https://www.jianshu.com/p/188166a113c1
#!/usr/bin/env bash
{ # this ensures the entire script is downloaded #
nvm_has() {
type "$1" > /dev/null 2>&1
}
nvm_install_dir() {
printf %s "${NVM_DIR:-"$HOME/.nvm"}"
}
nvm_latest_version() {
echo "v0.33.8"
}
nvm_profile_is_bash_or_zsh() {
local TEST_PROFILE
TEST_PROFILE="${1-}"
case "${TEST_PROFILE-}" in
*"/.bashrc" | *"/.bash_profile" | *"/.zshrc")
return
;;
*)
return 1
;;
esac
}
#
# Outputs the location to NVM depending on:
# * The availability of $NVM_SOURCE
# * The method used ("script" or "git" in the script, defaults to "git")
# NVM_SOURCE always takes precedence unless the method is "script-nvm-exec"
#
nvm_source() {
local NVM_METHOD
NVM_METHOD="$1"
local NVM_SOURCE_URL
NVM_SOURCE_URL="$NVM_SOURCE"
if [ "_$NVM_METHOD" = "_script-nvm-exec" ]; then
NVM_SOURCE_URL="https://raw.githubusercontent.com/creationix/nvm/$(nvm_latest_version)/nvm-exec"
elif [ "_$NVM_METHOD" = "_script-nvm-bash-completion" ]; then
NVM_SOURCE_URL="https://raw.githubusercontent.com/creationix/nvm/$(nvm_latest_version)/bash_completion"
elif [ -z "$NVM_SOURCE_URL" ]; then
if [ "_$NVM_METHOD" = "_script" ]; then
NVM_SOURCE_URL="https://raw.githubusercontent.com/creationix/nvm/$(nvm_latest_version)/nvm.sh"
elif [ "_$NVM_METHOD" = "_git" ] || [ -z "$NVM_METHOD" ]; then
NVM_SOURCE_URL="https://github.com/creationix/nvm.git"
else
echo >&2 "Unexpected value \"$NVM_METHOD\" for \$NVM_METHOD"
return 1
fi
fi
echo "$NVM_SOURCE_URL"
}
#
# Node.js version to install
#
nvm_node_version() {
echo "$NODE_VERSION"
}
nvm_download() {
if nvm_has "curl"; then
curl --compressed -q "$@"
elif nvm_has "wget"; then
# Emulate curl with wget
ARGS=$(echo "$*" | command sed -e 's/--progress-bar /--progress=bar /' \
-e 's/-L //' \
-e 's/--compressed //' \
-e 's/-I /--server-response /' \
-e 's/-s /-q /' \
-e 's/-o /-O /' \
-e 's/-C - /-c /')
# shellcheck disable=SC2086
eval wget $ARGS
fi
}
install_nvm_from_git() {
local INSTALL_DIR
INSTALL_DIR="$(nvm_install_dir)"
if [ -d "$INSTALL_DIR/.git" ]; then
echo "=> nvm is already installed in $INSTALL_DIR, trying to update using git"
command printf "\r=> "
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" fetch origin tag "$(nvm_latest_version)" --depth=1 2> /dev/null || {
echo >&2 "Failed to update nvm, run 'git fetch' in $INSTALL_DIR yourself."
exit 1
}
else
# Cloning to $INSTALL_DIR
echo "=> Downloading nvm from git to '$INSTALL_DIR'"
command printf "\r=> "
mkdir -p "${INSTALL_DIR}"
if [ "$(ls -A "${INSTALL_DIR}")" ]; then
command git init "${INSTALL_DIR}" || {
echo >&2 'Failed to initialize nvm repo. Please report this!'
exit 2
}
command git --git-dir="${INSTALL_DIR}/.git" remote add origin "$(nvm_source)" 2> /dev/null \
|| command git --git-dir="${INSTALL_DIR}/.git" remote set-url origin "$(nvm_source)" || {
echo >&2 'Failed to add remote "origin" (or set the URL). Please report this!'
exit 2
}
command git --git-dir="${INSTALL_DIR}/.git" fetch origin tag "$(nvm_latest_version)" --depth=1 || {
echo >&2 'Failed to fetch origin with tags. Please report this!'
exit 2
}
else
command git clone "$(nvm_source)" -b "$(nvm_latest_version)" --depth=1 "${INSTALL_DIR}" || {
echo >&2 'Failed to clone nvm repo. Please report this!'
exit 2
}
fi
fi
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" checkout -f --quiet "$(nvm_latest_version)"
if [ ! -z "$(command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" show-ref refs/heads/master)" ]; then
if command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch --quiet 2>/dev/null; then
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch --quiet -D master >/dev/null 2>&1
else
echo >&2 "Your version of git is out of date. Please update it!"
