Check license of dependencies file for changes (#7108)

scripts/check-deps.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+
+tmpdir="$(mktemp -d)"
+
+cleanup() {
+	rm -rf "$tmpdir"
+}
+trap cleanup EXIT
+
+targets="$(go tool dist list)"
+
+for target in ${targets}; do
+	# only check platforms we build for
+	case "${target}" in
+		linux/*) ;;
+		windows/*) ;;
+		freebsd/*) ;;
+		darwin/*) ;;
+		*) continue;;
+	esac
+
+	GOOS=${target%%/*} GOARCH=${target##*/} \
+		go list -deps -f '{{with .Module}}{{.Path}}{{end}}' ./cmd/telegraf/ >> "${tmpdir}/golist"
+done
+
+for dep in $(LC_ALL=C sort -u "${tmpdir}/golist"); do
+	case "${dep}" in
+		# ignore ourselves
+		github.com/influxdata/telegraf) continue;;
+
+		# dependency is replaced in go.mod
+		github.com/satori/go.uuid) continue;;
+
+		# go-autorest has a single license for all sub modules
+		github.com/Azure/go-autorest/autorest)
+			dep=github.com/Azure/go-autorest;;
+		github.com/Azure/go-autorest/*)
+			continue;;
+	esac
+
+	# Remove single and double digit version from path; these are generally not
+	# actual parts of the path and instead indicate a branch or tag.
+	#   example: github.com/influxdata/go-syslog/v2 -> github.com/influxdata/go-syslog
+	dep="${dep%%/v[0-9]}"
+	dep="${dep%%/v[0-9][0-9]}"
+
+	echo "${dep}" >> "${tmpdir}/actual"
+done
+
+grep '^-' docs/LICENSE_OF_DEPENDENCIES.md | grep -v github.com/DataDog/datadog-agent | cut -f 2 -d' ' > "${tmpdir}/expected"
+diff -U0 "${tmpdir}/expected" "${tmpdir}/actual"