fix: deduplicate commands

Author: mdonnalley

package.json

@@ -7,8 +7,10 @@
   "dependencies": {
     "@salesforce/command": "^5.2.6",
     "@salesforce/core": "^3.25.0",
+    "@types/lodash.uniqby": "^4.7.7",
     "chalk": "^3.0.0",
     "handlebars": "4.7.7",
+    "lodash.uniqby": "^4.7.0",
     "shelljs": "^0.8.5",
     "tslib": "^1"
   },

src/commands/commandreference/generate.ts

@@ -17,6 +17,9 @@ import { Ditamap } from '../../ditamap/ditamap';
 import { Docs } from '../../docs';
 import { events, mergeDeep } from '../../utils';
 
+// eslint-disable-next-line @typescript-eslint/no-var-requires
+const uniqBy = require('lodash.uniqby');
+
 // Initialize Messages with the current plugin directory
 Messages.importMessagesDirectory(__dirname);
 
@@ -176,7 +179,8 @@ export default class CommandReferenceGenerate extends SfdxCommand {
         return Object.assign({} as JsonMap, cmd);
       }
     });
-    return Promise.all(promises);
+    const commands = await Promise.all(promises);
+    return uniqBy(commands, 'id');
   }
 
   private async loadCommand(command) {

yarn.lock

@@ -1396,6 +1396,13 @@
   dependencies:
     "@types/node" "*"
 
+"@types/lodash.uniqby@^4.7.7":
+  version "4.7.7"
+  resolved "https://registry.yarnpkg.com/@types/lodash.uniqby/-/lodash.uniqby-4.7.7.tgz#48dbb652c41cc8fb30aa61a44174368081835ab5"
+  integrity sha512-sv2g6vkCIvEUsK5/Vq17haoZaisfj2EWW8mP7QWlnKi6dByoNmeuHDDXHR7sabuDqwO4gvU7ModIL22MmnOocg==
+  dependencies:
+    "@types/lodash" "*"
+
 "@types/lodash@*":
   version "4.14.184"
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.184.tgz#23f96cd2a21a28e106dc24d825d4aa966de7a9fe"
@@ -6225,7 +6232,7 @@ lodash.uniq@~4.5.0:
 lodash.uniqby@^4.7.0:
   version "4.7.0"
   resolved "https://registry.yarnpkg.com/lodash.uniqby/-/lodash.uniqby-4.7.0.tgz#d99c07a669e9e6d24e1362dfe266c67616af1302"
-  integrity sha1-2ZwHpmnp5tJOE2Lf4mbGdhavEwI=
+  integrity sha512-e/zcLx6CSbmaEgFHCA7BnoQKyCtKMxnuWrJygbwPs/AIn+IMKl66L8/s+wBUn5LRw2pZx3bUHibiV1b6aTWIww==
 
 lodash.without@~4.4.0:
   version "4.4.0"