Let package export maps take priority over normal resolution (#1781)

* Let package export maps take priority over normal resolution

* Update test snaps

* Re-update snaps

* await init

esinstall/src/index.ts

@@ -94,17 +94,6 @@ function resolveWebDependency(
   dep: string,
   {cwd, packageLookupFields}: {cwd: string; packageLookupFields: string[]},
 ): DependencyLoc {
-  // if dep points directly to a file within a package, return that reference.
-  // No other lookup required.
-  if (path.extname(dep) && !validatePackageName(dep).validForNewPackages) {
-    // For details on why we need to call fs.realpathSync.native here and other places, see
-    // https://github.com/snowpackjs/snowpack/pull/999.
-    const loc = fs.realpathSync.native(require.resolve(dep, {paths: [cwd]}));
-    return {
-      type: isJavaScript(loc) ? 'JS' : 'ASSET',
-      loc,
-    };
-  }
   // If dep is a path within a package (but without an extension), we first need
   // to check for an export map in the package.json. If one exists, resolve to it.
   const [packageName, packageEntrypoint] = parsePackageImportSpecifier(dep);
@@ -123,13 +112,25 @@ function resolveWebDependency(
           `Package "${packageName}" exists but package.json "exports" does not include entry for "./${packageEntrypoint}".`,
         );
       }
+      const loc = path.join(packageManifestLoc, '..', exportMapValue);
       return {
-        type: 'JS',
-        loc: path.join(packageManifestLoc, '..', exportMapValue),
+        type: isJavaScript(loc) ? 'JS' : 'ASSET',
+        loc,
       };
     }
   }
 
+  // if, no export map and dep points directly to a file within a package, return that reference.
+  if (path.extname(dep) && !validatePackageName(dep).validForNewPackages) {
+    // For details on why we need to call fs.realpathSync.native here and other places, see
+    // https://github.com/snowpackjs/snowpack/pull/999.
+    const loc = fs.realpathSync.native(require.resolve(dep, {paths: [cwd]}));
+    return {
+      type: isJavaScript(loc) ? 'JS' : 'ASSET',
+      loc,
+    };
+  }
+
   // Otherwise, resolve directly to the dep specifier. Note that this supports both
   // "package-name" & "package-name/some/path" where "package-name/some/path/package.json"
   // exists at that lower path, that must be used to resolve. In that case, export

esinstall/src/rollup-plugins/rollup-plugin-node-process-polyfill.ts

@@ -6,7 +6,7 @@ const PROCESS_MODULE_NAME = 'process';
 export function rollupPluginNodeProcessPolyfill(env = {}): Plugin {
   const injectPlugin = inject({
     process: PROCESS_MODULE_NAME,
-    include: ['*.js', '*.mjs', '*.cjs'],
+    include: /\.(cjs|js|jsx|mjs|ts|tsx)$/, // only target JavaScript files
   });
 
   return {

jest.config.js

@@ -1,6 +1,7 @@
 module.exports = {
   modulePathIgnorePatterns: [
     '<rootDir>/create-snowpack-app/app-template-', // don’t run tests intended as user examples
+    '<rootDir>/examples', // don’t run any tests in examples
     '<rootDir>/test/create-snowpack-app/test-install', // don’t run tests inside our mock create-snowpack-app install
   ],
   setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],

snowpack/src/scan-imports.ts

@@ -274,6 +274,7 @@ export async function scanImportsFromFiles(
   loadedFiles: SnowpackSourceFile[],
   config: SnowpackConfig,
 ): Promise<InstallTarget[]> {
+  await initESModuleLexer;
   return loadedFiles
     .filter((sourceFile) => !Buffer.isBuffer(sourceFile.contents)) // filter out binary files from import scanning
     .map((sourceFile) => parseFileForInstallTargets(sourceFile as SnowpackSourceFile<string>))

