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-rw-r--r--meta/lib/oe/license.py32
-rw-r--r--meta/lib/oe/tests/test_license.py38
2 files changed, 70 insertions, 0 deletions
diff --git a/meta/lib/oe/license.py b/meta/lib/oe/license.py
new file mode 100644
index 000000000..b230d3ef4
--- /dev/null
+++ b/meta/lib/oe/license.py
@@ -0,0 +1,32 @@
+# vi:sts=4:sw=4:et
+"""Code for parsing OpenEmbedded license strings"""
+
+import ast
+import re
+
+class InvalidLicense(StandardError):
+ def __init__(self, license):
+ self.license = license
+ StandardError.__init__(self)
+
+ def __str__(self):
+ return "invalid license '%s'" % self.license
+
+license_operator = re.compile('([&|() ])')
+license_pattern = re.compile('[a-zA-Z0-9.+_\-]+$')
+
+class LicenseVisitor(ast.NodeVisitor):
+ """Syntax tree visitor which can accept OpenEmbedded license strings"""
+ def visit_string(self, licensestr):
+ new_elements = []
+ elements = filter(lambda x: x.strip(), license_operator.split(licensestr))
+ for pos, element in enumerate(elements):
+ if license_pattern.match(element):
+ if pos > 0 and license_pattern.match(elements[pos-1]):
+ new_elements.append('&')
+ element = '"' + element + '"'
+ elif not license_operator.match(element):
+ raise InvalidLicense(element)
+ new_elements.append(element)
+
+ self.visit(ast.parse(' '.join(new_elements)))
diff --git a/meta/lib/oe/tests/test_license.py b/meta/lib/oe/tests/test_license.py
new file mode 100644
index 000000000..cb949fc76
--- /dev/null
+++ b/meta/lib/oe/tests/test_license.py
@@ -0,0 +1,38 @@
+import unittest
+import oe.license
+
+class SeenVisitor(oe.license.LicenseVisitor):
+ def __init__(self):
+ self.seen = []
+ oe.license.LicenseVisitor.__init__(self)
+
+ def visit_Str(self, node):
+ self.seen.append(node.s)
+
+class TestSingleLicense(unittest.TestCase):
+ licenses = [
+ "GPLv2",
+ "LGPL-2.0",
+ "Artistic",
+ "MIT",
+ "GPLv3+",
+ "FOO_BAR",
+ ]
+ invalid_licenses = ["GPL/BSD"]
+
+ @staticmethod
+ def parse(licensestr):
+ visitor = SeenVisitor()
+ visitor.visit_string(licensestr)
+ return visitor.seen
+
+ def test_single_licenses(self):
+ for license in self.licenses:
+ licenses = self.parse(license)
+ self.assertListEqual(licenses, [license])
+
+ def test_invalid_licenses(self):
+ for license in self.invalid_licenses:
+ with self.assertRaises(oe.license.InvalidLicense) as cm:
+ self.parse(license)
+ self.assertEqual(cm.exception.license, license)