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authorJunio C Hamano <gitster@pobox.com>2010-01-13 19:58:34 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-01-13 19:58:34 (GMT)
commit73d66323ac78c750ba42fef23b1cb8fd2110e023 (patch)
treec8df437709d52baabf3c05b0b40c8ea3fa61e606 /Documentation
parent054d2fa05cf0bc55fe1556c9e87d58d67a144f44 (diff)
parent8740773ee5ef450cefd03d3576f348fe65e92edf (diff)
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Merge branch 'nd/sparse'
* nd/sparse: (25 commits) t7002: test for not using external grep on skip-worktree paths t7002: set test prerequisite "external-grep" if supported grep: do not do external grep on skip-worktree entries commit: correctly respect skip-worktree bit ie_match_stat(): do not ignore skip-worktree bit with CE_MATCH_IGNORE_VALID tests: rename duplicate t1009 sparse checkout: inhibit empty worktree Add tests for sparse checkout read-tree: add --no-sparse-checkout to disable sparse checkout support unpack-trees(): ignore worktree check outside checkout area unpack_trees(): apply $GIT_DIR/info/sparse-checkout to the final index unpack-trees(): "enable" sparse checkout and load $GIT_DIR/info/sparse-checkout unpack-trees.c: generalize verify_* functions unpack-trees(): add CE_WT_REMOVE to remove on worktree alone Introduce "sparse checkout" dir.c: export excluded_1() and add_excludes_from_file_1() excluded_1(): support exclude files in index unpack-trees(): carry skip-worktree bit over in merged_entry() Read .gitignore from index if it is skip-worktree Avoid writing to buffer in add_excludes_from_file_1() ... Conflicts: .gitignore Documentation/config.txt Documentation/git-update-index.txt Makefile entry.c t/t7002-grep.sh
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/config.txt4
-rw-r--r--Documentation/git-ls-files.txt1
-rw-r--r--Documentation/git-read-tree.txt52
-rw-r--r--Documentation/git-update-index.txt29
-rw-r--r--Documentation/technical/api-directory-listing.txt3
5 files changed, 88 insertions, 1 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 9f40955..8acb613 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -502,6 +502,10 @@ notes should be printed.
This setting defaults to "refs/notes/commits", and can be overridden by
the `GIT_NOTES_REF` environment variable.
+core.sparseCheckout::
+ Enable "sparse checkout" feature. See section "Sparse checkout" in
+ linkgit:git-read-tree[1] for more information.
+
add.ignore-errors::
Tells 'git-add' to continue adding files when some files cannot be
added due to indexing errors. Equivalent to the '--ignore-errors'
diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt
index 625723e..98f3b9e 100644
--- a/Documentation/git-ls-files.txt
+++ b/Documentation/git-ls-files.txt
@@ -109,6 +109,7 @@ OPTIONS
Identify the file status with the following tags (followed by
a space) at the start of each line:
H:: cached
+ S:: skip-worktree
M:: unmerged
R:: removed/deleted
C:: modified/changed
diff --git a/Documentation/git-read-tree.txt b/Documentation/git-read-tree.txt
index a10ce4b..d6faa14 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];
diff --git a/Documentation/git-update-index.txt b/Documentation/git-update-index.txt
index 6052484..8d88018 100644
--- a/Documentation/git-update-index.txt
+++ b/Documentation/git-update-index.txt
@@ -15,6 +15,7 @@ SYNOPSIS
[--cacheinfo <mode> <object> <file>]\*
[--chmod=(+|-)x]
[--assume-unchanged | --no-assume-unchanged]
+ [--skip-worktree | --no-skip-worktree]
[--ignore-submodules]
[--really-refresh] [--unresolve] [--again | -g]
[--info-only] [--index-info]
@@ -103,6 +104,13 @@ you will need to handle the situation manually.
Like '--refresh', but checks stat information unconditionally,
without regard to the "assume unchanged" setting.
+--skip-worktree::
+--no-skip-worktree::
+ When one of these flags is specified, the object name recorded
+ for the paths are not updated. Instead, these options
+ set and unset the "skip-worktree" bit for the paths. See
+ section "Skip-worktree bit" below for more information.
+
-g::
--again::
Runs 'git-update-index' itself on the paths whose index
@@ -308,6 +316,27 @@ M foo.c
<9> now it checks with lstat(2) and finds it has been changed.
+Skip-worktree bit
+-----------------
+
+Skip-worktree bit can be defined in one (long) sentence: When reading
+an entry, if it is marked as skip-worktree, then Git pretends its
+working directory version is up to date and read the index version
+instead.
+
+To elaborate, "reading" means checking for file existence, reading
+file attributes or file content. The working directory version may be
+present or absent. If present, its content may match against the index
+version or not. Writing is not affected by this bit, content safety
+is still first priority. Note that Git _can_ update working directory
+file, that is marked skip-worktree, if it is safe to do so (i.e.
+working directory version matches index version)
+
+Although this bit looks similar to assume-unchanged bit, its goal is
+different from assume-unchanged bit's. Skip-worktree also takes
+precedence over assume-unchanged bit when both are set.
+
+
Configuration
-------------
diff --git a/Documentation/technical/api-directory-listing.txt b/Documentation/technical/api-directory-listing.txt
index 5bbd18f..add6f43 100644
--- a/Documentation/technical/api-directory-listing.txt
+++ b/Documentation/technical/api-directory-listing.txt
@@ -58,6 +58,9 @@ The result of the enumeration is left in these fields::
Calling sequence
----------------
+Note: index may be looked at for .gitignore files that are CE_SKIP_WORKTREE
+marked. If you to exclude files, make sure you have loaded index first.
+
* Prepare `struct dir_struct dir` and clear it with `memset(&dir, 0,
sizeof(dir))`.