# core/parsers/tool.depcheck.parser.ts

> 30 lines of code and 5 definitions.

Tree: GovLab Quality
Language: typescript
Layer: processing
Canonical: https://banes-lab.com/anatomy/quality#file-quality-core-parsers-tool-depcheck-parser-ts
Source text: https://banes-lab.com/source/quality/core/parsers/tool.depcheck.parser.ts.txt

Listed in [core/parsers](https://banes-lab.com/api/source/quality/core/parsers.md), after [core/parsers/tool.credo.parser.ts](https://banes-lab.com/source/quality/core/parsers/tool.credo.parser.ts.md) and before [core/parsers/tool.dependency-cruiser.parser.ts](https://banes-lab.com/source/quality/core/parsers/tool.dependency-cruiser.parser.ts.md).

## Definitions

- `dependencyFinding` (lexical_declaration, line 10)
- `parseDepcheckOutput` (lexical_declaration, line 22, exported)
- `TOOL` (lexical_declaration, line 8)
- `report` (lexical_declaration, line 23, exported)
- `unused` (lexical_declaration, line 24, exported)

## Contained in

- [core/parsers](https://banes-lab.com/anatomy/quality/folder-quality-core-parsers.md)

## Uses

- [configuration/strings/tool.strings.ts](https://banes-lab.com/source/quality/configuration/strings/tool.strings.ts.md)
- [core/factories/finding.factory.ts](https://banes-lab.com/source/quality/core/factories/finding.factory.ts.md)
- [core/selectors/record.selector.ts](https://banes-lab.com/source/quality/core/selectors/record.selector.ts.md)

## Linked from

- [configuration/strings](https://banes-lab.com/anatomy/quality/folder-quality-configuration-strings.md)
- [core/factories](https://banes-lab.com/anatomy/quality/folder-quality-core-factories.md)
- [core/parsers](https://banes-lab.com/anatomy/quality/folder-quality-core-parsers.md)
- [core/selectors](https://banes-lab.com/anatomy/quality/folder-quality-core-selectors.md)

## Source

```typescript
import { NPM_MANIFEST, POSITION } from "#configuration/constants/tool.constants";
import { missingDependency, unusedDependency } from "#configuration/strings/tool.strings";
import { recordAt, stringArrayField } from "#core/selectors/record.selector";
import type { Finding } from "#types/finding.types";
import { advisoryFinding } from "#core/factories/finding.factory";
import { jsonRecord } from "#core/parsers/record.parser";

const TOOL = "depcheck";

const dependencyFinding = function dependencyFinding(ecosystem: string, ruleId: string, message: string): Finding {
    return advisoryFinding({
        column: POSITION,
        ecosystem,
        file: NPM_MANIFEST,
        line: POSITION,
        message,
        ruleId,
        tool: TOOL,
    });
};

export const parseDepcheckOutput = function parseDepcheckOutput(stdout: string, ecosystem: string): Finding[] {
    const report = jsonRecord(stdout || "{}");
    const unused = [...stringArrayField(report, "dependencies"), ...stringArrayField(report, "devDependencies")];
    return [
        ...unused.map((name) =>
            dependencyFinding(ecosystem, "unused-dependency", unusedDependency(name, NPM_MANIFEST)),
        ),
        ...Object.keys(recordAt(report, "missing")).map((name) =>
            dependencyFinding(ecosystem, "missing-dependency", missingDependency(name, NPM_MANIFEST)),
        ),
    ];
};
```