Keyword replace mappings (# / @) in configs don't support concatenating arrays

Description

Provide a clear and concise description of the issue, including what you expected to happen.

Placeholders ##x## or @@x@@ don’t support concatenating arrays. Sometimes you would like to concatenate arrays, e.g. allowed callback URLs, logout URLs or web origins. For example having base/global allowed URLs defined, and then adding to them for all clients/applications.

config.json

{
	"AUTH0_KEYWORD_REPLACE_MAPPINGS": {
		  "GLOBAL_WEB_ORIGINS": [
			"http://local.me:8080",
			"http://localhost",
			"http://localhost:3000"
		  ]
	}
}

def/clients/A.json

Either ##:

{
    "web_origins": [
        "##GLOBAL_WEB_ORIGINS##",
        "http://a.foo.com",
        "https://a.foo.com"
    ]
}

or @@

{
    "web_origins": [
        @@GLOBAL_WEB_ORIGINS@@,
        "http://a.foo.com",
        "https://a.foo.com"
    ]
}

Expected result:

{
    "web_origins": [
        "http://local.me:8080",
        "http://localhost",
        "http://localhost:3000",
        "http://a.foo.com",
        "https://a.foo.com"
    ]
}

Actual result:

I get an error for @@ but for ## I get the following:

{
    "web_origins": [
        "http://local.me:8080,http://localhost,http://localhost:3000",
        "http://a.foo.com",
        "https://a.foo.com"
    ]
}

Environment

Please provide the following:

• Version of this library used: 3.6.3
• Other relevant versions (language, server software, OS, browser): Node 8.15.1, Linux Mint, Ubuntu 18.04
• Other modules/plugins/libraries that might be involved: N/A

[willvedd]

@rodschuler Thanks for posting that workaround, seems like a tenable solution. Though it highlights areas of potential improvement for the variable replacement functionality in general.

[rodschuler]

I was having the same problem but was able to get it to work by doing the following.

In the yaml file I have

web_origins: [##APP_WEB_ORIGINS##]

and then in the config file you set it up similar to the following

"AUTH0_KEYWORD_REPLACE_MAPPINGS": { "APP_WEB_ORIGINS": "'https://a.foo.com','https://b.foo.com','https://c.foo.com'", }

basically using single quotes inside the variable used to replace the value.