Add copyright to all source files

[michaelgoin]

Every source file in the repository should contain the copyright block heading on top:

/*
* Copyright 2020 New Relic Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*/

This includes bash scripts (slightly different commenting style) and code examples. Does not include copy-paste templates.

NOTE: we want the Apache-2.0 license to land first so these are consistent and that license is the current active for the commit(s) applying these changes.

---

Useful Script

• Does not update non-JS files.
• May break when there’s a code directive that needs to be at the top.
• May need additional modifications for a particular repository.
• Run git ls-files | grep '\.js$' | grep -Ev '(.eslintrc|^newrelic)' to see list of files

tmp=$(mktemp)   # Create a temporary file
trap "rm -f $tmp; exit 1" 0 1 2 3 13 15

header="/*
 * Copyright 2020 New Relic Corporation. All rights reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
"

for file in $(git ls-files | grep '\.js$' | grep -Ev '(.eslintrc|^newrelic)')
do
    {
    echo -e "$header"
    cat $file
    } > $tmp
    mv $tmp $file
    echo $file
done

rm -f $tmp
trap 0