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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = nextTransformSsg;
- exports.EXPORT_NAME_GET_SERVER_PROPS = exports.EXPORT_NAME_GET_STATIC_PATHS = exports.EXPORT_NAME_GET_STATIC_PROPS = void 0;
- var _constants = require("../../../lib/constants");
- var _constants1 = require("../../../shared/lib/constants");
- function nextTransformSsg({ types: t }) {
- function getIdentifier(path) {
- const parentPath = path.parentPath;
- if (parentPath.type === "VariableDeclarator") {
- const pp = parentPath;
- const name = pp.get("id");
- return name.node.type === "Identifier" ? name : null;
- }
- if (parentPath.type === "AssignmentExpression") {
- const pp = parentPath;
- const name = pp.get("left");
- return name.node.type === "Identifier" ? name : null;
- }
- if (path.node.type === "ArrowFunctionExpression") {
- return null;
- }
- return path.node.id && path.node.id.type === "Identifier" ? path.get("id") : null;
- }
- function isIdentifierReferenced(ident) {
- const b = ident.scope.getBinding(ident.node.name);
- if (b == null ? void 0 : b.referenced) {
- // Functions can reference themselves, so we need to check if there's a
- // binding outside the function scope or not.
- if (b.path.type === "FunctionDeclaration") {
- return !b.constantViolations.concat(b.referencePaths)// Check that every reference is contained within the function:
- .every((ref)=>ref.findParent((p)=>p === b.path));
- }
- return true;
- }
- return false;
- }
- function markFunction(path, state) {
- const ident = getIdentifier(path);
- if ((ident == null ? void 0 : ident.node) && isIdentifierReferenced(ident)) {
- state.refs.add(ident);
- }
- }
- function markImport(path, state) {
- const local = path.get("local");
- if (isIdentifierReferenced(local)) {
- state.refs.add(local);
- }
- }
- return {
- visitor: {
- Program: {
- enter (path, state) {
- state.refs = new Set();
- state.isPrerender = false;
- state.isServerProps = false;
- state.done = false;
- path.traverse({
- VariableDeclarator (variablePath, variableState) {
- if (variablePath.node.id.type === "Identifier") {
- const local = variablePath.get("id");
- if (isIdentifierReferenced(local)) {
- variableState.refs.add(local);
- }
- } else if (variablePath.node.id.type === "ObjectPattern") {
- const pattern = variablePath.get("id");
- const properties = pattern.get("properties");
- properties.forEach((p)=>{
- const local = p.get(p.node.type === "ObjectProperty" ? "value" : p.node.type === "RestElement" ? "argument" : function() {
- throw new Error("invariant");
- }());
- if (isIdentifierReferenced(local)) {
- variableState.refs.add(local);
- }
- });
- } else if (variablePath.node.id.type === "ArrayPattern") {
- const pattern = variablePath.get("id");
- const elements = pattern.get("elements");
- elements.forEach((e)=>{
- var ref, ref1;
- let local;
- if (((ref = e.node) == null ? void 0 : ref.type) === "Identifier") {
- local = e;
- } else if (((ref1 = e.node) == null ? void 0 : ref1.type) === "RestElement") {
- local = e.get("argument");
- } else {
- return;
- }
- if (isIdentifierReferenced(local)) {
- variableState.refs.add(local);
- }
- });
- }
- },
- FunctionDeclaration: markFunction,
- FunctionExpression: markFunction,
- ArrowFunctionExpression: markFunction,
- ImportSpecifier: markImport,
- ImportDefaultSpecifier: markImport,
- ImportNamespaceSpecifier: markImport,
- ExportNamedDeclaration (exportNamedPath, exportNamedState) {
- const specifiers = exportNamedPath.get("specifiers");
- if (specifiers.length) {
- specifiers.forEach((s)=>{
- if (isDataIdentifier(t.isIdentifier(s.node.exported) ? s.node.exported.name : s.node.exported.value, exportNamedState)) {
- s.remove();
- }
- });
- if (exportNamedPath.node.specifiers.length < 1) {
- exportNamedPath.remove();
- }
- return;
- }
- const decl = exportNamedPath.get("declaration");
- if (decl == null || decl.node == null) {
- return;
- }
- switch(decl.node.type){
- case "FunctionDeclaration":
- {
- const name = decl.node.id.name;
- if (isDataIdentifier(name, exportNamedState)) {
- exportNamedPath.remove();
- }
- break;
- }
- case "VariableDeclaration":
- {
- const inner = decl.get("declarations");
- inner.forEach((d)=>{
- if (d.node.id.type !== "Identifier") {
- return;
- }
- const name = d.node.id.name;
- if (isDataIdentifier(name, exportNamedState)) {
- d.remove();
- }
- });
- break;
- }
- default:
- {
- break;
- }
- }
- }
- }, state);
- if (!state.isPrerender && !state.isServerProps) {
- return;
- }
- const refs = state.refs;
- let count;
- function sweepFunction(sweepPath) {
- const ident = getIdentifier(sweepPath);
