git-clean - Remove untracked files from the working tree
Synopsis
git clean [-d] [-f] [-i] [-n] [-q] [-e <pattern>] [-x | -X] [--] <path>…
Description
Cleans the working tree by recursively removing files that are not under version control, starting from the current directory.
Normally, only files unknown to Git are removed, but if the -x
option is specified, ignored files are also removed. This can, for example, be useful to remove all build products.
If any optional <path>...
arguments are given, only those paths are affected.
Step 1 is to show what will be deleted by using the -n
option:
# Print out the list of files and directories which will be removed (dry run)
git clean -n -d
Clean Step - beware: this will delete files:
# Delete the files from the repository
git clean -f
- To remove directories, run
git clean -f -d
or git clean -fd
- To remove ignored files, run
git clean -f -X
or git clean -fX
- To remove ignored and non-ignored files, run
git clean -f -x
or git clean -fx
Note the case difference on the X
for the two latter commands.
If clean.requireForce
is set to "true" (the default) in your configuration, one needs to specify -f
otherwise nothing will actually happen.
Again see the git-clean
docs for more information.
Options
-f
, --force
If the Git configuration variable clean.requireForce is not set to
false, git clean will refuse to run unless given -f
, -n
or -i
.
-x
Don’t use the standard ignore rules read from .gitignore (per
directory) and $GIT_DIR/info/exclude
, but do still use the ignore
rules given with -e
options. This allows removing all untracked files,
including build products. This can be used (possibly in conjunction
with git reset) to create a pristine working directory to test a clean
build.
-X
Remove only files ignored by Git. This may be useful to rebuild
everything from scratch, but keep manually created files.
-n
, --dry-run
Don’t actually remove anything, just show what would be done.
-d
Remove untracked directories in addition to untracked files. If an
untracked directory is managed by a different Git repository, it is
not removed by default. Use -f
option twice if you really want to
remove such a directory.
In the simplest terms, git pull
does a git fetch
followed by a git merge
.
You can do a git fetch
at any time to update your remote-tracking branches under refs/remotes/<remote>/
. This operation never changes any of your own local branches under refs/heads
, and is safe to do without changing your working copy. I have even heard of people running git fetch
periodically in a cron job in the background (although I wouldn't recommend doing this).
A git pull
is what you would do to bring a local branch up-to-date with its remote version, while also updating your other remote-tracking branches.
From the Git documentation for git pull
:
In its default mode, git pull
is shorthand for git fetch
followed by git merge FETCH_HEAD
.
Best Answer
I highly recommend the book "Pro Git" by Scott Chacon. Take time and really read it, while exploring an actual git repo as you do.
HEAD: the current commit your repo is on. Most of the time
HEAD
points to the latest commit in your current branch, but that doesn't have to be the case.HEAD
really just means "what is my repo currently pointing at".In the event that the commit
HEAD
refers to is not the tip of any branch, this is called a "detached head".master: the name of the default branch that git creates for you when first creating a repo. In most cases, "master" means "the main branch". Most shops have everyone pushing to master, and master is considered the definitive view of the repo. But it's also common for release branches to be made off of master for releasing. Your local repo has its own master branch, that almost always follows the master of a remote repo.
origin: the default name that git gives to your main remote repo. Your box has its own repo, and you most likely push out to some remote repo that you and all your coworkers push to. That remote repo is almost always called origin, but it doesn't have to be.
HEAD
is an official notion in git.HEAD
always has a well-defined meaning.master
andorigin
are common names usually used in git, but they don't have to be.