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bashawkexportsaucelabs

export adding extra characters

I am trying to get my tunnel ID from sauce labs... To get this I am doing the following:

SAUCE_TUNNELL_IDENTIFIER=$(curl https://saucelabs.com/rest/v1/myusername/tunnels -u myusername:mykey)

This returns ["my-tunnel-id"]

So I want to get rid of the [] and export my tunnel id..

Here is the export and removal of []

export SAUCE_TUNNELL_IDENTIFIER=$(echo $SAUCE_TUNNELL_IDENTIFIER | awk '{print substr($0, 2, length($0) -2)}')

When I do an export -p, I see it like this "\"my-tunnel-id\""

But if I just do an echo $SAUCE_TUNNELL_IDENTIFIER, I do not see the exta "\ in my variable. Where is this coming from? Also, any help making this into one better command would also be appreciated! :)

Solution

  • The server is returning a JSON array; you could use something like jq to extract just the single element in the array, but for something this simple, you can just use parameter expansion.

    $ SAUCE_TUNNELL_IDENTIFIER=$(curl https://saucelabs.com/rest/v1/myusername/tunnels -u myusername:mykey)
$ SAUCE_TUNNELL_IDENTIFIER=${SAUCE_TUNNELL_IDENTIFIER//[]\"[]}
$ echo "$SAUCE_TUNNELL_IDENTIFIER"
my-tunnel-id

    Update:

    I assumed the identifier could not contain brackets or quotes. A safer, though longer, alternative is to strip each outer character one by one.

    $ STI=$(curl ...)
$ STI=${STI#[}
$ STI=${STI#\"}
$ STI=${STI%]}
$ STI=${STI%\"}

    and at this point I may as well show how to use jq to do this:

    $ curl ... | jq -r '.[0]'
my-tunnel-id

    . represents the incoming JSON; [0] extracts the first element; -r tells jq to output the raw string instead of the quoted JSON string (my-tunnel-id instead of "my-tunnel-id").