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#!/usr/bin/env bash
# shellcheck disable=SC2155
# Disabled "Declare and assign separately to avoid masking return values": https://github.com/koalaman/shellcheck/wiki/SC2155
#
# log <type> <msg>
#
log() {
printf " ${SGR_CYAN}%10s${SGR_RESET} : ${SGR_FAINT}%s${SGR_RESET}\n" "$1" "$2"
}
#
# verbose_log <type> <msg>
# Can suppress with --quiet.
# Like log but to stderr rather than stdout, so can also be used from "display" routines.
#
verbose_log() {
if [[ "${SHOW_VERBOSE_LOG}" == "true" ]]; then
>&2 printf " ${SGR_CYAN}%10s${SGR_RESET} : ${SGR_FAINT}%s${SGR_RESET}\n" "$1" "$2"
fi
}
#
# Exit with the given <msg ...>
#
abort() {
>&2 printf "\n ${SGR_RED}Error: %s${SGR_RESET}\n\n" "$*" && exit 1
}
#
# Synopsis: trace message ...
# Debugging output to stderr, not used in production code.
#
function trace() {
>&2 printf "trace: %s\n" "$*"
}
#
# Synopsis: echo_red message ...
# Highlight message in colour (on stdout).
#
function echo_red() {
printf "${SGR_RED}%s${SGR_RESET}\n" "$*"
}
#
# Synopsis: n_grep <args...>
# grep wrapper to ensure consistent grep options and circumvent aliases.
#
function n_grep() {
GREP_OPTIONS='' command grep "$@"
}
#
# Setup and state
#
VERSION="v8.0.2"
N_PREFIX="${N_PREFIX-/usr/local}"
N_PREFIX=${N_PREFIX%/}
readonly N_PREFIX
readonly CACHE_DIR=$N_PREFIX/n/versions
N_NODE_MIRROR=${N_NODE_MIRROR:-${NODE_MIRROR:-https://nodejs.org/dist}}
N_NODE_MIRROR=${N_NODE_MIRROR%/}
readonly N_NODE_MIRROR
N_NODE_DOWNLOAD_MIRROR=${N_NODE_DOWNLOAD_MIRROR:-https://nodejs.org/download}
N_NODE_DOWNLOAD_MIRROR=${N_NODE_DOWNLOAD_MIRROR%/}
readonly N_NODE_DOWNLOAD_MIRROR
# Using xz instead of gzip is enabled by default, if xz compatibility checks pass.
# User may set N_USE_XZ to 0 to disable, or set to anything else to enable.
# May also be overridden by command line flags.
# Normalise external values to true/false
if [[ "${N_USE_XZ}" = "0" ]]; then
N_USE_XZ="false"
elif [[ -n "${N_USE_XZ+defined}" ]]; then
N_USE_XZ="true"
fi
# Not setting to readonly. Overriden by CLI flags, and update_xz_settings_for_version.
N_MAX_REMOTE_MATCHES=${N_MAX_REMOTE_MATCHES:-20}
# modified by update_mirror_settings_for_version
g_mirror_url=${N_NODE_MIRROR}
g_mirror_folder_name="node"
