[mod] Tools to install and maintain NVM versions manager for Node.js

[1] https://github.com/nvm-sh/nvm

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 171 insertions, 0 deletions

diff --git a/utils/lib_nvm.sh b/utils/lib_nvm.sh
new file mode 100755
index 000000000..c12be05cf
--- /dev/null
+++ b/utils/lib_nvm.sh
@@ -0,0 +1,171 @@
+#!/usr/bin/env bash
+# -*- coding: utf-8; mode: sh indent-tabs-mode: nil -*-
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+# Tools to install and maintain NVM versions manager for Node.js
+#
+# [1] https://github.com/nvm-sh/nvm
+
+# https://github.com/koalaman/shellcheck/issues/356#issuecomment-853515285
+# shellcheck source=utils/lib.sh
+. /dev/null
+
+declare main_cmd
+
+# configure nvm environment
+# -------------------------
+
+NVM_LOCAL_FOLDER=.nvm
+
+[[ -z "${NVM_GIT_URL}" ]] &&  NVM_GIT_URL="https://github.com/nvm-sh/nvm.git"
+[[ -z "${NVM_MIN_NODE_VER}" ]] && NVM_MIN_NODE_VER="16.13.0"
+
+# initalize nvm environment
+# -------------------------
+
+nvm.env() {
+    source "${NVM_DIR}/nvm.sh"
+    source "${NVM_DIR}/bash_completion"
+}
+
+nvm.is_installed() {
+    # is true if NVM is installed / in $HOME or even in <repo-root>/.nvm
+    [[ -d "${NVM_DIR}" ]]
+}
+
+if [[ -z "${NVM_DIR}" ]]; then
+    # nvm is not pre-intalled in $HOME.  Prepare for using nvm from <repo-root>
+    NVM_DIR="$(git rev-parse --show-toplevel)/${NVM_LOCAL_FOLDER}"
+fi
+export NVM_DIR
+
+if nvm.is_installed; then
+    [ "$VERBOSE" = "1" ] && info_msg "source NVM environment from ${NVM_DIR}"
+    nvm.env
+else
+    # if nvm is not installed, use this function as a wrapper
+    nvm() {
+        nvm.ensure
+        nvm "$@"
+    }
+fi
+
+# implement nvm functions
+# -----------------------
+
+nvm.is_local() {
+    # is true if NVM is installed in <repo-root>/.nvm
+    [ "${NVM_DIR}" = "$(git rev-parse --show-toplevel)/${NVM_LOCAL_FOLDER}" ]
+}
+
+nvm.min_node(){
+
+    # usage:  nvm.min_node 16.3.0
+    #
+    # Is true if minimal Node.js version is installed.
+
+    local min_v
+    local node_v
+    local higher_v
+
+    if ! command -v node >/dev/null; then
+        wanr_msg "Node.js is not yet installed"
+        return 42
+    fi
+
+    min_v="${1}"
+    node_v="$(node --version)"
+    node_v="${node_v:1}" # remove 'v' from 'v16.3.0'
+    if ! [ "${min_v}" = "${node_v}" ]; then
+        higher_v="$(echo -e "$min_v\n${node_v}" | sort -Vr | head -1)"
+        if [ "${min_v}" = "${higher_v}" ]; then
+            return 42
+        fi
+    fi
+}
+
+# implement nvm command line
+# --------------------------
+
+nvm.help(){
+    cat <<EOF
+nvm.: use nvm (without dot) to execute nvm commands directly
+  install   : install NVM locally at $(git rev-parse --show-toplevel)/${NVM_LOCAL_FOLDER}
+  clean     : remove NVM installation
+  status    : prompt some status informations about nvm & node
+  nodejs    : install Node.js latest LTS
+  bash      : start bash interpreter with NVM environment sourced
+EOF
+}
+
+nvm.install() {
+    local NVM_VERSION_TAG
+    info_msg "install (update) NVM at ${NVM_DIR}"
+    if [[ -d "${NVM_DIR}" ]] ; then
+        info_msg "already cloned at: ${NVM_DIR}"
+        pushd "${NVM_DIR}" &> /dev/null
+        git fetch --all | prefix_stdout "  ${_Yellow}||${_creset} "
+    else
+        info_msg "clone: ${NVM_GIT_URL}"
+        git clone "${NVM_GIT_URL}" "${NVM_DIR}" 2>&1 | prefix_stdout "  ${_Yellow}||${_creset} "
+        pushd "${NVM_DIR}" &> /dev/null
+        git config --local advice.detachedHead false
+    fi
+    NVM_VERSION_TAG="$(git rev-list --tags --max-count=1)"
+    NVM_VERSION_TAG="$(git describe --abbrev=0 --tags --match "v[0-9]*" "${NVM_VERSION_TAG}")"
+    info_msg "checkout ${NVM_VERSION_TAG}"
+    git checkout "${NVM_VERSION_TAG}" 2>&1 | prefix_stdout "  ${_Yellow}||${_creset} "
+    nvm.env
+}
+
+nvm.clean() {
+    if ! nvm.is_installed; then
+        info_msg "NVM is not installed"
+        return 42
+    fi
+    if ! nvm.is_local; then
+        info_msg "can't remove NVM from ${NVM_DIR}"
+        return 42
+    fi
+    rm -rf "${NVM_DIR}"
+}
+
+nvm.status(){
+    if command -v node >/dev/null; then
+        info_msg "Node.js is installed at $(command -v node)"
+        info_msg "Node.js is version $(node --version)"
+        if ! nvm.min_node "${NVM_MIN_NODE_VER}"; then
+            warn_msg "minimal Node.js version is ${NVM_MIN_NODE_VER}"
+        fi
+    else
+        warn_msg "Node.js is mot installed"
+    fi
+    if command -v npm >/dev/null; then
+        info_msg "npm is installed at $(command -v npm)"
+        info_msg "npm is version $(npm --version)"
+    else
+        warn_msg "npm is not installed"
+    fi
+    if nvm.is_installed; then
+        info_msg "NVM is installed at ${NVM_DIR}"
+    else
+        warn_msg "NVM is not installed"
+        info_msg "to install NVM and Node.js (LTS) use: ${main_cmd} nvm install --lts"
+    fi
+}
+
+nvm.nodejs(){
+    nvm install --lts
+    nvm.status
+}
+
+nvm.bash() {
+    nvm.ensure
+    bash --init-file <(cat "${NVM_DIR}/nvm.sh" "${NVM_DIR}/bash_completion")
+}
+
+nvm.ensure() {
+    if ! nvm.is_installed; then
+        nvm.install
+    fi
+}