Function convertFileToEsModule

test/fixtures/snapshot/typescript.js:152130–152155

@returns Whether we converted a `module.exports =` to a default export.

(sourceFile, checker, changes, target, quotePreference)

        }
        /** @returns Whether we converted a `module.exports =` to a default export. */
        function convertFileToEsModule(sourceFile, checker, changes, target, quotePreference) {
            var identifiers = { original: collectFreeIdentifiers(sourceFile), additional: new ts.Set() };
            var exports = collectExportRenames(sourceFile, checker, identifiers);
            convertExportsAccesses(sourceFile, exports, changes);
            var moduleExportsChangedToDefault = false;
            var useSitesToUnqualify;
            // Process variable statements first to collect use sites that need to be updated inside other transformations
            for (var _i = 0, _a = ts.filter(sourceFile.statements, ts.isVariableStatement); _i < _a.length; _i++) {
                var statement = _a[_i];
                var newUseSites = convertVariableStatement(sourceFile, statement, changes, checker, identifiers, target, quotePreference);
                if (newUseSites) {
                    ts.copyEntries(newUseSites, useSitesToUnqualify !== null && useSitesToUnqualify !== void 0 ? useSitesToUnqualify : (useSitesToUnqualify = new ts.Map()));
                }
            }
            // `convertStatement` will delete entries from `useSitesToUnqualify` when containing statements are replaced
            for (var _b = 0, _c = ts.filter(sourceFile.statements, function (s) { return !ts.isVariableStatement(s); }); _b < _c.length; _b++) {
                var statement = _c[_b];
                var moduleExportsChanged = convertStatement(sourceFile, statement, checker, changes, identifiers, target, exports, useSitesToUnqualify, quotePreference);
                moduleExportsChangedToDefault = moduleExportsChangedToDefault || moduleExportsChanged;
            }
            // Remaining use sites can be changed directly
            useSitesToUnqualify === null || useSitesToUnqualify === void 0 ? void 0 : useSitesToUnqualify.forEach(function (replacement, original) {
                changes.replaceNode(sourceFile, original, replacement);
            });
            return moduleExportsChangedToDefault;
        }
        function collectExportRenames(sourceFile, checker, identifiers) {
            var res = new ts.Map();
            forEachExportReference(sourceFile, function (node) {