Revert "gen_fast_metamanifest: Use context manager for Pool"

This API does not seem to be present in Python 2. Given its little value
in this script, let's just revert it.

1 files changed, 19 insertions, 18 deletions

diff --git a/utils/gen_fast_metamanifest.py b/utils/gen_fast_metamanifest.py
index c5272b4..bd26c09 100755
--- a/utils/gen_fast_metamanifest.py
+++ b/utils/gen_fast_metamanifest.py
@@ -72,24 +72,25 @@ IGNORE lost+found
 IGNORE packages
 ''')
 
-    with multiprocessing.Pool() as p:
-        # generate 1st batch of sub-Manifests
-        # expecting 20000+ items, so use iterator with a reasonably large
-        # chunksize
-        p.map(gen_fast_manifest.gen_manifest, manifest_dir_generator(1), chunksize=64)
-
-        # timestamp into tier 1 directories
-        ts = datetime.datetime.utcnow().strftime(
-                'TIMESTAMP %Y-%m-%dT%H:%M:%SZ\n').encode('ascii')
-        with io.open('metadata/glsa/Manifest', 'ab') as f:
-            f.write(ts)
-        with io.open('metadata/news/Manifest', 'ab') as f:
-            f.write(ts)
-
-        # 2nd batch (files depending on results of 1st batch)
-        # this one is fast to generate, so let's pass a list and let map()
-        # choose optimal chunksize
-        p.map(gen_fast_manifest.gen_manifest, list(manifest_dir_generator(2)))
+    p = multiprocessing.Pool()
+
+    # generate 1st batch of sub-Manifests
+    # expecting 20000+ items, so use iterator with a reasonably large
+    # chunksize
+    p.map(gen_fast_manifest.gen_manifest, manifest_dir_generator(1), chunksize=64)
+
+    # timestamp into tier 1 directories
+    ts = datetime.datetime.utcnow().strftime(
+            'TIMESTAMP %Y-%m-%dT%H:%M:%SZ\n').encode('ascii')
+    with io.open('metadata/glsa/Manifest', 'ab') as f:
+        f.write(ts)
+    with io.open('metadata/news/Manifest', 'ab') as f:
+        f.write(ts)
+
+    # 2nd batch (files depending on results of 1st batch)
+    # this one is fast to generate, so let's pass a list and let map()
+    # choose optimal chunksize
+    p.map(gen_fast_manifest.gen_manifest, list(manifest_dir_generator(2)))
 
     # finally, generate the top-level Manifest
     gen_fast_manifest.gen_manifest('.')