nvm/install.sh

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#!/usr/bin/env bash
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{ # this ensures the entire script is downloaded #
nvm_has() {
type "$1" > /dev/null 2>&1
}
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nvm_install_dir() {
echo ${NVM_DIR:-"$HOME/.nvm"}
}
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nvm_latest_version() {
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echo "v0.31.3"
}
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#
# 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"
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#
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 [ -z "$NVM_SOURCE_URL" ]; then
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if [ "_$NVM_METHOD" = "_script" ]; then
NVM_SOURCE_URL="https://raw.githubusercontent.com/creationix/nvm/$(nvm_latest_version)/nvm.sh"
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elif [ "_$NVM_METHOD" = "_git" ] || [ -z "$NVM_METHOD" ]; then
NVM_SOURCE_URL="https://github.com/creationix/nvm.git"
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else
echo >&2 "Unexpected value \"$NVM_METHOD\" for \$NVM_METHOD"
return 1
fi
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fi
echo "$NVM_SOURCE_URL"
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}
#
# Node.js version to install
#
nvm_node_version() {
echo "$NODE_VERSION"
}
nvm_download() {
if nvm_has "curl"; then
curl -q $*
elif nvm_has "wget"; then
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# Emulate curl with wget
ARGS=$(echo "$*" | command sed -e 's/--progress-bar /--progress=bar /' \
-e 's/-L //' \
-e 's/-I /--server-response /' \
-e 's/-s /-q /' \
-e 's/-o /-O /' \
-e 's/-C - /-c /')
wget $ARGS
fi
}
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install_nvm_from_git() {
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local INSTALL_DIR
INSTALL_DIR="$(nvm_install_dir)"
if [ -d "$INSTALL_DIR/.git" ]; then
echo "=> nvm is already installed in $INSTALL_DIR, trying to update using git"
printf "\r=> "
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" fetch 2> /dev/null || {
echo >&2 "Failed to update nvm, run 'git fetch' in $INSTALL_DIR yourself."
exit 1
}
else
# Cloning to $NVM_DIR
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echo "=> Downloading nvm from git to '$INSTALL_DIR'"
printf "\r=> "
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mkdir -p "$INSTALL_DIR"
command git clone "$(nvm_source)" "$INSTALL_DIR" || {
echo >&2 "Failed to clone nvm repo. Please report this!"
exit 1
}
fi
command git --git-dir="$INSTALL_DIR"/.git --work-tree="$INSTALL_DIR" checkout --quiet "$(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="$INSTALL_DIR" branch -D master >/dev/null 2>&1
fi
fi
return
}
#
# Automatically install Node.js
#
nvm_install_node() {
local NODE_VERSION
NODE_VERSION="$(nvm_node_version)"
if [ -z "$NODE_VERSION" ]; then
echo "=> You can now install Node.js by running \`nvm install\`"
return 0
fi
echo "=> Installing Node.js version $NODE_VERSION"
nvm install "$NODE_VERSION"
local CURRENT_NVM_NODE
CURRENT_NVM_NODE="$(nvm_version current)"
if [ "$(nvm_version "$NODE_VERSION")" == "$CURRENT_NVM_NODE" ]; then
echo "=> Node.js version $NODE_VERSION has been successfully installed"
else
echo >&2 "Failed to install Node.js $NODE_VERSION"
fi
}
install_nvm_as_script() {
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local INSTALL_DIR
INSTALL_DIR="$(nvm_install_dir)"
local NVM_SOURCE_LOCAL
NVM_SOURCE_LOCAL=$(nvm_source script)
local NVM_EXEC_SOURCE
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NVM_EXEC_SOURCE=$(nvm_source script-nvm-exec)
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# Downloading to $INSTALL_DIR
mkdir -p "$INSTALL_DIR"
if [ -f "$INSTALL_DIR/nvm.sh" ]; then
echo "=> nvm is already installed in $INSTALL_DIR, trying to update the script"
else
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echo "=> Downloading nvm as script to '$INSTALL_DIR'"
fi
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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 "$NVM_DIR/nvm-exec" || {
echo >&2 "Failed to download '$NVM_EXEC_SOURCE'"
return 2
}
chmod a+x "$NVM_DIR/nvm-exec" || {
echo >&2 "Failed to mark '$NVM_DIR/nvm-exec' as executable"
return 3
}
}
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#
# 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 "$PROFILE" -a -f "$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
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if [ -z "$DETECTED_PROFILE" ]; then
if [ -f "$HOME/.profile" ]; then
DETECTED_PROFILE="$HOME/.profile"
elif [ -f "$HOME/.bashrc" ]; then
DETECTED_PROFILE="$HOME/.bashrc"
elif [ -f "$HOME/.bash_profile" ]; then
DETECTED_PROFILE="$HOME/.bash_profile"
elif [ -f "$HOME/.zshrc" ]; then
DETECTED_PROFILE="$HOME/.zshrc"
fi
fi
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if [ ! -z "$DETECTED_PROFILE" ]; then
echo "$DETECTED_PROFILE"
