nx/src/utils/strip-source-code.js

Smart, Fast and Extensible Build System

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.stripSourceCode = void 0;
let SyntaxKind;
function stripSourceCode(scanner, contents) {
    if (!SyntaxKind) {
        SyntaxKind = require('typescript').SyntaxKind;
    }
    if (contents.indexOf('loadChildren') > -1) {
        return contents;
    }
    scanner.setText(contents);
    let token = scanner.scan();
    const statements = [];
    let start = null;
    while (token !== SyntaxKind.EndOfFileToken) {
        const potentialStart = scanner.getStartPos();
        switch (token) {
            case SyntaxKind.MultiLineCommentTrivia:
            case SyntaxKind.SingleLineCommentTrivia: {
                const isMultiLineCommentTrivia = token === SyntaxKind.MultiLineCommentTrivia;
                const start = potentialStart + 2;
                token = scanner.scan();
                const end = scanner.getStartPos() - (isMultiLineCommentTrivia ? 2 : 0);
                const comment = contents.substring(start, end).trim();
                if (comment === 'nx-ignore-next-line') {
                    // reading till the end of the line
                    while (token === SyntaxKind.WhitespaceTrivia ||
                        token === SyntaxKind.NewLineTrivia) {
                        token = scanner.scan();
                    }
                    // ignore next line
                    while (token !== SyntaxKind.NewLineTrivia &&
                        token !== SyntaxKind.EndOfFileToken) {
                        token = scanner.scan();
                    }
                }
                break;
            }
            case SyntaxKind.RequireKeyword:
            case SyntaxKind.ImportKeyword: {
                token = scanner.scan();
                while (token === SyntaxKind.WhitespaceTrivia ||
                    token === SyntaxKind.NewLineTrivia) {
                    token = scanner.scan();
                }
                start = potentialStart;
                break;
            }
            case SyntaxKind.ExportKeyword: {
                token = scanner.scan();
                while (token === SyntaxKind.WhitespaceTrivia ||
                    token === SyntaxKind.NewLineTrivia) {
                    token = scanner.scan();
                }
                if (token === SyntaxKind.OpenBraceToken ||
                    token === SyntaxKind.AsteriskToken) {
                    start = potentialStart;
                }
                break;
            }
            case SyntaxKind.StringLiteral: {
                if (start !== null) {
                    token = scanner.scan();
                    if (token === SyntaxKind.CloseParenToken) {
                        token = scanner.scan();
                    }
                    const end = scanner.getStartPos();
                    statements.push(contents.substring(start, end));
                    start = null;
                }
                else {
                    token = scanner.scan();
                }
                break;
            }
            default: {
                token = scanner.scan();
            }
        }
    }
    return statements.join('\n');
}
exports.stripSourceCode = stripSourceCode;
//# sourceMappingURL=strip-source-code.js.map