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" branch -D master >/dev/null 2>&1
fi
fi
echo "=> Compressing and cleaning up git repository"
if ! command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" reflog expire --expire=now --all; then
echo >&2 "Your version of git is out of date. Please update it!"
fi
if ! command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" gc --auto --aggressive --prune=now ; then
echo >&2 "Your version of git is out of date. Please update it!"
fi
return
}
#
# Automatically install Node.js
#
nvm_install_node() {
local NODE_VERSION_LOCAL
NODE_VERSION_LOCAL="$(nvm_node_version)"
if [ -z "$NODE_VERSION_LOCAL" ]; then
return 0
fi
echo "=> Installing Node.js version $NODE_VERSION_LOCAL"
nvm install "$NODE_VERSION_LOCAL"
local CURRENT_NVM_NODE
CURRENT_NVM_NODE="$(nvm_version current)"
if [ "$(nvm_version "$NODE_VERSION_LOCAL")" == "$CURRENT_NVM_NODE" ]; then
echo "=> Node.js version $NODE_VERSION_LOCAL has been successfully installed"
else
echo >&2 "Failed to install Node.js $NODE_VERSION_LOCAL"
fi
}
install_nvm_as_script() {
local INSTALL_DIR
INSTALL_DIR="$(nvm_install_dir)"
local NVM_SOURCE_LOCAL
NVM_SOURCE_LOCAL="$(nvm_source script)"
local NVM_EXEC_SOURCE
NVM_EXEC_SOURCE="$(nvm_source script-nvm-exec)"
local NVM_BASH_COMPLETION_SOURCE
NVM_BASH_COMPLETION_SOURCE="$(nvm_source script-nvm-bash-completion)"
# Downloading to $INSTALL_DIR
mkdir -p "$INSTALL_DIR"
if [ -f "$INSTALL_DIR/nvm.sh" ]; then
echo "=> nvm is already installed in $INSTALL_DIR, trying to update the script"
else
echo "=> Downloading nvm as script to '$INSTALL_DIR'"
fi
nvm_download -s "$NVM_SOURCE_LOCAL" -o "$INSTALL_DIR/nvm.sh" || {
echo >&2 "Failed to download '$NVM_SOURCE_LOCAL'"
return 1
} &
nvm_download -s "$NVM_EXEC_SOURCE" -o "$INSTALL_DIR/nvm-exec" || {
echo >&2 "Failed to download '$NVM_EXEC_SOURCE'"
return 2
} &
nvm_download -s "$NVM_BASH_COMPLETION_SOURCE" -o "$INSTALL_DIR/bash_completion" || {
echo >&2 "Failed to download '$NVM_BASH_COMPLETION_SOURCE'"
return 2
} &
for job in $(jobs -p | sort)
do
wait "$job" || return $?
done
chmod a+x "$INSTALL_DIR/nvm-exec" || {
echo >&2 "Failed to mark '$INSTALL_DIR/nvm-exec' as executable"
return 3
}
}
nvm_try_profile() {
if [ -z "${1-}" ] || [ ! -f "${1}" ]; then
return 1
fi
echo "${1}"
}
#
# Detect profile file if not specified as environment variable
# (eg: PROFILE=~/.myprofile)
# The echo'ed path is guaranteed to be an existing file
# Otherwise, an empty string is returned
#
nvm_detect_profile() {
if [ -n "${PROFILE}" ] && [ -f "${PROFILE}" ]; then
echo "${PROFILE}"
return
fi
local DETECTED_PROFILE
DETECTED_PROFILE=''
local SHELLTYPE
SHELLTYPE="$(basename "/$SHELL")"
if [ "$SHELLTYPE" = "bash" ]; then
if [ -f "$HOME/.bashrc" ]; then
DETECTED_PROFILE="$HOME/.bashrc"
elif [ -f "$HOME/.bash_profile" ]; then
DETECTED_PROFILE="$HOME/.bash_profile"
fi
elif [ "$SHELLTYPE" = "zsh" ]; then
DETECTED_PROFILE="$HOME/.zshrc"
fi
if [ -z "$DETECTED_PROFILE" ]; then
for EACH_PROFILE in ".profile" ".bashrc" ".bash_profile" ".zshrc"
do
if DETECTED_PROFILE="$(nvm_try_profile "${HOME}/${EACH_PROFILE}")"; then
break
fi
done
fi
if [ ! -z "$DETECTED_PROFILE" ]; then
echo "$DETECTED_PROFILE"
