

I can't find a way to tell to the task that the file is in a subfolder. I tried to use the "relative" option on the "fileLocation" tag without sucess.

The error returned:

Compiling sa_webservices...
Borland Delphi  Version 13.0  Copyright (c) 1983,99 Inprise Corporation
sr075pro.pas(99) Error: Undeclared identifier: 'ni'
sa_webservices.dpk(802) Fatal: Could not compile used unit 'sr075pro.pas'

My task configuration:

{
  "version": "0.1.0",
  "name": "Compilar",
  "command": "C:\\Compilers\\compile.bat",
  "suppressTaskName": true,
  "isShellCommand": true,
  "isBuildCommand": true,
  "tasks": [
{
      "taskName": "Compile sa_webservices",
      "isBuildCommand": false,
      "isTestCommand": false,
      "showOutput": "always",
      "args": [
        "sa_webservices"
      ],
      "problemMatcher": {
        "owner": "external",
        "fileLocation": "relative",
        "pattern": {
          "regexp": "^([\\w]+\\.(pas|dpr|dpk))\\((\\d+)\\)\\s(Fatal|Error|Warning|Hint):(.*)",
          "file": 1,
          "line": 3,
          "message": 5
        }
      }
    }

My compile.bat:

@echo off
@P:
@set arg1=%1
shift

...
if "%arg1%" == "sa_webservices" set arg2="webservices" 
...
echo Compiling %arg1%...
cd\%arg2% 
dcc32.exe -H -W -Q %arg1%.dpk

Solution

Your task configuration is wrong. First of all you don't close all brackets but I guess it's a mistake made by copying and pasting it here on StackOverflow. Otherwise the task configuration wouldn't have worked at all.

Now to the real problem: DCC32 produces hints and warnings containing relative file paths. These paths are relative to the project file. In your task configuration you define the compiler's output to contain relative paths by setting

"fileLocation": "relative"

Visual Studio Code doesn't know how to build the correct absolute path from the relative paths given by the compiler message. So it guesses your current ${workspaceRoot} (in your case it's projectfolder) would be the absolute path.

This explains why you see errors and warnings which contain wrong file paths. In order to get the correct paths you'll need to tell VSCode the correct path to combine the relative paths with. You do this by simply adding the correct path to the fileLocation entry in you tasks.json:

"fileLocation": ["relative", "${workspaceRoot}\\webservices"]

The entire tasks.json looks like that:

{
    "version": "0.1.0",
    "name": "Compilar",
    "command": "C:\\Compilers\\compile.bat",
    "suppressTaskName": true,
    "isShellCommand": true,
    "isBuildCommand": true,
    "tasks": [
        {
            "taskName": "Compile sa_webservices",
            "isBuildCommand": false,
            "isTestCommand": false,
            "showOutput": "always",
            "args": [
                "sa_webservices"
            ],
            "problemMatcher": {
                "owner": "external",
                "fileLocation": ["relative", "${workspaceRoot}\\webservices"],
                "pattern": {
                    "regexp": "^([\\w]+\\.(pas|dpr|dpk))\\((\\d+)\\)\\s(Fatal|Error|Warning|Hint):(.*)",
                    "file": 1,
                    "line": 3,
                    "message": 5
                }
            }
        }
    ]
}