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fish: autogenerate completions from man pages

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hyperfekt 2018-12-17 12:57:30 +01:00 committed by Robert Helgesson
parent a7affc93ba
commit 6f422785c3
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1 changed files with 73 additions and 1 deletions
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74
modules/programs/fish.nix
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@ -21,6 +21,15 @@ in
programs.fish = {
enable = mkEnableOption "fish friendly interactive shell";
package = mkOption {
default = pkgs.fish;
defaultText = "pkgs.fish";
description = ''
The fish package to install. May be used to change the version.
'';
type = types.package;
};
shellAliases = mkOption {
default = {};
description = ''
@ -74,7 +83,70 @@ in
};
config = mkIf cfg.enable {
home.packages = [ pkgs.fish ];
home.packages = [ cfg.package ];
xdg.dataFile."fish/home-manager_generated_completions".source =
let
# paths later in the list will overwrite those already linked
destructiveSymlinkJoin =
args_@{ name
, paths
, preferLocalBuild ? true
, allowSubstitutes ? false
, postBuild ? ""
, ...
}:
let
args = removeAttrs args_ [ "name" "postBuild" ]
// { inherit preferLocalBuild allowSubstitutes; }; # pass the defaults
in pkgs.runCommand name args
''
mkdir -p $out
for i in $paths; do
if [ -z "$(find $i -prune -empty)" ]; then
cp -srf $i/* $out
fi
done
${postBuild}
'';
generateCompletions = package: pkgs.runCommand
"${package.name}-fish-completions"
{
src = package;
nativeBuildInputs = [ pkgs.python2 ];
buildInputs = [ cfg.package ];
preferLocalBuild = true;
allowSubstitutes = false;
}
''
mkdir -p $out
if [ -d $src/share/man ]; then
find $src/share/man -type f \
| xargs python ${cfg.package}/share/fish/tools/create_manpage_completions.py --directory $out \
> /dev/null
fi
'';
in
destructiveSymlinkJoin {
name = "${config.home.username}-fish-completions";
paths =
let
cmp = (a: b: (a.meta.priority or 0) > (b.meta.priority or 0));
in
map generateCompletions (sort cmp config.home.packages);
};
programs.fish.interactiveShellInit = ''
# add completions generated by Home Manager to $fish_complete_path
begin
set -l joined (string join " " $fish_complete_path)
set -l prev_joined (string replace --regex "[^\s]*generated_completions.*" "" $joined)
set -l post_joined (string replace $prev_joined "" $joined)
set -l prev (string split " " (string trim $prev_joined))
set -l post (string split " " (string trim $post_joined))
set fish_complete_path $prev "${config.xdg.dataHome}/fish/home-manager_generated_completions" $post
end
'';
xdg.configFile."fish/config.fish".text = ''
# ~/.config/fish/config.fish: DO NOT EDIT -- this file has been generated automatically.