1
0
Fork 0
mirror of https://github.com/nix-community/home-manager synced 2024-11-15 23:59:45 +01:00
home-manager/modules/programs/git.nix
Roch D'Amour 0382c5f75e
git: Add option to use difftastic as diff tool (#2850)
Difftastic is a syntax-aware diff tool which can be used with git.
2022-04-04 08:53:29 -06:00

436 lines
13 KiB
Nix
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.git;
# create [section "subsection"] keys from "section.subsection" attrset names
mkSectionName = name:
let
containsQuote = strings.hasInfix ''"'' name;
sections = splitString "." name;
section = head sections;
subsections = tail sections;
subsection = concatStringsSep "." subsections;
in if containsQuote || subsections == [ ] then
name
else
''${section} "${subsection}"'';
mkValueString = v:
let
escapedV = ''
"${
replaceStrings [ "\n" " " ''"'' "\\" ] [ "\\n" "\\t" ''\"'' "\\\\" ] v
}"'';
in generators.mkValueStringDefault { } (if isString v then escapedV else v);
# generation for multiple ini values
mkKeyValue = k: v:
let
mkKeyValue =
generators.mkKeyValueDefault { inherit mkValueString; } " = " k;
in concatStringsSep "\n" (map (kv: " " + mkKeyValue kv) (toList v));
# converts { a.b.c = 5; } to { "a.b".c = 5; } for toINI
gitFlattenAttrs = let
recurse = path: value:
if isAttrs value then
mapAttrsToList (name: value: recurse ([ name ] ++ path) value) value
else if length path > 1 then {
${concatStringsSep "." (reverseList (tail path))}.${head path} = value;
} else {
${head path} = value;
};
in attrs: foldl recursiveUpdate { } (flatten (recurse [ ] attrs));
gitToIni = attrs:
let toIni = generators.toINI { inherit mkKeyValue mkSectionName; };
in toIni (gitFlattenAttrs attrs);
gitIniType = with types;
let
primitiveType = either str (either bool int);
multipleType = either primitiveType (listOf primitiveType);
sectionType = attrsOf multipleType;
supersectionType = attrsOf (either multipleType sectionType);
in attrsOf supersectionType;
signModule = types.submodule {
options = {
key = mkOption {
type = types.nullOr types.str;
description = ''
The default GPG signing key fingerprint.
</para><para>
Set to <literal>null</literal> to let GnuPG decide what signing key
to use depending on commits author.
'';
};
signByDefault = mkOption {
type = types.bool;
default = false;
description = "Whether commits should be signed by default.";
};
gpgPath = mkOption {
type = types.str;
default = "${pkgs.gnupg}/bin/gpg2";
defaultText = "\${pkgs.gnupg}/bin/gpg2";
description = "Path to GnuPG binary to use.";
};
};
};
includeModule = types.submodule ({ config, ... }: {
options = {
condition = mkOption {
type = types.nullOr types.str;
default = null;
description = ''
Include this configuration only when <varname>condition</varname>
matches. Allowed conditions are described in
<citerefentry>
<refentrytitle>git-config</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
'';
};
path = mkOption {
type = with types; either str path;
description = "Path of the configuration file to include.";
};
contents = mkOption {
type = types.attrsOf types.anything;
default = { };
example = literalExpression ''
{
user = {
email = "bob@work.example.com";
name = "Bob Work";
signingKey = "1A2B3C4D5E6F7G8H";
};
commit = {
gpgSign = true;
};
};
'';
description = ''
Configuration to include. If empty then a path must be given.
This follows the configuration structure as described in
<citerefentry>
<refentrytitle>git-config</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
'';
};
};
config.path = mkIf (config.contents != { })
(mkDefault (pkgs.writeText "contents" (gitToIni config.contents)));
});
in {
meta.maintainers = [ maintainers.rycee ];
options = {
programs.git = {
enable = mkEnableOption "Git";
package = mkOption {
type = types.package;
default = pkgs.git;
defaultText = literalExpression "pkgs.git";
description = ''
Git package to install. Use <varname>pkgs.gitAndTools.gitFull</varname>
to gain access to <command>git send-email</command> for instance.
'';
};
userName = mkOption {
type = types.nullOr types.str;
default = null;
description = "Default user name to use.";
};
userEmail = mkOption {
type = types.nullOr types.str;
default = null;
description = "Default user email to use.";
};
aliases = mkOption {
type = types.attrsOf types.str;
default = { };
example = { co = "checkout"; };
description = "Git aliases to define.";
};
signing = mkOption {
type = types.nullOr signModule;
default = null;
description = "Options related to signing commits using GnuPG.";
};
extraConfig = mkOption {
type = types.either types.lines gitIniType;
default = { };
example = {
core = { whitespace = "trailing-space,space-before-tab"; };
url."ssh://git@host".insteadOf = "otherhost";
};
description = ''
Additional configuration to add. The use of string values is
deprecated and will be removed in the future.
'';
};
iniContent = mkOption {
type = gitIniType;
internal = true;
};
ignores = mkOption {
type = types.listOf types.str;
default = [ ];
example = [ "*~" "*.swp" ];
description = "List of paths that should be globally ignored.";
};
attributes = mkOption {
type = types.listOf types.str;
default = [ ];
example = [ "*.pdf diff=pdf" ];
description = "List of defining attributes set globally.";
};
includes = mkOption {
type = types.listOf includeModule;
default = [ ];
example = literalExpression ''
[
{ path = "~/path/to/config.inc"; }
{
path = "~/path/to/conditional.inc";
condition = "gitdir:~/src/dir";
}
]
'';
description = "List of configuration files to include.";
};
lfs = {
enable = mkEnableOption "Git Large File Storage";
skipSmudge = mkOption {
type = types.bool;
default = false;
description = ''
Skip automatic downloading of objects on clone or pull.
