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afe19d1d81
The use of GOOS to mean "the compiler's host architecture" ends up overriding whatever GOOS the user passed in, resulting in befuddling errors like "unsupported GOOS/GOARCH pair linux/wasm" when the caller requests js/wasm. Signed-off-by: David Anderson <danderson@tailscale.com>
84 lines
2.3 KiB
Bash
Executable File
84 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# This script acts like the "go" command, but uses Tailscale's
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# currently-desired version from https://github.com/tailscale/go,
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# downloading it first if necessary.
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set -eu
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log() {
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echo "$@" >&2
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}
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DEFAULT_TOOLCHAIN_DIR="${HOME}/.cache/tailscale-go"
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TOOLCHAIN="${TOOLCHAIN-${DEFAULT_TOOLCHAIN_DIR}}"
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TOOLCHAIN_GO="${TOOLCHAIN}/bin/go"
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read -r REV < "$(dirname "$0")/../go.toolchain.rev"
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# Fast, quiet path, when Tailscale is already current.
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if [ -e "${TOOLCHAIN_GO}" ]; then
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short_hash=$("${TOOLCHAIN_GO}" version | sed 's/.*-ts//; s/ .*//')
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case $REV in
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"$short_hash"*)
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unset GOROOT
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exec "${TOOLCHAIN_GO}" "$@"
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esac
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fi
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# This works for linux and darwin, which is sufficient
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# (we do not build tailscale-go for other targets).
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host_os=$(uname -s | tr A-Z a-z)
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host_arch="$(uname -m)"
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if [ "$host_arch" = "aarch64" ]; then
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# Go uses the name "arm64".
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host_arch="arm64"
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elif [ "$host_arch" = "x86_64" ]; then
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# Go uses the name "amd64".
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host_arch="amd64"
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fi
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get_cached() {
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if [ ! -d "$TOOLCHAIN" ]; then
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mkdir -p "$TOOLCHAIN"
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fi
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archive="$TOOLCHAIN-$REV.tar.gz"
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mark="$TOOLCHAIN.extracted"
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extracted=
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# Ignore the error from read, which may error if the mark file does not contain a line end.
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read -r extracted < "$mark" || true
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if [ "$extracted" = "$REV" ] && [ -e "${TOOLCHAIN_GO}" ]; then
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# already ok
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log "Go toolchain '$REV' already extracted."
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return 0
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fi
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rm -f "$archive.new" "$TOOLCHAIN.extracted"
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if [ ! -e "$archive" ]; then
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log "Need to download go '$REV'."
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curl -f -L -o "$archive.new" "https://github.com/tailscale/go/releases/download/build-${REV}/${host_os}-${host_arch}.tar.gz"
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rm -f "$archive"
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mv "$archive.new" "$archive"
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fi
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log "Extracting tailscale/go rev '$REV'" >&2
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log " 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" >$mark
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}
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if [ "${REV}" = "SKIP" ] ||
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[ "${host_os}" != "darwin" -a "${host_os}" != "linux" ] ||
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[ "${host_arch}" != "amd64" -a "${host_arch}" != "arm64" ]; then
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# Use whichever go is available
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exec go "$@"
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else
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get_cached
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fi
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unset GOROOT
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exec "${TOOLCHAIN_GO}" "$@" |