[Fix] --save: avoid a conflict with set -e

.github/workflows/latest-npm.yml

@@ -1,81 +0,0 @@
-name: 'Tests: `nvm install-latest-npm`'
-
-on: [pull_request, push]
-
-permissions:
-  contents: read
-
-jobs:
-  matrix:
-    runs-on: ubuntu-latest
-    outputs:
-      latest: ${{ steps.set-matrix.outputs.requireds }}
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            iojs.org:443
-            nodejs.org:443
-            raw.githubusercontent.com:443
-      - uses: ljharb/actions/node/matrix@main
-        id: set-matrix
-        with:
-          versionsAsRoot: true
-          type: majors
-          preset: '>=1'
-
-  nodes:
-    needs: [matrix]
-    permissions:
-      contents: read
-    name: 'nvm install-latest-npm'
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        node-version: ${{ fromJson(needs.matrix.outputs.latest) }}
-        include:
-          - node-version: "9.2"
-          - node-version: "9.1"
-          - node-version: "9.0"
-          - node-version: "6.1"
-          - node-version: "5.9"
-          - node-version: "4.6"
-          - node-version: "4.5"
-          - node-version: "4.4"
-          - node-version: "0.12"
-          - node-version: "0.10"
-
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            raw.githubusercontent.com:443
-            iojs.org:443
-            nodejs.org:443
-            registry.npmjs.org:443
-      - uses: actions/checkout@v4
-      - uses: ljharb/actions/node/install@main
-        name: 'install node'
-        with:
-          node-version: ${{ matrix.node-version }}
-          skip-ls-check: true
-          skip-install: true
-          skip-latest-npm: true
-      - run: npm --version
-      - run: '. ./nvm.sh ; nvm install-latest-npm'
-        name: 'nvm install-latest-npm'
-      - run: npm --version
-
-  node:
-    permissions:
-      contents: none
-    name: 'nvm install-latest-npm'
-    needs: [nodes]
-    runs-on: ubuntu-latest
-    steps:
-      - run: true

.github/workflows/lint.yml

@@ -1,72 +0,0 @@
-name: 'Tests: linting'
-
-on: [pull_request, push]
-
-permissions:
-  contents: read
-
-jobs:
-  eclint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            raw.githubusercontent.com:443
-            nodejs.org:443
-            registry.npmjs.org:443
-      - uses: actions/checkout@v4
-      - uses: ljharb/actions/node/install@main
-        name: 'nvm install ${{ matrix.node-version }} && npm install'
-        with:
-          node-version: 'lts/*'
-      - run: npm run eclint
-
-  dockerfile_lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            ghcr.io:443
-            github.com:443
-            raw.githubusercontent.com:443
-            pkg-containers.githubusercontent.com:443
-            nodejs.org:443
-            registry.npmjs.org:443
-      - uses: actions/checkout@v4
-      - uses: ljharb/actions/node/install@main
-        name: 'nvm install ${{ matrix.node-version }} && npm install'
-        with:
-          node-version: 'lts/*'
-      - run: npm run dockerfile_lint
-
-  doctoc:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            raw.githubusercontent.com:443
-            nodejs.org:443
-            registry.npmjs.org:443
-      - uses: actions/checkout@v4
-      - uses: ljharb/actions/node/install@main
-        name: 'nvm install ${{ matrix.node-version }} && npm install'
-        with:
-          node-version: 'lts/*'
-      - run: npm run doctoc:check
-
-  test_naming:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            raw.githubusercontent.com:443
-      - uses: actions/checkout@v4
-      - name: check tests filenames
-        run: ./rename_test.sh --check

