view mercurial/help/revisions.txt @ 18656:8eb3408bf005

import: don't rollback on failed import --exact (issue3616)

The checkexact() helper function was calling repo.rollback() from inside
an open transaction. In addition to being insane, this is unnecessary
because import will release the transaction on an exception.

It turns out that this has been broken since the feature was first
introduced, first released in v1.0:

changeset:   4263:47ba52121433
user:        Brendan Cully <[e-mail]>
date:        Thu Mar 22 10:44:59 2007 -0700
files:       mercurial/commands.py mercurial/patch.py
description:
Add import --exact.
When this option is set, import will apply the patch (which must
be generated by export) to the parents specified in the patch,
and check that the node produced by the patch matches the node
ID in the patch.

Mercurial supports several ways to specify individual revisions.

A plain integer is treated as a revision number. Negative integers are
treated as sequential offsets from the tip, with -1 denoting the tip,
-2 denoting the revision prior to the tip, and so forth.

A 40-digit hexadecimal string is treated as a unique revision
identifier.

A hexadecimal string less than 40 characters long is treated as a
unique revision identifier and is referred to as a short-form
identifier. A short-form identifier is only valid if it is the prefix
of exactly one full-length identifier.

Any other string is treated as a bookmark, tag, or branch name. A
bookmark is a movable pointer to a revision. A tag is a permanent name
associated with a revision. A branch name denotes the tipmost revision
of that branch. Bookmark, tag, and branch names must not contain the ":"
character.

The reserved name "tip" always identifies the most recent revision.

The reserved name "null" indicates the null revision. This is the
revision of an empty repository, and the parent of revision 0.

The reserved name "." indicates the working directory parent. If no
working directory is checked out, it is equivalent to null. If an
uncommitted merge is in progress, "." is the revision of the first
parent.