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| author |  Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | 2015-03-08 17:12:46 +0700 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2015-03-12 13:45:18 -0700 |
| commit | 1e8fef609e78110e276df633c5ba1fb1f1589fa5 (patch) | |
| tree | c7ccbe9baf7e7b557fbfe77f406198cc5ce20939 /Documentation/technical | |
| parent | mingw32: add uname() (diff) | |
| download | tgif-1e8fef609e78110e276df633c5ba1fb1f1589fa5.tar.xz | |
untracked cache: guard and disable on system changes
If the user enables untracked cache, then
- move worktree to an unsupported filesystem
- or simply upgrade OS
- or move the whole (portable) disk from one machine to another
- or access a shared fs from another machine
there's no guarantee that untracked cache can still function properly.
Record the worktree location and OS footprint in the cache. If it
changes, err on the safe side and disable the cache. The user can
'update-index --untracked-cache' again to make sure all conditions are
met.
This adds a new requirement that setup_git_directory* must be called
before read_cache() because we need worktree location by then, or the
cache is dropped.
This change does not cover all bases, you can fool it if you try
hard. The point is to stop accidents.
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Helped-by: brian m. carlson <sandals@crustytoothpaste.net>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/technical')
| -rw-r--r-- | Documentation/technical/index-format.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/technical/index-format.txt b/Documentation/technical/index-format.txt index db59a13600..b7093af8b2 100644 --- a/Documentation/technical/index-format.txt +++ b/Documentation/technical/index-format.txt @@ -242,6 +242,10 @@ Git index format The extension starts with + - A sequence of NUL-terminated strings, preceded by the size of the + sequence in variable width encoding. Each string describes the + environment where the cache can be used. + - Stat data of $GIT_DIR/info/exclude. See "Index entry" section from ctime field until "file size". |