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| author |  Elijah Newren <newren@gmail.com> | 2018-11-15 23:59:56 -0800 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2018-11-17 18:43:52 +0900 |
| commit | a965bb31166d04f3e5c8f7a93569fb73f9a9d749 (patch) | |
| tree | 385913d97dba601ccc48903a5867bb54b92c5a60 /Documentation | |
| parent | fast-import: remove unmaintained duplicate documentation (diff) | |
| download | tgif-a965bb31166d04f3e5c8f7a93569fb73f9a9d749.tar.xz | |
fast-export: add a --show-original-ids option to show original names
Knowing the original names (hashes) of commits can sometimes enable
post-filtering that would otherwise be difficult or impossible. In
particular, the desire to rewrite commit messages which refer to other
prior commits (on top of whatever other filtering is being done) is
very difficult without knowing the original names of each commit.
In addition, knowing the original names (hashes) of blobs can allow
filtering by blob-id without requiring re-hashing the content of the
blob, and is thus useful as a small optimization.
Once we add original ids for both commits and blobs, we may as well
add them for tags too for completeness. Perhaps someone will have a
use for them.
This commit teaches a new --show-original-ids option to fast-export
which will make it add a 'original-oid <hash>' line to blob, commits,
and tags. It also teaches fast-import to parse (and ignore) such
lines.
Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/git-fast-export.txt | 7 | ||||
| -rw-r--r-- | Documentation/git-fast-import.txt | 16 |
2 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/git-fast-export.txt b/Documentation/git-fast-export.txt index f65026662a..64c01ba918 100644 --- a/Documentation/git-fast-export.txt +++ b/Documentation/git-fast-export.txt @@ -122,6 +122,13 @@ marks the same across runs. repository which already contains the necessary parent commits. +--show-original-ids:: + Add an extra directive to the output for commits and blobs, + `original-oid <SHA1SUM>`. While such directives will likely be + ignored by importers such as git-fast-import, it may be useful + for intermediary filters (e.g. for rewriting commit messages + which refer to older commits, or for stripping blobs by id). + --refspec:: Apply the specified refspec to each ref exported. Multiple of them can be specified. diff --git a/Documentation/git-fast-import.txt b/Documentation/git-fast-import.txt index 7ab97745a6..43ab3b1637 100644 --- a/Documentation/git-fast-import.txt +++ b/Documentation/git-fast-import.txt @@ -385,6 +385,7 @@ change to the project. .... 'commit' SP <ref> LF mark? + original-oid? ('author' (SP <name>)? SP LT <email> GT SP <when> LF)? 'committer' (SP <name>)? SP LT <email> GT SP <when> LF data @@ -741,6 +742,19 @@ New marks are created automatically. Existing marks can be moved to another object simply by reusing the same `<idnum>` in another `mark` command. +`original-oid` +~~~~~~~~~~~~~~ +Provides the name of the object in the original source control system. +fast-import will simply ignore this directive, but filter processes +which operate on and modify the stream before feeding to fast-import +may have uses for this information + +.... + 'original-oid' SP <object-identifier> LF +.... + +where `<object-identifer>` is any string not containing LF. + `tag` ~~~~~ Creates an annotated tag referring to a specific commit. To create @@ -749,6 +763,7 @@ lightweight (non-annotated) tags see the `reset` command below. .... 'tag' SP <name> LF 'from' SP <commit-ish> LF + original-oid? 'tagger' (SP <name>)? SP LT <email> GT SP <when> LF data .... @@ -823,6 +838,7 @@ assigned mark. .... 'blob' LF mark? + original-oid? data .... |