Permitting the import command to accept a --user option.

The prose section of the help text for the command already said that -u and -m
are accepted, but -u was not listed in the table of options, and did not work.
Useful when accepting patches from other people made by hg diff rather than hg
export. For completeness, also accepting -d DATE.
[CHANGES: rebased against d8878742a924, --no-commit option.]

mercurial/commands.py

@@ -1529,7 +1529,8 b' def import_(ui, repo, patch1, *patches, '
                 finally:
                     files = patch.updatedir(ui, repo, files)
                 if not opts.get('no_commit'):
-                    n = repo.commit(files, message, user, date)
+                    n = repo.commit(files, message, opts.get('user') or user,
+                                    opts.get('date') or date)
                     if opts.get('exact'):
                         if hex(n) != nodeid:
                             repo.rollback()
@@ -2901,8 +2902,9 b' table = {'
           ('', 'exact', None,
            _('apply patch to the nodes from which it was generated')),
           ('', 'import-branch', None,
-           _('Use any branch information in patch (implied by --exact)'))] + commitopts,
-         _('hg import [-p NUM] [-m MESSAGE] [-f] PATCH...')),
+           _('Use any branch information in patch (implied by --exact)'))] +
+         commitopts + commitopts2,
+         _('hg import [OPTION]... PATCH...')),
     "incoming|in":
         (incoming,
          [('M', 'no-merges', None, _('do not show merges')),

tests/test-import

@@ -32,6 +32,13 b' hg --cwd a diff -r0:1 > tip.patch'
 hg --cwd b import -mpatch ../tip.patch
 rm -r b
 
+echo % import of plain diff with specific date and user
+hg clone -r0 a b
+hg --cwd a diff -r0:1 > tip.patch
+hg --cwd b import -mpatch -d '1 0' -u '[e-mail]' ../tip.patch
+hg -R b tip -pv
+rm -r b
+
 echo % import of plain diff should be ok with --no-commit
 hg clone -r0 a b
 hg --cwd a diff -r0:1 > tip.patch

tests/test-import.out

@@ -31,6 +31,30 b' adding file changes'
 added 1 changesets with 2 changes to 2 files
 2 files updated, 0 files merged, 0 files removed, 0 files unresolved
 applying ../tip.patch
+% import of plain diff with specific date and user
+requesting all changes
+adding changesets
+adding manifests
+adding file changes
+added 1 changesets with 2 changes to 2 files
+2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+applying ../tip.patch
+changeset:   1:ca68f19f3a40
+tag:         tip
+user:        [e-mail]
+date:        Thu Jan 01 00:00:01 1970 +0000
+files:       a
+description:
+patch
+
+
+diff -r 80971e65b431 -r ca68f19f3a40 a
+--- a/a	Thu Jan 01 00:00:00 1970 +0000
++++ b/a	Thu Jan 01 00:00:01 1970 +0000
+@@ -1,1 +1,2 @@
+ line 1
++line 2
+
 % import of plain diff should be ok with --no-commit
 requesting all changes
 adding changesets