# Options for curl and wget.
# Defining commands in variables is fraught (https://mywiki.wooledge.org/BashFAQ/050)
# but we can follow the simple case and store arguments in an array.
GET_SHOWS_PROGRESS="false"
# --location to follow redirects
# --fail to avoid happily downloading error page from web server for 404 et al
# --show-error to show why failed (on stderr)
CURL_OPTIONS=( "--location" "--fail" "--show-error" )
if [[ -t 1 ]]; then
CURL_OPTIONS+=( "--progress-bar" )
command -v curl &> /dev/null && GET_SHOWS_PROGRESS="true"
else
CURL_OPTIONS+=( "--silent" )
fi
WGET_OPTIONS=( "-q" "-O-" )
# Legacy support using unprefixed env. No longer documented in README.
if [ -n "$HTTP_USER" ];then
if [ -z "$HTTP_PASSWORD" ]; then
abort "Must specify HTTP_PASSWORD when supplying HTTP_USER"
fi
CURL_OPTIONS+=( "-u $HTTP_USER:$HTTP_PASSWORD" )
WGET_OPTIONS+=( "--http-password=$HTTP_PASSWORD"
"--http-user=$HTTP_USER" )
elif [ -n "$HTTP_PASSWORD" ]; then
abort "Must specify HTTP_USER when supplying HTTP_PASSWORD"
fi
# Set by set_active_node
g_active_node=
# set by various lookups to allow mixed logging and return value from function, especially for engine and node
g_target_node=
DOWNLOAD=false # set to opt-out of activate (install), and opt-in to download (run, exec)
ARCH=
SHOW_VERBOSE_LOG="true"
# ANSI escape codes
# https://en.wikipedia.org/wiki/ANSI_escape_code
# https://no-color.org
# https://bixense.com/clicolors
USE_COLOR="true"
if [[ -n "${CLICOLOR_FORCE+defined}" && "${CLICOLOR_FORCE}" != "0" ]]; then
USE_COLOR="true"
elif [[ -n "${NO_COLOR+defined}" || "${CLICOLOR}" = "0" || ! -t 1 ]]; then
USE_COLOR="false"
fi
readonly USE_COLOR
# Select Graphic Rendition codes
if [[ "${USE_COLOR}" = "true" ]]; then
# KISS and use codes rather than tput, avoid dealing with missing tput or TERM.
readonly SGR_RESET="\033[0m"
readonly SGR_FAINT="\033[2m"
readonly SGR_RED="\033[31m"
readonly SGR_CYAN="\033[36m"
else
readonly SGR_RESET=
readonly SGR_FAINT=
readonly SGR_RED=
readonly SGR_CYAN=
fi
#
# set_arch <arch> to override $(uname -a)
#
set_arch() {
if test -n "$1"; then
ARCH="$1"
else
abort "missing -a|--arch value"
fi
}
#
# Synopsis: set_insecure
# Globals modified:
# - CURL_OPTIONS
# - WGET_OPTIONS
#
function set_insecure() {
CURL_OPTIONS+=( "--insecure" )
WGET_OPTIONS+=( "--no-check-certificate" )
}
#
# Synposis: display_major_version numeric-version
#
display_major_version() {
local version=$1
version="${version#v}"
version="${version%%.*}"
echo "${version}"
}
#
# Synopsis: update_mirror_settings_for_version version
# e.g. <nightly/latest> means using download mirror and folder is nightly
# Globals modified:
# - g_mirror_url
# - g_mirror_folder_name
#
function update_mirror_settings_for_version() {
if is_download_folder "$1" ; then
g_mirror_folder_name="$1"
g_mirror_url="${N_NODE_DOWNLOAD_MIRROR}/${g_mirror_folder_name}"
elif is_download_version "$1"; then
[[ "$1" =~ ^([^/]+)/(.*) ]]
local remote_folder="${BASH_REMATCH[1]}"
g_mirror_folder_name="${remote_folder}"
g_mirror_url="${N_NODE_DOWNLOAD_MIRROR}/${g_mirror_folder_name}"
fi
}
#
# Synopsis: update_xz_settings_for_version numeric-version
# Globals modified:
# - N_USE_XZ
#
function update_xz_settings_for_version() {
# tarballs in xz format were available in later version of iojs, but KISS and only use xz from v4.
if [[ "${N_USE_XZ}" = "true" ]]; then
local major_version="$(display_major_version "$1")"
if [[ "${major_version}" -lt 4 ]]; then
N_USE_XZ="false"
fi
fi
}
#
# Synopsis: update_arch_settings_for_version numeric-version
# Globals modified:
# - ARCH
#
function update_arch_settings_for_version() {
local tarball_platform="$(display_tarball_platform)"
