#!/bin/bash

# Manage go-licenses version externally for CI
if [ "$CI" != "true" ]; then
    go install github.com/google/go-licenses/v2@latest
fi

# Verify go-licenses is available
if ! command -v go-licenses &> /dev/null; then
    echo "Error: go-licenses is not installed or not on PATH"
    exit 1
fi

# Setup temporary directory to collect updated third-party source code
export TEMPDIR="$(mktemp -d)"
trap "rm -fr ${TEMPDIR}" EXIT

# Clear third-party source code to avoid stale content
rm -rf third-party
mkdir -p third-party

for goos in linux darwin windows ; do
    # Note: we ignore warnings because we want the command to succeed, however the output should be checked
    #       for any new warnings, and potentially we may need to add license information.
    #
    #       Normally these warnings are packages containing non go code, which may or may not require explicit attribution,
    #       depending on the license.
    echo "Generating licenses for ${goos}..."
    GOOS="${goos}" go-licenses save ./... --save_path="${TEMPDIR}/${goos}" --force || echo "Ignore warnings"
    GOOS="${goos}" go-licenses report ./... --template .github/licenses.tmpl --ignore github.com/cli/cli > third-party-licenses.${goos}.md || echo "Ignore warnings"
    cp -fR "${TEMPDIR}/${goos}"/* third-party/
done

echo "Licenses generated for all platforms."