- if ((ident == null ? void 0 : ident.node) && refs.has(ident) && !isIdentifierReferenced(ident)) {
- ++count;
- if (t.isAssignmentExpression(sweepPath.parentPath) || t.isVariableDeclarator(sweepPath.parentPath)) {
- sweepPath.parentPath.remove();
- } else {
- sweepPath.remove();
- }
- }
- }
- function sweepImport(sweepPath) {
- const local = sweepPath.get("local");
- if (refs.has(local) && !isIdentifierReferenced(local)) {
- ++count;
- sweepPath.remove();
- if (sweepPath.parent.specifiers.length === 0) {
- sweepPath.parentPath.remove();
- }
- }
- }
- do {
- path.scope.crawl();
- count = 0;
- path.traverse({
- // eslint-disable-next-line no-loop-func
- VariableDeclarator (variablePath) {
- if (variablePath.node.id.type === "Identifier") {
- const local = variablePath.get("id");
- if (refs.has(local) && !isIdentifierReferenced(local)) {
- ++count;
- variablePath.remove();
- }
- } else if (variablePath.node.id.type === "ObjectPattern") {
- const pattern = variablePath.get("id");
- const beforeCount = count;
- const properties = pattern.get("properties");
- properties.forEach((p)=>{
- const local = p.get(p.node.type === "ObjectProperty" ? "value" : p.node.type === "RestElement" ? "argument" : function() {
- throw new Error("invariant");
- }());
- if (refs.has(local) && !isIdentifierReferenced(local)) {
- ++count;
- p.remove();
- }
- });
- if (beforeCount !== count && pattern.get("properties").length < 1) {
- variablePath.remove();
- }
- } else if (variablePath.node.id.type === "ArrayPattern") {
- const pattern = variablePath.get("id");
- const beforeCount = count;
- const elements = pattern.get("elements");
- elements.forEach((e)=>{
- var ref, ref2;
- let local;
- if (((ref = e.node) == null ? void 0 : ref.type) === "Identifier") {
- local = e;
- } else if (((ref2 = e.node) == null ? void 0 : ref2.type) === "RestElement") {
- local = e.get("argument");
- } else {
- return;
- }
- if (refs.has(local) && !isIdentifierReferenced(local)) {
- ++count;
- e.remove();
- }
- });
- if (beforeCount !== count && pattern.get("elements").length < 1) {
- variablePath.remove();
- }
- }
- },
- FunctionDeclaration: sweepFunction,
- FunctionExpression: sweepFunction,
- ArrowFunctionExpression: sweepFunction,
- ImportSpecifier: sweepImport,
- ImportDefaultSpecifier: sweepImport,
- ImportNamespaceSpecifier: sweepImport
- });
- }while (count);
- decorateSsgExport(t, path, state);
- }
- }
- }
- };
- }
- const EXPORT_NAME_GET_STATIC_PROPS = "getStaticProps";
- exports.EXPORT_NAME_GET_STATIC_PROPS = EXPORT_NAME_GET_STATIC_PROPS;
- const EXPORT_NAME_GET_STATIC_PATHS = "getStaticPaths";
- exports.EXPORT_NAME_GET_STATIC_PATHS = EXPORT_NAME_GET_STATIC_PATHS;
- const EXPORT_NAME_GET_SERVER_PROPS = "getServerSideProps";
- exports.EXPORT_NAME_GET_SERVER_PROPS = EXPORT_NAME_GET_SERVER_PROPS;
- const ssgExports = new Set([
- EXPORT_NAME_GET_STATIC_PROPS,
- EXPORT_NAME_GET_STATIC_PATHS,
- EXPORT_NAME_GET_SERVER_PROPS,
- // legacy methods added so build doesn't fail from importing
- // server-side only methods
- `unstable_getStaticProps`,
- `unstable_getStaticPaths`,
- `unstable_getServerProps`,
- `unstable_getServerSideProps`,
- ]);
- function decorateSsgExport(t, path, state) {
- const gsspName = state.isPrerender ? _constants1.STATIC_PROPS_ID : _constants1.SERVER_PROPS_ID;
- const gsspId = t.identifier(gsspName);
- const addGsspExport = (exportPath)=>{
- if (state.done) {
- return;
- }
- state.done = true;
- const [pageCompPath] = exportPath.replaceWithMultiple([
- t.exportNamedDeclaration(t.variableDeclaration(// We use 'var' instead of 'let' or 'const' for ES5 support. Since
- // this runs in `Program#exit`, no ES2015 transforms (preset env)
- // will be ran against this code.
- "var", [
- t.variableDeclarator(gsspId, t.booleanLiteral(true))
- ]), [
- t.exportSpecifier(gsspId, gsspId)
- ]),
- exportPath.node,
- ]);
- exportPath.scope.registerDeclaration(pageCompPath);
- };
- path.traverse({
- ExportDefaultDeclaration (exportDefaultPath) {
- addGsspExport(exportDefaultPath);
- },
- ExportNamedDeclaration (exportNamedPath) {
- addGsspExport(exportNamedPath);
- }
- });
- }
- const isDataIdentifier = (name, state)=>{
- if (ssgExports.has(name)) {
- if (name === EXPORT_NAME_GET_SERVER_PROPS) {
- if (state.isPrerender) {
- throw new Error(_constants.SERVER_PROPS_SSG_CONFLICT);
- }
- state.isServerProps = true;
- } else {
- if (state.isServerProps) {
- throw new Error(_constants.SERVER_PROPS_SSG_CONFLICT);
- }
- state.isPrerender = true;
- }
- return true;
- }
- return false;
- };
- //# sourceMappingURL=next-ssg-transform.js.map
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