* when both sides add a path identically. The resolution
is to add that path.
---prefix=<prefix>/::
+--prefix=<prefix>::
Keep the current index contents, and read the contents
of the named tree-ish under the directory at `<prefix>`.
The command will refuse to overwrite entries that already
- existed in the original index file. Note that the `<prefix>/`
- value must end with a slash.
+ existed in the original index file.
--exclude-per-directory=<gitignore>::
When running the command with `-u` and `-m` options, the
The id of the tree object(s) to be read/merged.
-Merging
+MERGING
-------
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
+fast-forward merge with 2 trees, or a 3-way merge if 3 or more trees are
provided.
"clean" means that index and work tree coincide, and "exists"/"nothing"
refer to the presence of a path in the specified commit:
+....
I H M Result
-------------------------------------------------------
0 nothing nothing nothing (does not happen)
19 no no yes exists exists keep index
20 yes yes no exists exists use M
21 no yes no exists exists fail
+....
In all "keep index" cases, the index entry stays as in the
original index file. If the entry is not up to date,
have finished your work-in-progress), attempt the merge again.
-Sparse checkout
+SPARSE CHECKOUT
---------------
"Sparse checkout" allows populating the working directory sparsely.