tsc-output-parser

Parses errors from tsc output to a structured JSON format.

Converts tsc output:

src/actions.ts(691,20): error TS7006: Parameter 'error' implicitly has an 'any' type.

to JSON:

[
  {
    "type": "Item",
    "value": {
      "path": {
        "type": "Path",
        "value": "src/actions.ts"
      },
      "cursor": {
        "type": "Cursor",
        "value": {
          "line": 691,
          "col": 20
        }
      },
      "tsError": {
        "type": "TsError",
        "value": {
          "type": "error",
          "errorString": "TS7006"
        }
      },
      "message": {
        "type": "Message",
        "value": " Parameter 'error' implicitly has an 'any' type.\n"
      }
    }
  }
]

Install

Install with npm i -g @aivenio/tsc-output-parser.

Usage

CLI

Via temporary file:

tsc --strict --noEmit > ts.out
tsc-output-parser ts.out > errors.json

By piping:

tsc --strict --noEmit | tsc-output-parser

API

import { parse } from '@aivenio/tsc-output-parser';

const input = `
src/actions.ts(691,20): error TS7006: Parameter 'error' implicitly has an 'any' type.
`;

const errors = parse(input);

Test examples

To convert the real.txt test example, clone the repo and run:

npm install
npm run peg
./node_modules/.bin/ts-node src/cli.ts test/inputs/real.txt

Motivation

To migrate our code base to TypeScript using strict types, we built tooling to track our progress. The parsing could've been done in many (probably easier) ways, but it serves as a good example of using PEG.js to parse text.