[dak/master] examine-package: lock access to printed_copyrights

[Torsten Werner <twerner@debian.org>]

FIXME: the global variable printed_copyrights is still broken...

Signed-off-by: Torsten Werner <twerner@debian.org>
---
 dak/examine_package.py |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/dak/examine_package.py b/dak/examine_package.py
index 2b92ca7..6a3c804 100755
--- a/dak/examine_package.py
+++ b/dak/examine_package.py
@@ -51,6 +51,7 @@ import apt_pkg
 import apt_inst
 import shutil
 import commands
+import threading
 
 from daklib import utils
 from daklib.dbconn import DBConn, get_binary_from_name_suite
@@ -63,6 +64,7 @@ from daklib.regexes import html_escaping, re_html_escaping, re_version, re_space
 Cnf = None
 Cnf = utils.get_conf()
 
+changes_lock = threading.Lock()
 printed_copyrights = {}
 package_relations = {}           #: Store relations of packages for later output
 
@@ -415,6 +417,8 @@ def do_lintian (filename):
         return do_command("lintian --show-overrides --color always", filename, 1)
 
 def get_copyright (deb_filename):
+    global changes_lock, printed_copyrights
+
     package = re_package.sub(r'\1', deb_filename)
     o = os.popen("dpkg-deb -c %s | egrep 'usr(/share)?/doc/[^/]*/copyright' | awk '{print $6}' | head -n 1" % (deb_filename))
     cright = o.read()[:-1]
@@ -431,11 +435,13 @@ def get_copyright (deb_filename):
     copyrightmd5 = md5.md5(cright).hexdigest()
 
     res = ""
+    changes_lock.acquire()
     if printed_copyrights.has_key(copyrightmd5) and printed_copyrights[copyrightmd5] != "%s (%s)" % (package, deb_filename):
         res += formatted_text( "NOTE: Copyright is the same as %s.\n\n" % \
                                (printed_copyrights[copyrightmd5]))
     else:
         printed_copyrights[copyrightmd5] = "%s (%s)" % (package, deb_filename)
+    changes_lock.release()
     return res+formatted_text(cright)
 
 def get_readme_source (dsc_filename):
@@ -539,7 +545,11 @@ def strip_pgp_signature (filename):
     return contents
 
 def display_changes(suite, changes_filename):
+    global changes_lock, printed_copyrights
     changes = read_changes_or_dsc(suite, changes_filename)
+    changes_lock.acquire()
+    printed_copyrights = {}
+    changes_lock.release()
     return foldable_output(changes_filename, "changes", changes, norow=True)
 
 def check_changes (changes_filename):
-- 
1.5.6.5