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Since git-checkout-index is often used from scripts which may have a stream of filenames they wish to checkout it is more convenient to use --stdin than xargs. On platforms where fork performance is currently sub-optimal and the length of a command line is limited (*cough* Cygwin *cough*) running a single git-checkout-index process for a large number of files beats spawning it multiple times from xargs. File names are still accepted on the command line if --stdin is not supplied. Nothing is performed if no files are supplied on the command line or by stdin. Signed-off-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
138 lines
3.5 KiB
Text
138 lines
3.5 KiB
Text
git-checkout-index(1)
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=====================
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NAME
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----
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git-checkout-index - Copy files from the index to the working directory
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SYNOPSIS
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--------
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[verse]
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'git-checkout-index' [-u] [-q] [-a] [-f] [-n] [--prefix=<string>]
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[--stage=<number>]
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[-z] [--stdin]
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[--] [<file>]\*
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DESCRIPTION
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-----------
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Will copy all files listed from the index to the working directory
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(not overwriting existing files).
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OPTIONS
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-------
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-u|--index::
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update stat information for the checked out entries in
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the index file.
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-q|--quiet::
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be quiet if files exist or are not in the index
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-f|--force::
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forces overwrite of existing files
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-a|--all::
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checks out all files in the index. Cannot be used
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together with explicit filenames.
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-n|--no-create::
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Don't checkout new files, only refresh files already checked
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out.
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--prefix=<string>::
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When creating files, prepend <string> (usually a directory
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including a trailing /)
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--stage=<number>::
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Instead of checking out unmerged entries, copy out the
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files from named stage. <number> must be between 1 and 3.
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--stdin::
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Instead of taking list of paths from the command line,
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read list of paths from the standard input. Paths are
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separated by LF (i.e. one path per line) by default.
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-z::
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Only meaningful with `--stdin`; paths are separated with
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NUL character instead of LF.
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--::
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Do not interpret any more arguments as options.
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The order of the flags used to matter, but not anymore.
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Just doing `git-checkout-index` does nothing. You probably meant
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`git-checkout-index -a`. And if you want to force it, you want
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`git-checkout-index -f -a`.
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Intuitiveness is not the goal here. Repeatability is. The reason for
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the "no arguments means no work" behavior is that from scripts you are
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supposed to be able to do:
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----------------
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$ find . -name '*.h' -print0 | xargs -0 git-checkout-index -f --
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----------------
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which will force all existing `*.h` files to be replaced with their
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cached copies. If an empty command line implied "all", then this would
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force-refresh everything in the index, which was not the point. But
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since git-checkout-index accepts --stdin it would be faster to use:
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----------------
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$ find . -name '*.h' -print0 | git-checkout-index -f -z --stdin
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----------------
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The `--` is just a good idea when you know the rest will be filenames;
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it will prevent problems with a filename of, for example, `-a`.
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Using `--` is probably a good policy in scripts.
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EXAMPLES
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--------
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To update and refresh only the files already checked out::
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+
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----------------
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$ git-checkout-index -n -f -a && git-update-index --ignore-missing --refresh
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----------------
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Using `git-checkout-index` to "export an entire tree"::
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The prefix ability basically makes it trivial to use
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`git-checkout-index` as an "export as tree" function.
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Just read the desired tree into the index, and do:
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+
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----------------
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$ git-checkout-index --prefix=git-export-dir/ -a
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----------------
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+
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`git-checkout-index` will "export" the index into the specified
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directory.
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+
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The final "/" is important. The exported name is literally just
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prefixed with the specified string. Contrast this with the
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following example.
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Export files with a prefix::
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+
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----------------
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$ git-checkout-index --prefix=.merged- Makefile
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----------------
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+
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This will check out the currently cached copy of `Makefile`
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into the file `.merged-Makefile`.
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Author
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------
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Written by Linus Torvalds <torvalds@osdl.org>
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Documentation
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--------------
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Documentation by David Greaves,
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Junio C Hamano and the git-list <git@vger.kernel.org>.
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GIT
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---
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Part of the gitlink:git[7] suite
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