d8ef13fc13
https://github.com/koalaman/shellcheck/wiki/SC2086 Double quote to prevent globbing and word splitting. https://github.com/koalaman/shellcheck/wiki/SC2166 Prefer `[ p ] && [ q ]` as `[ p -a q ]` is not well defined. Signed-off-by: Anders Kaseorg <andersk@mit.edu>
96 lines
2.5 KiB
Nix
96 lines
2.5 KiB
Nix
# This module provides suggestions of packages to install if the user
|
|
# tries to run a missing command in Bash. This is implemented using a
|
|
# SQLite database that maps program names to Nix package names (e.g.,
|
|
# "pdflatex" is mapped to "tetex").
|
|
|
|
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
cfg = config.programs.command-not-found;
|
|
commandNotFound = pkgs.substituteAll {
|
|
name = "command-not-found";
|
|
dir = "bin";
|
|
src = ./command-not-found.pl;
|
|
isExecutable = true;
|
|
inherit (cfg) dbPath;
|
|
perl = pkgs.perl.withPackages (p: [ p.DBDSQLite p.StringShellQuote ]);
|
|
};
|
|
|
|
in
|
|
|
|
{
|
|
options.programs.command-not-found = {
|
|
|
|
enable = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether interactive shells should show which Nix package (if
|
|
any) provides a missing command.
|
|
'';
|
|
};
|
|
|
|
dbPath = mkOption {
|
|
default = "/nix/var/nix/profiles/per-user/root/channels/nixos/programs.sqlite" ;
|
|
description = ''
|
|
Absolute path to programs.sqlite.
|
|
|
|
By default this file will be provided by your channel
|
|
(nixexprs.tar.xz).
|
|
'';
|
|
type = types.path;
|
|
};
|
|
};
|
|
|
|
config = mkIf cfg.enable {
|
|
programs.bash.interactiveShellInit =
|
|
''
|
|
# This function is called whenever a command is not found.
|
|
command_not_found_handle() {
|
|
local p='${commandNotFound}/bin/command-not-found'
|
|
if [ -x "$p" ] && [ -f '${cfg.dbPath}' ]; then
|
|
# Run the helper program.
|
|
"$p" "$@"
|
|
# Retry the command if we just installed it.
|
|
if [ $? = 126 ]; then
|
|
"$@"
|
|
else
|
|
return 127
|
|
fi
|
|
else
|
|
echo "$1: command not found" >&2
|
|
return 127
|
|
fi
|
|
}
|
|
'';
|
|
|
|
programs.zsh.interactiveShellInit =
|
|
''
|
|
# This function is called whenever a command is not found.
|
|
command_not_found_handler() {
|
|
local p='${commandNotFound}/bin/command-not-found'
|
|
if [ -x "$p" ] && [ -f '${cfg.dbPath}' ]; then
|
|
# Run the helper program.
|
|
"$p" "$@"
|
|
|
|
# Retry the command if we just installed it.
|
|
if [ $? = 126 ]; then
|
|
"$@"
|
|
else
|
|
return 127
|
|
fi
|
|
else
|
|
# Indicate than there was an error so ZSH falls back to its default handler
|
|
echo "$1: command not found" >&2
|
|
return 127
|
|
fi
|
|
}
|
|
'';
|
|
|
|
environment.systemPackages = [ commandNotFound ];
|
|
};
|
|
|
|
}
|