try_sudo
This commit is contained in:
Ajeet D'Souza
parent
da7a6b7621
commit
3ac6f5aede
227
install.sh
227
install.sh
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@ -7,30 +7,6 @@
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# It runs on Unix shells like {a,ba,da,k,z}sh. It uses the common `local`
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# extension. Note: Most shells limit `local` to 1 var per line, contra bash.
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usage() {
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# heredocs are not defined in POSIX.
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local _text_heading _text_reset
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_text_heading="$(tput bold || true 2>/dev/null)$(tput smul || true 2>/dev/null)"
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_text_reset="$(tput sgr0 || true 2>/dev/null)"
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echo "\
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${_text_heading}zoxide installer${_text_reset}
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Ajeet D'Souza <98ajeet@gmail.com>
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https://github.com/ajeetdsouza/zoxide
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Fetches and installs zoxide. If zoxide is already installed, it will be updated to the latest version.
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${_text_heading}Usage:${_text_reset}
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install.sh [OPTIONS]
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${_text_heading}Options:${_text_reset}
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--arch Override the architecture identified by the installer
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--bin-dir Override the installation directory [default: ${_bin_dir}]
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--man-dir Override the manpage installation directory [default: ${_man_dir}]
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--sudo Override the command used to elevate to root privileges [default: sudo]
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-h, --help Print help"
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}
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main() {
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# The version of ksh93 that ships with many illumos systems does not support the "local"
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# extension. Print a message rather than fail in subtle ways later on:
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@ -38,30 +14,17 @@ main() {
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err 'the installer does not work with this ksh93 version; please try bash'
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fi
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set -u
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# local is not a POSIX builtin, so it may not be available.
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if [ "$(command -v -- local 2>/dev/null || true)" != "local" ]; then
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err 'the installer does not work with this shell; please try bash'
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fi
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set -u
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parse_args "$@"
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# Note: these variables are used in the usage message!
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local _bin_dir="${HOME}/.local/bin"
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local _man_dir="${HOME}/.local/share/man"
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parse_args "$@" # sets global variables (BIN_DIR, MAN_DIR, ARCH, SUDO)
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_bin_dir=${BIN_DIR:-${_bin_dir}}
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_man_dir=${MAN_DIR:-${_man_dir}}
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if [ -n "${ARCH:-}" ]; then
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# if the user specifed, trust them - don't error on unrecognized hardware.
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local _arch="${ARCH}"
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else
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# Detect and print host target triple.
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ensure get_architecture
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local _arch="${RETVAL}"
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fi
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local _arch
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_arch="${ARCH:-$(ensure get_architecture)}"
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assert_nz "${_arch}" "arch"
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echo "Detected architecture: ${_arch}"
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@ -71,27 +34,14 @@ main() {
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*) _bin_name="zoxide" ;;
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esac
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local _sudo
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if test_writeable "${_bin_dir}"; then
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echo "Installing zoxide, please wait…"
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_sudo=''
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else
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echo "Escalated permissions are required to install to ${_bin_dir}"
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_sudo=${SUDO:-"sudo"}
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if [ "${_sudo}" = 'sudo' ]; then
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elevate_priv # only check if the user didn't provide it, blindly trust user provided values
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fi
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echo "Installing zoxide as root, please wait…"
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fi
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# Create and enter a temporary directory.
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local _tmp_dir
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_tmp_dir="$(mktemp -d)" || err "mktemp: could not create temporary directory"
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cd "${_tmp_dir}" || err "cd: failed to enter directory: ${_tmp_dir}"
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# Download and extract zoxide.
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ensure download_zoxide "${_arch}"
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local _package="${RETVAL}"
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local _package
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_package="$(ensure download_zoxide "${_arch}")"
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assert_nz "${_package}" "package"
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echo "Downloaded package: ${_package}"
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case "${_package}" in
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@ -109,42 +59,77 @@ main() {
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esac
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# Install binary.
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# shellcheck disable=SC2086 # The lack of quoting is intentional. This may not be the best way to do it, but it's hard to properly do in POSIX
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{
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ensure ${_sudo} mkdir -p -- "${_bin_dir}"
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ensure ${_sudo} cp -- "${_bin_name}" "${_bin_dir}"
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ensure ${_sudo} chmod +x -- "${_bin_dir}/${_bin_name}"
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}
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echo "Installed zoxide to ${_bin_dir}"
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if test_writeable "${_man_dir}"; then
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echo "Installing zoxide man pages, please wait…"
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_sudo=""
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else
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echo "Escalated permissions are required to install man pages to ${_man_dir}"
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_sudo=${SUDO:-"sudo"}
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if [ "${_sudo}" = 'sudo' ]; then
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elevate_priv # only check if the user didn't provide it, blindly trust user provided values
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fi
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echo "Installing zoxide man pages as root, please wait…"
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fi
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ensure try_sudo mkdir -p -- "${BIN_DIR}"
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ensure try_sudo cp -- "${_bin_name}" "${BIN_DIR}/${_bin_name}"
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ensure try_sudo chmod +x -- "${BIN_DIR}/${_bin_name}"
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echo "Installed zoxide to ${BIN_DIR}"
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# Install manpages.
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# shellcheck disable=SC2086 # The lack of quoting is intentional.
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{
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ensure ${_sudo} mkdir -p -- "${_man_dir}/man1"
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ensure ${_sudo} cp -- "man/man1/"* "${_man_dir}/man1/"
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}
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echo "Installed manpages to ${_man_dir}"
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ensure try_sudo mkdir -p -- "${MAN_DIR}/man1"
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ensure try_sudo cp -- "man/man1/"* "${MAN_DIR}/man1/"
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echo "Installed manpages to ${MAN_DIR}"
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# Print success message and check $PATH.
