Unable to install Cordova plugin barcode Phonegap (mac) - cordova-plugins

Question

I'm super new to cordova and phonegap. I need to install the Cordova plugin barcodescanner and I have tried to do so through the Terminal (mac) with the following line:
cordova plugin add cordova-plugin-barcodescanner as specified in this document.
However, I get an error that I can not solve. I've read many other posts, and haven't found a solution for my case.
My error:
(node:1721) UnhandledPromiseRejectionWarning: CordovaError: Cannot
find plugin.xml for plugin "cordova-plugin-barcodescanner". Please
try adding it again.
at new PluginInfo
(/usr/local/lib/node_modules/cordova/node_modules/cordova-
common/src/PluginInfo/PluginInfo.js:367:15)
at PluginInfoProvider.get
(/usr/local/lib/node_modules/cordova/node_modules/cordova-
common/src/PluginInfo/PluginInfoProvider.js:35:32)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/src/plugman/fetch.js:177:51
at _fulfilled
(/usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/node_modules/q/q.js:787:54)
at self.promiseDispatch.done
(/usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/node_modules/q/q.js:816:30)
at Promise.promise.promiseDispatch
(/usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/node_modules/q/q.js:749:13)
at /usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/node_modules/q/q.js:509:49
at flush (/usr/local/lib/node_modules/cordova/node_modules/cordova-
lib/node_modules/q/q.js:108:17)
at _combinedTickCallback (internal/process/next_tick.js:131:7)
at process._tickCallback (internal/process/next_tick.js:180:9)
(node:1721) UnhandledPromiseRejectionWarning: Unhandled promise
rejection. This error originated either by throwing inside of an
async function without a catch block, or by rejecting a promise
which
was not handled with .catch(). (rejection id: 1)
(node:1721) [DEP0018] DeprecationWarning: Unhandled promise
rejections
are deprecated. In the future, promise rejections that are not
handled
will terminate the Node.js process with a non-zero exit code.
These are my specs:
iOS: 10.13.4
Phonegap: 0.4.5
Thanks! :)

Answer 1

https://github.com/hypery2k/cordova-barcodescanner-plugin Try to use full url for installing plugin.
or
2.Set <plugin name="cordova-plugin-barcodescanner" spec="0.7.4" /> to config.xml and try run cordova plugin add cordova-plugin-barcodescanner with your cmd.
If it doesn't work try to run command npm install cordova-plugin-barcodescanner. (if your command already add some files to plugin folder, remove it and run it again.)
Check the path you are trying to install plugin, it must be something like C:/Desktop/Application/www/plugin/
Be sure that your config.xml have:
<config-file target="AndroidManifest.xml" parent="/*" mode="merge">
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
</config-file>

Answer 2

Ok, I figured out after many days and trials.
Basically what I did was create a new project from scratch, using CLI. Then I followed step by step this documentation. When I got to the "plugin" section, I added the plugin I wanted with the following line:
cordova plugin add cordova-plugin-barcodescanner
Hope this helps other people.
Cheers!