.github/workflows/nvm-install-test.yml

@@ -0,0 +1,98 @@
+name: 'Tests: nvm install with set -e'
+
+on:
+  pull_request:
+  push:
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: 'git ref to use'
+        required: false
+        default: 'HEAD'
+
+jobs:
+  matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - id: matrix
+        run: |
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ] && [ -n "${{ github.event.inputs.ref }}" ]; then
+            echo "matrix=\"[\"${{ github.event.inputs.ref }}\"]\"" >> $GITHUB_OUTPUT
+          else
+            TAGS="$((echo "HEAD" && git tag --sort=-v:refname --merged HEAD --format='%(refname:strip=2) %(creatordate:short)' | grep '^v' | while read tag date; do
+              if [ "$(uname)" == "Darwin" ]; then
+                timestamp=$(date -j -f "%Y-%m-%d" "$date" +%s)
+                threshold=$(date -j -v-4y +%s)
+              else
+                timestamp=$(date -d "$date" +%s)
+                threshold=$(date -d "4 years ago" +%s)
+              fi
+              if [ $timestamp -ge $threshold ]; then echo "$tag"; fi
+            done) | xargs)"
+            echo $TAGS
+            TAGS_JSON=$(printf "%s\n" $TAGS | jq -R . | jq -sc .)
+            echo "matrix=${TAGS_JSON}" >> $GITHUB_OUTPUT
+          fi
+
+  test:
+    needs: [matrix]
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.ref == 'v0.40.0' }} # https://github.com/nvm-sh/nvm/issues/3405
+    strategy:
+      fail-fast: false
+      matrix:
+        ref: ${{ fromJson(needs.matrix.outputs.matrix) }}
+        has-nvmrc:
+           - 'no nvmrc'
+           - 'nvmrc'
+        shell-level:
+           - 1 shlvl
+           - 2 shlvls
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: resolve HEAD to sha
+        run: |
+          if [ '${{ matrix.ref }}' = 'HEAD' ]; then
+            REF="$(git rev-parse HEAD)"
+          else
+            REF="${{ matrix.ref }}"
+          fi
+          echo "resolved ref: ${REF}"
+          echo "ref="$REF"" >> $GITHUB_ENV
+      - run: echo $- # which options are set
+      - run: echo node > .nvmrc
+        if: ${{ matrix.has-nvmrc == 'nvmrc' }}
+      - run:  curl -I --compressed -v https://nodejs.org/dist/
+      - name: 'install nvm'
+        run: |
+          set -e
+          curl -o- "https://raw.githubusercontent.com/nvm-sh/nvm/${ref}/install.sh" | bash
+      - name: nvm install in 1 shell level, ${{ matrix.has-nvmrc }}
+        if: ${{ matrix.shell-level == '1 shlvl' }}
+        run: |
+          set -e && source ~/.nvm/nvm.sh
+          echo nvm.sh sourced
+          nvm --version
+          if [ '${{ matrix.has-nvmrc }}' == 'nvmrc' ]; then
+            nvm install
+          fi
+      - name: nvm install in 2 shell levels, ${{ matrix.has-nvmrc }}
+        if: ${{ matrix.shell-level == '2 shlvls' }}
+        run: |
+          if [ '${{ matrix.has-nvmrc }}' == 'nvmrc' ]; then
+            bash -c "set -e && source ~/.nvm/nvm.sh && echo nvm.sh sourced && nvm --version && nvm install"
+          else
+            bash -c "set -e && source ~/.nvm/nvm.sh && echo nvm.sh sourced && nvm --version"
+          fi
+
+  finisher:
+    runs-on: ubuntu-latest
+    needs: [test]
+    steps:
+      - run: true

.github/workflows/rebase.yml

@@ -1,26 +0,0 @@
-name: Automatic Rebase
-
-on: [pull_request_target]
-
-permissions:
-  contents: read
-
-jobs:
-  _:
-    permissions:
-      contents: write
-    name: "Automatic Rebase"
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Harden Runner
-      uses: step-security/harden-runner@v2
-      with:
-        allowed-endpoints:
-          api.github.com:443
-          github.com:443
-    - uses: actions/checkout@v4
-    - uses: ljharb/rebase@master
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

@@ -1,36 +0,0 @@
-name: 'Tests: release process'
-
-on: [pull_request, push]
-
-permissions:
-  contents: read
-
-jobs:
-  release:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            api.github.com:443
-            objects.githubusercontent.com:443
-            raw.githubusercontent.com:443
-            registry.npmjs.org:443
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "14"
-      - run: npm install
-      - name: Configure git
-        run: |
-          git config user.name github-actions
-          git config user.email github-actions@github.com
-          git fetch --unshallow --tags -f || git fetch --tags -f
-      - name: Attempt `make release` process
-        run: echo proceed | make TAG=99.99.99 release
-        env:
-          GIT_EDITOR: "sed -i '1 s/^/99.99.99 make release test/'"
-      - name: Ensure tag is created
-        run: git tag | grep v99.99.99

