1 files changed, 139 insertions, 0 deletions
diff --git a/modules/check-outbound-license.py b/modules/check-outbound-license.py
new file mode 100755
index 00000000..b8c1ef23
--- /dev/null
+++ b/modules/check-outbound-license.py
@@ -0,0 +1,139 @@
+#!/usr/bin/env python3
+# SPDX-FileCopyrightText: 2020 Andreas Cord-Landwehr <cordlandwehr@kde.org>
+# SPDX-License-Identifier: BSD-3-Clause
+
+# key    : outbound license identifier
+# values : list of acceptable licenses that are compatible with outbound license
+compatibilityMatrix = {
+    "MIT": [
+        "CC0-1.0",
+        "MIT"],
+    "BSD-2-Clause": [
+        "CC0-1.0",
+        "MIT",
+        "BSD-2-Clause"],
+    "BSD-3-Clause": [
+        "CC0-1.0",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause"],
+    "LGPL-2.0-only": [
+        "CC0-1.0",
+        "LGPL-2.0-only",
+        "LGPL-2.0-or-later",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause",
+        "bzip2-1.0.6"],
+    "LGPL-2.1-only": [
+        "CC0-1.0",
+        "LGPL-2.0-or-later",
+        "LGPL-2.1-only",
+        "LGPL-2.1-or-later",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause",
+        "bzip2-1.0.6"],
+    "LGPL-3.0-only": [
+        "CC0-1.0",
+        "LGPL-2.0-or-later",
+        "LGPL-2.1-or-later",
+        "LGPL-3.0-only",
+        "LGPL-3.0-or-later",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause",
+        "bzip2-1.0.6"],
+    "GPL-2.0-only": [
+        "CC0-1.0",
+        "LGPL-2.0-only",
+        "LGPL-2.1-only",
+        "LGPL-2.0-or-later",
+        "LGPL-2.1-or-later",
+        "GPL-2.0-only",
+        "GPL-2.0-or-later",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause",
+        "bzip2-1.0.6"],
+    "GPL-3.0-only": [
+        "CC0-1.0",
+        "LGPL-2.0-or-later",
+        "LGPL-2.1-or-later",
+        "LGPL-3.0-only",
+        "LGPL-3.0-or-later",
+        "GPL-2.0-or-later",
+        "GPL-3.0-only",
+        "GPL-3.0-or-later",
+        "MIT",
+        "BSD-2-Clause",
+        "BSD-3-Clause",
+        "bzip2-1.0.6"]
+}
+
+def check_outbound_license(license, files, spdxDictionary):
+    """
+    Asserts that the list of source files @p files, when combined into
+    a library or executable, can be delivered under the combined license @p license .
+    """
+    print("Checking Target License: " + license)
+    if not license in compatibilityMatrix:
+        print("Error: unknown license selected")
+        return False
+
+    allLicensesAreCompatible = True
+
+    for sourceFile in files:
+        compatible = False
+        sourceFileStripped = sourceFile.strip()
+        for fileLicense in spdxDictionary[sourceFileStripped]:
+            if fileLicense in compatibilityMatrix[license]:
+                compatible = True
+                print("OK " + sourceFileStripped + " : " + fileLicense)
+        if not compatible:
+            allLicensesAreCompatible = False
+            print("-- " + sourceFileStripped + " : ( " + ", ".join([str(i) for i in spdxDictionary[sourceFileStripped]]) + " )")
+    return allLicensesAreCompatible
+
+if __name__ == '__main__':
+    print("Parsing SPDX BOM file")
+    import sys
+    import argparse
+
+    # parse commands
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-l", "--license", help="set outbound license to test")
+    parser.add_argument("-s", "--spdx", help="spdx bill-of-materials file")
+    parser.add_argument("-i", "--input", help="input file with list of source files to test")
+    args = parser.parse_args()
+
+    # TODO check if required arguments are present and give meaningful feedback
+
+    # collect name and licenses from SPDX blocks
+    spdxDictionary = {}
+    fileName = ""
+    licenses = []
+    f = open(args.spdx, "r")
+    for line in f:
+        if line.startswith("FileName:"):
+            # strip "FileName: "
+            # thus name expected to start with "./", which is relative to CMAKE_SOURCE_DIR
+            fileName = line[10:].strip()
+        if line.startswith("LicenseInfoInFile:"):
+            licenses.append(line[19:].strip())
+        if line == '' or line == "\n":
+            spdxDictionary[fileName] = licenses
+            fileName = ""
+            licenses = []
+    f.close();
+
+    # read file with list of test files
+    f = open(args.input, "r")
+    testfiles = f.readlines()
+    f.close()
+
+    if check_outbound_license(args.license, testfiles, spdxDictionary) == True:
+        sys.exit(0);
+
+    # in any other case, return error code
+    sys.exit(1)