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[backport 22.11] modules/git: make options passed to less(1) for diff-so-fancy configurable (#3751)

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The `-X` prevents that screen is cleared when showing a diff that's
larger than my screen.

I.e. when running `git diff` and press `q`, the last thing I want to see
is the prompt with `git diff` and *not* the part of the diff I browsed,
to be clear

    $ git diff
    $ <cursor>

Considering that this is somewhat opinionated, I decided to build an
option which allows you to pass arbitrary commands to the less
invocation.

(cherry picked from commit cccd7622bd)

Co-authored-by: Maximilian Bosch <maximilian@mbosch.me>
This commit is contained in:
Naïm Favier 2023-03-08 15:01:04 +01:00 committed by GitHub
parent 86bb69b0b1
commit 07b0b43a92
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 1 deletions
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12
modules/programs/git.nix
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@ -340,6 +340,14 @@ in {
'';
};
pagerOpts = mkOption {
type = types.listOf types.str;
default = [ "--tabs=4" "-RFX" ];
description = ''
Arguments to be passed to <command>less</command>.
'';
};
markEmptyLines = mkOption {
type = types.bool;
default = true;
@ -550,7 +558,9 @@ in {
programs.git.iniContent =
let dsfCommand = "${pkgs.diff-so-fancy}/bin/diff-so-fancy";
in {
core.pager = "${dsfCommand} | ${pkgs.less}/bin/less --tabs=4 -RFX";
core.pager = "${dsfCommand} | ${pkgs.less}/bin/less ${
escapeShellArgs cfg.diff-so-fancy.pagerOpts
}";
interactive.diffFilter = "${dsfCommand} --patch";
diff-so-fancy = {
markEmptyLines = cfg.diff-so-fancy.markEmptyLines;