.github/workflows/require-allow-edits.yml

@@ -1,24 +0,0 @@
-name: Require “Allow Edits”
-
-on: [pull_request_target]
-
-permissions:
-  contents: read
-
-jobs:
-  _:
-    permissions:
-      pull-requests: read
-    name: "Require “Allow Edits”"
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Harden Runner
-      uses: step-security/harden-runner@v2
-      with:
-        allowed-endpoints:
-          api.github.com:443
-    - uses: ljharb/require-allow-edits@main
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/shellcheck.yml

@@ -1,56 +0,0 @@
-name: 'Tests: shellcheck'
-
-on: [pull_request, push]
-
-permissions:
-  contents: read
-
-jobs:
-  shellcheck_matrix:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        shell:
-          - bash
-          - sh
-          - dash
-          - ksh
-        file:
-          - nvm.sh
-        include:
-          - shell: bash
-            file: install.sh # only supported on bash
-          - shell: bash
-            file: bash_completion # only needed in bash/zsh
-          - shell: bash
-            file: nvm-exec # only runs in bash
-
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            ghcr.io:443
-            github.com:443
-            pkg-containers.githubusercontent.com:443
-            formulae.brew.sh:443
-      - uses: actions/checkout@v4
-      - name: Set up Homebrew
-        uses: Homebrew/actions/setup-homebrew@master
-      - name: Install latest shellcheck
-        run: brew install shellcheck
-        env:
-          HOMEBREW_NO_ANALYTICS: 1
-      - run: which shellcheck
-      - run: shellcheck --version
-      - name: Run shellcheck on ${{ matrix.file }}
-        run: shellcheck -s ${{ matrix.shell }} ${{ matrix.file }}
-
-  shellcheck:
-      permissions:
-        contents: none
-      needs: [shellcheck_matrix]
-      runs-on: ubuntu-latest
-      steps:
-        - run: true

.github/workflows/tests.yml

@@ -1,61 +0,0 @@
-name: urchin tests
-
-on: [push]
-
-permissions:
-  contents: read
-
-jobs:
-  tests:
-    permissions:
-      contents: write
-
-    name: "tests"
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        shell: 'script -q -e -c "${{ matrix.shell }} {0}"'
-
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - shell: bash
-            suite: install_script
-      #   shell:
-      #     - bash
-      #   suite:
-      #     - install_script
-
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@v2
-        with:
-          allowed-endpoints:
-            github.com:443
-            registry.npmjs.org:443
-            raw.githubusercontent.com:443
-            nodejs.org:443
-            iojs.org:443
-      - uses: actions/checkout@v4
-      - run: sudo ${{ matrix.shell }} --version 2> /dev/null || dpkg -s ${{ matrix.shell }} 2> /dev/null || which ${{ matrix.shell }}
-      - run: curl --version
-      - run: wget --version
-      - uses: ljharb/actions/node/run@main
-        name: 'npm install && version checks'
-        with:
-          node-version: 'lts/*'
-          skip-ls-check: true
-          shell-command: echo installed
-      - run: npm ls urchin
-      - run: env
-      - run: make TERM=xterm-256color TEST_SUITE="${{ matrix.suite }}" SHELL="${{ matrix.shell }}" URCHIN="$(npx which urchin)" test-${{ matrix.shell }}
-
-  nvm:
-    permissions:
-      contents: none
-    name: 'all test suites, all shells'
-    needs: [tests]
-    runs-on: ubuntu-latest
-    steps:
-      - run: true

