#!/bin/sh
# rigger installer for macOS and Linux:
#   curl -fsSL https://raw.githubusercontent.com/lacodda/rigger/main/tools/install.sh | sh
set -eu

REPO="lacodda/rigger"

case "$(uname -s)-$(uname -m)" in
    Linux-x86_64) TARGET="x86_64-unknown-linux-gnu" ;;
    Darwin-arm64) TARGET="aarch64-apple-darwin" ;;
    # Git Bash, MSYS2 and Cygwin run this script happily on Windows, where it
    # has no business being: the Windows build is installed by install.ps1.
    # Saying so beats the generic "no prebuilt binary" dead end, since a
    # Windows release does exist - just not for this installer.
    MINGW*|MSYS*|CYGWIN*)
        echo "This is the macOS/Linux installer, but you are on Windows ($(uname -s))." >&2
        echo "Install with PowerShell instead:" >&2
        echo "  irm https://raw.githubusercontent.com/$REPO/main/tools/install.ps1 | iex" >&2
        exit 1
        ;;
    *)
        echo "No prebuilt binary for $(uname -s)/$(uname -m); install with: cargo install rigger" >&2
        exit 1
        ;;
esac

# The tag comes from the /releases/latest redirect rather than the REST API:
# unauthenticated API calls are capped at 60 per hour per IP, and an installer
# that fails because someone else on the same address ran it is no installer.
# RIGGER_VERSION pins a specific release.
TAG="${RIGGER_VERSION:-}"
if [ -z "$TAG" ]; then
    LOCATION=$(curl -fsSLI -o /dev/null -w '%{url_effective}' "https://github.com/$REPO/releases/latest" || true)
    TAG="${LOCATION##*/}"
fi
case "$TAG" in
    v[0-9]*) ;;
    *)
        echo "Cannot resolve the latest release of $REPO - set RIGGER_VERSION to a tag like v0.1.0" >&2
        exit 1
        ;;
esac

NAME="rigger-$TAG-$TARGET"
URL="https://github.com/$REPO/releases/download/$TAG/$NAME.tar.gz"
TMP=$(mktemp -d)
trap 'rm -rf "$TMP"' EXIT

echo "Downloading $URL"
curl -fsSL "$URL" | tar xz -C "$TMP"

BIN_DIR="${RIGGER_INSTALL_DIR:-$HOME/.local/bin}"
mkdir -p "$BIN_DIR"
install -m 755 "$TMP/$NAME/rigger" "$BIN_DIR/rigger"
echo "Installed rigger $TAG to $BIN_DIR/rigger"

# Short alias `rgr`, unless something else in PATH already answers to that name
# (ours from a previous run does not count). RIGGER_NO_ALIAS=1 skips it.
# A symlink, never a second binary: one set of bytes answers to both names, so
# `rgr` can never fall behind the version `rigger` was updated to. The archive
# carries one binary and no `rgr` of its own.
#
# The name is `rgr` rather than `rr`, which would have matched the mark: `rr`
# is Mozilla's record-and-replay debugger, packaged in every distribution.
if [ -z "${RIGGER_NO_ALIAS:-}" ]; then
    EXISTING=$(command -v rgr 2>/dev/null || true)
    if [ -z "$EXISTING" ] || [ "$EXISTING" = "$BIN_DIR/rgr" ]; then
        ln -sf rigger "$BIN_DIR/rgr"
        echo "Alias rgr -> rigger"
    else
        echo "Note: 'rgr' already resolves to $EXISTING - alias skipped."
    fi
fi

case ":$PATH:" in
    *":$BIN_DIR:"*) ;;
    *) echo "Note: add $BIN_DIR to your PATH." ;;
esac
echo "Next: run 'rigger init'"