1 files changed, 84 insertions, 0 deletions
diff --git a/third_party/python/taskcluster_taskgraph/taskgraph/util/attributes.py b/third_party/python/taskcluster_taskgraph/taskgraph/util/attributes.py
new file mode 100644
index 0000000000..cf6f11c573
--- /dev/null
+++ b/third_party/python/taskcluster_taskgraph/taskgraph/util/attributes.py
@@ -0,0 +1,84 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+import re
+
+
+def attrmatch(attributes, **kwargs):
+    """Determine whether the given set of task attributes matches.  The
+    conditions are given as keyword arguments, where each keyword names an
+    attribute.  The keyword value can be a literal, a set, or a callable.  A
+    literal must match the attribute exactly.  Given a set, the attribute value
+    must be in the set.  A callable is called with the attribute value.  If an
+    attribute is specified as a keyword argument but not present in the
+    attributes, the result is False."""
+    for kwkey, kwval in kwargs.items():
+        if kwkey not in attributes:
+            return False
+        attval = attributes[kwkey]
+        if isinstance(kwval, set):
+            if attval not in kwval:
+                return False
+        elif callable(kwval):
+            if not kwval(attval):
+                return False
+        elif kwval != attributes[kwkey]:
+            return False
+    return True
+
+
+def keymatch(attributes, target):
+    """Determine if any keys in attributes are a match to target, then return
+    a list of matching values. First exact matches will be checked. Failing
+    that, regex matches and finally a default key.
+    """
+    # exact match
+    if target in attributes:
+        return [attributes[target]]
+
+    # regular expression match
+    matches = [v for k, v in attributes.items() if re.match(k + "$", target)]
+    if matches:
+        return matches
+
+    # default
+    if "default" in attributes:
+        return [attributes["default"]]
+
+    return []
+
+
+def _match_run_on(key, run_on):
+    """
+    Determine whether the given parameter is included in the corresponding `run-on-attribute`.
+    """
+    if "all" in run_on:
+        return True
+    return key in run_on
+
+
+match_run_on_projects = _match_run_on
+match_run_on_tasks_for = _match_run_on
+
+
+def match_run_on_git_branches(git_branch, run_on_git_branches):
+    """
+    Determine whether the given project is included in the `run-on-git-branches` parameter.
+    Allows 'all'.
+    """
+    if "all" in run_on_git_branches:
+        return True
+
+    for expected_git_branch_pattern in run_on_git_branches:
+        if re.match(expected_git_branch_pattern, git_branch):
+            return True
+
+    return False
+
+
+def sorted_unique_list(*args):
+    """Join one or more lists, and return a sorted list of unique members"""
+    combined = set().union(*args)
+    return sorted(combined)