.github/workflows/toc.yml

@@ -1,40 +0,0 @@
-name: update readme TOC
-
-on: [push]
-
-permissions:
-  contents: read
-
-jobs:
-  _:
-    permissions:
-      contents: write
-    name: "update readme TOC"
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Harden Runner
-      uses: step-security/harden-runner@v2
-      with:
-        allowed-endpoints:
-          github.com:443
-          registry.npmjs.org:443
-    - uses: actions/checkout@v4
-      with:
-        # https://github.com/actions/checkout/issues/217#issue-599945005
-        # pulls all commits (needed for lerna / semantic release to correctly version)
-        fetch-depth: "0"
-
-    # pulls all tags (needed for lerna / semantic release to correctly version)
-    - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-    - uses: actions/setup-node@v4
-      with:
-        node-version: '16'
-    - run: npm install
-    - run: npm run doctoc
-    - name: commit changes
-      uses: ljharb/actions-js-build/commit@v3+amendpush
-      with:
-        amend: true
-        force: true

.github/workflows/windows-npm.yml

@@ -1,193 +0,0 @@
-name: 'Tests on Windows: `nvm install`'
-
-on: [pull_request, push]
-
-permissions:
-  contents: read
-
-env:
-  NVM_INSTALL_GITHUB_REPO: ${{ github.repository }}
-  NVM_INSTALL_VERSION: ${{ github.sha }}
-
-jobs:
-  msys_fail_install:
-    # Default installation does not work due to npm_config_prefix set to C:\npm\prefix
-    permissions:
-      contents: none
-    name: 'MSYS fail prefix nvm install'
-    runs-on: windows-latest
-    steps:
-      - name: Retrieve nvm
-        shell: bash
-        run: |
-          curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
-          . "$HOME/.nvm/nvm.sh"
-          ! nvm install --lts
-
-  msys_matrix:
-    permissions:
-      contents: none
-    name: 'MSYS nvm install'
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        npm-node-version:
-          - '--lts'
-          - '--default 12'
-          - '--no-progress 10'
-    steps:
-      - name: Retrieve nvm
-        shell: bash
-        run: |
-          unset npm_config_prefix
-          if [ "${{ matrix.npm-node-version }}" = "--lts" ]; then
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
-          else
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
-          fi
-          . "$HOME/.nvm/nvm.sh"
-          nvm install ${{ matrix.npm-node-version }}
-
-  cygwin_matrix:
-    continue-on-error: true
-    permissions:
-      contents: none
-    name: 'Cygwin nvm install'
-    runs-on: windows-latest
-    steps:
-      - name: Install Cygwin
-        shell: bash
-        run: |
-          export SITE='https://mirror.clarkson.edu/cygwin/' # see https://archlinux.org/mirrors/clarkson.edu/1603/ for uptime status
-          export SITE='https://mirrors.kernel.org/sourceware/cygwin/'
-          export LOCALDIR="$(pwd)"
-          export ROOTDIR="$USERPROFILE\\cygwin"
-          export PACKAGES='bash,git,curl'
-
-          curl -fsSLo setup-x86_64.exe 'https://cygwin.com/setup-x86_64.exe'
-          ./setup-x86_64.exe --disable-buggy-antivirus -q -s "$SITE" -l "$LOCALDIR" -R "$ROOTDIR" -P "$PACKAGES"
-
-          cat >~/setup.sh <<EOM
-            unset npm_config_prefix
-            export NVM_INSTALL_GITHUB_REPO="$NVM_INSTALL_GITHUB_REPO"
-            export NVM_INSTALL_VERSION="$NVM_INSTALL_VERSION"
-
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
