# HG changeset patch
# User Jesse Glick <jesse.glick@sun.com>
# Date 2008-01-25 09:11:32
# Node ID aafdea37f7968088508ea53cfc53a79625655e7b
# Parent  5b159ebb19cf9e2fddd008012e836e3d720a167f

Infer a --repository argument from command arguments when reasonable.
In particular: if invoked without -R from a CWD not inside a repo, having been
passed one or more file paths as command arguments, where the nearest enclosing
repo of all of those paths is the same, quietly infer a -R option for that repo.
Otherwise abort with an error message as before.

diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
--- a/mercurial/dispatch.py
+++ b/mercurial/dispatch.py
@@ -150,8 +150,7 @@ def _runcatch(ui, args):
 
     return -1
 
-def _findrepo():
-    p = os.getcwd()
+def _findrepo(p):
     while not os.path.isdir(os.path.join(p, ".hg")):
         oldp, p = p, os.path.dirname(p)
         if p == oldp:
@@ -254,7 +253,7 @@ def _dispatch(ui, args):
         os.chdir(cwd[-1])
 
     # read the local repository .hgrc into a local ui object
-    path = _findrepo() or ""
+    path = _findrepo(os.getcwd()) or ""
     if not path:
         lui = ui
     if path:
@@ -345,6 +344,11 @@ def _dispatch(ui, args):
             ui.setconfig("bundle", "mainreporoot", repo.root)
         except hg.RepoError:
             if cmd not in commands.optionalrepo.split():
+                if args and not path: # try to infer -R from command args
+                    repos = map(_findrepo, args)
+                    guess = repos[0]
+                    if guess and repos.count(guess) == len(repos):
+                        return _dispatch(ui, ['--repository', guess] + fullargs)
                 if not path:
                     raise hg.RepoError(_("There is no Mercurial repository here"
                                          " (.hg not found)"))
diff --git a/tests/test-globalopts b/tests/test-globalopts
--- a/tests/test-globalopts
+++ b/tests/test-globalopts
@@ -25,6 +25,13 @@ echo %% -R/--repository
 hg -R a tip
 hg --repository b tip
 
+echo %% implicit -R
+hg ann a/a
+hg ann a/a a/a
+hg ann a/a b/b
+hg -R b ann a/a
+hg log
+
 echo %% abbrev of long option
 hg --repo c tip
 
diff --git a/tests/test-globalopts.out b/tests/test-globalopts.out
--- a/tests/test-globalopts.out
+++ b/tests/test-globalopts.out
@@ -24,6 +24,12 @@ user:        test
 date:        Thu Jan 01 00:00:01 1970 +0000
 summary:     b
 
+%% implicit -R
+0: a
+0: a
+abort: There is no Mercurial repository here (.hg not found)!
+abort: a/a not under root
+abort: There is no Mercurial repository here (.hg not found)!
 %% abbrev of long option
 changeset:   1:b6c483daf290
 tag:         tip