dsa2list: better detection of installation path

It's now possible to symlink the script to ~/bin and run it
from there.

git-svn-id: svn+ssh://svn.debian.org/svn/secure-testing@6768 e39458fd-73e7-0310-bf30-c45bca0a0e42

1 files changed, 15 insertions, 9 deletions

diff --git a/bin/dsa2list b/bin/dsa2list
index e121b248dc..ad531ad95c 100755
--- a/bin/dsa2list
+++ b/bin/dsa2list
@@ -14,15 +14,21 @@ import urllib2
 
 def setup_paths():
     check_file = 'lib/python/debian_support.py'
-    path = os.getcwd()
-    while 1:
-        if os.path.exists("%s/%s" % (path, check_file)):
-            sys.path = [path + '/lib/python'] + sys.path
-            return path
-        idx = string.rfind(path, '/')
-        if idx == -1:
-            raise ImportError, "could not setup paths"
-        path = path[0:idx]
+    paths = [os.getcwd(), os.path.dirname(sys.argv[0])]
+    try:
+        paths.append(os.path.dirname(os.readlink(sys.argv[0])))
+    except OSError:
+        pass
+    for path in paths:
+        while 1:
+            if os.path.exists("%s/%s" % (path, check_file)):
+                sys.path = [path + '/lib/python'] + sys.path
+                return path
+            idx = string.rfind(path, '/')
+            if idx == -1:
+                break
+            path = path[0:idx]
+    raise ImportError, "could not setup paths"
 os.chdir(setup_paths())
 
 import debian_support