mapping Xml File in Magento 2

Question

I am trying to map xml file in magento 2 while working on new module declaration through this command

 bin/magento dev:urn-catalog:generate .idea/misc.xml

the directory is (through pwd command)

/opt/lampp/htdocs/magento

at first it shows me this error

cache_dir "/opt/lampp/htdocs/magento/var/cache/" is not writable

So I have launched this command

chmod -R -v 777 var/cache

It shows me now this

 There are no commands defined in the "dev:urn-catalog" namespace. 

Answer 1

i notice that you were missing the required argument ide

you can refer the devdocs here for this command

its supposed to be

bin/magento dev:urn-catalog:generate [--ide IDE] [--] <path>

In case of PHP Storm which is the only IDE supported as if now

bin/magento dev:urn-catalog:generate --ide phpstorm .idea/misc.xml