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