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| author | Elijah Newren <newren@gmail.com> | 2019-10-03 20:27:05 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2019-10-03 22:33:21 (GMT) |
| commit | b8f50e5b60e2654fcbf5f72b682635ee2e624923 (patch) | |
| tree | 2e759859e2b482d9b2927db40232a50bed26b479 /Documentation | |
| parent | f73b2aba05788208ccd9b48f350b90cbfe57e1c4 (diff) | |
| download | git-b8f50e5b60e2654fcbf5f72b682635ee2e624923.zip git-b8f50e5b60e2654fcbf5f72b682635ee2e624923.tar.gz git-b8f50e5b60e2654fcbf5f72b682635ee2e624923.tar.bz2 | |
fast-import: add support for new 'alias' command
fast-export and fast-import have nice --import-marks flags which allow
for incremental migrations. However, if there is a mark in
fast-export's file of marks without a corresponding mark in the one for
fast-import, then we run the risk that fast-export tries to send new
objects relative to the mark it knows which fast-import does not,
causing fast-import to fail.
This arises in practice when there is a filter of some sort running
between the fast-export and fast-import processes which prunes some
commits programmatically. Provide such a filter with the ability to
alias pruned commits to their most recent non-pruned ancestor.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/git-fast-import.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt index 4977869..a3f1e0c 100644 --- a/Documentation/git-fast-import.txt +++ b/Documentation/git-fast-import.txt @@ -337,6 +337,13 @@ and control the current import process. More detailed discussion `commit` command. This command is optional and is not needed to perform an import. +`alias`:: + Record that a mark refers to a given object without first + creating any new object. Using --import-marks and referring + to missing marks will cause fast-import to fail, so aliases + can provide a way to set otherwise pruned commits to a valid + value (e.g. the nearest non-pruned ancestor). + `checkpoint`:: Forces fast-import to close the current packfile, generate its unique SHA-1 checksum and index, and start a new packfile. @@ -914,6 +921,21 @@ a data chunk which does not have an LF as its last byte. + The `LF` after `<delim> LF` is optional (it used to be required). +`alias` +~~~~~~~ +Record that a mark refers to a given object without first creating any +new object. + +.... + 'alias' LF + mark + 'to' SP <commit-ish> LF + LF? +.... + +For a detailed description of `<commit-ish>` see above under `from`. + + `checkpoint` ~~~~~~~~~~~~ Forces fast-import to close the current packfile, start a new one, and to |