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echo ""
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echo "zoxide is installed!"
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if ! echo ":${PATH}:" | grep -Fq ":${_bin_dir}:"; then
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echo "NOTE: ${_bin_dir} is not on your \$PATH. zoxide will not work unless it is added to \$PATH."
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if ! echo ":${PATH}:" | grep -Fq ":${BIN_DIR}:"; then
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echo "Note: ${BIN_DIR} is not on your \$PATH. zoxide will not work unless it is added to \$PATH."
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fi
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}
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# Parse the arguments passed and set variables accordingly.
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parse_args() {
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BIN_DIR_DEFAULT="${HOME}/.local/bin"
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MAN_DIR_DEFAULT="${HOME}/.local/share/man"
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SUDO_DEFAULT="sudo"
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BIN_DIR="${BIN_DIR_DEFAULT}"
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MAN_DIR="${MAN_DIR_DEFAULT}"
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SUDO="${SUDO_DEFAULT}"
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while [ "$#" -gt 0 ]; do
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case "$1" in
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--arch) ARCH="$2" && shift 2 ;;
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--arch=*) ARCH="${1#*=}" && shift 1 ;;
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--bin-dir) BIN_DIR="$2" && shift 2 ;;
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--bin-dir=*) BIN_DIR="${1#*=}" && shift 1 ;;
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--man-dir) MAN_DIR="$2" && shift 2 ;;
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--man-dir=*) MAN_DIR="${1#*=}" && shift 1 ;;
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--sudo) SUDO="$2" && shift 2 ;;
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--sudo=*) SUDO="${1#*=}" && shift 1 ;;
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-h | --help) usage && exit 0 ;;
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*) err "Unknown option: $1" ;;
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esac
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done
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}
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usage() {
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# heredocs are not defined in POSIX.
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local _text_heading _text_reset
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_text_heading="$(tput bold || true 2>/dev/null)$(tput smul || true 2>/dev/null)"
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_text_reset="$(tput sgr0 || true 2>/dev/null)"
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local _arch
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_arch="$(get_architecture || true)"
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echo "\
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${_text_heading}zoxide installer${_text_reset}
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Ajeet D'Souza <98ajeet@gmail.com>
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https://github.com/ajeetdsouza/zoxide
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Fetches and installs zoxide. If zoxide is already installed, it will be updated to the latest version.
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${_text_heading}Usage:${_text_reset}
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install.sh [OPTIONS]
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${_text_heading}Options:${_text_reset}
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--arch Override the architecture identified by the installer [current: ${_arch}]
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--bin-dir Override the installation directory [default: ${BIN_DIR_DEFAULT}]
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--man-dir Override the manpage installation directory [default: ${MAN_DIR_DEFAULT}]
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--sudo Override the command used to elevate to root privileges [default: ${SUDO_DEFAULT}]
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-h, --help Print help"
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}
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download_zoxide() {
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local _arch="$1"
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@ -187,7 +172,30 @@ download_zoxide() {
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*) err "unsupported downloader: ${_dld}" ;;
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esac
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RETVAL="${_package}"
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echo "${_package}"
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}
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try_sudo() {
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if "$@" >/dev/null 2>&1; then
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return 0
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fi
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need_sudo
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"${SUDO}" "$@"
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}
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need_sudo() {
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if ! check_cmd "${SUDO}"; then
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err "\
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could not find the command \`${SUDO}\` needed to get permissions for install.
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If you are on Windows, please run your shell as an administrator, then rerun this script.
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Otherwise, please run this script as root, or install \`sudo\`."
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fi
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if ! "${SUDO}" -v; then
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err "sudo permissions not granted, aborting installation"
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fi
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}
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# The below functions have been extracted with minor modifications from the
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@ -369,7 +377,7 @@ get_architecture() {
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fi
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_arch="${_cputype}-${_ostype}"
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RETVAL="${_arch}"
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echo "${_arch}"
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}
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get_bitness() {
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@ -456,53 +464,6 @@ err() {
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exit 1
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}
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elevate_priv() {
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if ! check_cmd sudo; then
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echo 'Could not find the command "sudo", needed to get permissions for install.' >&2
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echo "If you are on Windows, please run your shell as an administrator, then" >&2
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echo "rerun this script. Otherwise, please run this script as root, or install" >&2
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echo "sudo." >&2
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exit 1
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fi
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if ! sudo -v; then
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err "Superuser not granted, aborting installation"
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fi
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}
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# Test if a location is writeable by trying to write to it. Windows does not let
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# you test writeability other than by writing: https://stackoverflow.com/q/1999988
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test_writeable() {
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if [ -z "${1-}" ]; then
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return 1 # an empty path should never be writeable
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fi
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path="$1/test.txt"
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if touch -- "${path}" 2>/dev/null; then
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rm -- "${path}"
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return 0
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else
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return 1
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fi
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}
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# parse the arguments passed and set the environment variables accordingly
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parse_args() {
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# parse argv variables
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while [ "$#" -gt 0 ]; do
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case "$1" in
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--arch) ARCH="$2" && shift 2 ;;
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--arch=*) ARCH="${1#*=}" && shift 1 ;;
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--bin-dir) BIN_DIR="$2" && shift 2 ;;
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--bin-dir=*) BIN_DIR="${1#*=}" && shift 1 ;;
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--man-dir) MAN_DIR="$2" && shift 2 ;;
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--man-dir=*) MAN_DIR="${1#*=}" && shift 1 ;;
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--sudo) SUDO="$2" && shift 2 ;;
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--sudo=*) SUDO="${1#*=}" && shift 1 ;;
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-h | --help) usage && exit 0 ;;
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*) err "Unknown option: $1" ;;
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esac
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done
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}
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# This is put in braces to ensure that the script does not run until it is
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# downloaded completely.
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{
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