Documentation / git-reset.txton commit fast-import: duplicate into history rather than passing ownership (1ebec8d)
   1git-reset(1)
   2============
   3
   4NAME
   5----
   6git-reset - Reset current HEAD to the specified state
   7
   8SYNOPSIS
   9--------
  10[verse]
  11'git reset' [-q] [<tree-ish>] [--] <paths>...
  12'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...]
  13'git reset' [--soft | --mixed [-N] | --hard | --merge | --keep] [-q] [<commit>]
  14
  15DESCRIPTION
  16-----------
  17In the first and second form, copy entries from `<tree-ish>` to the index.
  18In the third form, set the current branch head (`HEAD`) to `<commit>`,
  19optionally modifying index and working tree to match.
  20The `<tree-ish>`/`<commit>` defaults to `HEAD` in all forms.
  21
  22'git reset' [-q] [<tree-ish>] [--] <paths>...::
  23        This form resets the index entries for all `<paths>` to their
  24        state at `<tree-ish>`.  (It does not affect the working tree or
  25        the current branch.)
  26+
  27This means that `git reset <paths>` is the opposite of `git add
  28<paths>`. This command is equivalent to
  29`git restore [--source=<tree-ish>] --staged <paths>...`.
  30+
  31After running `git reset <paths>` to update the index entry, you can
  32use linkgit:git-restore[1] to check the contents out of the index to
  33the working tree. Alternatively, using linkgit:git-restore[1]
  34and specifying a commit with `--source`, you
  35can copy the contents of a path out of a commit to the index and to the
  36working tree in one go.
  37
  38'git reset' (--patch | -p) [<tree-ish>] [--] [<paths>...]::
  39        Interactively select hunks in the difference between the index
  40        and `<tree-ish>` (defaults to `HEAD`).  The chosen hunks are applied
  41        in reverse to the index.
  42+
  43This means that `git reset -p` is the opposite of `git add -p`, i.e.
  44you can use it to selectively reset hunks. See the ``Interactive Mode''
  45section of linkgit:git-add[1] to learn how to operate the `--patch` mode.
  46
  47'git reset' [<mode>] [<commit>]::
  48        This form resets the current branch head to `<commit>` and
  49        possibly updates the index (resetting it to the tree of `<commit>`) and
  50        the working tree depending on `<mode>`. If `<mode>` is omitted,
  51        defaults to `--mixed`. The `<mode>` must be one of the following:
  52+
  53--
  54--soft::
  55        Does not touch the index file or the working tree at all (but
  56        resets the head to `<commit>`, just like all modes do). This leaves
  57        all your changed files "Changes to be committed", as `git status`
  58        would put it.
  59
  60--mixed::
  61        Resets the index but not the working tree (i.e., the changed files
  62        are preserved but not marked for commit) and reports what has not
  63        been updated. This is the default action.
  64+
  65If `-N` is specified, removed paths are marked as intent-to-add (see
  66linkgit:git-add[1]).
  67
  68--hard::
  69        Resets the index and working tree. Any changes to tracked files in the
  70        working tree since `<commit>` are discarded.
  71
  72--merge::
  73        Resets the index and updates the files in the working tree that are
  74        different between `<commit>` and `HEAD`, but keeps those which are
  75        different between the index and working tree (i.e. which have changes
  76        which have not been added).
  77        If a file that is different between `<commit>` and the index has
  78        unstaged changes, reset is aborted.
  79+
  80In other words, `--merge` does something like a `git read-tree -u -m <commit>`,
  81but carries forward unmerged index entries.
  82
  83--keep::
  84        Resets index entries and updates files in the working tree that are
  85        different between `<commit>` and `HEAD`.
  86        If a file that is different between `<commit>` and `HEAD` has local
  87        changes, reset is aborted.
  88--
  89
  90See "Reset, restore and revert" in linkgit:git[1] for the differences
  91between the three commands.
  92
  93
  94OPTIONS
  95-------
  96
  97-q::
  98--quiet::
  99--no-quiet::
 100        Be quiet, only report errors. The default behavior is set by the
 101        `reset.quiet` config option. `--quiet` and `--no-quiet` will
 102        override the default behavior.
 103
 104
 105EXAMPLES
 106--------
 107
 108Undo add::
 109+
 110------------
 111$ edit                                     <1>
 112$ git add frotz.c filfre.c
 113$ mailx                                    <2>
 114$ git reset                                <3>
 115$ git pull git://info.example.com/ nitfol  <4>
 116------------
 117+
 118<1> You are happily working on something, and find the changes
 119    in these files are in good order.  You do not want to see them
 120    when you run `git diff`, because you plan to work on other files
 121    and changes with these files are distracting.
