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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970#!/usr/bin/env bash
# installs $(cat ./helm.rev) version of helm as $HOME/.cache/tailscale-helm
set -euo pipefail
if [[ "${CI:-}" == "true" ]]; then set -xfi
( if [[ "${CI:-}" == "true" ]]; then set -x fi
repo_root="${BASH_SOURCE%/*}/../" cd "$repo_root"
cachedir="$HOME/.cache/tailscale-helm" tarball="${cachedir}.tar.gz"
read -r want_rev < "$(dirname "$0")/helm.rev"
got_rev="" if [[ -x "${cachedir}/helm" ]]; then got_rev=$("${cachedir}/helm" version --short) got_rev="${got_rev#v}" # trim the leading 'v' got_rev="${got_rev%+*}" # trim the trailing '+" followed by a commit SHA'
fi
if [[ "$want_rev" != "$got_rev" ]]; then rm -rf "$cachedir" "$tarball" if [[ -n "${IN_NIX_SHELL:-}" ]]; then nix_helm="$(which -a helm | grep /nix/store | head -1)" nix_helm="${nix_helm%/helm}" nix_helm_rev="${nix_helm##*-}" if [[ "$nix_helm_rev" != "$want_rev" ]]; then echo "Wrong helm version in Nix, got $nix_helm_rev want $want_rev" >&2 exit 1 fi ln -sf "$nix_helm" "$cachedir" else # works for linux and darwin # https://github.com/helm/helm/releases OS=$(uname -s | tr A-Z a-z) ARCH=$(uname -m) if [ "$ARCH" = "x86_64" ]; then ARCH="amd64" fi if [ "$ARCH" = "aarch64" ]; then ARCH="arm64" fi mkdir -p "$cachedir" # When running on GitHub in CI, the below curl sometimes fails with # INTERNAL_ERROR after finishing the download. The most common cause # of INTERNAL_ERROR is glitches in intermediate hosts handling of # HTTP/2 forwarding, so forcing HTTP 1.1 often fixes the issue. See # https://github.com/tailscale/tailscale/issues/8988 curl -f -L --http1.1 -o "$tarball" -sSL "https://get.helm.sh/helm-v${want_rev}-${OS}-${ARCH}.tar.gz" (cd "$cachedir" && tar --strip-components=1 -xf "$tarball") rm -f "$tarball" fi fi)
export PATH="$HOME/.cache/tailscale-helm:$PATH"exec "$HOME/.cache/tailscale-helm/helm" "$@"