[Fix] nvm_get_arch: proper value for alpine linux

test/fast/Unit tests/nvm_get_arch_unofficial

@@ -0,0 +1,94 @@
+#!/bin/sh
+
+# Save the PATH as it was when the test started to restore it when it finishes
+ORIG_PATH="${PATH}"
+
+cleanup() {
+  # Restore the PATH as it was when the test started
+  export PATH="${ORIG_PATH}"
+  rm -rf "${TMP_DIR}"
+}
+
+die() {
+  cleanup
+  echo "$@"
+  exit 1
+}
+
+. ../../../nvm.sh
+
+# Sets the PATH for these tests to include the symlinks to the mocked binaries
+export PATH=".:${PATH}"
+
+TMP_DIR=$(mktemp -d)
+CHROOT_WITH_ALPINE="$TMP_DIR/with_alpine"
+CHROOT_WITHOUT_ALPINE="$TMP_DIR/without_alpine"
+
+setup_chroot() {
+  chroot_dir=$1
+
+  # Directories
+  mkdir -p "${chroot_dir}/etc"
+  mkdir -p "${chroot_dir}/bin"
+  mkdir -p "${chroot_dir}/usr/bin"
+  mkdir -p "${chroot_dir}/lib64"
+  mkdir -p "${chroot_dir}/dev"
+
+  # Files and binaries
+  cp ../../../nvm.sh "${chroot_dir}/"
+  cp /bin/sh /usr/bin/dirname "${chroot_dir}/bin/"
+  [ "${chroot_dir}" = "${CHROOT_WITH_ALPINE}" ] && touch "${chroot_dir}/etc/alpine-release"
+
+  # Libraries
+  for binary in /bin/sh /usr/bin/dirname; do
+    for lib in $(ldd $binary | awk '{print $3}' | grep "^/"); do
+      dir=$(dirname "${lib}")
+      mkdir -p "${chroot_dir}${dir}"
+      cp "${lib}" "${chroot_dir}${dir}/"
+    done
+  done
+
+  # Dynamic linker
+  cp /lib64/ld-linux-x86-64.so.2 "${chroot_dir}/lib64/"
+
+  # /dev/null
+  sudo mknod "${chroot_dir}/dev/null" c 1 3
+}
+
+setup_chroot "${CHROOT_WITH_ALPINE}"
+setup_chroot "${CHROOT_WITHOUT_ALPINE}"
+
+# Run tests in chroot environments
+ARCH_WITH_ALPINE=$(sudo chroot "${CHROOT_WITH_ALPINE}" /bin/sh -c ". ./nvm.sh && nvm_get_arch")
+[ "${ARCH_WITH_ALPINE}" = "x64-musl" ] || die "Expected x64-musl for alpine environment but got ${ARCH_WITH_ALPINE}"
+
+ARCH_WITHOUT_ALPINE=$(sudo chroot "${CHROOT_WITHOUT_ALPINE}" /bin/sh -c ". ./nvm.sh && nvm_get_arch")
+[ "${ARCH_WITHOUT_ALPINE}" != "x64-musl" ] || die "Did not expect x64-musl for non-alpine environment"
+
+# Run tests for nvm ls-remote
+test_default_ls_remote() {
+  mock_response='N/A'
+  result=$(NVM_NODEJS_ORG_MIRROR='http://nonexistent-url' nvm ls-remote 18)
+  if [ "${result}" = "${mock_response}" ]; then
+    die "Test failed: Expected '${mock_response}' for but got '${result}'"
+  else
+    echo "Test passed"
+  fi
+}
+
+test_unofficial_mirror_ls_remote() {
+  mock_response='v18.18.0   (LTS: Hydrogen)'
+  result=$(NVM_NODEJS_ORG_MIRROR='https://unofficial-builds.nodejs.org/download/release' nvm ls-remote 18.18.0 | sed -e 's/^[[:space:]]*//')
+  result=$(echo "${result}" | sed 's/\x1b\[[0-9;]*m//g')
+
+  if [ "${result}" = "${mock_response}" ]; then
+    echo "Test passed"
+  else
+    die "Test failed: Expected '${mock_response}' but got '${result}'"
+  fi
+}
+
+test_default_ls_remote
+test_unofficial_mirror_ls_remote
+
+cleanup