134 lines
4.0 KiB
Bash
Executable File
134 lines
4.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Check if we need to copy node_modules.
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# (e.g. in case it has been modified after last copy)
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#
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# The reasoning for a (mostly) read-only node_modules folder:
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# ideally we’d symlink the folder directly to the Nix store
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# so that we’re guaranteed to have a reproducible source.
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# Unfortunately react-native wants to build some stuff after the fact
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# and this is incompatible with the concept of a pure Nix package.
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# Therefore we copy the whole source to the repo directory,
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# allow writing only on the folders where it is absolutely required,
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# and therefore we still keep some peace of mind that the rest
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# of node_modules is unchanged the rest of the time.
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#
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set -Eeuo pipefail
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GIT_ROOT=$(cd "${BASH_SOURCE%/*}" && git rev-parse --show-toplevel)
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source "${GIT_ROOT}/scripts/colors.sh"
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# More concise output from 'time'
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export TIMEFORMAT="Done in: %Es"
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function removeDir() {
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[[ ! -d "${tmp}" ]] && return
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chmod -R u+w "${tmp}"
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rm -rf "${tmp}"
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}
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function copyNodeModules() {
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local src="${1}"
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local dst="${2}"
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# WARNING: The ../ is there to avoid a Nix builtins.path bug:
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# https://github.com/NixOS/nix/issues/3593
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local tmp=$(mktemp -d -p "$(dirname ${dst})/../")
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# We use a temporary directory to use mv as "atomic" change
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trap "removeDir ${tmp}" ERR INT HUP
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# WARNING: The -L here is crucial to let Metro find modules.
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cp -LRf ${src}/node_modules/. "${tmp}"
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chmod -R +w "${tmp}"
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# WARNING: We can't de-reference .bin symlinks
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cp -Rf ${src}/node_modules/.bin/. "${tmp}/.bin/"
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rm -r "${dst}"
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mv -f "${tmp}" "${dst}"
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}
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# Find files that were modified and should cause a re-copying of node modules.
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# Some files are generated/modified by build processes and should be ignored.
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function findFilesNewerThan() {
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local sentinel="${1}"
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local dir="${2}"
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find ${dir} -type f -writable \
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-newer ${sentinel} \
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-not -ipath "*/*android/build/*" -prune \
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-not -ipath "*/xcuserdata/*" -prune \
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-not -ipath "*/unpacked_bin/clj-kondo" \
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-not -ipath "*/scripts/.packager.env" \
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-print
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}
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function nodeModulesUnchanged() {
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local src="$1"
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local dst="$2"
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local sentinelFile="${dst}/.copied~"
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# Check if node_modules exists and is valid
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if [[ ! -f "${sentinelFile}" ]]; then
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# node_modules have not been created by this script
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echo -e "${YLW}Node modules not created by Nix${RST}" >&2
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return 1
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fi
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# Sentinel file holds location of the node_modules source in Nix store
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currentNixSrc="$(cat ${sentinelFile})"
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if [ "${currentNixSrc}" != "${src}" ]; then
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echo -e "${YLW}Yarn modules changed, copying new version over${RST}" >&2
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return 1
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fi
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# Some build processes modify files in node_modules
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modifiedFiles=($(findFilesNewerThan "${sentinelFile}" "${dst}"))
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if [ ${#modifiedFiles[@]} -ne 0 ]; then
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echo -e "${YLW}Changes detected in node_modules:${RST} ${#modifiedFiles[@]}" >&2
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# Print files that have changes
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for file in ${modifiedFiles[@]}; do
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echo "- $(realpath --relative-to=${dst} ${file})" >&2
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done
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return 1
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fi
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echo -e "${GRN}No changes detected.${RST}" >&2
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return 0
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}
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function replaceNodeModules() {
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local src="$1"
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local dst="$2"
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local sentinelFile="${dst}/.copied~"
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if nodeModulesUnchanged ${src} ${dst}; then
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return
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fi
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# Replace node_modules if necessary
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echo "Copying node_modules from Nix store:" >&2
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echo " - ${src}" >&2
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copyNodeModules ${src} ${dst}
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echo -n "${src}" > "${sentinelFile}"
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}
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# Destination folder, Nix sets STATUS_REACT_HOME
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dst="$STATUS_REACT_HOME/node_modules"
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# Source of Node modules from /nix/store
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src="$1"
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if [[ ! -d ${src} ]]; then
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echo -e "${RED}No such folder:${RST} ${src}" >&2
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exit 1
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fi
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# Make those available in shell spawned by flock
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export -f replaceNodeModules nodeModulesUnchanged copyNodeModules findFilesNewerThan removeDir
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mkdir -p "${dst}"
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# Leverage file lock to create an exclusive lock.
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# Otherwise multiple calls to this script would clash.
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flock "${dst}/" sh -c "time replaceNodeModules ${src} ${dst}"
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