package.json: Update react package dependency

Closes #213

bots/task/cache.py

@@ -0,0 +1,100 @@
+#!/usr/bin/env python3
+
+# This file is part of Cockpit.
+#
+# Copyright (C) 2015 Red Hat, Inc.
+#
+# Cockpit is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Cockpit is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.
+
+# Shared GitHub code. When run as a script, we print out info about
+# our GitHub interacition.
+
+import json
+import os
+import stat
+import tempfile
+import time
+import urllib.request, urllib.parse, urllib.error
+
+__all__ = (
+    'Cache',
+)
+
+class Cache(object):
+    def __init__(self, directory, lag=None):
+        self.directory = directory
+        self.pruned = False
+
+        # Default to zero lag when command on command line
+        if lag is None:
+            if os.isatty(0):
+                lag = 0
+            else:
+                lag = 60
+
+        # The lag tells us how long to assume cached data is "current"
+        self.lag = lag
+
+        # The mark tells us that stuff before this time is not "current"
+        self.marked = 0
+
+    # Prune old expired data from the cache directory
+    def prune(self):
+        if not os.path.exists(self.directory):
+            return
+        now = time.time()
+        try:
+            for filename in os.listdir(self.directory):
+                path = os.path.join(self.directory, filename)
+                if os.path.isfile(path) and os.stat(path).st_mtime < now - 7 * 86400:
+                    os.remove(path)
+        except OSError:
+            pass
+
+    # Read a resource from the cache or return None
+    def read(self, resource):
+        path = os.path.join(self.directory, urllib.parse.quote(resource, safe=''))
+        try:
+            with open(path, 'r') as fp:
+                return json.load(fp)
+        except (IOError, ValueError):
+            return None
+
+    # Write a resource to the cache in an atomic way
+    def write(self, resource, contents):
+        path = os.path.join(self.directory, urllib.parse.quote(resource, safe=''))
+        os.makedirs(self.directory, exist_ok=True)
+        (fd, temp) = tempfile.mkstemp(dir=self.directory)
+        with os.fdopen(fd, 'w') as fp:
+            json.dump(contents, fp)
+        os.chmod(temp, stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
+        os.rename(temp, path)
+        if not self.pruned:
+            self.pruned = True
+            self.prune()
+
+    # Tell the cache that stuff before this time is not "current"
+    def mark(self, mtime=None):
+        if not mtime:
+            mtime = time.time()
+        self.marked = mtime
+
+    # Check if a given resource in the cache is "current" or not
+    def current(self, resource):
+        path = os.path.join(self.directory, urllib.parse.quote(resource, safe=''))
+        try:
+            mtime = os.path.getmtime(path)
+            return mtime > self.marked and mtime > (time.time() - self.lag)
+        except OSError:
+            return False