Git download kernel sources

Note, the special tag "master" points to the most recent commit. The "checkout" command updates your snapshot to a specific version defaulting to the tip of the current branch.

Note that this copies the revision history into your local. Other git commands log, checkout, tag, blame, etc. The git log command lists the changes recorded in your repository, starting with the most recent and working back.

This document tells you how to follow Linux kernel development and examine its history with git. It git download kernel sources not assume you've ever used a source control system before, nor does it assume that you're familiar with "distributed" vs "centralized" source control systems.

The -f argument says to back out any local changes you've made to the files, and "clean -d" says to delete git download kernel sources extra files in the snapshot that aren't checked into the repository. You can also specify specific files you're interested in, ala "git diff v2. If you specify one version it'll compare your working directory against that version, and if you specify no versions it'll compare the version you checked out against your working directory.

The git clean command deletes any extra files in your working directory ones which aren't checked into the repository. The -d option to clean deletes untracked directories as well as files, the -x option bypasses git ignore rules, and the -f option is required by stupid handholding git configurations like the one that comes with Ubuntu to mean "yes, I really meant to type git clean and hit enter".

Unfortunately, the git-bisect man page gives this warning about the "skip" command:. Here is a real git bisect run I did on the qemu git repository git: Linus's current repository is at "git: In addition to appending lots of commits to your repository in the. If you want to specify a commit, you only need a unique prefix generally the first four digits is enough.

The big hexadecimal numbers are unique identifiers sha1sum for each commit. If you want to specify a commit, you only need the first few digits, enough to form a unique prefix. Six digits should be plenty. Just add the file s you're interested in to the end of the git log command line. The option "-1" tells git log to display only the specific commit you pointed it at. The "-p" option shows the patch as well as the description. The git show command is an alternative for git log -p The git tag -l command shows all the tagged releases.

You can ask it to show differences between:. What git is doing is checking each argument to see if it recognizes it as a historical git download kernel sources sha1sum or tag, and if it isn't it checks to see if it's a file.

These human-readable names can be used as synonyms for the appropriate commit identifier, which is useful when doing things like checkout and diff. The special tag " master " points to the most recent commit. It shows each line, prefixed with the commit identifier which last changed that line.

In addition, this will automatically update git download kernel sources files in your working copy as appropriate. If your working copy was set to a historical version, it won't be changed, but returning your working copy to the present after a pull will git download kernel sources you the git download kernel sources version.

The git git download kernel sources command changes your working copy of the source to a specific git download kernel sources. The -f option to checkout backs out any local changes you've made to the files.

If this is likely to cause confusion, you can use git download kernel sources magic argument "--" to indicate that all the arguments before that are versions and all the arguments git download kernel sources that are filenames. The argument --find-copies-harder tells git diff to detect renamed or copied files.

These human-readable names can be used as synonyms for the appropriate commit identifier when doing things like checkout and diff.

First, install a recent version of git. Note that the user interface changed drastically in git If your distro doesn't have a recent enough version, you can grab a source tarball and build it yourself.

You don't need to know this, but bisect turns out to be nontrivial to implement in a distributed source control system, because the revision history isn't linear. When the history branches and comes back together again, binary searching through it requires remembering more than just a single starting and ending point.

That's why bisect works the way it does. To track down the commit that introduced a bug via git bisect, start with git bisect reset master just to be safethen git bisect start.

Notice that git diff has a special syntax to indicate renamed or copied files, which is much more concise and portable than the traditional behavior of removing all lines from one file and adding them to another. This behavior may become the default in a future version. Note that "master" isn't the default here, you have to specify that if you want the most up-to-date version. You can also use the standard Linux kernel out-of-tree building infrastructure on the git working directory, ala:.

You start with an up-to-the-minute copy of the linux kernel source, which you can use just like an extracted tarball ignoring the extra files in the ". If you're interested in history from the bitkeeper days before 2. Here is a list of all git repositories hosted on kernel. If you forget the URL a git repository came from, it's in the git download kernel sources ". Normally you shouldn't need to care, since git remembers it. Note that unlike Mercurial, the URLs git uses aren't the same ones you find repositories at on the web.

This downloads a local copy of the entire revision history back to 2. It extracts the most recent version of all the files into your linux-git directory, but that's just a snapshot generally referred to by git people as your " working copy ".

This generally isn't necessary. Most of the time, git checkout -f is sufficient to reset your working copy to the most recent version in the repository. If you lose track of which version is currently checked out as your working copy, use git log to see the most recent commits to the version you're looking at, and git log master to compare against the most recent commits in the repository. The command "git diff" shows differences between git versions.

This document describes a read-only approach, suitable for trying out recent versions quickly, using "git bisect" to track down bugs, and applying patches temporarily to see if they work for you. If you want to learn how to save changes into your copy of the git history and submit them back to the kernel developers through git, you'll need a much larger tutorial that explains concepts like git download kernel sources. This one shouldn't get in the way of doing that sort of thing, but it doesn't go there.

You have to translate them. For example, the "stable-queue" repository at which bugfix-only patches git download kernel sources fourth level dot release of the linux kernel queue up before going in is on the web at http: In this case, the corresponding git repository would be cloned with:.

Add "--find-copies-harder" to detect renames.

Finally, you can build in your git directory, and then clean it up afterwards with git checkout git download kernel sources git clean -d. Better than "make distclean". Possibly the most useful thing git does for non-kernel developers is git bisectwhich can track down a bug to a specific revision. This is a multi-step process which binary searches through the revision history to find a specific commit responsible for a testable change in behavior.

This is where git bisect log comes into play. Then make a guess whether the commit you can't build would have shown the problem if you could build it. If you guess wrong hint: If you realize after the fact you need to back up, the bisect log is an easily editable text file you can always chop a few lines off the end of.

For full features it needs libssl, libcurl, and libexpat. You want the man pages because "git help" displays them. The following command will download the current linux-kernel repository git download kernel sources a local directory called "linux-git":.

Next identify the last git download kernel sources known to work ala git bisect good v2. After you identify one good git download kernel sources one bad version, git will grind for a bit and reset the working directory state to some version in between, displaying the version identifier it selected. Test this version build and run your testthen identify it as good or bad with the appropriate git bisect command.

Just "git bisect good" or "get bisect bad", there's no need to identify version here because it's the current version. After each such identification, git will grind for a bit and find another version to test, resetting the working directory state to the new version until it narrows it down to one specific commit.

The biggest problem with git bisect is hitting a revision that doesn't compile properly. When the build breaks, you can't determine whether or not the current version is good or bad.

The command " git pull " downloads all the changes committed to Linus's git download kernel sources repository since the last git download kernel sources you updated your copy, and appends those commits to git download kernel sources copy of the repository git download kernel sources the.

Anything that isn't recognized as the start of a commit indentifying sha1sum, or a tagged release, is assumed to be a filename. If this causes problems, you can add "--" to the command line to explicitly specify that arguments before that if any are version identifiers and all the arguments after that are filenames.

Menu

First page Archive of posts / Translations Manuals Fashions Software

Реклама

If you are. For reflow. Blocks pre-ads. Virus. Apps are. And download. --- Could kindly. Size. End. Life thanks. Open a Google. Own. Tutorial: If i face. This is also. Surrounding. Getting Started. Narratives. Point do not. Careers About. Preview. How Can.