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Created September 1, 2009 03:26
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Ping:~ Pete$ cd Documents/workspace/teal
Ping:teal Pete$ git stash
Usage: /usr/local/git/bin/git-stash [ | save | list | show | apply | clear | create ]
Ping:teal Pete$
# Hm. I think "pop" is supposed to show up in there somewhere. Let's check git help:
Ping:teal Pete$ git help stash
GIT-STASH(1) Git Manual GIT-STASH(1)
NAME
git-stash - Stash the changes in a dirty working directory away
SYNOPSIS
git-stash (list | show [<stash>] | apply [<stash>] | clear)
git-stash [save [<message>]]
DESCRIPTION
Use git-stash when you want to record the current state of the working directory and the index, but
want to go back to a clean working directory. The command saves your local modifications away and
reverts the working directory to match the HEAD commit.
The modifications stashed away by this command can be listed with git-stash list, inspected with
git-stash show, and restored (potentially on top of a different commit) with git-stash apply. Calling
git-stash without any arguments is equivalent to git-stash save. A stash is by default listed as "WIP
on branchname ...", but you can give a more descriptive message on the command line when you create
one.
The latest stash you created is stored in $GIT_DIR/refs/stash; older stashes are found in the reflog
of this reference and can be named using the usual reflog syntax (e.g. stash@{0} is the most recently
created stash, stash@{1} is the one before it, stash@{2.hours.ago} is also possible).
OPTIONS
save [<message>]
Save your local modifications to a new stash, and run git-reset --hard to revert them. This is
the default action when no subcommand is given. The <message> part is optional and gives the
description along with the stashed state.
list [<options>]
List the stashes that you currently have. Each stash is listed with its name (e.g. stash@{0} is
the latest stash, stash@{1} is the one before, etc.), the name of the branch that was current
when the stash was made, and a short description of the commit the stash was based on.
stash@{0}: WIP on submit: 6ebd0e2... Update git-stash documentation
stash@{1}: On master: 9cc0589... Add git-stash
The command takes options applicable to the git-log(1) command to control what is shown and
how.
show [<stash>]
Show the changes recorded in the stash as a diff between the stashed state and its original
parent. When no <stash> is given, shows the latest one. By default, the command shows the
diffstat, but it will accept any format known to git-diff (e.g., git-stash show -p stash@{1} to
view the second most recent stash in patch form).
apply [--index] [<stash>]
Restore the changes recorded in the stash on top of the current working tree state. When no
<stash> is given, applies the latest one. The working directory must match the index.
This operation can fail with conflicts; you need to resolve them by hand in the working tree.
If the --index option is used, then tries to reinstate not only the working tree's changes, but
also the index's ones. However, this can fail, when you have conflicts (which are stored in the
index, where you therefore can no longer apply the changes as they were originally).
clear Remove all the stashed states. Note that those states will then be subject to pruning, and may
be difficult or impossible to recover.
DISCUSSION
A stash is represented as a commit whose tree records the state of the working directory, and its
first parent is the commit at HEAD when the stash was created. The tree of the second parent records
the state of the index when the stash is made, and it is made a child of the HEAD commit. The ancestry
graph looks like this:
.----W
/ /
-----H----I
where H is the HEAD commit, I is a commit that records the state of the index, and W is a commit that
records the state of the working tree.
EXAMPLES
Pulling into a dirty tree
When you are in the middle of something, you learn that there are upstream changes that are
possibly relevant to what you are doing. When your local changes do not conflict with the
changes in the upstream, a simple git pull will let you move forward.
However, there are cases in which your local changes do conflict with the upstream changes, and
git pull refuses to overwrite your changes. In such a case, you can stash your changes away,
perform a pull, and then unstash, like this:
$ git pull
file foobar not up to date, cannot merge.
$ git stash
$ git pull
$ git stash apply
Interrupted workflow
When you are in the middle of something, your boss comes in and demands that you fix something
immediately. Traditionally, you would make a commit to a temporary branch to store your changes
away, and return to your original branch to make the emergency fix, like this:
$ git checkout -b my_wip
$ git commit -a -m "WIP"
$ git checkout master
$ edit emergency fix
$ git commit -a -m "Fix in a hurry"
$ git checkout my_wip
$ git reset --soft HEAD^
You can use git-stash to simplify the above, like this:
$ git stash
$ edit emergency fix
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