This requires a manual <command>git lfs pull</command>
every time a new commit is checked out on your repository.
'';
};
};
difftastic = {
enable = mkEnableOption "" // {
description = ''
Enable the <command>difft</command> syntax highlighter.
See <link xlink:href="https://github.com/Wilfred/difftastic" />.
'';
};
background = mkOption {
type = types.enum [ "light" "dark" ];
default = "light";
example = "dark";
description = ''
Determines whether difftastic should use the lighter or darker colors
for syntax highlithing.
'';
};
color = mkOption {
type = types.enum [ "always" "auto" "never" ];
default = "auto";
example = "always";
description = ''
Determines when difftastic should color its output.
'';
};
};
delta = {
enable = mkEnableOption "" // {
description = ''
Whether to enable the <command>delta</command> syntax highlighter.
See <link xlink:href="https://github.com/dandavison/delta" />.
'';
};
options = mkOption {
type = with types;
let
primitiveType = either str (either bool int);
sectionType = attrsOf primitiveType;
in attrsOf (either primitiveType sectionType);
default = { };
example = {
features = "decorations";
whitespace-error-style = "22 reverse";
decorations = {
commit-decoration-style = "bold yellow box ul";
file-style = "bold yellow ul";
file-decoration-style = "none";
};
};
description = ''
Options to configure delta.
'';
};
};
};
};
config = mkIf cfg.enable (mkMerge [
{
home.packages = [ cfg.package ];
assertions = [{
assertion = !(cfg.delta.enable && cfg.difftastic.enable);
message =
"Only one of 'programs.git.delta.enable' or 'programs.git.difftastic.enable' can be set to true at the same time.";
}];
programs.git.iniContent.user = {
name = mkIf (cfg.userName != null) cfg.userName;
email = mkIf (cfg.userEmail != null) cfg.userEmail;
};
xdg.configFile = {
"git/config".text = gitToIni cfg.iniContent;
"git/ignore" = mkIf (cfg.ignores != [ ]) {
text = concatStringsSep "\n" cfg.ignores + "\n";
};
"git/attributes" = mkIf (cfg.attributes != [ ]) {
text = concatStringsSep "\n" cfg.attributes + "\n";
};
};
}
{
programs.git.iniContent = let
hasSmtp = name: account: account.smtp != null;
genIdentity = name: account:
with account;
nameValuePair "sendemail.${name}" (if account.msmtp.enable then {
smtpServer = "${pkgs.msmtp}/bin/msmtp";
envelopeSender = "auto";
from = address;
} else
{
smtpEncryption = if smtp.tls.enable then
(if smtp.tls.useStartTls
|| versionOlder config.home.stateVersion "20.09" then
"tls"
else
"ssl")
else
"";
smtpSslCertPath =
mkIf smtp.tls.enable (toString smtp.tls.certificatesFile);
smtpServer = smtp.host;
smtpUser = userName;
from = address;
} // optionalAttrs (smtp.port != null) {
smtpServerPort = smtp.port;
});
in mapAttrs' genIdentity
(filterAttrs hasSmtp config.accounts.email.accounts);
}
(mkIf (cfg.signing != null) {
programs.git.iniContent = {
user.signingKey = mkIf (cfg.signing.key != null) cfg.signing.key;
commit.gpgSign = cfg.signing.signByDefault;
gpg.program = cfg.signing.gpgPath;
};
})
(mkIf (cfg.aliases != { }) { programs.git.iniContent.alias = cfg.aliases; })
(mkIf (lib.isAttrs cfg.extraConfig) {
programs.git.iniContent = cfg.extraConfig;
})
(mkIf (lib.isString cfg.extraConfig) {
warnings = [''
Using programs.git.extraConfig as a string option is
deprecated and will be removed in the future. Please
change to using it as an attribute set instead.
''];
xdg.configFile."git/config".text = cfg.extraConfig;
})
(mkIf (cfg.includes != [ ]) {
xdg.configFile."git/config".text = let
include = i:
with i;
if condition != null then {
includeIf.${condition}.path = "${path}";
} else {
include.path = "${path}";
};
in mkAfter
(concatStringsSep "\n" (map gitToIni (map include cfg.includes)));
})
(mkIf cfg.lfs.enable {
home.packages = [ pkgs.git-lfs ];
programs.git.iniContent.filter.lfs =
let skipArg = optional cfg.lfs.skipSmudge "--skip";
in {
clean = "git-lfs clean -- %f";
process =
concatStringsSep " " ([ "git-lfs" "filter-process" ] ++ skipArg);
required = true;
smudge = concatStringsSep " "
([ "git-lfs" "smudge" ] ++ skipArg ++ [ "--" "%f" ]);
};
})
(mkIf cfg.difftastic.enable {
home.packages = [ pkgs.difftastic ];
programs.git.iniContent = let
difftCommand =
"${pkgs.difftastic}/bin/difft --color ${cfg.difftastic.color} --background ${cfg.difftastic.background}";
in {
diff.external = difftCommand;
core.pager = "${pkgs.less}/bin/less -XF";
};
})
(mkIf cfg.delta.enable {
home.packages = [ pkgs.delta ];
programs.git.iniContent = let deltaCommand = "${pkgs.delta}/bin/delta";
in {
core.pager = deltaCommand;
interactive.diffFilter = "${deltaCommand} --color-only";
delta = cfg.delta.options;
};
})
]);
}