 122<2> Somebody asks you to pull, and the changes sound worthy of merging.
 123<3> However, you already dirtied the index (i.e. your index does
 124    not match the `HEAD` commit).  But you know the pull you are going
 125    to make does not affect `frotz.c` or `filfre.c`, so you revert the
 126    index changes for these two files.  Your changes in working tree
 127    remain there.
 128<4> Then you can pull and merge, leaving `frotz.c` and `filfre.c`
 129    changes still in the working tree.
 130
 131Undo a commit and redo::
 132+
 133------------
 134$ git commit ...
 135$ git reset --soft HEAD^      <1>
 136$ edit                        <2>
 137$ git commit -a -c ORIG_HEAD  <3>
 138------------
 139+
 140<1> This is most often done when you remembered what you
 141    just committed is incomplete, or you misspelled your commit
 142    message, or both.  Leaves working tree as it was before "reset".
 143<2> Make corrections to working tree files.
 144<3> "reset" copies the old head to `.git/ORIG_HEAD`; redo the
 145    commit by starting with its log message.  If you do not need to
 146    edit the message further, you can give `-C` option instead.
 147+
 148See also the `--amend` option to linkgit:git-commit[1].
 149
 150Undo a commit, making it a topic branch::
 151+
 152------------
 153$ git branch topic/wip          <1>
 154$ git reset --hard HEAD~3       <2>
 155$ git switch topic/wip          <3>
 156------------
 157+
 158<1> You have made some commits, but realize they were premature
 159    to be in the `master` branch.  You want to continue polishing
 160    them in a topic branch, so create `topic/wip` branch off of the
 161    current `HEAD`.
 162<2> Rewind the master branch to get rid of those three commits.
 163<3> Switch to `topic/wip` branch and keep working.
 164
 165Undo commits permanently::
 166+
 167------------
 168$ git commit ...
 169$ git reset --hard HEAD~3   <1>
 170------------
 171+
 172<1> The last three commits (`HEAD`, `HEAD^`, and `HEAD~2`) were bad
 173    and you do not want to ever see them again.  Do *not* do this if
 174    you have already given these commits to somebody else.  (See the
 175    "RECOVERING FROM UPSTREAM REBASE" section in linkgit:git-rebase[1]
 176    for the implications of doing so.)
 177
 178Undo a merge or pull::
 179+
 180------------
 181$ git pull                         <1>
 182Auto-merging nitfol
 183CONFLICT (content): Merge conflict in nitfol
 184Automatic merge failed; fix conflicts and then commit the result.
 185$ git reset --hard                 <2>
 186$ git pull . topic/branch          <3>
 187Updating from 41223... to 13134...
 188Fast-forward
 189$ git reset --hard ORIG_HEAD       <4>
 190------------
 191+
 192<1> Try to update from the upstream resulted in a lot of
 193    conflicts; you were not ready to spend a lot of time merging
 194    right now, so you decide to do that later.
 195<2> "pull" has not made merge commit, so `git reset --hard`
 196    which is a synonym for `git reset --hard HEAD` clears the mess
 197    from the index file and the working tree.
 198<3> Merge a topic branch into the current branch, which resulted
 199    in a fast-forward.
 200<4> But you decided that the topic branch is not ready for public
 201    consumption yet.  "pull" or "merge" always leaves the original
 202    tip of the current branch in `ORIG_HEAD`, so resetting hard to it
 203    brings your index file and the working tree back to that state,
 204    and resets the tip of the branch to that commit.
 205
 206Undo a merge or pull inside a dirty working tree::
 207+
 208------------
 209$ git pull                         <1>
 210Auto-merging nitfol
 211Merge made by recursive.
 212 nitfol                |   20 +++++----
 213 ...
 214$ git reset --merge ORIG_HEAD      <2>
 215------------
 216+
 217<1> Even if you may have local modifications in your
 218    working tree, you can safely say `git pull` when you know
 219    that the change in the other branch does not overlap with
 220    them.
 221<2> After inspecting the result of the merge, you may find
 222    that the change in the other branch is unsatisfactory.  Running
 223    `git reset --hard ORIG_HEAD` will let you go back to where you
 224    were, but it will discard your local changes, which you do not
 225    want.  `git reset --merge` keeps your local changes.
