file.json

//settings.json.config file
//... Rest of file
    "emeraldwalk.runonsave": {

        "commands": [
               {
                   "match": "\\.pug$",
                   "cmd": "pug ./ --doctype html --pretty"
               },
               {
                   "match": "\\.ejs$",
                   "cmd": "ejs-cli '*.ejs' --out dest/ --options options.json"
               }
        ]
    }