-            . "$HOME/.nvm/nvm.sh"
-            nvm install --lts
-
-            nvm deactivate
-            rm -rf "$HOME/.nvm/nvm.sh"
-
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD=script bash
-            . "$HOME/.nvm/nvm.sh"
-            nvm install 9
-          EOM
-      - name: Retrieve nvm
-        shell: cmd
-        run: |
-          cd %USERPROFILE%\cygwin\bin
-          bash.exe "%USERPROFILE%\setup.sh"
-
-  wsl_matrix:
-    continue-on-error: true
-    name: 'WSL nvm install'
-    defaults:
-      run:
-          shell: wsl-bash {0}
-    runs-on: windows-latest
-    env:
-      WSLENV: NVM_INSTALL_GITHUB_REPO:NVM_INSTALL_VERSION:/p
-    strategy:
-      fail-fast: false
-      matrix:
-        wsl-distrib:
-          - Debian
-        # - Alpine # fails
-          - Ubuntu-20.04
-          - Ubuntu-18.04
-        npm-node-version:
-          - '--lts'
-          - '21'
-          - '18'
-          - '16'
-          - '14'
-          - '12'
-          - '10'
-        exclude:
-          - wsl-distrib: Ubuntu-18.04
-            npm-node-version: '--lts'
-          - wsl-distrib: Ubuntu-18.04
-            npm-node-version: '21'
-          - wsl-distrib: Ubuntu-18.04
-            npm-node-version: '18'
-        method:
-          - ''
-          - 'script'
-    steps:
-      - uses: Vampire/setup-wsl@v3
-        with:
-          distribution: ${{ matrix.wsl-distrib }}
-          additional-packages: bash git curl ca-certificates wget
-      - name: Retrieve nvm on WSL
-        run: |
-          if [ -z "${{ matrix.method }}" ]; then
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
-          else
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD="${{matrix.method}}" bash
-          fi
-          . "$HOME/.nvm/nvm.sh"
-          nvm install ${{ matrix.npm-node-version }}
-          node -v
-
-  wsl_matrix_unofficial:
-    continue-on-error: true
-    name: 'WSL nvm install'
-    defaults:
-      run:
-          shell: wsl-bash {0}
-    runs-on: windows-latest
-    env:
-      WSLENV: NVM_INSTALL_GITHUB_REPO:NVM_INSTALL_VERSION:/p
-      NVM_NODEJS_ORG_MIRROR: https://unofficial-builds.nodejs.org/download/release
-    strategy:
-      fail-fast: false
-      matrix:
-        wsl-distrib:
-          - Alpine
-        npm-node-version:
-          - '--lts'
-          - '21'
-          - '18'
-          - '16'
-          - '14'
-          - '12'
-          - '11'
-          - '10'
-        method:
-          - ''
-          - 'script'
-    steps:
-      - uses: Vampire/setup-wsl@v3
-        with:
-          distribution: ${{ matrix.wsl-distrib }}
-          additional-packages: bash git curl ca-certificates wget
-      - name: Retrieve nvm on WSL
-        run: |
-          if [ -z "${{ matrix.method }}" ]; then
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | bash
-          else
-            curl -fsSLo- "https://raw.githubusercontent.com/${NVM_INSTALL_GITHUB_REPO}/${NVM_INSTALL_VERSION}/install.sh" | METHOD="${{matrix.method}}" bash
-          fi
-          . "$HOME/.nvm/nvm.sh"
-          NVM_NODEJS_ORG_MIRROR=${{ env.NVM_NODEJS_ORG_MIRROR }} nvm install ${{ matrix.npm-node-version }}
-
-  nvm_windows:
-    name: 'tests, on windows'
-    permissions:
-      contents: none
-    needs: [wsl_matrix, wsl_matrix_unofficial, cygwin_matrix, msys_matrix, msys_fail_install]
-    runs-on: ubuntu-latest
-    steps:
-      - run: true

