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The /mergetools/vimdiff script, which handles both vimdiff, nvimdiff
and gvimdiff mergetools (the latter 2 simply source the vimdiff script), has a
function merge_cmd() which read the layout variable from git config, and it
would always read the value of mergetool.**vimdiff**.layout, instead of the
mergetool being currently used (vimdiff or nvimdiff or gvimdiff).
It looks like in 7b5cf8be18 (vimdiff: add tool documentation, 2022-03-30),
we explained the current behavior in Documentation/config/mergetool.txt:
```
mergetool.vimdiff.layout::
The vimdiff backend uses this variable to control how its split
windows look like. Applies even if you are using Neovim (`nvim`) or
gVim (`gvim`) as the merge tool. See BACKEND SPECIFIC HINTS section
```
which makes sense why it's explained this way - the vimdiff backend is used by
gvim and nvim. But the mergetool's configuration should be separate for each tool,
and indeed that's confirmed in same commit at Documentation/mergetools/vimdiff.txt:
```
Variants
Instead of `--tool=vimdiff`, you can also use one of these other variants:
* `--tool=gvimdiff`, to open gVim instead of Vim.
* `--tool=nvimdiff`, to open Neovim instead of Vim.
When using these variants, in order to specify a custom layout you will have to
set configuration variables `mergetool.gvimdiff.layout` and
`mergetool.nvimdiff.layout` instead of `mergetool.vimdiff.layout`
```
So it looks like we just forgot to update the 1 part of the vimdiff script
that read the config variable. Cheers.
Though, for backward compatibility, I've kept the mergetool.vimdiff
fallback, so that people who unknowingly relied on it, won't have their
setup broken now.
Signed-off-by: Kipras Melnikovas <kipras@kipras.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
196 lines
6.9 KiB
Plaintext
196 lines
6.9 KiB
Plaintext
Description
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^^^^^^^^^^^
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When specifying `--tool=vimdiff` in `git mergetool` Git will open Vim with a 4
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windows layout distributed in the following way:
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....
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------------------------------------------
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| LOCAL | BASE | REMOTE |
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------------------------------------------
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| MERGED |
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------------------------------------------
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....
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`LOCAL`, `BASE` and `REMOTE` are read-only buffers showing the contents of the
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conflicting file in specific commits ("commit you are merging into", "common
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ancestor commit" and "commit you are merging from" respectively)
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`MERGED` is a writable buffer where you have to resolve the conflicts (using the
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other read-only buffers as a reference). Once you are done, save and exit Vim as
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usual (`:wq`) or, if you want to abort, exit using `:cq`.
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Layout configuration
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^^^^^^^^^^^^^^^^^^^^
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You can change the windows layout used by Vim by setting configuration variable
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`mergetool.vimdiff.layout` which accepts a string where the following separators
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have special meaning:
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- `+` is used to "open a new tab"
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- `,` is used to "open a new vertical split"
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- `/` is used to "open a new horizontal split"
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- `@` is used to indicate the file containing the final version after
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solving the conflicts. If not present, `MERGED` will be used by default.
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The precedence of the operators is as follows (you can use parentheses to change
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it):
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`@` > `+` > `/` > `,`
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Let's see some examples to understand how it works:
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* `layout = "(LOCAL,BASE,REMOTE)/MERGED"`
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+
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--
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This is exactly the same as the default layout we have already seen.
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Note that `/` has precedence over `,` and thus the parenthesis are not
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needed in this case. The next layout definition is equivalent:
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layout = "LOCAL,BASE,REMOTE / MERGED"
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--
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* `layout = "LOCAL,MERGED,REMOTE"`
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+
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--
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If, for some reason, we are not interested in the `BASE` buffer.
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....
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------------------------------------------
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| LOCAL | MERGED | REMOTE |
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------------------------------------------
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....
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--
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* `layout = "MERGED"`
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+
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--
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Only the `MERGED` buffer will be shown. Note, however, that all the other
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ones are still loaded in vim, and you can access them with the "buffers"
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command.
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....
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------------------------------------------
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| MERGED |
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------------------------------------------
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....
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--
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* `layout = "@LOCAL,REMOTE"`
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+
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--
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When `MERGED` is not present in the layout, you must "mark" one of the
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buffers with an asterisk. That will become the buffer you need to edit and
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save after resolving the conflicts.
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....
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------------------------------------------
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| LOCAL | REMOTE |
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------------------------------------------
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....
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--
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* `layout = "LOCAL,BASE,REMOTE / MERGED + BASE,LOCAL + BASE,REMOTE"`
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+
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--
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Three tabs will open: the first one is a copy of the default layout, while
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the other two only show the differences between (`BASE` and `LOCAL`) and
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(`BASE` and `REMOTE`) respectively.
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....
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------------------------------------------
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| <TAB #1> | TAB #2 | TAB #3 | |
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------------------------------------------
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| LOCAL | BASE | REMOTE |
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------------------------------------------
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| MERGED |
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------------------------------------------
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....
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....
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------------------------------------------
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| TAB #1 | <TAB #2> | TAB #3 | |
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------------------------------------------
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| BASE | LOCAL |
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------------------------------------------
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....
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....
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------------------------------------------
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| TAB #1 | TAB #2 | <TAB #3> | |
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------------------------------------------
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| BASE | REMOTE |
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------------------------------------------
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....
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--
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* `layout = "LOCAL,BASE,REMOTE / MERGED + BASE,LOCAL + BASE,REMOTE + (LOCAL/BASE/REMOTE),MERGED"`
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+
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--
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Same as the previous example, but adds a fourth tab with the same
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information as the first tab, with a different layout.
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....
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---------------------------------------------
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| TAB #1 | TAB #2 | TAB #3 | <TAB #4> |
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---------------------------------------------
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| LOCAL | |
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|---------------------| |
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| BASE | MERGED |
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|---------------------| |
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| REMOTE | |
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---------------------------------------------
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....
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Note how in the third tab definition we need to use parentheses to make `,`
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have precedence over `/`.
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--
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Variants
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^^^^^^^^
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Instead of `--tool=vimdiff`, you can also use one of these other variants:
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* `--tool=gvimdiff`, to open gVim instead of Vim.
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* `--tool=nvimdiff`, to open Neovim instead of Vim.
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When using these variants, in order to specify a custom layout you will have to
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set configuration variables `mergetool.gvimdiff.layout` and
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`mergetool.nvimdiff.layout` instead of `mergetool.vimdiff.layout` (though the
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latter will be used as fallback if the variant-specific one is not set).
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In addition, for backwards compatibility with previous Git versions, you can
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also append `1`, `2` or `3` to either `vimdiff` or any of the variants (ex:
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`vimdiff3`, `nvimdiff1`, etc...) to use a predefined layout.
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In other words, using `--tool=[g,n,]vimdiffx` is the same as using
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`--tool=[g,n,]vimdiff` and setting configuration variable
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`mergetool.[g,n,]vimdiff.layout` to...
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* `x=1`: `"@LOCAL, REMOTE"`
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* `x=2`: `"LOCAL, MERGED, REMOTE"`
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* `x=3`: `"MERGED"`
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Example: using `--tool=gvimdiff2` will open `gvim` with three columns (LOCAL,
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MERGED and REMOTE).
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