6 git-update-index - Register file contents in the working tree to the index
13 [--add] [--remove | --force-remove] [--replace]
14 [--refresh] [-q] [--unmerged] [--ignore-missing]
15 [--cacheinfo <mode> <object> <file>]\*
17 [--assume-unchanged | --no-assume-unchanged]
19 [--really-refresh] [--unresolve] [--again | -g]
20 [--info-only] [--index-info]
27 Modifies the index or directory cache. Each file mentioned is updated
28 into the index and any 'unmerged' or 'needs updating' state is
31 See also linkgit:git-add[1] for a more user-friendly way to do some of
32 the most common operations on the index.
34 The way "git-update-index" handles files it is told about can be modified
35 using the various options:
40 If a specified file isn't in the index already then it's
42 Default behaviour is to ignore new files.
45 If a specified file is in the index but is missing then it's
47 Default behavior is to ignore removed file.
50 Looks at the current index and checks to see if merges or
51 updates are needed by checking stat() information.
54 Quiet. If --refresh finds that the index needs an update, the
55 default behavior is to error out. This option makes
56 git-update-index continue anyway.
59 Do not try to update submodules. This option is only respected
60 when passed before --refresh.
63 If --refresh finds unmerged changes in the index, the default
64 behavior is to error out. This option makes git-update-index
68 Ignores missing files during a --refresh
70 --cacheinfo <mode> <object> <path>::
71 Directly insert the specified info into the index.
74 Read index information from stdin.
77 Set the execute permissions on the updated files.
79 --assume-unchanged, --no-assume-unchanged::
80 When these flags are specified, the object name recorded
81 for the paths are not updated. Instead, these options
82 sets and unsets the "assume unchanged" bit for the
83 paths. When the "assume unchanged" bit is on, git stops
84 checking the working tree files for possible
85 modifications, so you need to manually unset the bit to
86 tell git when you change the working tree file. This is
87 sometimes helpful when working with a big project on a
88 filesystem that has very slow lstat(2) system call
92 Runs `git-update-index` itself on the paths whose index
93 entries are different from those from the `HEAD` commit.
96 Restores the 'unmerged' or 'needs updating' state of a
97 file during a merge if it was cleared by accident.
100 Do not create objects in the object database for all
101 <file> arguments that follow this flag; just insert
102 their object IDs into the index.
105 Remove the file from the index even when the working directory
106 still has such a file. (Implies --remove.)
109 By default, when a file `path` exists in the index,
110 git-update-index refuses an attempt to add `path/file`.
111 Similarly if a file `path/file` exists, a file `path`
112 cannot be added. With --replace flag, existing entries
113 that conflicts with the entry being added are
114 automatically removed with warning messages.
117 Instead of taking list of paths from the command line,
118 read list of paths from the standard input. Paths are
119 separated by LF (i.e. one path per line) by default.
122 Report what is being added and removed from index.
125 Only meaningful with `--stdin`; paths are separated with
126 NUL character instead of LF.
129 Do not interpret any more arguments as options.
133 Note that files beginning with '.' are discarded. This includes
134 `./file` and `dir/./file`. If you don't want this, then use
136 The same applies to directories ending '/' and paths with '//'
140 '--refresh' does not calculate a new sha1 file or bring the index
141 up-to-date for mode/content changes. But what it *does* do is to
142 "re-match" the stat information of a file with the index, so that you
143 can refresh the index for a file that hasn't been changed but where
144 the stat entry is out of date.
146 For example, you'd want to do this after doing a "git-read-tree", to link
147 up the stat index details with the proper files.
149 Using --cacheinfo or --info-only
150 --------------------------------
151 '--cacheinfo' is used to register a file that is not in the
152 current working directory. This is useful for minimum-checkout
155 To pretend you have a file with mode and sha1 at path, say:
158 $ git-update-index --cacheinfo mode sha1 path
161 '--info-only' is used to register files without placing them in the object
162 database. This is useful for status-only repositories.
164 Both '--cacheinfo' and '--info-only' behave similarly: the index is updated
165 but the object database isn't. '--cacheinfo' is useful when the object is
166 in the database but the file isn't available locally. '--info-only' is
167 useful when the file is available, but you do not wish to update the
174 `--index-info` is a more powerful mechanism that lets you feed
175 multiple entry definitions from the standard input, and designed
176 specifically for scripts. It can take inputs of three formats:
178 . mode SP sha1 TAB path
180 The first format is what "git-apply --index-info"
181 reports, and used to reconstruct a partial tree
182 that is used for phony merge base tree when falling
185 . mode SP type SP sha1 TAB path
187 The second format is to stuff git-ls-tree output
190 . mode SP sha1 SP stage TAB path
192 This format is to put higher order stages into the
193 index file and matches git-ls-files --stage output.