if [[ -z "${ARCH}" && "${tarball_platform}" = "darwin-arm64" ]]; then
# First native builds were for v16, but can use x64 in rosetta for older versions.
local major_version="$(display_major_version "$1")"
if [[ "${major_version}" -lt 16 ]]; then
ARCH=x64
fi
fi
}
#
# Synopsis: is_lts_codename version
#
function is_lts_codename() {
# https://github.com/nodejs/Release/blob/master/CODENAMES.md
# e.g. argon, Boron
[[ "$1" =~ ^([Aa]rgon|[Bb]oron|[Cc]arbon|[Dd]ubnium|[Ee]rbium|[Ff]ermium|[Gg]allium|[Hh]ydrogen|[Ii]ron)$ ]]
}
#
# Synopsis: is_download_folder version
#
function is_download_folder() {
# e.g. nightly
[[ "$1" =~ ^(next-nightly|nightly|rc|release|test|v8-canary)$ ]]
}
#
# Synopsis: is_download_version version
#
function is_download_version() {
# e.g. nightly/, nightly/latest, nightly/v11
if [[ "$1" =~ ^([^/]+)/(.*) ]]; then
local remote_folder="${BASH_REMATCH[1]}"
is_download_folder "${remote_folder}"
return
fi
return 2
}
#
# Synopsis: is_numeric_version version
#
function is_numeric_version() {
# e.g. 6, v7.1, 8.11.3
[[ "$1" =~ ^[v]{0,1}[0-9]+(\.[0-9]+){0,2}$ ]]
}
#
# Synopsis: is_exact_numeric_version version
#
function is_exact_numeric_version() {
# e.g. 6, v7.1, 8.11.3
[[ "$1" =~ ^[v]{0,1}[0-9]+\.[0-9]+\.[0-9]+$ ]]
}
#
# Synopsis: is_node_support_version version
# Reference: https://github.com/nodejs/package-maintenance/issues/236#issue-474783582
#
function is_node_support_version() {
[[ "$1" =~ ^(active|lts_active|lts_latest|lts|current|supported)$ ]]
}
#
# Synopsis: display_latest_node_support_alias version
# Map aliases onto existing n aliases, current and lts
#
function display_latest_node_support_alias() {
case "$1" in
"active") printf "current" ;;
"lts_active") printf "lts" ;;
"lts_latest") printf "lts" ;;
"lts") printf "lts" ;;
"current") printf "current" ;;
"supported") printf "current" ;;
*) printf "unexpected-version"
esac
}
#
# Functions used when showing versions installed
#
enter_fullscreen() {
# Set cursor to be invisible
tput civis 2> /dev/null
# Save screen contents
tput smcup 2> /dev/null
stty -echo
}
leave_fullscreen() {
# Set cursor to normal
tput cnorm 2> /dev/null
# Restore screen contents
tput rmcup 2> /dev/null
stty echo
}
handle_sigint() {
leave_fullscreen
S="$?"
kill 0
exit $S
}
handle_sigtstp() {
leave_fullscreen
kill -s SIGSTOP $$
}
#
# Output usage information.
#
display_help() {
cat <<-EOF
Usage: n [options] [COMMAND] [args]
Commands:
n Display downloaded Node.js versions and install selection
n latest Install the latest Node.js release (downloading if necessary)
n lts Install the latest LTS Node.js release (downloading if necessary)
n <version> Install Node.js <version> (downloading if necessary)
n install <version> Install Node.js <version> (downloading if necessary)
n run <version> [args ...] Execute downloaded Node.js <version> with [args ...]
n which <version> Output path for downloaded node <version>
n exec <vers> <cmd> [args...] Execute command with modified PATH, so downloaded node <version> and npm first
n rm <version ...> Remove the given downloaded version(s)
n prune Remove all downloaded versions except the installed version
n --latest Output the latest Node.js version available
n --lts Output the latest LTS Node.js version available
n ls Output downloaded versions
n ls-remote [version] Output matching versions available for download
n uninstall Remove the installed Node.js
Options:
-V, --version Output version of n
-h, --help Display help information
-p, --preserve Preserve npm and npx during install of Node.js
-q, --quiet Disable curl output. Disable log messages processing "auto" and "engine" labels.