 226
 227
 228Interrupted workflow::
 229+
 230Suppose you are interrupted by an urgent fix request while you
 231are in the middle of a large change.  The files in your
 232working tree are not in any shape to be committed yet, but you
 233need to get to the other branch for a quick bugfix.
 234+
 235------------
 236$ git switch feature  ;# you were working in "feature" branch and
 237$ work work work      ;# got interrupted
 238$ git commit -a -m "snapshot WIP"                 <1>
 239$ git switch master
 240$ fix fix fix
 241$ git commit ;# commit with real log
 242$ git switch feature
 243$ git reset --soft HEAD^ ;# go back to WIP state  <2>
 244$ git reset                                       <3>
 245------------
 246+
 247<1> This commit will get blown away so a throw-away log message is OK.
 248<2> This removes the 'WIP' commit from the commit history, and sets
 249    your working tree to the state just before you made that snapshot.
 250<3> At this point the index file still has all the WIP changes you
 251    committed as 'snapshot WIP'.  This updates the index to show your
 252    WIP files as uncommitted.
 253+
 254See also linkgit:git-stash[1].
 255
 256Reset a single file in the index::
 257+
 258Suppose you have added a file to your index, but later decide you do not
 259want to add it to your commit. You can remove the file from the index
 260while keeping your changes with git reset.
 261+
 262------------
 263$ git reset -- frotz.c                      <1>
 264$ git commit -m "Commit files in index"     <2>
 265$ git add frotz.c                           <3>
 266------------
 267+
 268<1> This removes the file from the index while keeping it in the working
 269    directory.
 270<2> This commits all other changes in the index.
 271<3> Adds the file to the index again.
 272
 273Keep changes in working tree while discarding some previous commits::
 274+
 275Suppose you are working on something and you commit it, and then you
 276continue working a bit more, but now you think that what you have in
 277your working tree should be in another branch that has nothing to do
 278with what you committed previously. You can start a new branch and
 279reset it while keeping the changes in your working tree.
 280+
 281------------
 282$ git tag start
 283$ git switch -c branch1
 284$ edit
 285$ git commit ...                            <1>
 286$ edit
 287$ git switch -c branch2                     <2>
 288$ git reset --keep start                    <3>
 289------------
 290+
 291<1> This commits your first edits in `branch1`.
 292<2> In the ideal world, you could have realized that the earlier
 293    commit did not belong to the new topic when you created and switched
 294    to `branch2` (i.e. `git switch -c branch2 start`), but nobody is
 295    perfect.
 296<3> But you can use `reset --keep` to remove the unwanted commit after
 297    you switched to `branch2`.
 298
 299Split a commit apart into a sequence of commits::
 300+
 301Suppose that you have created lots of logically separate changes and committed
 302them together. Then, later you decide that it might be better to have each
 303logical chunk associated with its own commit. You can use git reset to rewind
 304history without changing the contents of your local files, and then successively
 305use `git add -p` to interactively select which hunks to include into each commit,
 306using `git commit -c` to pre-populate the commit message.
 307+
 308------------
 309$ git reset -N HEAD^                        <1>
 310$ git add -p                                <2>
 311$ git diff --cached                         <3>
 312$ git commit -c HEAD@{1}                    <4>
 313...                                         <5>
 314$ git add ...                               <6>
 315$ git diff --cached                         <7>
 316$ git commit ...                            <8>
 317------------
 318+
 319<1> First, reset the history back one commit so that we remove the original
 320    commit, but leave the working tree with all the changes. The -N ensures
 321    that any new files added with `HEAD` are still marked so that `git add -p`
 322    will find them.
 323<2> Next, we interactively select diff hunks to add using the `git add -p`
 324    facility. This will ask you about each diff hunk in sequence and you can
 325    use simple commands such as "yes, include this", "No don't include this"
 326    or even the very powerful "edit" facility.
 327<3> Once satisfied with the hunks you want to include, you should verify what
 328    has been prepared for the first commit by using `git diff --cached`. This
 329    shows all the changes that have been moved into the index and are about
 330    to be committed.
 331<4> Next, commit the changes stored in the index. The `-c` option specifies to
 332    pre-populate the commit message from the original message that you started
 333    with in the first commit. This is helpful to avoid retyping it. The
 334    `HEAD@{1}` is a special notation for the commit that `HEAD` used to be at
 335    prior to the original reset commit (1 change ago).
 336    See linkgit:git-reflog[1] for more details. You may also use any other
 337    valid commit reference.
 338<5> You can repeat steps 2-4 multiple times to break the original code into
 339    any number of commits.
