Merge lp:~mfisch/sync.links/gpg-error-check into lp:sync.links

[Matt Fischer]

Adds some error checking to the gpg call. This will catch issues when you enter a bad password.

[Alex Chiang (achiang)]

review: Approve

=== modified file 'put.py'
--- put.py	2012-01-17 05:47:23 +0000
+++ put.py	2012-01-20 03:05:24 +0000
@@ -51,7 +51,12 @@
     abspath = os.path.abspath(tmp)
     os.system("cp '%s' '%s'" % ('/'.join([dotdir_abspath, secure_tgz_gpg]), tmp))
     os.chdir(tmp)
-    os.system("gpg %s" % secure_tgz_gpg)
+    status = os.system("gpg %s" % secure_tgz_gpg)
+    retval = ((status >> 8) & 0xFF)
+    if retval != 0 or not os.path.exists(secure_tgz):
+        print "Failed to decrypt secure dotfiles, probably a bad password"
+        sys.exit(1)
+
     os.system("tar xf %s" % secure_tgz)
     os.unlink(secure_tgz)
     os.unlink(secure_tgz_gpg)