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| author | David Barr <david.barr@cordelta.com> | 2010-10-10 14:30:15 +1100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2010-10-13 15:10:31 -0700 |
| commit | 2794ad524462c4e2ecd4573d650e7b4f8da89a5d (patch) | |
| tree | fdc7ec72b3ccd22b51a0b88a8cf4f9186a6aca45 /Documentation/git-fast-import.txt | |
| parent | d0af3734f14410e9c297aa08bf46fdb153a25ccb (diff) | |
| download | git-2794ad524462c4e2ecd4573d650e7b4f8da89a5d.tar.gz | |
fast-import: Allow filemodify to set the root
v1.7.3-rc0~75^2 (Teach fast-import to import subtrees named by tree id,
2010-06-30) has a shortcoming - it doesn't allow the root to be set.
Extend this behaviour by allowing the root to be referenced as the
empty path, "".
For a command (like filter-branch --subdirectory-filter) that wants
to commit a lot of trees that already exist in the object db, writing
undeltified objects as loose files only to repack them later can
involve a significant amount of overhead.
(23% slow-down observed on Linux 2.6.35, worse on Mac OS X 10.6)
Fortunately we have fast-import (which is one of the only git commands
that will write to a pack directly) but there is not an advertised way
to tell fast-import to commit a given tree without unpacking it.
This patch changes that, by allowing
M 040000 <tree id> ""
as a filemodify line in a commit to reset to a particular tree without
any need to parse it. For example,
M 040000 4b825dc642cb6eb9a060e54bf8d69288fbee4904 ""
is a synonym for the deleteall command and the fast-import equivalent of
git read-tree 4b825dc642cb6eb9a060e54bf8d69288fbee4904
Signed-off-by: David Barr <david.barr@cordelta.com>
Commit-message-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Sverre Rabbelier <srabbelier@gmail.com>
Tested-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/git-fast-import.txt')
| -rw-r--r-- | Documentation/git-fast-import.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt index 966ba4f213..90a46665c9 100644 --- a/Documentation/git-fast-import.txt +++ b/Documentation/git-fast-import.txt @@ -524,6 +524,9 @@ start with double quote (`"`). If an `LF` or double quote must be encoded into `<path>` shell-style quoting should be used, e.g. `"path/with\n and \" in it"`. +Additionally, in `040000` mode, `<path>` may also be an empty string +(`""`) to specify the root of the tree. + The value of `<path>` must be in canonical form. That is it must not: * contain an empty directory component (e.g. `foo//bar` is invalid), |