install.sh - third_party/nvm - Git at Google

 #!/usr/bin/env bash

 { # this ensures the entire script is downloaded #

 nvm_has() {
   type "$1" > /dev/null 2>&1
 }

 nvm_install_dir() {
   echo "${NVM_DIR:-"$HOME/.nvm"}"
 }

 nvm_latest_version() {
   echo "v0.31.6"
 }

 #
 # 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 [ -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 -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/-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 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 "$INSTALL_DIR"
     command git clone "$(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
     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() {
   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)

   # 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
   }
   chmod a+x "$INSTALL_DIR/nvm-exec" || {
     echo >&2 "Failed to mark '$INSTALL_DIR/nvm-exec' as executable"
     return 3
   }
 }

 #
 # 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 "$DETECTED_PROFILE" ]; then
     if [ -f "$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

   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="$(
     npm list -g --depth=0 |
     command sed '/ npm@/d' |
     command sed '/ (empty)$/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 [ "${MODULE_COUNT}" != '0' ]; then
     cat <<-'END_MESSAGE'
 	=> You currently have modules installed globally with `npm`. These will no
 	=> longer be linked to the active version of Node when you install a new node
 	=> with `nvm`; and they may (depending on how you construct your `$PATH`)
 	=> override the binaries of modules installed with `nvm`:

 	END_MESSAGE
     command 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

   echo

   local NVM_PROFILE
   NVM_PROFILE="$(nvm_detect_profile)"
   local INSTALL_DIR
   INSTALL_DIR="$(nvm_install_dir)"

   SOURCE_STR="\nexport NVM_DIR=\"$INSTALL_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\"  # This loads nvm\n"

   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 ${NVM_PROFILE}) and run this script again"
     echo "   OR"
     echo "=> Append the following lines to the correct file yourself:"
     command printf "${SOURCE_STR}"
   else
     if ! command grep -qc '/nvm.sh' "$NVM_PROFILE"; then
       echo "=> Appending source string to $NVM_PROFILE"
       command printf "$SOURCE_STR" >> "$NVM_PROFILE"
     else
       echo "=> Source string already in ${NVM_PROFILE}"
     fi
   fi

   # Source nvm
   # shellcheck source=/dev/null
   . "${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"
 }

 #
 # 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 \
     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 #
	#!/usr/bin/env bash

	{ # this ensures the entire script is downloaded #

	nvm_has() {
	type "$1" > /dev/null 2>&1
	}

	nvm_install_dir() {
	echo "${NVM_DIR:-"$HOME/.nvm"}"
	}

	nvm_latest_version() {
	echo "v0.31.6"
	}

	#
	# 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 [ -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 -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/-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 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 "$INSTALL_DIR"
	command git clone "$(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
	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() {
	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)

	# 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
	}
	chmod a+x "$INSTALL_DIR/nvm-exec" \|\| {
	echo >&2 "Failed to mark '$INSTALL_DIR/nvm-exec' as executable"
	return 3
	}
	}

	#
	# 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 "$DETECTED_PROFILE" ]; then
	if [ -f "$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

	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="$(
	npm list -g --depth=0 \|
	command sed '/ npm@/d' \|
	command sed '/ (empty)$/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 [ "${MODULE_COUNT}" != '0' ]; then
	cat <<-'END_MESSAGE'
	=> You currently have modules installed globally with `npm`. These will no
	=> longer be linked to the active version of Node when you install a new node
	=> with `nvm`; and they may (depending on how you construct your `$PATH`)
	=> override the binaries of modules installed with `nvm`:

	END_MESSAGE
	command 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

	echo

	local NVM_PROFILE
	NVM_PROFILE="$(nvm_detect_profile)"
	local INSTALL_DIR
	INSTALL_DIR="$(nvm_install_dir)"

	SOURCE_STR="\nexport NVM_DIR=\"$INSTALL_DIR\"\n[ -s \"\$NVM_DIR/nvm.sh\" ] && . \"\$NVM_DIR/nvm.sh\" # This loads nvm\n"

	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 ${NVM_PROFILE}) and run this script again"
	echo " OR"
	echo "=> Append the following lines to the correct file yourself:"
	command printf "${SOURCE_STR}"
	else
	if ! command grep -qc '/nvm.sh' "$NVM_PROFILE"; then
	echo "=> Appending source string to $NVM_PROFILE"
	command printf "$SOURCE_STR" >> "$NVM_PROFILE"
	else
	echo "=> Source string already in ${NVM_PROFILE}"
	fi
	fi

	# Source nvm
	# shellcheck source=/dev/null
	. "${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"
	}

	#
	# 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 \
	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 #