-d, --download Download if necessary, and don't make active
-a, --arch Override system architecture
--all ls-remote displays all matches instead of last 20
--insecure Turn off certificate checking for https requests (may be needed from behind a proxy server)
--use-xz/--no-use-xz Override automatic detection of xz support and enable/disable use of xz compressed node downloads.
Aliases:
install: i
latest: current
ls: list
lsr: ls-remote
lts: stable
rm: -
run: use, as
which: bin
Versions:
Numeric version numbers can be complete or incomplete, with an optional leading 'v'.
Versions can also be specified by label, or codename,
and other downloadable releases by <remote-folder>/<version>
4.9.1, 8, v6.1 Numeric versions
lts Newest Long Term Support official release
latest, current Newest official release
auto Read version from file: .n-node-version, .node-version, .nvmrc, or package.json
engine Read version from package.json
boron, carbon Codenames for release streams
lts_latest Node.js support aliases
and nightly, rc/10 et al
EOF
}
err_no_installed_print_help() {
display_help
abort "no downloaded versions yet, see above help for commands"
}
#
# Synopsis: next_version_installed selected_version
# Output version after selected (which may be blank under some circumstances).
#
function next_version_installed() {
display_cache_versions | n_grep "$1" -A 1 | tail -n 1
}
#
# Synopsis: prev_version_installed selected_version
# Output version before selected (which may be blank under some circumstances).
#
function prev_version_installed() {
display_cache_versions | n_grep "$1" -B 1 | head -n 1
}
#
# Output n version.
#
display_n_version() {
echo "$VERSION" && exit 0
}
#
# Synopsis: set_active_node
# Checks cached downloads for a binary matching the active node.
# Globals modified:
# - g_active_node
#
function set_active_node() {
g_active_node=
local node_path="$(command -v node)"
if [[ -x "${node_path}" ]]; then
local installed_version=$(node --version)
installed_version=${installed_version#v}
for dir in "${CACHE_DIR}"/*/ ; do
local folder_name="${dir%/}"
folder_name="${folder_name##*/}"
if diff &> /dev/null \
"${CACHE_DIR}/${folder_name}/${installed_version}/bin/node" \
"${node_path}" ; then
g_active_node="${folder_name}/${installed_version}"
break
fi
done
fi
}
#
# Display sorted versions directories paths.
#
display_versions_paths() {
find "$CACHE_DIR" -maxdepth 2 -type d \
| sed 's|'"$CACHE_DIR"'/||g' \
| n_grep -E "/[0-9]+\.[0-9]+\.[0-9]+" \
| sed 's|/|.|' \
| sort -k 1,1 -k 2,2n -k 3,3n -k 4,4n -t . \
| sed 's|\.|/|'
}
#
# Display installed versions with <selected>
#
display_versions_with_selected() {
local selected="$1"
echo
for version in $(display_versions_paths); do
if test "$version" = "$selected"; then
printf " ${SGR_CYAN}ο${SGR_RESET} %s\n" "$version"
else
printf " ${SGR_FAINT}%s${SGR_RESET}\n" "$version"
fi
done
echo
printf "Use up/down arrow keys to select a version, return key to install, d to delete, q to quit"
}
#
# Synopsis: display_cache_versions
#
function display_cache_versions() {
for folder_and_version in $(display_versions_paths); do
echo "${folder_and_version}"
