444 lines
14 KiB
Nix
444 lines
14 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.fish;
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pluginModule = types.submodule ({ config, ... }: {
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options = {
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src = mkOption {
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type = types.path;
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description = ''
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Path to the plugin folder.
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</para><para>
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Relevant pieces will be added to the fish function path and
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the completion path. The <filename>init.fish</filename> and
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<filename>key_binding.fish</filename> files are sourced if
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they exist.
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'';
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};
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name = mkOption {
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type = types.str;
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description = ''
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The name of the plugin.
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'';
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};
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};
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});
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functionModule = types.submodule {
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options = {
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body = mkOption {
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type = types.lines;
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description = ''
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The function body.
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'';
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};
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argumentNames = mkOption {
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type = with types; nullOr (either str (listOf str));
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default = null;
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description = ''
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Assigns the value of successive command line arguments to the names
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given.
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'';
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};
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description = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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A description of what the function does, suitable as a completion
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description.
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'';
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};
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wraps = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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Causes the function to inherit completions from the given wrapped
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command.
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'';
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};
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onEvent = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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Tells fish to run this function when the specified named event is
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emitted. Fish internally generates named events e.g. when showing the
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prompt.
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'';
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};
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onVariable = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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Tells fish to run this function when the specified variable changes
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value.
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'';
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};
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onJobExit = mkOption {
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type = with types; nullOr (either str int);
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default = null;
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description = ''
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Tells fish to run this function when the job with the specified group
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ID exits. Instead of a PID, the stringer <literal>caller</literal> can
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be specified. This is only legal when in a command substitution, and
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will result in the handler being triggered by the exit of the job
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which created this command substitution.
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'';
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};
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onProcessExit = mkOption {
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type = with types; nullOr (either str int);
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default = null;
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example = "$fish_pid";
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description = ''
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Tells fish to run this function when the fish child process with the
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specified process ID exits. Instead of a PID, for backwards
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compatibility, <literal>%self</literal> can be specified as an alias
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for <literal>$fish_pid</literal>, and the function will be run when
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the current fish instance exits.
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'';
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};
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onSignal = mkOption {
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type = with types; nullOr (either str int);
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default = null;
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example = [ "SIGHUP" "HUP" 1 ];
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description = ''
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Tells fish to run this function when the specified signal is
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delievered. The signal can be a signal number or signal name.
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'';
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};
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noScopeShadowing = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Allows the function to access the variables of calling functions.
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'';
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};
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inheritVariable = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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Snapshots the value of the specified variable and defines a local
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variable with that same name and value when the function is defined.
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'';
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};
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};
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};
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abbrsStr = concatStringsSep "\n"
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(mapAttrsToList (k: v: "abbr --add --global -- ${k} ${escapeShellArg v}")
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cfg.shellAbbrs);
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aliasesStr = concatStringsSep "\n"
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(mapAttrsToList (k: v: "alias ${k} ${escapeShellArg v}") cfg.shellAliases);
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in {
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options = {
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programs.fish = {
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enable = mkEnableOption "fish, the friendly interactive shell";
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package = mkOption {
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type = types.package;
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default = pkgs.fish;
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defaultText = literalExpression "pkgs.fish";
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description = ''
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The fish package to install. May be used to change the version.
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'';
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};
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shellAliases = mkOption {
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type = with types; attrsOf str;
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default = { };
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example = literalExpression ''
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{
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g = "git";
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"..." = "cd ../..";
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}
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'';
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description = ''
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An attribute set that maps aliases (the top level attribute names
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in this option) to command strings or directly to build outputs.
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'';
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};
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shellAbbrs = mkOption {
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type = with types; attrsOf str;
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default = { };
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example = {
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l = "less";
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gco = "git checkout";
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};
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description = ''
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An attribute set that maps aliases (the top level attribute names
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in this option) to abbreviations. Abbreviations are expanded with
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the longer phrase after they are entered.
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'';
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};
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shellInit = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Shell script code called during fish shell
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initialisation.
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'';
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};
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loginShellInit = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Shell script code called during fish login shell
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initialisation.
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'';
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};
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interactiveShellInit = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Shell script code called during interactive fish shell
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initialisation.
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'';
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};
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promptInit = mkOption {
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type = types.lines;
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default = "";
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description = ''
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Shell script code used to initialise fish prompt.
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'';
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};
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};
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programs.fish.plugins = mkOption {
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type = types.listOf pluginModule;
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default = [ ];
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example = literalExpression ''
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[
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{
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name = "z";
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src = pkgs.fetchFromGitHub {
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owner = "jethrokuan";
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repo = "z";
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rev = "ddeb28a7b6a1f0ec6dae40c636e5ca4908ad160a";
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sha256 = "0c5i7sdrsp0q3vbziqzdyqn4fmp235ax4mn4zslrswvn8g3fvdyh";
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};
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}
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# oh-my-fish plugins are stored in their own repositories, which
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# makes them simple to import into home-manager.
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{
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name = "fasd";
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src = pkgs.fetchFromGitHub {
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owner = "oh-my-fish";
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repo = "plugin-fasd";
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rev = "38a5b6b6011106092009549e52249c6d6f501fba";
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sha256 = "06v37hqy5yrv5a6ssd1p3cjd9y3hnp19d3ab7dag56fs1qmgyhbs";
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};
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}
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]
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'';
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description = ''
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The plugins to source in
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<filename>conf.d/99plugins.fish</filename>.
