#!/bin/sh
# acyclic CLI installer. Reads no input, writes one binary, prints where it went.
#   curl -fsSL https://acyclic.dev/install.sh | sh
#   curl -fsSL https://acyclic.dev/install.sh | ACYCLIC_INSTALL_DIR=/usr/local/bin sh
set -eu

version="0.0.6"
os="$(uname -s)"
arch="$(uname -m)"
# Apple reports arm64; Linux reports aarch64. Normalise to what the manifest uses per-OS.
if [ "$os" = "Linux" ] && [ "$arch" = "arm64" ]; then arch="aarch64"; fi
if [ "$os" = "Darwin" ] && [ "$arch" = "aarch64" ]; then arch="arm64"; fi

triple=""
url=""
sha=""
case "$os:$arch" in
    Darwin:arm64) triple="aarch64-apple-darwin"; url="https://acyclic.dev/dl/0.0.6/acyclic-0.0.6-aarch64-apple-darwin.tar.gz"; sha="ad2d08a8760388d722920b0f55dae8130582336e55b6da26954983d0877a52d9" ;;
    Darwin:x86_64) triple="x86_64-apple-darwin"; url="https://acyclic.dev/dl/0.0.6/acyclic-0.0.6-x86_64-apple-darwin.tar.gz"; sha="5622a77b80c5b08c1ba6312861a3b5967da860e7be491738845bf4cc542254e9" ;;
    Linux:x86_64) triple="x86_64-unknown-linux-musl"; url="https://acyclic.dev/dl/0.0.6/acyclic-0.0.6-x86_64-unknown-linux-musl.tar.gz"; sha="f636f7dcb8055cbfb3eb4fa4166d76a0513e5f33a08f493b40c076db1065f9ec" ;;
    Linux:aarch64) triple="aarch64-unknown-linux-musl"; url="https://acyclic.dev/dl/0.0.6/acyclic-0.0.6-aarch64-unknown-linux-musl.tar.gz"; sha="609b13ae4bec6b504a4ecd4c33c89c50e18559c9fb92bddea8eff9a30ff59641" ;;
    *)
        echo "acyclic: no published build for $os $arch." >&2
        echo "Supported: Darwin arm64, Darwin x86_64, Linux x86_64, Linux aarch64" >&2
        echo "You can use swarms over MCP with nothing installed: https://acyclic.dev/dashboard" >&2
        exit 1
        ;;
esac

dir="${ACYCLIC_INSTALL_DIR:-$HOME/.local/bin}"
tmp="$(mktemp -d)"
# Clean up whatever happens, including a failed download or a failed checksum.
trap 'rm -rf "$tmp"' EXIT INT TERM

echo "acyclic $version — downloading $triple" >&2
if command -v curl >/dev/null 2>&1; then
    curl -fsSL "$url" -o "$tmp/archive.tar.gz"
elif command -v wget >/dev/null 2>&1; then
    wget -qO "$tmp/archive.tar.gz" "$url"
else
    echo "acyclic: need curl or wget." >&2
    exit 1
fi

# The expected digest is baked in above, from the same manifest that produced the URL, so there is
# no second request to fail and nothing to skip.
if command -v sha256sum >/dev/null 2>&1; then
    actual="$(sha256sum "$tmp/archive.tar.gz" | cut -d' ' -f1)"
elif command -v shasum >/dev/null 2>&1; then
    actual="$(shasum -a 256 "$tmp/archive.tar.gz" | cut -d' ' -f1)"
else
    actual=""
fi
if [ -z "$actual" ]; then
    echo "acyclic: no sha256sum or shasum available; installing unverified." >&2
elif [ "$actual" != "$sha" ]; then
    echo "acyclic: checksum mismatch — refusing to install." >&2
    echo "  expected $sha" >&2
    echo "  actual   $actual" >&2
    exit 1
else
    echo "acyclic: checksum verified" >&2
fi

tar -xzf "$tmp/archive.tar.gz" -C "$tmp"
[ -f "$tmp/acyclic" ] || { echo "acyclic: archive did not contain the binary." >&2; exit 1; }

mkdir -p "$dir"
mv "$tmp/acyclic" "$dir/acyclic"
chmod +x "$dir/acyclic"

echo "" >&2
echo "acyclic installed to $dir/acyclic" >&2
case ":$PATH:" in
    *":$dir:"*) ;;
    *) echo "  $dir is not on your PATH — add it, or run $dir/acyclic directly." >&2 ;;
esac
echo "" >&2
echo "Next:  acyclic swarm login --site https://acyclic.dev" >&2
echo "Then:  acyclic swarm run --task \"fix the flaky test\" --dir . --watch" >&2