done
}
#
# Display current node --version and others installed.
#
menu_select_cache_versions() {
enter_fullscreen
set_active_node
local selected="${g_active_node}"
clear
display_versions_with_selected "${selected}"
trap handle_sigint INT
trap handle_sigtstp SIGTSTP
ESCAPE_SEQ=$'\033'
UP=$'A'
DOWN=$'B'
CTRL_P=$'\020'
CTRL_N=$'\016'
while true; do
read -rsn 1 key
case "$key" in
"$ESCAPE_SEQ")
# Handle ESC sequences followed by other characters, i.e. arrow keys
read -rsn 1 -t 1 tmp
# See "[" if terminal in normal mode, and "0" in application mode
if [[ "$tmp" == "[" || "$tmp" == "O" ]]; then
read -rsn 1 -t 1 arrow
case "$arrow" in
"$UP")
clear
selected="$(prev_version_installed "${selected}")"
display_versions_with_selected "${selected}"
;;
"$DOWN")
clear
selected="$(next_version_installed "${selected}")"
display_versions_with_selected "${selected}"
;;
esac
fi
;;
"d")
if [[ -n "${selected}" ]]; then
clear
# Note: prev/next is constrained to min/max
local after_delete_selection="$(next_version_installed "${selected}")"
if [[ "${after_delete_selection}" == "${selected}" ]]; then
after_delete_selection="$(prev_version_installed "${selected}")"
fi
remove_versions "${selected}"
if [[ "${after_delete_selection}" == "${selected}" ]]; then
clear
leave_fullscreen
echo "All downloaded versions have been deleted from cache."
exit
fi
selected="${after_delete_selection}"
display_versions_with_selected "${selected}"
fi
;;
# Vim or Emacs 'up' key
"k"|"$CTRL_P")
clear
selected="$(prev_version_installed "${selected}")"
display_versions_with_selected "${selected}"
;;
# Vim or Emacs 'down' key
"j"|"$CTRL_N")
clear
selected="$(next_version_installed "${selected}")"
display_versions_with_selected "${selected}"
;;
"q")
clear
leave_fullscreen
exit
;;
"")
# enter key returns empty string
leave_fullscreen
[[ -n "${selected}" ]] && activate "${selected}"
exit
;;
esac
done
}
#
# Move up a line and erase.
#
erase_line() {
printf "\033[1A\033[2K"
}
#
# Disable PaX mprotect for <binary>
#
disable_pax_mprotect() {
test -z "$1" && abort "binary required"
local binary="$1"
# try to disable mprotect via XATTR_PAX header
local PAXCTL="$(PATH="/sbin:/usr/sbin:$PATH" command -v paxctl-ng 2>&1)"
local PAXCTL_ERROR=1
if [ -x "$PAXCTL" ]; then
$PAXCTL -l && $PAXCTL -m "$binary" >/dev/null 2>&1
PAXCTL_ERROR="$?"
fi
# try to disable mprotect via PT_PAX header
if [ "$PAXCTL_ERROR" != 0 ]; then
PAXCTL="$(PATH="/sbin:/usr/sbin:$PATH" command -v paxctl 2>&1)"
if [ -x "$PAXCTL" ]; then
$PAXCTL -Cm "$binary" >/dev/null 2>&1
fi
fi
}
#
# clean_copy_folder <source> <target>
#
clean_copy_folder() {
local source="$1"
local target="$2"
if [[ -d "${source}" ]]; then
rm -rf "${target}"
cp -fR "${source}" "${target}"
fi
}
#
# Activate <version>
#
activate() {
local version="$1"
local dir="$CACHE_DIR/$version"
local original_node="$(command -v node)"
local installed_node="${N_PREFIX}/bin/node"
