mirror of
https://github.com/tj/n.git
synced 2024-11-22 11:37:26 +01:00
98 lines
2.4 KiB
Bash
98 lines
2.4 KiB
Bash
#!/usr/bin/env bash
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# unset the n environment variables so tests running from known state.
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# Globals:
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# lots
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function unset_n_env(){
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unset N_PREFIX
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unset NODE_MIRROR
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unset N_NODE_MIRROR
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unset N_NODE_DOWNLOAD_MIRROR
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unset N_MAX_REMOTE_MATCHES
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unset N_PRESERVE_NPM
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unset HTTP_USER
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unset HTTP_PASSWORD
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}
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# Create temporary dir and configure n to use it.
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# Globals:
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# TMP_PREFIX_DIR
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# N_PREFIX
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# PATH
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function setup_tmp_prefix() {
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TMP_PREFIX_DIR="$(mktemp -d)"
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[ -d "${TMP_PREFIX_DIR}" ] || exit 2
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# return a safer variable to `rm -rf` later than N_PREFIX
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export TMP_PREFIX_DIR
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export N_PREFIX="${TMP_PREFIX_DIR}"
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export PATH="${N_PREFIX}/bin:${PATH}"
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}
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# Display relevant file name (third field of index.tab) for current platform.
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# Based on code from nvm rather than n for independent approach. Simplified for just common platforms initially.
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# See list on https://github.com/nodejs/nodejs-dist-indexer
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function display_compatible_file_field() {
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local os="unexpected"
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case "$(uname -a)" in
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Linux\ *) os="linux" ;;
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Darwin\ *) os="osx" ;;
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esac
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local arch="unexpected"
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local uname_m
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uname_m="$(uname -m)"
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case "${uname_m}" in
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x86_64 | amd64) arch="x64" ;;
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i*86) arch="x86" ;;
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aarch64) arch="arm64" ;;
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*) arch="${uname_m}" ;;
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esac
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echo "${os}-${arch}"
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}
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# display_remote_version <version>
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# Limited support for using index.tab to resolve version into a number.
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# Return version number, without leading v.
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function display_remote_version() {
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# ToDo: support NODE_MIRROR
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local fetch
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if command -v curl &> /dev/null; then
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fetch="curl --silent --location --fail --compressed"
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else
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# insecure to match current n implementation
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fetch="wget -q -O- --no-check-certificate"
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fi
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local TAB_CHAR=$'\t'
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local match='xxx'
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local mirror="${N_NODE_MIRROR:-https://nodejs.org/dist}"
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if [[ "$1" = "lts" || "$1" = "stable" ]]; then
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match="^([^${TAB_CHAR}]+${TAB_CHAR}){9}[^-]"
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elif [[ "$1" = "latest" ]]; then
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match='.'
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elif [[ "$1" = "nightly" ]]; then
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match='.'
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mirror="${N_NODE_DOWNLOAD_MIRROR:-https://nodejs.org/download}/nightly"
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fi
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# Using awk rather than head so do not close pipe early on curl
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${fetch} "${mirror}/index.tab" \
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| tail -n +2 \
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| grep "$(display_compatible_file_field)" \
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| grep -E "${match}" \
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| cut -f -1 \
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| awk "NR==1" \
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| grep -E -o '[^v].*'
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}
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