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fi
}
#
# Check whether the user has any globally-installed npm modules in their system
# Node, and warn them if so.
#
nvm_check_global_modules() {
command -v npm >/dev/null 2>&1 || return 0
local NPM_VERSION
NPM_VERSION="$(npm --version)"
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NPM_VERSION="${NPM_VERSION:--1}"
[ "${NPM_VERSION%%[!-0-9]*}" -gt 0 ] || return 0
local NPM_GLOBAL_MODULES
NPM_GLOBAL_MODULES="$(
npm list -g --depth=0 |
sed '/ npm@/d' |
sed '/ (empty)$/d'
)"
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local MODULE_COUNT
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MODULE_COUNT="$(
printf %s\\n "$NPM_GLOBAL_MODULES" |
sed -ne '1!p' | # Remove the first line
wc -l | tr -d ' ' # Count entries
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)"
if [ $MODULE_COUNT -ne 0 ]; then
cat <<-'END_MESSAGE'
=> You currently have modules installed globally with `npm`. These will no
=> longer be linked to the active version of Node when you install a new node
=> with `nvm`; and they may (depending on how you construct your `$PATH`)
=> override the binaries of modules installed with `nvm`:
END_MESSAGE
printf %s\\n "$NPM_GLOBAL_MODULES"
cat <<-'END_MESSAGE'
=> If you wish to uninstall them at a later point (or re-install them under your
=> `nvm` Nodes), you can remove them from the system Node as follows:
$ nvm use system
$ npm uninstall -g a_module
END_MESSAGE
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 [ "~$METHOD" = "~script" ]; then
if ! nvm_has "nvm_download"; then
echo >&2 "You need curl or wget to install nvm"
exit 1
fi
install_nvm_as_script
fi
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echo
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local NVM_PROFILE
NVM_PROFILE=$(nvm_detect_profile)
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local INSTALL_DIR
INSTALL_DIR="$(nvm_install_dir)"
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SOURCE_STR="\nexport NVM_DIR=\"$INSTALL_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\" # This loads nvm"
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if [ -z "$NVM_PROFILE" ] ; then
echo "=> Profile not found. Tried $NVM_PROFILE (as defined in \$PROFILE), ~/.bashrc, ~/.bash_profile, ~/.zshrc, and ~/.profile."
echo "=> Create one of them and run this script again"
echo "=> Create it (touch $NVM_PROFILE) and run this script again"
echo " OR"
echo "=> Append the following lines to the correct file yourself:"
printf "$SOURCE_STR"
echo
else
if ! command grep -qc '/nvm.sh' "$NVM_PROFILE"; then
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echo "=> Appending source string to $NVM_PROFILE"
printf "$SOURCE_STR\n" >> "$NVM_PROFILE"
else
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echo "=> Source string already in $NVM_PROFILE"
fi
fi
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# Sourcing $PROFILE to take into account the new environment
. "$NVM_PROFILE"
nvm_check_global_modules
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nvm_install_node
nvm_reset
}
#
# Unsets the various functions defined
# during the execution of the install script
#
nvm_reset() {
unset -f nvm_reset nvm_has nvm_latest_version \
nvm_source nvm_download install_nvm_as_script install_nvm_from_git \
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nvm_detect_profile nvm_check_global_modules nvm_do_install \
nvm_install_dir nvm_node_version nvm_install_node
}
[ "_$NVM_ENV" = "_testing" ] || nvm_do_install
} # this ensures the entire script is downloaded #