buildsystem_sanity_check: script to save deps resolution variables

Add a script saving all applications and boards dependency resolution
variables and also aggregated files to compare between both dependencies
handling.

It is slow but should dump everything.

dist/tools/buildsystem_sanity_check/save_all_dependencies_resolution_variables.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+#
+# Copyright (C) 2019 Freie Universität Berlin
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+#
+
+# Script to save all the dependencies resolution variables for both normal and
+# in `info-boards-supported` resolution.
+#
+# The script takes a long time
+#
+# @author: Gaëtan Harter <gaetan.harter@fu-berlin.de>
+
+: "${RIOTBASE:="$(cd "$(dirname "$0")/../../../" || exit; pwd)"}"
+
+usage() {
+    echo "Usage: $0 <output_directory>"
+}
+
+
+applications() {
+    make --no-print-directory -C "${RIOTBASE}" info-applications
+}
+
+
+boards() {
+    make --no-print-directory -C "${RIOTBASE}" info-boards
+}
+
+
+function info_deps_variables_application() {
+    local application="$1"
+    local output_dir="$2/${application}"
+
+    DEPENDENCY_DEBUG=1 DEPENDENCY_DEBUG_OUTPUT_DIR="${output_dir}/info-global" make --no-print-directory -C "${RIOTBASE}/${application}" info-boards-supported >/dev/null
+    for board in $(boards)
+    do
+        DEPENDENCY_DEBUG_OUTPUT_DIR="${output_dir}/info" BOARD="${board}" make --no-print-directory -C "${RIOTBASE}/${application}" dependency-debug >/dev/null
+    done
+}
+
+
+main() {
+    if [[ $# -ne 1 ]]; then
+        usage
+        exit 1
+    fi
+    local output_dir
+
+    # No 'realpath' in mac by default…
+    output_dir=$(python -c 'import os.path; print(os.path.abspath("'"$1"'"))')
+
+    for app in $(applications)
+    do
+        echo "Evaluating ${app}" >&2
+        info_deps_variables_application "${app}" "${output_dir}"
+    done
+
+    # Generate the aggregated files to simplify comparing both parsing
+    find "${output_dir}" -type f -name 'dependencies_info_*' | sort | xargs cat > "${output_dir}"/deps_info
+    find "${output_dir}" -type f -name 'dependencies_info-boards-supported_*' | sort | xargs cat > ${output_dir}/deps_info-boards-supported
+}
+
+
+if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
+    main "$@"
+fi