49 lines
1.7 KiB
Plaintext
49 lines
1.7 KiB
Plaintext
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= Git bundle v2 format
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The Git bundle format is a format that represents both refs and Git objects.
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== Format
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We will use ABNF notation to define the Git bundle format. See
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protocol-common.txt for the details.
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----
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bundle = signature *prerequisite *reference LF pack
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signature = "# v2 git bundle" LF
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prerequisite = "-" obj-id SP comment LF
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comment = *CHAR
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reference = obj-id SP refname LF
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pack = ... ; packfile
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----
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== Semantics
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A Git bundle consists of three parts.
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* "Prerequisites" lists the objects that are NOT included in the bundle and the
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reader of the bundle MUST already have, in order to use the data in the
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bundle. The objects stored in the bundle may refer to prerequisite objects and
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anything reachable from them (e.g. a tree object in the bundle can reference
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a blob that is reachable from a prerequisite) and/or expressed as a delta
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against prerequisite objects.
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* "References" record the tips of the history graph, iow, what the reader of the
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bundle CAN "git fetch" from it.
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* "Pack" is the pack data stream "git fetch" would send, if you fetch from a
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repository that has the references recorded in the "References" above into a
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repository that has references pointing at the objects listed in
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"Prerequisites" above.
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In the bundle format, there can be a comment following a prerequisite obj-id.
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This is a comment and it has no specific meaning. The writer of the bundle MAY
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put any string here. The reader of the bundle MUST ignore the comment.
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=== Note on the shallow clone and a Git bundle
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Note that the prerequisites does not represent a shallow-clone boundary. The
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semantics of the prerequisites and the shallow-clone boundaries are different,
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and the Git bundle v2 format cannot represent a shallow clone repository.
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