Lint: error if imported value not found in module

.eslintrc.js

@@ -10,7 +10,8 @@ module.exports = {
   },
 
   "plugins": [
-    "chai-friendly"
+    "chai-friendly",
+    "import"
   ],
 
   "globals": { // TODO are all these necessary?
@@ -326,7 +327,8 @@ module.exports = {
     "no-unused-vars": "error",
 
     // eslint-plugin-import rules:
-    "import/extensions": "never",
+    "import/named": "error",
+    "import/extensions": "error",
     "import/no-extraneous-dependencies": ["error", {"devDependencies": true, "optionalDependencies": false, "peerDependencies": false}],
     "import/no-unassigned-import": "error",
 

src/crypto/cipher/index.js

@@ -5,7 +5,7 @@
  */
 
 import aes from './aes';
-import { DES, TripleDES } from './des.js';
+import { DES, TripleDES } from './des';
 import CAST5 from './cast5';
 import TF from './twofish';
 import BF from './blowfish';

src/crypto/public_key/elliptic/curves.js

@@ -21,7 +21,7 @@
  * @private
  */
 
-import nacl from '@openpgp/tweetnacl/nacl-fast-light.js';
+import nacl from '@openpgp/tweetnacl/nacl-fast-light';
 import { getRandomBytes } from '../../random';
 import enums from '../../../enums';
 import util from '../../../util';

src/crypto/public_key/elliptic/ecdh.js

@@ -21,7 +21,7 @@
  * @private
  */
 
-import nacl from '@openpgp/tweetnacl/nacl-fast-light.js';
+import nacl from '@openpgp/tweetnacl/nacl-fast-light';
 import { Curve, jwkToRawPublic, rawPublicToJWK, privateToJWK, validateStandardParams } from './curves';
 import * as aesKW from '../../aes_kw';
 import { getRandomBytes } from '../../random';

src/crypto/public_key/elliptic/eddsa.js

@@ -22,7 +22,7 @@
  */
 
 import sha512 from 'hash.js/lib/hash/sha/512';
-import nacl from '@openpgp/tweetnacl/nacl-fast-light.js';
+import nacl from '@openpgp/tweetnacl/nacl-fast-light';
 import util from '../../../util';
 import enums from '../../../enums';
 import hash from '../../hash';

src/crypto/public_key/index.js

@@ -4,7 +4,7 @@
  * @private
  */
 
-import nacl from '@openpgp/tweetnacl/nacl-fast-light.js';
+import nacl from '@openpgp/tweetnacl/nacl-fast-light';
 import * as rsa from './rsa';
 import * as elgamal from './elgamal';
 import * as elliptic from './elliptic';

src/encoding/armor.js

@@ -16,8 +16,8 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
 import * as stream from '@openpgp/web-stream-tools';
-import * as base64 from './base64.js';
-import enums from '../enums.js';
+import * as base64 from './base64';
+import enums from '../enums';
 import util from '../util';
 import defaultConfig from '../config';
 

src/key/index.js

@@ -14,9 +14,9 @@ import {
   createSignaturePacket
 } from './helper';
 
-import PrivateKey from './private_key.js';
-import PublicKey from './public_key.js';
-import Subkey from './subkey.js';
+import PrivateKey from './private_key';
+import PublicKey from './public_key';
+import Subkey from './subkey';
 
 export {
   readKey,

src/packet/all_packets.js

@@ -4,20 +4,20 @@
  * @private
  */
 
-export { default as CompressedDataPacket } from './compressed_data.js';
-export { default as SymEncryptedIntegrityProtectedDataPacket } from './sym_encrypted_integrity_protected_data.js';
-export { default as AEADEncryptedDataPacket } from './aead_encrypted_data.js';
-export { default as PublicKeyEncryptedSessionKeyPacket } from './public_key_encrypted_session_key.js';
-export { default as SymEncryptedSessionKeyPacket } from './sym_encrypted_session_key.js';
-export { default as LiteralDataPacket } from './literal_data.js';
-export { default as PublicKeyPacket } from './public_key.js';
-export { default as SymmetricallyEncryptedDataPacket } from './symmetrically_encrypted_data.js';
-export { default as MarkerPacket } from './marker.js';
-export { default as PublicSubkeyPacket } from './public_subkey.js';
-export { default as UserAttributePacket } from './user_attribute.js';
-export { default as OnePassSignaturePacket } from './one_pass_signature.js';
-export { default as SecretKeyPacket } from './secret_key.js';
-export { default as UserIDPacket } from './userid.js';
-export { default as SecretSubkeyPacket } from './secret_subkey.js';
-export { default as SignaturePacket } from './signature.js';
-export { default as TrustPacket } from './trust.js';
+export { default as CompressedDataPacket } from './compressed_data';
+export { default as SymEncryptedIntegrityProtectedDataPacket } from './sym_encrypted_integrity_protected_data';
+export { default as AEADEncryptedDataPacket } from './aead_encrypted_data';
+export { default as PublicKeyEncryptedSessionKeyPacket } from './public_key_encrypted_session_key';
+export { default as SymEncryptedSessionKeyPacket } from './sym_encrypted_session_key';
+export { default as LiteralDataPacket } from './literal_data';
+export { default as PublicKeyPacket } from './public_key';
+export { default as SymmetricallyEncryptedDataPacket } from './symmetrically_encrypted_data';
+export { default as MarkerPacket } from './marker';
+export { default as PublicSubkeyPacket } from './public_subkey';
+export { default as UserAttributePacket } from './user_attribute';
+export { default as OnePassSignaturePacket } from './one_pass_signature';
+export { default as SecretKeyPacket } from './secret_key';
+export { default as UserIDPacket } from './userid';
+export { default as SecretSubkeyPacket } from './secret_subkey';
+export { default as SignaturePacket } from './signature';
+export { default as TrustPacket } from './trust';

src/packet/signature.js

@@ -17,7 +17,7 @@
 
 import * as stream from '@openpgp/web-stream-tools';
 import { readSimpleLength, UnsupportedError, writeSimpleLength } from './packet';
-import KeyID from '../type/keyid.js';
+import KeyID from '../type/keyid';
 import crypto from '../crypto';
 import enums from '../enums';
 import util from '../util';

src/type/keyid.js

@@ -20,7 +20,7 @@
  * @private
  */
 
-import util from '../util.js';
+import util from '../util';
 
 /**
  * Implementation of type key id

src/type/s2k.js

@@ -30,8 +30,8 @@
 
 import defaultConfig from '../config';
 import crypto from '../crypto';
-import enums from '../enums.js';
-import util from '../util.js';
+import enums from '../enums';
+import util from '../util';
 
 class S2K {
   /**