# Ideally we would just copy from cache to N_PREFIX, but there are some complications
# - various linux versions use symlinks for folders in /usr/local and also error when copy folder onto symlink
# - we have used cp for years, so keep using it for backwards compatibility (instead of say rsync)
# - we allow preserving npm
# - we want to be somewhat robust to changes in tarball contents, so use find instead of hard-code expected subfolders
#
# This code was purist and concise for a long time.
# Now twice as much code, but using same code path for all uses, and supporting more setups.
# Copy lib before bin so symlink targets exist.
# lib
mkdir -p "$N_PREFIX/lib"
# Copy everything except node_modules.
find "$dir/lib" -mindepth 1 -maxdepth 1 \! -name node_modules -exec cp -fR "{}" "$N_PREFIX/lib" \;
if [[ -z "${N_PRESERVE_NPM}" ]]; then
mkdir -p "$N_PREFIX/lib/node_modules"
# Copy just npm, skipping possible added global modules after download. Clean copy to avoid version change problems.
clean_copy_folder "$dir/lib/node_modules/npm" "$N_PREFIX/lib/node_modules/npm"
fi
# Takes same steps for corepack (experimental in node 16.9.0) as for npm, to avoid version problems.
if [[ -e "$dir/lib/node_modules/corepack" ]]; then
mkdir -p "$N_PREFIX/lib/node_modules"
clean_copy_folder "$dir/lib/node_modules/corepack" "$N_PREFIX/lib/node_modules/corepack"
fi
# bin
mkdir -p "$N_PREFIX/bin"
# Remove old node to avoid potential problems with firewall getting confused on Darwin by overwrite.
rm -f "$N_PREFIX/bin/node"
# Copy bin items by hand, in case user has installed global npm modules into cache.
cp -f "$dir/bin/node" "$N_PREFIX/bin"
[[ -e "$dir/bin/node-waf" ]] && cp -f "$dir/bin/node-waf" "$N_PREFIX/bin" # v0.8.x
[[ -e "$dir/bin/corepack" ]] && cp -fR "$dir/bin/corepack" "$N_PREFIX/bin" # from 16.9.0
if [[ -z "${N_PRESERVE_NPM}" ]]; then
[[ -e "$dir/bin/npm" ]] && cp -fR "$dir/bin/npm" "$N_PREFIX/bin"
[[ -e "$dir/bin/npx" ]] && cp -fR "$dir/bin/npx" "$N_PREFIX/bin"
fi
# include
mkdir -p "$N_PREFIX/include"
find "$dir/include" -mindepth 1 -maxdepth 1 -exec cp -fR "{}" "$N_PREFIX/include" \;
# share
mkdir -p "$N_PREFIX/share"
# Copy everything except man, at it is a symlink on some Linux (e.g. archlinux).
find "$dir/share" -mindepth 1 -maxdepth 1 \! -name man -exec cp -fR "{}" "$N_PREFIX/share" \;
mkdir -p "$N_PREFIX/share/man"
find "$dir/share/man" -mindepth 1 -maxdepth 1 -exec cp -fR "{}" "$N_PREFIX/share/man" \;
disable_pax_mprotect "${installed_node}"
local active_node="$(command -v node)"
if [[ -e "${active_node}" && -e "${installed_node}" && "${active_node}" != "${installed_node}" ]]; then
# Installed and active are different which might be a PATH problem. List both to give user some clues.
log "installed" "$("${installed_node}" --version) to ${installed_node}"
log "active" "$("${active_node}" --version) at ${active_node}"
else
local npm_version_str=""
local installed_npm="${N_PREFIX}/bin/npm"
local active_npm="$(command -v npm)"
if [[ -z "${N_PRESERVE_NPM}" && -e "${active_npm}" && -e "${installed_npm}" && "${active_npm}" = "${installed_npm}" ]]; then
npm_version_str=" (with npm $(npm --version))"
fi
log "installed" "$("${installed_node}" --version)${npm_version_str}"
