Differences

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--- git_fsck [2019/03/02 07:46] – created rpjday
+++ git_fsck [2019/03/12 15:21] (current) – [Overview] rpjday
@@ Line 1: / Line 1: @@
 ===== Overview =====
-Using ''git fsck'' to display dangling and unreachable objects.
+Using ''git fsck'' to display dangling and unreachable objects (should cover reflog first).
+Check:
+  * Does ''%%--%%lost-found'' save blobs? Don't think so.
 ===== SYNOPSIS =====
 <code>
-git fsck [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]
+git fsck
-         [--[no-]full] [--strict] [--verbose] [--lost-found]
+  [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]
-         [--[no-]dangling] [--[no-]progress] [--connectivity-only]
+  [--[no-]full] [--strict] [--verbose] [--lost-found]
-         [--[no-]name-objects] [<object>*]
+  [--[no-]dangling] [--[no-]progress] [--connectivity-only]
+  [--[no-]name-objects] [<object>*]
 </code>
+===== Dangling versus unreachable =====
+A dangling object is an unreachable object which is not reachable even from //other// unreachable objects; a dangling object has no references to it from //any// reference or object in the repository.
+<code>
+                A<-----B<-----C   [no reference to this]
+               /
+              /
+             X<-----Y<-----Z (master)
+</code>
+  * unreachable: A, B, and C
+  * dangling: C only
 ===== OPTIONS =====
@@ Line 34: / Line 53: @@
 </code>
-''unreachable'' overrides ''--no-dangling''.
+Note that ''%%--%%unreachable'' overrides ''%%--%%no-dangling''.
+===== Examples =====
+No-op:
+<code>
+$ git fsck --no-dangling
+Checking object directories: 100% (256/256), done.
+Checking objects: 100% (11352/11352), done.
+$
+</code>
+Default:
+<code>
+$ git fsck
+Checking object directories: 100% (256/256), done.
+Checking objects: 100% (11352/11352), done.
+dangling blob 4e811469e1f97f114ed2d3e42fdcec1aedbad174
+dangling blob 2384122beb433045ec091b5131d294b55fe7fb43
+dangling blob db93da5493a753c01d87d665beb748ac255c8547
+dangling blob af96a0d3d093de55ddcad81ed92773a179465d9f
+dangling commit 659d5f247d9b3d4005d9e074f960e473bb0cf09b
+dangling blob e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+dangling blob e7a8f5a79753b9ebebb84b8c8d406316cef48aa6
+dangling commit 8b31c7b18e22fddca50eb9af706b6927f2c14ddc
+dangling commit 75b483ba05490108f06710e0fcd3d2e85ab94e32
+dangling blob 00438efa2c06aa0599b829129850f2a5eca0d3fd
+dangling commit f14813a6d31ad17c991b93b6f19ff353c342cbea
+dangling commit 85cfb058693ce54607314c623162af596aa3025b
+dangling blob ead0457b9cab88d57b051654169fd6b81911602e
+dangling commit d05129499209565b48b609321890ecb868c3b154
+dangling blob c9d75ddf04398095b2842a8332716d7f4f9d20d7
+dangling blob 2b5f8d6ff4282c47204bdd59c4a59a4827f2bd46
+dangling commit 69fd5e6a8733ed63293aab658d584150c0af9db2
+$
+</code>
+All unreachable objects (includes the above):
+<code>
+$ git fsck --unreachable
+Checking object directories: 100% (256/256), done.
+Checking objects: 100% (11352/11352), done.
