[PATCH] bisect: improve option validation message

[Brandon McCaig]

On Fri, Jun 09, 2017 at 03:50:14PM -0400, Augie Fackler wrote:
> It's a pareto improvement over what we've got, so I've queued
> it. I'd encourage some painting of the bike shed on the
> particular wording/formatting of the error message to be a bit
> more in line with our other messages as a follow-up.
> 
> Thanks!

Should I combine the patches or leave them separate? How about
this:

# HG changeset patch
# User Brandon McCaig <bamccaig at gmail.com>
# Date 1497044798 14400
#      Fri Jun 09 17:46:38 2017 -0400
# Node ID ef0370461d011cd21101ec2f72fd6fe09da31f90
# Parent  6720094c6deb90192b46569c43e0707a85bc8cca
bisect: Make option validation message more consistent with hg

Augie suggested improving upon the wording/formatting of the validation
messages as a follow up to a previous patch.

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -9,6 +9,7 @@
 
 import difflib
 import errno
+import itertools
 import operator
 import os
 import random
@@ -894,9 +895,20 @@
             reset = True
     elif extra:
         raise error.Abort(_('incompatible arguments'))
-    elif good + bad + skip + reset + extend + bool(command) > 1:
-        raise error.Abort(_('-g|--good, -b|--bad, -s|--skip, -r|--reset, '
-                            '-e|--extend, and -c|--command are exclusive'))
+
+    incompatibles = {
+        '--bad': bad,
+        '--command': bool(command),
+        '--extend': extend,
+        '--good': good,
+        '--reset': reset,
+        '--skip': skip,
+    }
+
+    for pair in itertools.product(incompatibles.keys(), repeat=2):
+      if pair[0] < pair[1]:
+        if incompatibles[pair[0]] and incompatibles[pair[1]]:
+          raise error.Abort(_('%s and %s are incompatible') % (pair))
 
     cmdutil.checkunfinished(repo)
 
diff --git a/tests/test-bisect.t b/tests/test-bisect.t
--- a/tests/test-bisect.t
+++ b/tests/test-bisect.t
@@ -608,47 +608,47 @@
 
   $ hg bisect -r
   $ hg bisect -b -c false
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --bad and --command are incompatible
   [255]
   $ hg bisect -b -e
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --bad and --extend are incompatible
   [255]
   $ hg bisect -b -g
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --bad and --good are incompatible
   [255]
   $ hg bisect -b -r
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --bad and --reset are incompatible
   [255]
   $ hg bisect -b -s
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --bad and --skip are incompatible
   [255]
   $ hg bisect -c false -e
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --command and --extend are incompatible
   [255]
   $ hg bisect -c false -g
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --command and --good are incompatible
   [255]
   $ hg bisect -c false -r
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --command and --reset are incompatible
   [255]
   $ hg bisect -c false -s
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --command and --skip are incompatible
   [255]
   $ hg bisect -e -g
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --extend and --good are incompatible
   [255]
   $ hg bisect -e -r
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --extend and --reset are incompatible
   [255]
   $ hg bisect -e -s
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --extend and --skip are incompatible
   [255]
   $ hg bisect -g -r
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --good and --reset are incompatible
   [255]
   $ hg bisect -g -s
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --good and --skip are incompatible
   [255]
   $ hg bisect -r -s
-  abort: -g|--good, -b|--bad, -s|--skip, -r|--reset, -e|--extend, and -c|--command are exclusive
+  abort: --reset and --skip are incompatible
   [255]


Regards,


-- 
Brandon McCaig <bamccaig at gmail.com> <bambams at castopulence.org>
Castopulence Software <https://www.castopulence.org/>
Blog <http://www.bambams.ca/>
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