diff options
Diffstat (limited to 'Documentation/git-update-index.txt')
| -rw-r--r-- | Documentation/git-update-index.txt | 77 |
1 files changed, 50 insertions, 27 deletions
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt index a3081f4e23..aff01798cd 100644 --- a/Documentation/git-update-index.txt +++ b/Documentation/git-update-index.txt @@ -12,14 +12,14 @@ SYNOPSIS 'git update-index' [--add] [--remove | --force-remove] [--replace] [--refresh] [-q] [--unmerged] [--ignore-missing] - [(--cacheinfo <mode> <object> <file>)...] + [(--cacheinfo <mode>,<object>,<file>)...] [--chmod=(+|-)x] - [--assume-unchanged | --no-assume-unchanged] - [--skip-worktree | --no-skip-worktree] + [--[no-]assume-unchanged] + [--[no-]skip-worktree] [--ignore-submodules] [--really-refresh] [--unresolve] [--again | -g] [--info-only] [--index-info] - [-z] [--stdin] + [-z] [--stdin] [--index-version <n>] [--verbose] [--] [<file>...] @@ -68,8 +68,12 @@ OPTIONS --ignore-missing:: Ignores missing files during a --refresh +--cacheinfo <mode>,<object>,<path>:: --cacheinfo <mode> <object> <path>:: - Directly insert the specified info into the index. + Directly insert the specified info into the index. For + backward compatibility, you can also give these three + arguments as three separate parameters, but new users are + encouraged to use a single-parameter form. --index-info:: Read index information from stdin. @@ -77,22 +81,19 @@ OPTIONS --chmod=(+|-)x:: Set the execute permissions on the updated files. ---assume-unchanged:: ---no-assume-unchanged:: - When these flags are specified, the object names recorded - for the paths are not updated. Instead, these options - set and unset the "assume unchanged" bit for the - paths. When the "assume unchanged" bit is on, git stops - checking the working tree files for possible - modifications, so you need to manually unset the bit to - tell git when you change the working tree file. This is +--[no-]assume-unchanged:: + When this flag is specified, the object names recorded + for the paths are not updated. Instead, this option + sets/unsets the "assume unchanged" bit for the + paths. When the "assume unchanged" bit is on, the user + promises not to change the file and allows Git to assume + that the working tree file matches what is recorded in + the index. If you want to change the working tree file, + you need to unset the bit to tell Git. This is sometimes helpful when working with a big project on a filesystem that has very slow lstat(2) system call (e.g. cifs). + -This option can be also used as a coarse file-level mechanism -to ignore uncommitted changes in tracked files (akin to what -`.gitignore` does for untracked files). Git will fail (gracefully) in case it needs to modify this file in the index e.g. when merging in a commit; thus, in case the assumed-untracked file is changed upstream, @@ -102,8 +103,7 @@ you will need to handle the situation manually. Like '--refresh', but checks stat information unconditionally, without regard to the "assume unchanged" setting. ---skip-worktree:: ---no-skip-worktree:: +--[no-]skip-worktree:: When one of these flags is specified, the object name recorded for the paths are not updated. Instead, these options set and unset the "skip-worktree" bit for the paths. See @@ -143,10 +143,33 @@ you will need to handle the situation manually. --verbose:: Report what is being added and removed from index. +--index-version <n>:: + Write the resulting index out in the named on-disk format version. + Supported versions are 2, 3 and 4. The current default version is 2 + or 3, depending on whether extra features are used, such as + `git add -N`. ++ +Version 4 performs a simple pathname compression that reduces index +size by 30%-50% on large repositories, which results in faster load +time. Version 4 is relatively young (first released in in 1.8.0 in +October 2012). Other Git implementations such as JGit and libgit2 +may not support it yet. + -z:: Only meaningful with `--stdin` or `--index-info`; paths are separated with NUL character instead of LF. +--split-index:: +--no-split-index:: + Enable or disable split index mode. If enabled, the index is + split into two files, $GIT_DIR/index and $GIT_DIR/sharedindex.<SHA-1>. + Changes are accumulated in $GIT_DIR/index while the shared + index file contains all index entries stays unchanged. If + split-index mode is already enabled and `--split-index` is + given again, all changes in $GIT_DIR/index are pushed back to + the shared index file. This mode is designed for very large + indexes that take a significant amount of time to read or write. + \--:: Do not interpret any more arguments as options. @@ -177,7 +200,7 @@ merging. To pretend you have a file with mode and sha1 at path, say: ---------------- -$ git update-index --cacheinfo mode sha1 path +$ git update-index --cacheinfo <mode>,<sha1>,<path> ---------------- '--info-only' is used to register files without placing them in the object @@ -235,7 +258,7 @@ $ git update-index --index-info ------------ The first line of the input feeds 0 as the mode to remove the -path; the SHA1 does not matter as long as it is well formatted. +path; the SHA-1 does not matter as long as it is well formatted. Then the second and third line feeds stage 1 and stage 2 entries for that path. After the above, we would end up with this: @@ -249,18 +272,18 @@ $ git ls-files -s Using ``assume unchanged'' bit ------------------------------ -Many operations in git depend on your filesystem to have an +Many operations in Git depend on your filesystem to have an efficient `lstat(2)` implementation, so that `st_mtime` information for working tree files can be cheaply checked to see if the file contents have changed from the version recorded in the index file. Unfortunately, some filesystems have inefficient `lstat(2)`. If your filesystem is one of them, you can set "assume unchanged" bit to paths you have not changed to -cause git not to do this check. Note that setting this bit on a -path does not mean git will check the contents of the file to -see if it has changed -- it makes git to omit any checking and +cause Git not to do this check. Note that setting this bit on a +path does not mean Git will check the contents of the file to +see if it has changed -- it makes Git to omit any checking and assume it has *not* changed. When you make changes to working -tree files, you have to explicitly tell git about it by dropping +tree files, you have to explicitly tell Git about it by dropping "assume unchanged" bit, either before or after you modify them. In order to set "assume unchanged" bit, use `--assume-unchanged` @@ -270,7 +293,7 @@ have the "assume unchanged" bit set, use `git ls-files -v` The command looks at `core.ignorestat` configuration variable. When this is true, paths updated with `git update-index paths...` and -paths updated with other git commands that update both index and +paths updated with other Git commands that update both index and working tree (e.g. 'git apply --index', 'git checkout-index -u', and 'git read-tree -u') are automatically marked as "assume unchanged". Note that "assume unchanged" bit is *not* set if |