test/esinstall/export-maps/__snapshots__

@@ -2,23 +2,30 @@
 
 exports[`snowpack install export-maps: allFiles 1`] = `
 Array [
+  "@clevercloud/components/assets/backup.svg",
   "import-map.json",
   "preact.js",
+  "preact/hooks.js",
 ]
 `;
 
 exports[`snowpack install export-maps: cli output 1`] = `
 "[snowpack] ! installing dependencies...
 [snowpack] ✔ install complete!
 [snowpack]
-  ⦿ web_modules/     size       gzip       brotli
-    └─ preact.js    XXXX KB    XXXX KB    XXXX KB"
+  ⦿ web_modules/        size       gzip       brotli
+    ├─ preact.js    XXXX KB    XXXX KB    XXXX KB
+    └─ preact/hooks.js    XXXX KB    XXXX KB    XXXX KB"
 `;
 
+exports[`snowpack install export-maps: web_modules/@clevercloud/components/assets/backup.svg 1`] = `"<?xml version=\\"1.0\\" encoding=\\"UTF-8\\" standalone=\\"no\\"?><svg xmlns=\\"http://www.w3.org/2000/svg\\" width=\\"100\\" height=\\"100\\" fill-rule=\\"evenodd\\" clip-rule=\\"evenodd\\" viewBox=\\"0 0 333 333\\"><g transform=\\"translate(14.497207,92.999354)\\"><circle r=\\"109.89\\" style=\\"opacity:1;fill:#f19175;fill-opacity:1;stroke:none;stroke-width:23.30895042;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:normal\\" cx=\\"170.819\\" cy=\\"73.499\\"/><path d=\\"M170.819-69.69A143.19 143.19 0 0027.902 65.795h-37.905l54.282 83.64 54.281-83.64H61.312A109.89 109.89 0 01170.82-36.39 109.89 109.89 0 01280.709 73.5a109.89 109.89 0 01-109.89 109.89 109.89 109.89 0 01-66.848-22.842L84.434 187.54a143.19 143.19 0 0086.385 29.15A143.19 143.19 0 00314.009 73.5a143.19 143.19 0 00-143.19-143.19z\\" style=\\"opacity:1;fill:#000;fill-opacity:1;stroke:none;stroke-width:6.99968481;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:normal\\"/><path d=\\"M153.674-3.818v87.211l58.32 33.677 17.145-29.697-41.176-23.771v-67.42z\\" style=\\"opacity:1;fill:#000;fill-opacity:1;stroke:none;stroke-width:23.30895042;stroke-linecap:butt;stroke-linejoin:round;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:normal\\"/></g></svg>"`;
+
 exports[`snowpack install export-maps: web_modules/import-map.json 1`] = `
 "{
   \\"imports\\": {
-    \\"preact\\": \\"./preact.js\\"
+    \\"@clevercloud/components/assets/backup.svg\\": \\"./@clevercloud/components/assets/backup.svg\\",
+    \\"preact\\": \\"./preact.js\\",
+    \\"preact/hooks\\": \\"./preact/hooks.js\\"
   }
 }"
 `;
@@ -27,3 +34,9 @@ exports[`snowpack install export-maps: web_modules/preact.js 1`] = `
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 `;
+
+exports[`snowpack install export-maps: web_modules/preact/hooks.js 1`] = `
+"import { options as n } from '../preact.js';