 340<6> Now you've split out many of the changes into their own commits, and might
 341    no longer use the patch mode of `git add`, in order to select all remaining
 342    uncommitted changes.
 343<7> Once again, check to verify that you've included what you want to. You may
 344    also wish to verify that git diff doesn't show any remaining changes to be
 345    committed later.
 346<8> And finally create the final commit.
 347
 348
 349DISCUSSION
 350----------
 351
 352The tables below show what happens when running:
 353
 354----------
 355git reset --option target
 356----------
 357
 358to reset the `HEAD` to another commit (`target`) with the different
 359reset options depending on the state of the files.
 360
 361In these tables, `A`, `B`, `C` and `D` are some different states of a
 362file. For example, the first line of the first table means that if a
 363file is in state `A` in the working tree, in state `B` in the index, in
 364state `C` in `HEAD` and in state `D` in the target, then `git reset --soft
 365target` will leave the file in the working tree in state `A` and in the
 366index in state `B`.  It resets (i.e. moves) the `HEAD` (i.e. the tip of
 367the current branch, if you are on one) to `target` (which has the file
 368in state `D`).
 369
 370....
 371working index HEAD target         working index HEAD
 372----------------------------------------------------
 373 A       B     C    D     --soft   A       B     D
 374                          --mixed  A       D     D
 375                          --hard   D       D     D
 376                          --merge (disallowed)
 377                          --keep  (disallowed)
 378....
 379
 380....
 381working index HEAD target         working index HEAD
 382----------------------------------------------------
 383 A       B     C    C     --soft   A       B     C
 384                          --mixed  A       C     C
 385                          --hard   C       C     C
 386                          --merge (disallowed)
 387                          --keep   A       C     C
 388....
 389
 390....
 391working index HEAD target         working index HEAD
 392----------------------------------------------------
 393 B       B     C    D     --soft   B       B     D
 394                          --mixed  B       D     D
 395                          --hard   D       D     D
 396                          --merge  D       D     D
 397                          --keep  (disallowed)
 398....
 399
 400....
 401working index HEAD target         working index HEAD
 402----------------------------------------------------
 403 B       B     C    C     --soft   B       B     C
 404                          --mixed  B       C     C
 405                          --hard   C       C     C
 406                          --merge  C       C     C
 407                          --keep   B       C     C
 408....
 409
 410....
 411working index HEAD target         working index HEAD
 412----------------------------------------------------
 413 B       C     C    D     --soft   B       C     D
 414                          --mixed  B       D     D
 415                          --hard   D       D     D
 416                          --merge (disallowed)
 417                          --keep  (disallowed)
 418....
 419
 420....
 421working index HEAD target         working index HEAD
 422----------------------------------------------------
 423 B       C     C    C     --soft   B       C     C
 424                          --mixed  B       C     C
 425                          --hard   C       C     C
 426                          --merge  B       C     C
 427                          --keep   B       C     C
 428....
 429
 430`reset --merge` is meant to be used when resetting out of a conflicted
 431merge. Any mergy operation guarantees that the working tree file that is
 432involved in the merge does not have a local change with respect to the index
 433before it starts, and that it writes the result out to the working tree. So if
 434we see some difference between the index and the target and also
 435between the index and the working tree, then it means that we are not
 436resetting out from a state that a mergy operation left after failing
 437with a conflict. That is why we disallow `--merge` option in this case.
 438
 439`reset --keep` is meant to be used when removing some of the last
 440commits in the current branch while keeping changes in the working
 441tree. If there could be conflicts between the changes in the commit we
 442want to remove and the changes in the working tree we want to keep,
 443the reset is disallowed. That's why it is disallowed if there are both
 444changes between the working tree and `HEAD`, and between `HEAD` and the
 445target. To be safe, it is also disallowed when there are unmerged
 446entries.
 447
 448The following tables show what happens when there are unmerged
 449entries:
 450
 451....
 452working index HEAD target         working index HEAD
 453----------------------------------------------------
 454 X       U     A    B     --soft  (disallowed)
 455                          --mixed  X       B     B
 456                          --hard   B       B     B
 457                          --merge  B       B     B
 458                          --keep  (disallowed)
 459....
 460
 461....
 462working index HEAD target         working index HEAD
 463----------------------------------------------------
 464 X       U     A    A     --soft  (disallowed)
 465                          --mixed  X       A     A
 466                          --hard   A       A     A
 467                          --merge  A       A     A
 468                          --keep  (disallowed)
 469....
 470
 471`X` means any state and `U` means an unmerged index.
 472
 473GIT
 474---
 475Part of the linkgit:git[1] suite