mirror of
https://github.com/tailscale/tailscale.git
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75 lines
2.0 KiB
Plaintext
75 lines
2.0 KiB
Plaintext
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#!/bin/sh
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#
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# This script acts like the "wasm-opt" command from the Binaryen toolchain, but
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# uses Tailscale's currently-desired version, downloading it first if necessary.
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set -eu
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BINARYEN_DIR="$HOME/.cache/tailscale-binaryen"
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read -r BINARYEN_REV < "$(dirname "$0")/binaryen.rev"
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# This works for Linux and Darwin, which is sufficient
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# (we do not build for other targets).
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OS=$(uname -s | tr A-Z a-z)
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if [ "$OS" = "darwin" ]; then
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# Binaryen uses the name "macos".
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OS="macos"
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fi
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ARCH="$(uname -m)"
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if [ "$ARCH" = "aarch64" ]; then
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# Binaryen uses the name "arm64".
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ARCH="arm64"
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fi
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install_binaryen() {
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BINARYEN_URL="https://github.com/WebAssembly/binaryen/releases/download/version_${BINARYEN_REV}/binaryen-version_${BINARYEN_REV}-${ARCH}-${OS}.tar.gz"
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install_tool "wasm-opt" $BINARYEN_REV $BINARYEN_DIR $BINARYEN_URL
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}
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install_tool() {
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TOOL=$1
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REV=$2
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TOOLCHAIN=$3
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URL=$4
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archive="$TOOLCHAIN-$REV.tar.gz"
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mark="$TOOLCHAIN.extracted"
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extracted=
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[ ! -e "$mark" ] || read -r extracted junk <$mark
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if [ "$extracted" = "$REV" ] && [ -e "$TOOLCHAIN/bin/$TOOL" ]; then
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# Already extracted, continue silently
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return 0
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fi
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echo ""
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rm -f "$archive.new" "$TOOLCHAIN.extracted"
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if [ ! -e "$archive" ]; then
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log "Need to download $TOOL '$REV' from $URL."
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curl -f -L -o "$archive.new" $URL
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rm -f "$archive"
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mv "$archive.new" "$archive"
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fi
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log "Extracting $TOOL '$REV' into '$TOOLCHAIN'." >&2
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rm -rf "$TOOLCHAIN"
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mkdir -p "$TOOLCHAIN"
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(cd "$TOOLCHAIN" && tar --strip-components=1 -xf "$archive")
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echo "$REV" >$mark
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}
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log() {
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echo "$@" >&2
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}
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if [ "${BINARYEN_DIR}" = "SKIP" ] ||
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[ "${OS}" != "macos" -a "${OS}" != "linux" ] ||
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[ "${ARCH}" != "x86_64" -a "${ARCH}" != "arm64" ]; then
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log "Unsupported OS (${OS}) and architecture (${ARCH}) combination."
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log "Using existing wasm-opt (`which wasm-opt`)."
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exec wasm-opt "$@"
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fi
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install_binaryen
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"$BINARYEN_DIR/bin/wasm-opt" "$@"
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