oe/licenses: move tidy_licenses from recipetool

This function, to tidy a license string, is useful outside of recipetool
so move it to oe.license.

(From OE-Core rev: 9d57b53169bc60b281510c49e54123941a17a8f5)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/license.py

@@ -462,3 +462,18 @@ def skip_incompatible_package_licenses(d, pkgs):
             skipped_pkgs[pkg] = incompatible_lic
 
     return skipped_pkgs
+
+def tidy_licenses(value):
+    """
+    Flat, split and sort licenses.
+    """
+    from oe.license import flattened_licenses
+
+    def _choose(a, b):
+        str_a, str_b  = sorted((" & ".join(a), " & ".join(b)), key=str.casefold)
+        return ["(%s | %s)" % (str_a, str_b)]
+
+    if not isinstance(value, str):
+        value = " & ".join(value)
+
+    return sorted(list(set(flattened_licenses(value, _choose))), key=str.casefold)

scripts/lib/recipetool/create.py

@@ -18,6 +18,7 @@ from urllib.parse import urlparse, urldefrag, urlsplit
 import hashlib
 import bb.fetch2
 logger = logging.getLogger('recipetool')
+from oe.license import tidy_licenses
 from oe.license_finder import find_licenses
 
 tinfoil = None
@@ -950,16 +951,6 @@ def fixup_license(value):
         return '(' + value + ')'
     return value
 
-def tidy_licenses(value):
-    """Flat, split and sort licenses"""
-    from oe.license import flattened_licenses
-    def _choose(a, b):
-        str_a, str_b  = sorted((" & ".join(a), " & ".join(b)), key=str.casefold)
-        return ["(%s | %s)" % (str_a, str_b)]
-    if not isinstance(value, str):
-        value = " & ".join(value)
-    return sorted(list(set(flattened_licenses(value, _choose))), key=str.casefold)
-
 def handle_license_vars(srctree, lines_before, handled, extravalues, d):
     lichandled = [x for x in handled if x[0] == 'license']
     if lichandled: