1 | import {
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2 | Diagnostic,
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3 | formatDiagnostics,
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4 | FormatDiagnosticsHost,
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5 | sys,
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6 | } from "typescript";
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7 | import { getCanonicalFileName } from "./fs/path-utils";
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8 | import {
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9 | AbsolutePath,
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10 | DiagnosticsHandler,
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11 | NormalizedOptions,
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12 | } from "./interfaces";
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13 |
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14 | export default class DiagnosticsHandlerImpl implements DiagnosticsHandler {
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15 | private throwOnError: boolean;
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16 | private host: FormatDiagnosticsHost;
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17 | private write = sys.write;
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18 |
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19 | constructor(options: NormalizedOptions) {
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20 | this.throwOnError = options.throwOnError;
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21 | this.host = createFormatDiagnosticsHost(options.workingPath);
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22 | }
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23 |
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24 | public setWrite(write: (s: string) => void) {
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25 | this.write = write;
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26 | }
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27 |
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28 | public check(
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29 | diagnostics: Diagnostic | Diagnostic[] | undefined,
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30 | throwOnError?: boolean
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31 | ): boolean {
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32 | const normalized = normalize(diagnostics);
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33 | if (normalized === undefined) {
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34 | return false;
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35 | }
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36 | const message = this.format(normalized);
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37 | if (this.throwOnError || throwOnError === true) {
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38 | throw new Error(message);
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39 | }
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40 | this.write(message);
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41 | return true;
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42 | }
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43 |
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44 | public format(diagnostics: Diagnostic[]) {
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45 | return formatDiagnostics(diagnostics, this.host);
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46 | }
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47 | }
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48 |
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49 | function normalize(
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50 | diagnostics: Diagnostic | Diagnostic[] | undefined
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51 | ): Diagnostic[] | undefined {
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52 | if (diagnostics === undefined) {
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53 | return undefined;
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54 | }
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55 | if (Array.isArray(diagnostics)) {
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56 | return diagnostics.length === 0 ? undefined : diagnostics;
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57 | }
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58 | return [diagnostics];
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59 | }
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60 |
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61 | function createFormatDiagnosticsHost(
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62 | rootPath: AbsolutePath
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63 | ): FormatDiagnosticsHost {
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64 | const newLine = sys.newLine;
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65 |
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66 | return {
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67 | getCanonicalFileName,
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68 | getCurrentDirectory: () => rootPath,
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69 | getNewLine: () => newLine,
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70 | };
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71 | }
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