fi
}
#
# Check whether the user has any globally-installed npm modules in their system
# Node, and warn them if so.
#
nvm_check_global_modules() {
command -v npm >/dev/null 2>&1 || return 0
local NPM_VERSION
NPM_VERSION="$(npm --version)"
NPM_VERSION="${NPM_VERSION:--1}"
[ "${NPM_VERSION%%[!-0-9]*}" -gt 0 ] || return 0
local NPM_GLOBAL_MODULES
NPM_GLOBAL_MODULES="$(
npm list -g --depth=0 |
command sed -e '/ npm@/d' -e '/ (empty)$/d'
)"
local MODULE_COUNT
MODULE_COUNT="$(
command printf %s\\n "$NPM_GLOBAL_MODULES" |
command sed -ne '1!p' | # Remove the first line
wc -l | tr -d ' ' # Count entries
)"
if [ "${MODULE_COUNT}" != '0' ]; then
# shellcheck disable=SC2016
echo '=> You currently have modules installed globally with `npm`. These will no'
# shellcheck disable=SC2016
echo '=> longer be linked to the active version of Node when you install a new node'
# shellcheck disable=SC2016
echo '=> with `nvm`; and they may (depending on how you construct your `$PATH`)'
# shellcheck disable=SC2016
echo '=> override the binaries of modules installed with `nvm`:'
echo
command printf %s\\n "$NPM_GLOBAL_MODULES"
echo '=> If you wish to uninstall them at a later point (or re-install them under your'
# shellcheck disable=SC2016
echo '=> `nvm` Nodes), you can remove them from the system Node as follows:'
echo
echo ' $ nvm use system'
echo ' $ npm uninstall -g a_module'
echo
fi
}
nvm_do_install() {
if [ -z "${METHOD}" ]; then
# Autodetect install method
if nvm_has git; then
install_nvm_from_git
elif nvm_has nvm_download; then
install_nvm_as_script
else
echo >&2 'You need git, curl, or wget to install nvm'
exit 1
fi
elif [ "${METHOD}" = 'git' ]; then
if ! nvm_has git; then
echo >&2 "You need git to install nvm"
exit 1
fi
install_nvm_from_git
elif [ "${METHOD}" = 'script' ]; then
if ! nvm_has nvm_download; then
echo >&2 "You need curl or wget to install nvm"
exit 1
fi
install_nvm_as_script
fi
echo
local NVM_PROFILE
NVM_PROFILE="$(nvm_detect_profile)"
local PROFILE_INSTALL_DIR
PROFILE_INSTALL_DIR="$(nvm_install_dir| sed "s:^$HOME:\$HOME:")"
SOURCE_STR="\nexport NVM_DIR=\"${PROFILE_INSTALL_DIR}\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && \\. \"\$NVM_DIR/nvm.sh\" # This loads nvm\n"
COMPLETION_STR="[ -s \"\$NVM_DIR/bash_completion\" ] && \\. \"\$NVM_DIR/bash_completion\" # This loads nvm bash_completion\n"
BASH_OR_ZSH=false
if [ -z "${NVM_PROFILE-}" ] ; then
local TRIED_PROFILE
if [ -n "${PROFILE}" ]; then
TRIED_PROFILE="${NVM_PROFILE} (as defined in \$PROFILE), "
fi
echo "=> Profile not found. Tried ${TRIED_PROFILE-}~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile."
echo "=> Create one of them and run this script again"
echo " OR"
echo "=> Append the following lines to the correct file yourself:"
command printf "${SOURCE_STR}"
else
if nvm_profile_is_bash_or_zsh "${NVM_PROFILE-}"; then
BASH_OR_ZSH=true
fi
if ! command grep -qc '/nvm.sh' "$NVM_PROFILE"; then
echo "=> Appending nvm source string to $NVM_PROFILE"
command printf "${SOURCE_STR}" >> "$NVM_PROFILE"
else
echo "=> nvm source string already in ${NVM_PROFILE}"
fi
# shellcheck disable=SC2016
if ${BASH_OR_ZSH} && ! command grep -qc '$NVM_DIR/bash_completion' "$NVM_PROFILE"; then
echo "=> Appending bash_completion source string to $NVM_PROFILE"
command printf "$COMPLETION_STR" >> "$NVM_PROFILE"
else
echo "=> bash_completion source string already in ${NVM_PROFILE}"
fi
fi
if ${BASH_OR_ZSH} && [ -z "${NVM_PROFILE-}" ] ; then
echo "=> Please also append the following lines to the if you are using bash/zsh shell:"
command printf "${COMPLETION_STR}"
fi
# Source nvm
# shellcheck source=/dev/null
\. "$(nvm_install_dir)/nvm.sh"
nvm_check_global_modules
nvm_install_node
nvm_reset
echo "=> Close and reopen your terminal to start using nvm or run the following to use it now:"
command printf "${SOURCE_STR}"
if ${BASH_OR_ZSH} ; then
command printf "${COMPLETION_STR}"
fi
}
#
# Unsets the various functions defined
# during the execution of the install script
#
nvm_reset() {
unset -f nvm_has nvm_install_dir nvm_latest_version nvm_profile_is_bash_or_zsh \
nvm_source nvm_node_version nvm_download install_nvm_from_git nvm_install_node \
install_nvm_as_script nvm_try_profile nvm_detect_profile nvm_check_global_modules \
nvm_do_install nvm_reset
}
[ "_$NVM_ENV" = "_testing" ] || nvm_do_install
} # this ensures the entire script is downloaded #
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