+var t,u,r,o=0,i=[],c=n.__b,f=n.__r,e=n.diffed,a=n.__c,v=n.unmount;function m(t,r){n.__h&&n.__h(u,t,o||r),o=0;var i=u.__H||(u.__H={__:[],__h:[]});return t>=i.__.length&&i.__.push({}),i.__[t]}function l(n){return o=1,p(w,n)}function p(n,r,o){var i=m(t++,2);return i.t=n,i.__c||(i.__=[o?o(r):w(void 0,r),function(n){var t=i.t(i.__[0],n);i.__[0]!==t&&(i.__=[t,i.__[1]],i.__c.setState({}));}],i.__c=u),i.__}function y(r,o){var i=m(t++,3);!n.__s&&k(i.__H,o)&&(i.__=r,i.__H=o,u.__H.__h.push(i));}function h(r,o){var i=m(t++,4);!n.__s&&k(i.__H,o)&&(i.__=r,i.__H=o,u.__h.push(i));}function s(n){return o=5,d(function(){return {current:n}},[])}function _(n,t,u){o=6,h(function(){\\"function\\"==typeof n?n(t()):n&&(n.current=t());},null==u?u:u.concat(n));}function d(n,u){var r=m(t++,7);return k(r.__H,u)&&(r.__=n(),r.__H=u,r.__h=n),r.__}function A(n,t){return o=8,d(function(){return n},t)}function F(n){var r=u.context[n.__c],o=m(t++,9);return o.__c=n,r?(null==o.__&&(o.__=!0,r.sub(u)),r.props.value):n.__}function T(t,u){n.useDebugValue&&n.useDebugValue(u?u(t):t);}function q(n){var r=m(t++,10),o=l();return r.__=n,u.componentDidCatch||(u.componentDidCatch=function(n){r.__&&r.__(n),o[1](n);}),[o[0],function(){o[1](void 0);}]}function x(){i.forEach(function(t){if(t.__P)try{t.__H.__h.forEach(g),t.__H.__h.forEach(j),t.__H.__h=[];}catch(u){t.__H.__h=[],n.__e(u,t.__v);}}),i=[];}n.__b=function(n){u=null,c&&c(n);},n.__r=function(n){f&&f(n),t=0;var r=(u=n.__c).__H;r&&(r.__h.forEach(g),r.__h.forEach(j),r.__h=[]);},n.diffed=function(t){e&&e(t);var o=t.__c;o&&o.__H&&o.__H.__h.length&&(1!==i.push(o)&&r===n.requestAnimationFrame||((r=n.requestAnimationFrame)||function(n){var t,u=function(){clearTimeout(r),b&&cancelAnimationFrame(t),setTimeout(n);},r=setTimeout(u,100);b&&(t=requestAnimationFrame(u));})(x)),u=void 0;},n.__c=function(t,u){u.some(function(t){try{t.__h.forEach(g),t.__h=t.__h.filter(function(n){return !n.__||j(n)});}catch(r){u.some(function(n){n.__h&&(n.__h=[]);}),u=[],n.__e(r,t.__v);}}),a&&a(t,u);},n.unmount=function(t){v&&v(t);var u=t.__c;if(u&&u.__H)try{u.__H.__.forEach(g);}catch(t){n.__e(t,u.__v);}};var b=\\"function\\"==typeof requestAnimationFrame;function g(n){var t=u;\\"function\\"==typeof n.__c&&n.__c(),u=t;}function j(n){var t=u;n.__c=n.__(),u=t;}function k(n,t){return !n||n.length!==t.length||t.some(function(t,u){return t!==n[u]})}function w(n,t){return \\"function\\"==typeof t?t(n):t}
+export { A as useCallback, F as useContext, T as useDebugValue, y as useEffect, q as useErrorBoundary, _ as useImperativeHandle, h as useLayoutEffect, d as useMemo, p as useReducer, s as useRef, l as useState };"
+`;

test/esinstall/export-maps/package.json

@@ -7,14 +7,17 @@
   },
   "snowpack": {
     "install": [
-      "preact"
+      "preact",
+      "preact/hooks",
+      "@clevercloud/components/assets/backup.svg"
     ],
     "buildOptions": {
       "minify": false
     }
   },
   "dependencies": {
-    "preact": "^10.4.6"
+    "preact": "^10.4.6",
+    "@clevercloud/components": "4.1.0-beta.5"
   },
   "devDependencies": {
     "snowpack": "^2.14.3"