# Extra tips for changed location.
if [[ -e "${active_node}" && -e "${original_node}" && "${active_node}" != "${original_node}" ]]; then
printf '\nNote: the node command changed location and the old location may be remembered in your current shell.\n'
log old "${original_node}"
log new "${active_node}"
printf 'If "node --version" shows the old version then start a new shell, or reset the location hash with:\nhash -r (for bash, zsh, ash, dash, and ksh)\nrehash (for csh and tcsh)\n'
fi
fi
}
#
# Install <version>
#
install() {
[[ -z "$1" ]] && abort "version required"
local version
get_latest_resolved_version "$1" || return 2
version="${g_target_node}"
[[ -n "${version}" ]] || abort "no version found for '$1'"
update_mirror_settings_for_version "$1"
update_xz_settings_for_version "${version}"
update_arch_settings_for_version "${version}"
local dir="${CACHE_DIR}/${g_mirror_folder_name}/${version}"
# Note: decompression flags ignored with default Darwin tar which autodetects.
if test "$N_USE_XZ" = "true"; then
local tarflag="-Jx"
else
local tarflag="-zx"
fi
if test -d "$dir"; then
if [[ ! -e "$dir/n.lock" ]] ; then
if [[ "$DOWNLOAD" == "false" ]] ; then
activate "${g_mirror_folder_name}/${version}"
fi
exit
fi
fi
log installing "${g_mirror_folder_name}-v$version"
local url="$(tarball_url "$version")"
is_ok "${url}" || abort "download preflight failed for '$version' (${url})"
log mkdir "$dir"
mkdir -p "$dir" || abort "sudo required (or change ownership, or define N_PREFIX)"
touch "$dir/n.lock"
cd "${dir}" || abort "Failed to cd to ${dir}"
log fetch "$url"
do_get "${url}" | tar "$tarflag" --strip-components=1 --no-same-owner -f -
pipe_results=( "${PIPESTATUS[@]}" )
if [[ "${pipe_results[0]}" -ne 0 ]]; then
abort "failed to download archive for $version"
fi
if [[ "${pipe_results[1]}" -ne 0 ]]; then
abort "failed to extract archive for $version"
fi
[ "$GET_SHOWS_PROGRESS" = "true" ] && erase_line
rm -f "$dir/n.lock"
disable_pax_mprotect bin/node
if [[ "$DOWNLOAD" == "false" ]]; then
activate "${g_mirror_folder_name}/$version"
fi
}
#
# Be more silent.
#
set_quiet() {
SHOW_VERBOSE_LOG="false"
command -v curl > /dev/null && CURL_OPTIONS+=( "--silent" ) && GET_SHOWS_PROGRESS="false"
}
#
# Synopsis: do_get [option...] url
# Call curl or wget with combination of global and passed options.
#
function do_get() {
if command -v curl &> /dev/null; then
curl "${CURL_OPTIONS[@]}" "$@"
elif command -v wget &> /dev/null; then
wget "${WGET_OPTIONS[@]}" "$@"
else
abort "curl or wget command required"
fi
}
#
# Synopsis: do_get_index [option...] url
# Call curl or wget with combination of global and passed options,
# with options tweaked to be more suitable for getting index.
#
function do_get_index() {
if command -v curl &> /dev/null; then
# --silent to suppress progress et al
curl --silent --compressed "${CURL_OPTIONS[@]}" "$@"
elif command -v wget &> /dev/null; then
wget "${WGET_OPTIONS[@]}" "$@"
else
abort "curl or wget command required"
