home-manager/lib/bash/home-manager.sh
Robert Helgesson 8cbc6500df
lib/bash: make call to tput more robust
Specifically, if `tput colors` fails with an error we treat that as if
the terminal does not support colors.

Fixes #423

Suggested-by: PhotonQuantum <self@lightquantum.me>
2022-10-13 11:56:47 +02:00

86 lines
1.8 KiB
Bash

#!/usr/bin/env bash
#
# This file contains a number of utilities for use by the home-manager tool and
# the generated Home Manager activation scripts. No guarantee is made about
# backwards or forward compatibility.
#
# Sets up colors suitable for the `errorEcho`, `warnEcho`, and `noteEcho`
# functions.
#
# The check for terminal output and color support is heavily inspired by
# https://unix.stackexchange.com/a/10065.
#
# The setup respects the `NO_COLOR` environment variable.
function setupColors() {
normalColor=""
errorColor=""
warnColor=""
noteColor=""
# Enable colors for terminals, and allow opting out.
if [[ ! -v NO_COLOR && -t 1 ]]; then
# See if it supports colors.
local ncolors
ncolors=$(tput colors 2> /dev/null || echo 0)
if [[ -n "$ncolors" && "$ncolors" -ge 8 ]]; then
normalColor="$(tput sgr0)"
errorColor="$(tput bold)$(tput setaf 1)"
warnColor="$(tput setaf 3)"
noteColor="$(tput bold)$(tput setaf 6)"
fi
fi
}
setupColors
function errorEcho() {
echo "${errorColor}$*${normalColor}"
}
function warnEcho() {
echo "${warnColor}$*${normalColor}"
}
function noteEcho() {
echo "${noteColor}$*${normalColor}"
}
function _i() {
local msgid="$1"
shift
# shellcheck disable=2059
printf "$(gettext "$msgid")\n" "$@"
}
function _ip() {
local msgid="$1"
local msgidPlural="$2"
local count="$3"
shift 3
# shellcheck disable=2059
printf "$(ngettext "$msgid" "$msgidPlural" "$count")\n" "$@"
}
function _iError() {
echo -n "${errorColor}"
_i "$@"
echo -n "${normalColor}"
}
function _iWarn() {
echo -n "${warnColor}"
_i "$@"
echo -n "${normalColor}"
}
function _iNote() {
echo -n "${noteColor}"
_i "$@"
echo -n "${normalColor}"
}