verify: introduce an experimental --full flag

The flag currently has no effect, see next changeset for details. We introduce
the flag as experimental to keep the freedom of changing our mind on the final
UI.

Note: this patch highlight a small but in `hg help`. An option section is
generated even if no option are visible.

mercurial/commands.py

@@ -63,6 +63,7 b' from . import ('
     tags as tagsmod,
     ui as uimod,
     util,
+    verify as verifymod,
     wireprotoserver,
 )
 from .utils import (
@@ -6147,8 +6148,10 b' def update(ui, repo, node=None, **opts):'
                 ui.warn("(%s)\n" % obsfatemsg)
         return ret
 
-@command('verify', [], helpcategory=command.CATEGORY_MAINTENANCE)
-def verify(ui, repo):
+@command('verify',
+         [('', 'full', False, 'perform more checks (EXPERIMENTAL)')],
+         helpcategory=command.CATEGORY_MAINTENANCE)
+def verify(ui, repo, **opts):
     """verify the integrity of the repository
 
     Verify the integrity of the current repository.
@@ -6164,7 +6167,10 b' def verify(ui, repo):'
 
     Returns 0 on success, 1 if errors are encountered.
     """
-    return hg.verify(repo)
+    level = None
+    if opts['full']:
+        level = verifymod.VERIFY_FULL
+    return hg.verify(repo, level)
 
 @command(
     'version', [] + formatteropts, helpcategory=command.CATEGORY_HELP,

mercurial/verify.py

@@ -23,6 +23,7 b' from . import ('
 )
 
 VERIFY_DEFAULT = 0
+VERIFY_FULL = 1
 
 def verify(repo, level=None):
     with repo.lock():

tests/test-completion.t

@@ -347,7 +347,7 b' Show all commands + options'
   tip: patch, git, style, template
   unbundle: update
   update: clean, check, merge, date, rev, tool
-  verify: 
+  verify: full
   version: template
 
   $ hg init a

tests/test-help.t

@@ -615,6 +615,8 b' Test command without options'
   
       Returns 0 on success, 1 if errors are encountered.
   
+  options:
+  
   (some details hidden, use --verbose to show complete help)
 
   $ hg help diff