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Diffstat (limited to 'Documentation/git-read-tree.txt')
| -rw-r--r-- | Documentation/git-read-tree.txt | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt index a10ce4ba40..d6faa14149 100644 --- a/Documentation/git-read-tree.txt +++ b/Documentation/git-read-tree.txt @@ -10,7 +10,7 @@ SYNOPSIS -------- 'git read-tree' [[-m [--trivial] [--aggressive] | --reset | --prefix=<prefix>] [-u [--exclude-per-directory=<gitignore>] | -i]] - [--index-output=<file>] + [--index-output=<file>] [--no-sparse-checkout] <tree-ish1> [<tree-ish2> [<tree-ish3>]] @@ -110,6 +110,10 @@ OPTIONS directories the index file and index output file are located in. +--no-sparse-checkout:: + Disable sparse checkout support even if `core.sparseCheckout` + is true. + <tree-ish#>:: The id of the tree object(s) to be read/merged. @@ -360,6 +364,52 @@ middle of doing, and when your working tree is ready (i.e. you have finished your work-in-progress), attempt the merge again. +Sparse checkout +--------------- + +"Sparse checkout" allows to sparsely populate working directory. +It uses skip-worktree bit (see linkgit:git-update-index[1]) to tell +Git whether a file on working directory is worth looking at. + +"git read-tree" and other merge-based commands ("git merge", "git +checkout"...) can help maintaining skip-worktree bitmap and working +directory update. `$GIT_DIR/info/sparse-checkout` is used to +define the skip-worktree reference bitmap. When "git read-tree" needs +to update working directory, it will reset skip-worktree bit in index +based on this file, which uses the same syntax as .gitignore files. +If an entry matches a pattern in this file, skip-worktree will be +set on that entry. Otherwise, skip-worktree will be unset. + +Then it compares the new skip-worktree value with the previous one. If +skip-worktree turns from unset to set, it will add the corresponding +file back. If it turns from set to unset, that file will be removed. + +While `$GIT_DIR/info/sparse-checkout` is usually used to specify what +files are in. You can also specify what files are _not_ in, using +negate patterns. For example, to remove file "unwanted": + +---------------- +* +!unwanted +---------------- + +Another tricky thing is fully repopulating working directory when you +no longer want sparse checkout. You cannot just disable "sparse +checkout" because skip-worktree are still in the index and you working +directory is still sparsely populated. You should re-populate working +directory with the `$GIT_DIR/info/sparse-checkout` file content as +follows: + +---------------- +* +---------------- + +Then you can disable sparse checkout. Sparse checkout support in "git +read-tree" and similar commands is disabled by default. You need to +turn `core.sparseCheckout` on in order to have sparse checkout +support. + + SEE ALSO -------- linkgit:git-write-tree[1]; linkgit:git-ls-files[1]; |