From 2418e90bf0d4e462f53cdd74e7a8dc2fb7d85efd Mon Sep 17 00:00:00 2001
From: meejah <meejah@meejah.ca>
Date: Wed, 6 May 2020 15:22:22 -0600
Subject: [PATCH] CacheDirectoryManager is unused

---
 src/allmydata/test/test_util.py | 70 +--------------------------------
 src/allmydata/util/cachedir.py  | 43 --------------------
 2 files changed, 1 insertion(+), 112 deletions(-)
 delete mode 100644 src/allmydata/util/cachedir.py

diff --git a/src/allmydata/test/test_util.py b/src/allmydata/test/test_util.py
index ca05e4008..3bddc8bcc 100644
--- a/src/allmydata/test/test_util.py
+++ b/src/allmydata/test/test_util.py
@@ -19,7 +19,7 @@ from twisted.python import log
 
 from allmydata.util import base32, idlib, humanreadable, mathutil, hashutil
 from allmydata.util import assertutil, fileutil, deferredutil, abbreviate
-from allmydata.util import limiter, time_format, pollmixin, cachedir
+from allmydata.util import limiter, time_format, pollmixin
 from allmydata.util import statistics, dictutil, pipeline, yamlutil
 from allmydata.util import log as tahoe_log
 from allmydata.util.spans import Spans, overlap, DataSpans
@@ -1286,74 +1286,6 @@ class TimeFormat(unittest.TestCase, TimezoneMixin):
         self.failUnlessEqual(
             time_format.format_delta(time_1decimal, time_1d21h46m49s_delta), '1d 21h 46m 48s')
 
-class CacheDir(unittest.TestCase):
-    def test_basic(self):
-        basedir = "test_util/CacheDir/test_basic"
-
-        def _failIfExists(name):
-            absfn = os.path.join(basedir, name)
-            self.failIf(os.path.exists(absfn),
-                        "%s exists but it shouldn't" % absfn)
-
-        def _failUnlessExists(name):
-            absfn = os.path.join(basedir, name)
-            self.failUnless(os.path.exists(absfn),
-                            "%s doesn't exist but it should" % absfn)
-
-        cdm = cachedir.CacheDirectoryManager(basedir)
-        a = cdm.get_file("a")
-        b = cdm.get_file("b")
-        c = cdm.get_file("c")
-        for x in {a, b, c}:
-            with open(x.get_filename(), "wb") as f:
-                f.write("hi")
-        del x
-        gc.collect()  # for PyPy
-
-        _failUnlessExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-
-        cdm.check()
-
-        _failUnlessExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-
-        del a
-        gc.collect()  # for PyPy
-        # this file won't be deleted yet, because it isn't old enough
-        cdm.check()
-        _failUnlessExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-
-        # we change the definition of "old" to make everything old
-        cdm.old = -10
-
-        cdm.check()
-        _failIfExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-
-        cdm.old = 60*60
-
-        del b
-        gc.collect()  # for PyPy
-
-        cdm.check()
-        _failIfExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-
-        b2 = cdm.get_file("b")
-
-        cdm.check()
-        _failIfExists("a")
-        _failUnlessExists("b")
-        _failUnlessExists("c")
-        del b2
-        gc.collect()  # for PyPy
 
 ctr = [0]
 class EqButNotIs(object):
diff --git a/src/allmydata/util/cachedir.py b/src/allmydata/util/cachedir.py
deleted file mode 100644
index 118a8a7eb..000000000
--- a/src/allmydata/util/cachedir.py
+++ /dev/null
@@ -1,43 +0,0 @@
-
-import os.path, stat, weakref, time
-from twisted.application import service, internet
-from allmydata.util import fileutil
-
-HOUR = 60*60
-
-class CacheDirectoryManager(service.MultiService):
-    def __init__(self, basedir, pollinterval=1*HOUR, old=1*HOUR):
-        service.MultiService.__init__(self)
-        self.basedir = basedir
-        fileutil.make_dirs(basedir)
-        self.old = old
-        self.files = weakref.WeakValueDictionary()
-
-        t = internet.TimerService(pollinterval, self.check)
-        t.setServiceParent(self)
-
-    def get_file(self, key):
-        assert isinstance(key, str) # used as filename
-        absfn = os.path.join(self.basedir, key)
-        if os.path.exists(absfn):
-            os.utime(absfn, None)
-        cf = CacheFile(absfn)
-        self.files[key] = cf
-        return cf
-
-    def check(self):
-        now = time.time()
-        for fn in os.listdir(self.basedir):
-            if fn in self.files:
-                continue
-            absfn = os.path.join(self.basedir, fn)
-            mtime = os.stat(absfn)[stat.ST_MTIME]
-            if now - mtime > self.old:
-                os.remove(absfn)
-
-class CacheFile(object):
-    def __init__(self, absfn):
-        self.filename = absfn
-
-    def get_filename(self):
-        return self.filename