#24903: Remove misleading error message to fix regression.

Before the argparse conversion, compileall would (sometimes) accept multiple
paths when -d was specified.  Afterward, it does not.  The corresponding check
in the original code claimed to prevent multiple *directories* from being
specified...but it didn't really work even to do that.  So this patch fixes
the regression by invoking the consenting adults rule: if you specify a
combination of arguments to compileall that produces files with inconsistent
destdirs (which you could do before), it is on you.

Patch by Jake Garver.

Lib/compileall.py

@@ -196,9 +196,6 @@ def main():
 
     compile_dests = args.compile_dest
 
-    if (args.ddir and (len(compile_dests) != 1
-            or not os.path.isdir(compile_dests[0]))):
-        parser.exit('-d destdir requires exactly one directory argument')
     if args.rx:
         import re
         args.rx = re.compile(args.rx)

Lib/test/test_compileall.py

@@ -323,14 +323,6 @@ class CommandLineTests(unittest.TestCase):
         self.assertCompiled(init2fn)
         self.assertCompiled(bar2fn)
 
-    def test_d_takes_exactly_one_dir(self):
-        rc, out, err = self.assertRunNotOK('-d', 'foo')
-        self.assertEqual(out, b'')
-        self.assertRegex(err, b'-d')
-        rc, out, err = self.assertRunNotOK('-d', 'foo', 'bar')
-        self.assertEqual(out, b'')
-        self.assertRegex(err, b'-d')
-
     def test_d_compile_error(self):
         script_helper.make_script(self.pkgdir, 'crunchyfrog', 'bad(syntax')
         rc, out, err = self.assertRunNotOK('-q', '-d', 'dinsdale', self.pkgdir)

Misc/ACKS

@@ -470,6 +470,7 @@ Raymund Galvin
 Nitin Ganatra
 Fred Gansevles
 Lars Marius Garshol
+Jake Garver
 Dan Gass
 Andrew Gaul
 Matthieu Gautier

Misc/NEWS

@@ -115,6 +115,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #24903: Fix regression in number of arguments compileall accepts when
+  '-d' is specified.  The check on the number of arguments has been dropped
+  completely as it never worked correctly anyway.
+
 - Issue #25764: In the subprocess module, preserve any exception caused by
   fork() failure when preexec_fn is used.