+unreachable blob 4e811469e1f97f114ed2d3e42fdcec1aedbad174
+unreachable blob 2384122beb433045ec091b5131d294b55fe7fb43
+unreachable tree b408a1d4017a3bee67fba0db2d04af4b0120be77
+unreachable blob db93da5493a753c01d87d665beb748ac255c8547
+unreachable tree a415c2b27bb1e06fe6efc179bfef9417dee62645
+unreachable blob af96a0d3d093de55ddcad81ed92773a179465d9f
+unreachable commit ce1b230fa777cbd4fdc04649d406584a55e59ea5
+unreachable commit 659d5f247d9b3d4005d9e074f960e473bb0cf09b
+unreachable blob e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
+unreachable commit 5ea44280e536d71f8896f271bc472603455bf474
+unreachable blob e7a8f5a79753b9ebebb84b8c8d406316cef48aa6
+unreachable tree a5aa6caa6d9c221ee752e774a24018c099c2b963
+unreachable commit 8b31c7b18e22fddca50eb9af706b6927f2c14ddc
+unreachable commit 75b483ba05490108f06710e0fcd3d2e85ab94e32
+unreachable tree 9db67929ea33dbd8539cb6ad9ac5d50915f1bc05
+unreachable tree 14b736615408abf47aae66dbd92fc4e1e06b49fd
+unreachable tree 63b863e5aff329269456eac37c1d53ceeb356a91
+unreachable tree 84384bebfaa6e84f2fc76d4b0e81a7be39b56c62
+unreachable blob 00438efa2c06aa0599b829129850f2a5eca0d3fd
+unreachable tree f4c3e282fd3e27dbd8bb50182217852a5b3849e5
+unreachable blob b1c792ea6ffc480e7a2eeeb369d5a7349d163339
+unreachable commit f14813a6d31ad17c991b93b6f19ff353c342cbea
+unreachable tree 6dcbdaefb2ef7bd13eda25753b8e1ce7c45b54bb
+unreachable commit 85cfb058693ce54607314c623162af596aa3025b
+unreachable blob ead0457b9cab88d57b051654169fd6b81911602e
+unreachable commit d05129499209565b48b609321890ecb868c3b154
+unreachable blob c9d75ddf04398095b2842a8332716d7f4f9d20d7
+unreachable blob 06d9b625a969aff5073dcfd7af55d0473cdf96da
+unreachable tree f9d9c9aa74059a456865a60c55659cd35f9c4721
+unreachable blob 2b5f8d6ff4282c47204bdd59c4a59a4827f2bd46
+unreachable blob 84e6f6621904d60d682fd8754cdf417baabbc104
+unreachable blob 9d69d12756c325de46190322509c9b06a7a9fd5a
+unreachable tree 346dfc2ea4708fb618919f4a32e40c4f82ba6ca1
+unreachable blob 94efc2c459c53cb0f2ade5162ed4c0cdfe41a470
+unreachable blob 00f4eefe8a9bdec77610d1f8995ffeb839ca322c
+unreachable commit 69fd5e6a8733ed63293aab658d584150c0af9db2
+$
+</code>
+Consider reflog entries to be unreachable:
+<code>
+$ git fsck --unreachable
+Checking object directories: 100% (256/256), done.
+Checking objects: 100% (11352/11352), done.
+$
+</code>
+<code>
+$ git fsck --no-reflogs
+Checking object directories: 100% (256/256), done.
+Checking objects: 100% (11352/11352), done.
+dangling commit 3305054f1c03c3a6d25091fc31bba6cbe8cc1c7b
+dangling commit a20ef4592ca3a29e29420a21d84956d418b8b564
+dangling commit 858f9d07335434e7e3148116c4b89d78338a3911
+dangling commit 5f1992a4245c301ed5e556f4ef47153981a67820
+dangling commit a9211435ad4b79393a9a845b45b6b117a89e77f7
+dangling commit 67a23d481d11fcab4ff7fb1bb69d829e5b7f3d01
+dangling commit 51a49991d6ca4e2262c9ca5cc6f414ab49ba635d
+dangling commit 48c2a6a80a221a3c1328ea5c163ad805320a8287
+dangling commit 234c0a04dbd517e4debc14fa8fac70793c967901
+dangling commit a7561cb3f333a7e9fb93cf233fb79c9e1d19847e
+dangling commit 2be2782c3b03aea7af2622a26e1c673d10d35eb0
+dangling commit 65633ac0f606e70db50460502989a7a74dca8e20
+dangling commit 066b84e3461b5e2f231159175e6641e360bb2477
+dangling commit bb78a0fd0cefa2f6cfb9ecdbd877ce9045e09780
+dangling commit 99fd08769f3e7c134c4fc97c76edd5e9b4c9e562
+$
+</code>
+===== Config options =====
+<code>
+fsck.skipList
+    The path to a list of object names (i.e. one unabbreviated
+    SHA-1 per line) that are known to be broken in a non-fatal
+    way and should be ignored. On versions of Git 2.20 and
+    later comments (#), empty lines, and any leading and
+    trailing whitespace is ignored. Everything but a SHA-1 per
+    line will error out on older versions.
+</code>