nvm.sh

@@ -3360,6 +3360,10 @@ nvm() {
             shift
           ;;
           --save | -w)
+            if [ $NVM_WRITE_TO_NVMRC -eq 1 ]; then
+              nvm_err '--save and -w may only be provided once'
+              return 6
+            fi
             NVM_WRITE_TO_NVMRC=1
             shift
           ;;
@@ -3511,6 +3515,11 @@ nvm() {
           nvm_ensure_default_set "${provided_version}"
         fi
 
+        if [ $NVM_WRITE_TO_NVMRC -eq 1 ]; then
+          nvm_write_nvmrc "${VERSION}"
+          EXIT_CODE=$?
+        fi
+
         if [ $EXIT_CODE -ne 0 ] && [ -n "${ALIAS-}" ]; then
           nvm alias "${ALIAS}" "${provided_version}"
           EXIT_CODE=$?
@@ -3746,6 +3755,8 @@ nvm() {
       local NVM_LTS
       local IS_VERSION_FROM_NVMRC
       IS_VERSION_FROM_NVMRC=0
+      local NVM_WRITE_TO_NVMRC
+      NVM_WRITE_TO_NVMRC=0
 
       while [ $# -ne 0 ]; do
         case "$1" in
@@ -3757,7 +3768,13 @@ nvm() {
           --) ;;
           --lts) NVM_LTS='*' ;;
           --lts=*) NVM_LTS="${1##--lts=}" ;;
-          --save | -w) NVM_WRITE_TO_NVMRC=1 ;;
+          --save | -w)
+            if [ $NVM_WRITE_TO_NVMRC -eq 1 ]; then
+              nvm_err '--save and -w may only be provided once'
+              return 6
+            fi
+            NVM_WRITE_TO_NVMRC=1
+          ;;
           --*) ;;
           *)
             if [ -n "${1-}" ]; then
@@ -3791,8 +3808,8 @@ nvm() {
         return 127
       fi
 
-      if [ "${NVM_WRITE_TO_NVMRC:-0}" -eq 1 ]; then
-        nvm_write_nvmrc "$VERSION"
+      if [ $NVM_WRITE_TO_NVMRC -eq 1 ]; then
+        nvm_write_nvmrc "${VERSION}"
       fi
 
       if [ "_${VERSION}" = '_system' ]; then
@@ -4539,31 +4556,41 @@ nvm_supports_xz() {
 nvm_auto() {
   local NVM_MODE
   NVM_MODE="${1-}"
-  local VERSION
-  local NVM_CURRENT
-  if [ "_${NVM_MODE}" = '_install' ]; then
-    VERSION="$(nvm_alias default 2>/dev/null || nvm_echo)"
-    if [ -n "${VERSION}" ] && ! [ "_${VERSION}" = '_N/A' ] && nvm_is_valid_version "${VERSION}"; then
-      nvm install "${VERSION}" >/dev/null
-    elif nvm_rc_version >/dev/null 2>&1; then
-      nvm install >/dev/null
-    fi
-  elif [ "_$NVM_MODE" = '_use' ]; then
-    NVM_CURRENT="$(nvm_ls_current)"
-    if [ "_${NVM_CURRENT}" = '_none' ] || [ "_${NVM_CURRENT}" = '_system' ]; then
-      VERSION="$(nvm_resolve_local_alias default 2>/dev/null || nvm_echo)"
-      if [ -n "${VERSION}" ] && ! [ "_${VERSION}" = '_N/A' ] && nvm_is_valid_version "${VERSION}"; then
-        nvm use --silent "${VERSION}" >/dev/null
-      elif nvm_rc_version >/dev/null 2>&1; then
-        nvm use --silent >/dev/null
+
+  case "${NVM_MODE}" in
+    none) return 0 ;;
+    use | install)
+      local VERSION
+      local NVM_CURRENT
+      NVM_CURRENT="$(nvm_ls_current)"
+      if [ "_${NVM_CURRENT}" = '_none' ] || [ "_${NVM_CURRENT}" = '_system' ]; then
+        VERSION="$(nvm_resolve_local_alias default 2>/dev/null || nvm_echo)"
+        if [ -n "${VERSION}" ]; then
+          if [ "_${VERSION}" != '_N/A' ] && nvm_is_valid_version "${VERSION}"; then
+            if [ "_${NVM_MODE}" = '_install' ]; then
+              nvm install "${VERSION}" >/dev/null
+            else
+              nvm use --silent "${VERSION}" >/dev/null
+            fi
+          else
+            return 0
+          fi
+        elif nvm_rc_version >/dev/null 2>&1; then
+          if [ "_${NVM_MODE}" = '_install' ]; then
+            nvm install >/dev/null
+          else
+            nvm use --silent >/dev/null
+          fi
+        fi
+      else
+        nvm use --silent "${NVM_CURRENT}" >/dev/null
       fi
-    else
-      nvm use --silent "${NVM_CURRENT}" >/dev/null
-    fi
-  elif [ "_${NVM_MODE}" != '_none' ]; then
-    nvm_err 'Invalid auto mode supplied.'
-    return 1
-  fi
+    ;;
+    *)
+      nvm_err 'Invalid auto mode supplied.'
+      return 1
+    ;;
+  esac
 }
 
 nvm_process_parameters() {