Guided Installer is appending unnecessary labels to config file

[neilpdx]

Description

Every time the Guided Installer is run, it appends <labels>nr_deployed_by:newrelic-cli</labels> to the newrelic.config file for the .NET agent.

After many installs, the config file could look like this:

<labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels> <labels>nr_deployed_by:newrelic-cli</labels></configuration>

This could potentially cause issues over time and makes the config file longer than it should be and makes it harder to read/parse.

Go Version

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Current behavior

The label is added for every install.

Expected behavior

The label should only be added to the config file once.

Steps To Reproduce

Run the guided installer and note that <labels>nr_deployed_by:newrelic-cli</labels> is appended right before the closing </configuration> tag.

Run the guided installer again and note that a duplicate label is appended.

Debug Output (if applicable)

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Additional Context

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References or Related Issues

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