fix template/mailfile detection while argument parsing

If template 'foo' is being used in a directory where ./foo exists,
the argument parsing decides that ./foo must be the message to
rewrite and clobbers it.

Now there are more sanity checks in place, and I first try to determine
the template, then the file.

diff --git a/mailplate b/mailplate
index 490ba8efe34cbe3f1e295b3d0d7242730348d87e..a26c8defeff779a3bb7d30bde863d402bcff1dfa 100755 (executable)
--- a/mailplate
+++ b/mailplate
@@ -269,19 +269,27 @@ if options.debug:
 # parse the arguments
 for arg in args:
     if arg == '-':
-        # filename is -, so do nothing, since stdin/stdout are default
-        continue
+        infname = arg
+        outfname = arg
+    elif arg.find(os.path.sep) == -1 and os.access(os.path.join(TPATH, arg), os.R_OK):
+        if templname is not None:
+            err("template already specified (%s), unsure what to do with '%s'"
+                % (templname, arg))
+            sys.exit(posix.EX_USAGE)
+        # argument references an existing template
+        templname = arg
     elif os.path.isfile(arg):
+        if infname is not None:
+            err("input file already specified (%s), unsure what to do with '%s'"
+                % (infname, arg))
+            sys.exit(posix.EX_USAGE)
         # the file exists, so use it as in/out if read/writeable
         if os.access(arg, os.R_OK):
             infname = arg
         if os.access(arg, os.W_OK):
             outfname = arg
-    elif os.access(os.path.join(TPATH, arg), os.R_OK):
-        # argument referenced an existing template
-        templname = arg
     else:
-        err('unknown argument, and cannot find a template by this name: %s' % arg)
+        err('unknown argument: %s' % arg)
         sys.exit(posix.EX_USAGE)
 
 # sanity checks