195 To place a higher stage entry to the index, the path should
196 first be removed by feeding a mode=0 entry for the path, and
197 then feeding necessary input lines in the third format.
199 For example, starting with this index:
203 100644 8a1218a1024a212bb3db30becd860315f9f3ac52 0 frotz
206 you can feed the following input to `--index-info`:
209 $ git update-index --index-info
210 0 0000000000000000000000000000000000000000 frotz
211 100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz
212 100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz
215 The first line of the input feeds 0 as the mode to remove the
216 path; the SHA1 does not matter as long as it is well formatted.
217 Then the second and third line feeds stage 1 and stage 2 entries
218 for that path. After the above, we would end up with this:
222 100644 8a1218a1024a212bb3db30becd860315f9f3ac52 1 frotz
223 100755 8a1218a1024a212bb3db30becd860315f9f3ac52 2 frotz
227 Using ``assume unchanged'' bit
228 ------------------------------
230 Many operations in git depend on your filesystem to have an
231 efficient `lstat(2)` implementation, so that `st_mtime`
232 information for working tree files can be cheaply checked to see
233 if the file contents have changed from the version recorded in
234 the index file. Unfortunately, some filesystems have
235 inefficient `lstat(2)`. If your filesystem is one of them, you
236 can set "assume unchanged" bit to paths you have not changed to
237 cause git not to do this check. Note that setting this bit on a
238 path does not mean git will check the contents of the file to
239 see if it has changed -- it makes git to omit any checking and
240 assume it has *not* changed. When you make changes to working
241 tree files, you have to explicitly tell git about it by dropping
242 "assume unchanged" bit, either before or after you modify them.
244 In order to set "assume unchanged" bit, use `--assume-unchanged`
245 option. To unset, use `--no-assume-unchanged`.
247 The command looks at `core.ignorestat` configuration variable. When
248 this is true, paths updated with `git-update-index paths...` and
249 paths updated with other git commands that update both index and
250 working tree (e.g. `git-apply --index`, `git-checkout-index -u`,
251 and `git-read-tree -u`) are automatically marked as "assume
252 unchanged". Note that "assume unchanged" bit is *not* set if
253 `git-update-index --refresh` finds the working tree file matches
254 the index (use `git-update-index --really-refresh` if you want
255 to mark them as "assume unchanged").
260 To update and refresh only the files already checked out:
263 $ git-checkout-index -n -f -a && git-update-index --ignore-missing --refresh
266 On an inefficient filesystem with `core.ignorestat` set::
269 $ git update-index --really-refresh <1>
270 $ git update-index --no-assume-unchanged foo.c <2>
271 $ git diff --name-only <3>
273 $ git diff --name-only <4>
275 $ git update-index foo.c <5>
276 $ git diff --name-only <6>
278 $ git diff --name-only <7>
279 $ git update-index --no-assume-unchanged foo.c <8>
280 $ git diff --name-only <9>
284 <1> forces lstat(2) to set "assume unchanged" bits for paths that match index.
285 <2> mark the path to be edited.
286 <3> this does lstat(2) and finds index matches the path.
287 <4> this does lstat(2) and finds index does *not* match the path.
288 <5> registering the new version to index sets "assume unchanged" bit.
289 <6> and it is assumed unchanged.
290 <7> even after you edit it.
291 <8> you can tell about the change after the fact.
292 <9> now it checks with lstat(2) and finds it has been changed.
298 The command honors `core.filemode` configuration variable. If
299 your repository is on an filesystem whose executable bits are
300 unreliable, this should be set to 'false' (see linkgit:git-config[1]).
301 This causes the command to ignore differences in file modes recorded
302 in the index and the file mode on the filesystem if they differ only on
303 executable bit. On such an unfortunate filesystem, you may
304 need to use `git-update-index --chmod=`.
306 Quite similarly, if `core.symlinks` configuration variable is set
307 to 'false' (see linkgit:git-config[1]), symbolic links are checked out
308 as plain files, and this command does not modify a recorded file mode
309 from symbolic link to regular file.
311 The command looks at `core.ignorestat` configuration variable. See
312 'Using "assume unchanged" bit' section above.
317 linkgit:git-config[1],
323 Written by Linus Torvalds <torvalds@osdl.org>
327 Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>.
331 Part of the linkgit:git[7] suite