projects / thirdparty / git.git / blame
| Commit | Line | Data |
|---|---|---|
| 2cf565c5 DG |
1 | git-fsck-cache(1) |
| 2 | ================= | |
| 3 | v0.1, May 2005 | |
| 4 | ||
| 5 | NAME | |
| 6 | ---- | |
| 7 | git-fsck-cache - Verifies the connectivity and validity of the objects in the database | |
| 8 | ||
| 9 | ||
| 10 | SYNOPSIS | |
| 11 | -------- | |
| 12 | 'git-fsck-cache' [--tags] [--root] [[--unreachable] [--cache] <object>\*] | |
| 13 | ||
| 14 | DESCRIPTION | |
| 15 | ----------- | |
| 16 | Verifies the connectivity and validity of the objects in the database. | |
| 17 | ||
| 18 | OPTIONS | |
| 19 | ------- | |
| 20 | <object>:: | |
| 21 | An object to treat as the head of an unreachability trace. | |
| 22 | ||
| 23 | --unreachable:: | |
| 24 | Print out objects that exist but that aren't readable from any | |
| 25 | of the specified head nodes. | |
| 26 | ||
| 27 | --root:: | |
| 28 | Report root nodes. | |
| 29 | ||
| 30 | --tags:: | |
| 31 | Report tags. | |
| 32 | ||
| 33 | --cache:: | |
| 34 | Consider any object recorded in the cache also as a head node for | |
| 35 | an unreachability trace. | |
| 36 | ||
| 37 | It tests SHA1 and general object sanity, and it does full tracking of | |
| 38 | the resulting reachability and everything else. It prints out any | |
| 39 | corruption it finds (missing or bad objects), and if you use the | |
| 40 | '--unreachable' flag it will also print out objects that exist but | |
| 41 | that aren't readable from any of the specified head nodes. | |
| 42 | ||
| 43 | So for example | |
| 44 | ||
| 45 | git-fsck-cache --unreachable $(cat .git/HEAD) | |
| 46 | ||
| 47 | or, for Cogito users: | |
| 48 | ||
| 49 | git-fsck-cache --unreachable $(cat .git/refs/heads/*) | |
| 50 | ||
| 51 | will do quite a _lot_ of verification on the tree. There are a few | |
| 52 | extra validity tests to be added (make sure that tree objects are | |
| 53 | sorted properly etc), but on the whole if "git-fsck-cache" is happy, you | |
| 54 | do have a valid tree. | |
| 55 | ||
| 56 | Any corrupt objects you will have to find in backups or other archives | |
| 57 | (ie you can just remove them and do an "rsync" with some other site in | |
| 58 | the hopes that somebody else has the object you have corrupted). | |
| 59 | ||
| 60 | Of course, "valid tree" doesn't mean that it wasn't generated by some | |
| 61 | evil person, and the end result might be crap. Git is a revision | |
| 62 | tracking system, not a quality assurance system ;) | |
| 63 | ||
| 64 | Extracted Diagnostics | |
| 65 | --------------------- | |
| 66 | ||
| 67 | expect dangling commits - potential heads - due to lack of head information:: | |
| 68 | You haven't specified any nodes as heads so it won't be | |
| 69 | possible to differentiate between un-parented commits and | |
| 70 | root nodes. | |
| 71 | ||
| 72 | missing sha1 directory '<dir>':: | |
| 73 | The directory holding the sha1 objects is missing. | |
| 74 | ||
| 75 | unreachable <type> <object>:: | |
| 76 | The <type> object <object>, isn't actually referred to directly | |
| 77 | or indirectly in any of the trees or commits seen. This can | |
| 78 | mean that there's another root node that you're not specifying | |
| 79 | or that the tree is corrupt. If you haven't missed a root node | |
| 80 | then you might as well delete unreachable nodes since they | |
| 81 | can't be used. | |
| 82 | ||
| 83 | missing <type> <object>:: | |
| 84 | The <type> object <object>, is referred to but isn't present in | |
| 85 | the database. | |
| 86 | ||
| 87 | dangling <type> <object>:: | |
| 88 | The <type> object <object>, is present in the database but never | |
| 89 | 'directly' used. A dangling commit could be a root node. | |
| 90 | ||
| 91 | warning: git-fsck-cache: tree <tree> has full pathnames in it:: | |
| 92 | And it shouldn't... | |
| 93 | ||
| 94 | sha1 mismatch <object>:: | |
| 95 | The database has an object who's sha1 doesn't match the | |
| 96 | database value. | |
| 97 | This indicates a serious data integrity problem. | |
| 98 | (note: this error occured during early git development when | |
| 99 | the database format changed.) | |
| 100 | ||
| 101 | Environment Variables | |
| 102 | --------------------- | |
| 103 | ||
| 104 | GIT_OBJECT_DIRECTORY:: | |
| 105 | used to specify the object database root (usually .git/objects) | |
| 106 | ||
| 107 | GIT_INDEX_FILE:: | |
| 108 | used to specify the cache | |
| 109 | ||
| 110 | ||
| 111 | Author | |
| 112 | ------ | |
| 113 | Written by Linus Torvalds <torvalds@osdl.org> | |
| 114 | ||
| 115 | Documentation | |
| 116 | -------------- | |
| 117 | Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>. | |
| 118 | ||
| 119 | GIT | |
| 120 | --- | |
| 121 | Part of the link:git.html[git] suite | |
| 122 |