[dak/master] Use os.path.lexists instead of exists

[Ansgar Burchardt <ansgar@debian.org>]

scripts/debian/link_morgue.sh replaces files present on snapshot.d.o
with symlinks that are not valid on ftp-master.d.o.
---
 dak/clean_suites.py |    2 +-
 daklib/utils.py     |    8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/dak/clean_suites.py b/dak/clean_suites.py
index 4fe2c5f..d5b0fc4 100755
--- a/dak/clean_suites.py
+++ b/dak/clean_suites.py
@@ -296,7 +296,7 @@ def clean(now_date, archives, max_delete, session):
 
                 dest_filename = dest + '/' + os.path.basename(filename)
                 # If the destination file exists; try to find another filename to use
-                if os.path.exists(dest_filename):
+                if os.path.lexists(dest_filename):
                     dest_filename = utils.find_next_free(dest_filename)
 
                 if not Options["No-Action"]:
diff --git a/daklib/utils.py b/daklib/utils.py
index fbe3b1a..655e381 100755
--- a/daklib/utils.py
+++ b/daklib/utils.py
@@ -720,7 +720,7 @@ def move (src, dest, overwrite = 0, perms = 0o664):
         dest_dir = dest
     else:
         dest_dir = os.path.dirname(dest)
-    if not os.path.exists(dest_dir):
+    if not os.path.lexists(dest_dir):
         umask = os.umask(00000)
         os.makedirs(dest_dir, 0o2775)
         os.umask(umask)
@@ -728,7 +728,7 @@ def move (src, dest, overwrite = 0, perms = 0o664):
     if os.path.exists(dest) and os.path.isdir(dest):
         dest += '/' + os.path.basename(src)
     # Don't overwrite unless forced to
-    if os.path.exists(dest):
+    if os.path.lexists(dest):
         if not overwrite:
             fubar("Can't move %s to %s - file already exists." % (src, dest))
         else:
@@ -751,7 +751,7 @@ def copy (src, dest, overwrite = 0, perms = 0o664):
     if os.path.exists(dest) and os.path.isdir(dest):
         dest += '/' + os.path.basename(src)
     # Don't overwrite unless forced to
-    if os.path.exists(dest):
+    if os.path.lexists(dest):
         if not overwrite:
             raise FileExistsError
         else:
@@ -894,7 +894,7 @@ def changes_compare (a, b):
 def find_next_free (dest, too_many=100):
     extra = 0
     orig_dest = dest
-    while os.path.exists(dest) and extra < too_many:
+    while os.path.lexists(dest) and extra < too_many:
         dest = orig_dest + '.' + repr(extra)
         extra += 1
     if extra >= too_many:
-- 
1.7.10.4