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index 7665946f805c71ef38b1ed616108d189dbc2c1cf..d9c5a131250c9d9bf830013dafa1f1d6f2c2a813 100644 (file)
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Reads the tree information given by <tree-ish> into the directory cache,
but does not actually *update* any of the files it "caches". (see:
-git-checkout-cache)
+git-checkout-index)
Optionally, it can merge a tree into the cache, perform a
fast-forward (i.e. 2-way) merge, or a 3-way merge, with the -m
Merging
-------
-If '-m' is specified, "git-read-tree" can performs 3 kinds of
+If '-m' is specified, "git-read-tree" can perform 3 kinds of
merge, a single tree merge if only 1 tree is given, a
fast-forward merge with 2 trees, or a 3-way merge if 3 trees are
provided.
~~~~~~~~~~~~~~~~~
If only 1 tree is specified, git-read-tree operates as if the user did not
specify '-m', except that if the original cache has an entry for a
-given pathname; and the contents of the path matches with the tree
+given pathname, and the contents of the path matches with the tree
being read, the stat info from the cache is used. (In other words, the
-cache's stat()s take precedence over the merged tree's)
+cache's stat()s take precedence over the merged tree's).
That means that if you do a "git-read-tree -m <newtree>" followed by a
-"git-checkout-cache -f -u -a", the "git-checkout-cache" only checks out
+"git-checkout-index -f -u -a", the "git-checkout-index" only checks out
the stuff that really changed.
This is used to avoid unnecessary false hits when "git-diff-files" is
When this form of git-read-tree returns successfully, you can
see what "local changes" you made are carried forward by running
-"git-diff-cache --cached $M". Note that this does not
-necessarily match "git-diff-cache --cached $H" would have
+"git-diff-index --cached $M". Note that this does not
+necessarily match "git-diff-index --cached $H" would have
produced before such a two tree merge. This is because of cases
18 and 19 --- if you already had the changes in $M (e.g. maybe
-you picked it up via e-mail in a patch form), "git-diff-cache
+you picked it up via e-mail in a patch form), "git-diff-index
--cached $H" would have told you about the change before this
-merge, but it would not show in "git-diff-cache --cached $M"
+merge, but it would not show in "git-diff-index --cached $M"
output after two-tree merge.
automatically collapse to "merged" state by git-read-tree.
- a file that has _any_ difference what-so-ever in the three trees
- will stay as separate entries in the index. It's up to "script
+ will stay as separate entries in the index. It's up to "porcelain
policy" to determine how to remove the non-0 stages, and insert a
merged version.
matching "stage1" entry if it exists too. .. all the normal
trivial rules ..
-You would normally use "git-merge-cache" with supplied
-"git-merge-one-file-script" to do this last step. The script
+You would normally use "git-merge-index" with supplied
+"git-merge-one-file" to do this last step. The script
does not touch the files in the work tree, and the entire merge
happens in the index file. In other words, there is no need to
worry about what is in the working directory, since it is never
commited last to your repository:
$ JC=`cat .git/HEAD`
- $ git-checkout-cache -f -u -a $JC
+ $ git-checkout-index -f -u -a $JC
-You do random edits, without running git-update-cache. And then
+You do random edits, without running git-update-index. And then
you notice that the tip of your "upstream" tree has advanced
since you pulled from him:
- $ git-fetch-script rsync://.... linus
+ $ git-fetch rsync://.... linus
$ LT=`cat .git/MERGE_HEAD`
Your work tree is still based on your HEAD ($JC), but you have
then does the right thing. So with the following sequence:
$ git-read-tree -m -u `git-merge-base $JC $LT` $JC $LT
- $ git-merge-cache git-merge-one-file-script -a
+ $ git-merge-index git-merge-one-file -a
$ echo "Merge with Linus" | \
git-commit-tree `git-write-tree` -p $JC -p $LT