fi
}
#
# Synopsis: remove_versions version ...
#
function remove_versions() {
[[ -z "$1" ]] && abort "version(s) required"
while [[ $# -ne 0 ]]; do
local version
get_latest_resolved_version "$1" || break
version="${g_target_node}"
if [[ -n "${version}" ]]; then
update_mirror_settings_for_version "$1"
local dir="${CACHE_DIR}/${g_mirror_folder_name}/${version}"
if [[ -s "${dir}" ]]; then
rm -rf "${dir}"
else
echo "$1 (${version}) not in downloads cache"
fi
else
echo "No version found for '$1'"
fi
shift
done
}
#
# Synopsis: prune_cache
#
function prune_cache() {
set_active_node
for folder_and_version in $(display_versions_paths); do
if [[ "${folder_and_version}" != "${g_active_node}" ]]; then
echo "${folder_and_version}"
rm -rf "${CACHE_DIR:?}/${folder_and_version}"
fi
done
}
#
# Synopsis: find_cached_version version
# Finds cache directory for resolved version.
# Globals modified:
# - g_cached_version
function find_cached_version() {
[[ -z "$1" ]] && abort "version required"
local version
get_latest_resolved_version "$1" || exit 1
version="${g_target_node}"
[[ -n "${version}" ]] || abort "no version found for '$1'"
update_mirror_settings_for_version "$1"
g_cached_version="${CACHE_DIR}/${g_mirror_folder_name}/${version}"
if [[ ! -d "${g_cached_version}" && "${DOWNLOAD}" == "true" ]]; then
(install "${version}")
fi
[[ -d "${g_cached_version}" ]] || abort "'$1' (${version}) not in downloads cache"
}
#
# Synopsis: display_bin_path_for_version version
#
function display_bin_path_for_version() {
find_cached_version "$1"
echo "${g_cached_version}/bin/node"
}
#
# Synopsis: run_with_version version [args...]
# Run the given <version> of node with [args ..]
#
function run_with_version() {
find_cached_version "$1"
shift # remove version from parameters
exec "${g_cached_version}/bin/node" "$@"
}
#
# Synopsis: exec_with_version <version> command [args...]
# Modify the path to include <version> and execute command.
#
function exec_with_version() {
find_cached_version "$1"
shift # remove version from parameters
PATH="${g_cached_version}/bin:$PATH" exec "$@"
}
#
# Synopsis: is_ok url
# Check the HEAD response of <url>.
#
function is_ok() {
# Note: both curl and wget can follow redirects, as present on some mirrors (e.g. https://npm.taobao.org/mirrors/node).
# The output is complicated with redirects, so keep it simple and use command status rather than parse output.
if command -v curl &> /dev/null; then
do_get --silent --head "$1" > /dev/null || return 1
else
do_get --spider "$1" > /dev/null || return 1
fi
}
#
# Synopsis: can_use_xz
# Test system to see if xz decompression is supported by tar.
#
function can_use_xz() {
# Be conservative and only enable if xz is likely to work. Unfortunately we can't directly query tar itself.
# For research, see https://github.com/shadowspawn/nvh/issues/8
local uname_s="$(uname -s)"
if [[ "${uname_s}" = "Linux" ]] && command -v xz &> /dev/null ; then
# tar on linux is likely to support xz if it is available as a command
return 0
elif [[ "${uname_s}" = "Darwin" ]]; then
local macos_version="$(sw_vers -productVersion)"
local macos_major_version="$(echo "${macos_version}" | cut -d '.' -f 1)"
local macos_minor_version="$(echo "${macos_version}" | cut -d '.' -f 2)"
if [[ "${macos_major_version}" -gt 10 || "${macos_minor_version}" -gt 8 ]]; then
# tar on recent Darwin has xz support built-in
return 0
fi
fi
return 2 # not supported
}
#
# Synopsis: display_tarball_platform
#
function display_tarball_platform() {
# https://en.wikipedia.org/wiki/Uname
local os="unexpected_os"
local uname_a="$(uname -a)"
case "${uname_a}" in
Linux*) os="linux" ;;
Darwin*) os="darwin" ;;
SunOS*) os="sunos" ;;
AIX*) os="aix" ;;
CYGWIN*) >&2 echo_red "Cygwin is not supported by n" ;;
MINGW*) >&2 echo_red "Git BASH (MSYS) is not supported by n" ;;
esac