GIT\-FSCKSection: Git Manual (1)
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NAMEgit-fsck - Verifies the connectivity and validity of the objects in the database
git-fsck [--tags] [--root] [--unreachable] [--cache] [--no-reflogs] [--full] [--strict] [--verbose] [--lost-found] [<object>*]
DESCRIPTIONVerifies the connectivity and validity of the objects in the database.
An object to treat as the head of an unreachability trace.
If no objects are given, git-fsck defaults to using the index file and all SHA1 references in .git/refs/* as heads.
- Print out objects that exist but that aren't readable from any of the reference nodes.
- Report root nodes.
- Report tags.
- Consider any object recorded in the index also as a head node for an unreachability trace.
- Do not consider commits that are referenced only by an entry in a reflog to be reachable. This option is meant only to search for commits that used to be in a ref, but now aren't, but are still in that corresponding reflog.
- Check not just objects in GIT_OBJECT_DIRECTORY ($GIT_DIR/objects), but also the ones found in alternate object pools listed in GIT_ALTERNATE_OBJECT_DIRECTORIES or $GIT_DIR/objects/info/alternates, and in packed git archives found in $GIT_DIR/objects/pack and corresponding pack subdirectories in alternate object pools.
- Enable more strict checking, namely to catch a file mode recorded with g+w bit set, which was created by older versions of git. Existing repositories, including the Linux kernel, git itself, and sparse repository have old objects that triggers this check, but it is recommended to check new projects with this flag.
- Be chatty.
- Write dangling objects into .git/lost-found/commit/ or .git/lost-found/other/, depending on type. If the object is a blob, the contents are written into the file, rather than its object name.
So for example
git-fsck --unreachable HEAD $(cat .git/refs/heads/*)
Any corrupt objects you will have to find in backups or other archives (i.e., you can just remove them and do an "rsync" with some other site in the hopes that somebody else has the object you have corrupted).
expect dangling commits - potential heads - due to lack of head information
- You haven't specified any nodes as heads so it won't be possible to differentiate between un-parented commits and root nodes.
missing sha1 directory <dir>
- The directory holding the sha1 objects is missing.
unreachable <type> <object>
- The <type> object <object>, isn't actually referred to directly or indirectly in any of the trees or commits seen. This can mean that there's another root node that you're not specifying or that the tree is corrupt. If you haven't missed a root node then you might as well delete unreachable nodes since they can't be used.
missing <type> <object>
- The <type> object <object>, is referred to but isn't present in the database.
dangling <type> <object>
- The <type> object <object>, is present in the database but never directly used. A dangling commit could be a root node.
warning: git-fsck: tree <tree> has full pathnames in it
- And it shouldn't...
sha1 mismatch <object>
- The database has an object who's sha1 doesn't match the database value. This indicates a serious data integrity problem.
- used to specify the object database root (usually $GIT_DIR/objects)
- used to specify the index file of the index
- used to specify additional object database roots (usually unset)
AUTHORWritten by Linus Torvalds <email@example.com>
DOCUMENTATIONDocumentation by David Greaves, Junio C Hamano and the git-list <firstname.lastname@example.org>.
GITPart of the git(7) suite
- EXTRACTED DIAGNOSTICS
- ENVIRONMENT VARIABLES