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'';
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};
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programs.fish.functions = mkOption {
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type = with types; attrsOf (either lines functionModule);
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default = { };
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example = literalExpression ''
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{
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__fish_command_not_found_handler = {
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body = "__fish_default_command_not_found_handler $argv[1]";
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onEvent = "fish_command_not_found";
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};
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gitignore = "curl -sL https://www.gitignore.io/api/$argv";
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}
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'';
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description = ''
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Basic functions to add to fish. For more information see
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<link xlink:href="https://fishshell.com/docs/current/cmds/function.html"/>.
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'';
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};
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};
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config = mkIf cfg.enable (mkMerge [
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{
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home.packages = [ cfg.package ];
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xdg.dataFile."fish/home-manager_generated_completions".source = let
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# paths later in the list will overwrite those already linked
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destructiveSymlinkJoin = args_@{ name, paths, preferLocalBuild ? true
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, allowSubstitutes ? false, postBuild ? "", ... }:
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let
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args = removeAttrs args_ [ "name" "postBuild" ] // {
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# pass the defaults
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inherit preferLocalBuild allowSubstitutes;
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};
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in pkgs.runCommand name args ''
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mkdir -p $out
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for i in $paths; do
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if [ -z "$(find $i -prune -empty)" ]; then
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cp -srf $i/* $out
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fi
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done
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${postBuild}
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'';
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generateCompletions = package:
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pkgs.runCommand "${package.name}-fish-completions" {
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src = package;
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nativeBuildInputs = [ pkgs.python2 ];
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buildInputs = [ cfg.package ];
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preferLocalBuild = true;
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allowSubstitutes = false;
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} ''
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mkdir -p $out
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if [ -d $src/share/man ]; then
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find $src/share/man -type f \
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| xargs python ${cfg.package}/share/fish/tools/create_manpage_completions.py --directory $out \
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> /dev/null
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fi
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'';
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in destructiveSymlinkJoin {
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name = "${config.home.username}-fish-completions";
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paths =
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let cmp = (a: b: (a.meta.priority or 0) > (b.meta.priority or 0));
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in map generateCompletions (sort cmp config.home.packages);
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};
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programs.fish.interactiveShellInit = ''
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# add completions generated by Home Manager to $fish_complete_path
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begin
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set -l joined (string join " " $fish_complete_path)
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set -l prev_joined (string replace --regex "[^\s]*generated_completions.*" "" $joined)
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set -l post_joined (string replace $prev_joined "" $joined)
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set -l prev (string split " " (string trim $prev_joined))
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set -l post (string split " " (string trim $post_joined))
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set fish_complete_path $prev "${config.xdg.dataHome}/fish/home-manager_generated_completions" $post
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end
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'';
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xdg.configFile."fish/config.fish".text = ''
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# ~/.config/fish/config.fish: DO NOT EDIT -- this file has been generated
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# automatically by home-manager.
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# Only execute this file once per shell.
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set -q __fish_home_manager_config_sourced; and exit
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set -g __fish_home_manager_config_sourced 1
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set --prepend fish_function_path ${pkgs.fishPlugins.foreign-env}/share/fish/vendor_functions.d
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fenv source ${config.home.profileDirectory}/etc/profile.d/hm-session-vars.sh > /dev/null
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set -e fish_function_path[1]
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${cfg.shellInit}
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status --is-login; and begin
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# Login shell initialisation
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${cfg.loginShellInit}
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end
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status --is-interactive; and begin
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# Abbreviations
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${abbrsStr}
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# Aliases
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${aliasesStr}
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# Prompt initialisation
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${cfg.promptInit}
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# Interactive shell intialisation
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${cfg.interactiveShellInit}
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end
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'';
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}
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{
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xdg.configFile = mapAttrs' (name: def: {
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name = "fish/functions/${name}.fish";
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value = {
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text = let
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modifierStr = n: v: optional (v != null) ''--${n}="${toString v}"'';
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modifierStrs = n: v: optional (v != null) "--${n}=${toString v}";
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modifierBool = n: v: optional (v != null && v) "--${n}";
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mods = with def;
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modifierStr "description" description ++ modifierStr "wraps" wraps
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++ modifierStr "on-event" onEvent
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++ modifierStr "on-variable" onVariable
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++ modifierStr "on-job-exit" onJobExit
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++ modifierStr "on-process-exit" onProcessExit
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++ modifierStr "on-signal" onSignal
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++ modifierBool "no-scope-shadowing" noScopeShadowing
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++ modifierStr "inherit-variable" inheritVariable
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++ modifierStrs "argument-names" argumentNames;
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modifiers = if isAttrs def then " ${toString mods}" else "";
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body = if isAttrs def then def.body else def;
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in ''
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function ${name}${modifiers}
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${body}
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end
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'';
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};
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}) cfg.functions;
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}
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# Each plugin gets a corresponding conf.d/plugin-NAME.fish file to load
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# in the paths and any initialization scripts.
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(mkIf (length cfg.plugins > 0) {
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xdg.configFile = mkMerge ((map (plugin: {
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"fish/conf.d/plugin-${plugin.name}.fish".text = ''
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# Plugin ${plugin.name}
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set -l plugin_dir ${plugin.src}
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# Set paths to import plugin components
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if test -d $plugin_dir/functions
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set fish_function_path $fish_function_path[1] $plugin_dir/functions $fish_function_path[2..-1]
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end
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if test -d $plugin_dir/completions
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set fish_complete_path $fish_complete_path[1] $plugin_dir/completions $fish_complete_path[2..-1]
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end
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# Source initialization code if it exists.
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if test -d $plugin_dir/conf.d
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for f in $plugin_dir/conf.d/*.fish
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source $f
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end
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end
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if test -f $plugin_dir/key_bindings.fish
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source $plugin_dir/key_bindings.fish
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end
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if test -f $plugin_dir/init.fish
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source $plugin_dir/init.fish
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end
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'';
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}) cfg.plugins));
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})
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]);
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}
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