Example of task.json for mbed cli project in Visual Studio Code IDE

task.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "build release clean",
            "type": "shell",
            "command": "mbed",
            "args": ["compile", "--profile", "release", "-c", "-N", "firmware"],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": {
                "owner": "cpp",
                "fileLocation": ["relative", "${workspaceFolder}"],
                "pattern": 
                    {
                        "regexp": "^(\\[ERROR\\])*\\s*(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
                        "file": 2,
                        "line": 3,
                        "column": 4,
                        "severity": 5,
                        "message": 6
                    }            
            }
        },
        {
            "label": "build release",
            "type": "shell",
            "command": "mbed",
            "args": ["compile", "--profile", "release", "-N", "firmware"],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "problemMatcher": {
                "owner": "cpp",
                "fileLocation": ["relative", "${workspaceFolder}"],
                "pattern": 
                    {
                        "regexp": "^(\\[ERROR\\])*\\s*(.*):(\\d+):(\\d+):\\s+(warning|error):\\s+(.*)$",
                        "file": 2,
                        "line": 3,
                        "column": 4,
                        "severity": 5,
                        "message": 6
                    }            
            }
        },
        {
            "label": "flash release app",
            "type": "shell",
            "command": "nrfjprog",
            "args": ["--family", "NRF52", "--program", "./BUILD/NRF52_DK/GCC_ARM-RELEASE/firmware_application.hex", "--sectorerase", "--reset"]
        }
    ]
}

VS Code Defining Problem Matcher: https://code.visualstudio.com/docs/editor/tasks#_defining-a-problem-matcher
Regular Expressions: https://en.wikipedia.org/wiki/Regular_expression
Regular Expression Test Tool: https://regex101.com/