pear-git-v3 / scripts / install.sh

#!/usr/bin/env bash
# pgh installer — P.10 Phase 0.5i
#
# Usage:
#   curl -sSfL https://7rnx.net/pgh/install.sh | sh
#   curl -sSfL https://7rnx.net/pgh/install.sh | sh -s -- --from /path/to/tarball
#   sh install.sh --from ./pgh-bootstrap-linux-x64.tar.gz
#
# What this does:
#   1. Detect OS + arch
#   2. Download (or use a local) pgh-bootstrap-<os>-<arch>.tar.gz
#   3. Extract into ~/.local/share/pgh/bootstrap/
#   4. Symlink ~/.local/bin/pgh and ~/.local/bin/pgh-sidecar
#   5. Prompt user to run `pgh init` for the network bootstrap step
#
# Nothing here requires root. If ~/.local/bin is not on PATH, we print
# the one-line snippet to add to .bashrc/.zshrc.

set -eu

PGH_VERSION_DEFAULT="0.1.0"
DEFAULT_DOWNLOAD_BASE="${PGH_DOWNLOAD_BASE:-https://7rnx.net/pgh}"

LOCAL_PREFIX="${HOME}/.local"
SHARE_DIR="${LOCAL_PREFIX}/share/pgh"
BOOTSTRAP_DIR="${SHARE_DIR}/bootstrap"
BIN_DIR="${LOCAL_PREFIX}/bin"

# ── Parse args ────────────────────────────────────────────────

SOURCE=""
VERSION="${PGH_VERSION:-$PGH_VERSION_DEFAULT}"
SKIP_PATH_WARN=0

while [ $# -gt 0 ]; do
  case "$1" in
    --from)  SOURCE="$2"; shift 2 ;;
    --version) VERSION="$2"; shift 2 ;;
    --no-path-warn) SKIP_PATH_WARN=1; shift ;;
    -h|--help)
      sed -n '2,16p' "$0"
      exit 0
      ;;
    *) echo "unknown flag: $1" >&2; exit 1 ;;
  esac
done

# ── Detect platform ───────────────────────────────────────────

os_raw="$(uname -s)"
arch_raw="$(uname -m)"

case "$os_raw" in
  Linux)   OS="linux" ;;
  Darwin)  OS="darwin" ;;
  *) echo "unsupported OS: $os_raw" >&2; exit 1 ;;
esac

case "$arch_raw" in
  x86_64|amd64)  ARCH="x64" ;;
  aarch64|arm64) ARCH="arm64" ;;
  *) echo "unsupported arch: $arch_raw" >&2; exit 1 ;;
esac

ARCH_LABEL="${OS}-${ARCH}"
TARBALL_NAME="pgh-bootstrap-${ARCH_LABEL}.tar.gz"

echo "pgh installer: ${OS}-${ARCH}, version ${VERSION}"

# ── Fetch or locate tarball ───────────────────────────────────

fetch_tarball () {
  local url="$1" out="$2"
  if command -v curl >/dev/null 2>&1; then
    curl -sSfL "$url" -o "$out"
  elif command -v wget >/dev/null 2>&1; then
    wget -qO "$out" "$url"
  else
    echo "neither curl nor wget available — install one and rerun" >&2
    exit 1
  fi
}

if [ -z "$SOURCE" ]; then
  SOURCE_URL="${DEFAULT_DOWNLOAD_BASE}/${VERSION}/${TARBALL_NAME}"
  TMPFILE="$(mktemp -u -t "${TARBALL_NAME}.XXXXXX")"
  echo "  downloading ${SOURCE_URL}"
  fetch_tarball "$SOURCE_URL" "$TMPFILE"
  SOURCE="$TMPFILE"
fi

if [ ! -f "$SOURCE" ]; then
  echo "source tarball not found: $SOURCE" >&2
  exit 1
fi

# ── Extract ───────────────────────────────────────────────────

mkdir -p "$BOOTSTRAP_DIR" "$BIN_DIR"

echo "  extracting to ${BOOTSTRAP_DIR}"
tar -xzf "$SOURCE" -C "$BOOTSTRAP_DIR"

# The tarball layout is expected to be:
#   pgh-bootstrap/
#     bin/pgh
#     bin/pgh-sidecar
#     lib/...
#     node_modules/...
#     package.json
# If the top-level is named (common), move its contents up.
if [ ! -f "$BOOTSTRAP_DIR/package.json" ] && [ -d "$BOOTSTRAP_DIR/pgh-bootstrap" ]; then
  ( cd "$BOOTSTRAP_DIR/pgh-bootstrap" && find . -maxdepth 1 -mindepth 1 -exec mv {} "$BOOTSTRAP_DIR/" \; )
  rmdir "$BOOTSTRAP_DIR/pgh-bootstrap" || true
fi

# ── Symlink launchers into ~/.local/bin ──────────────────────

link_bin () {
  local name="$1"
  local src="$BOOTSTRAP_DIR/bin/$name"
  local dst="$BIN_DIR/$name"
  if [ ! -f "$src" ]; then
    echo "  skipping (missing): $src" >&2
    return
  fi
  ln -sf "$src" "$dst"
  chmod +x "$src"
  echo "  linked ${dst} -> ${src}"
}

link_bin pgh
link_bin pgh-sidecar

# ── PATH check ────────────────────────────────────────────────

if [ "$SKIP_PATH_WARN" -ne 1 ]; then
  case ":$PATH:" in
    *":${BIN_DIR}:"*) : ;; # already on PATH
    *)
      echo
      echo "WARNING: ${BIN_DIR} is not on your PATH."
      echo "Add this line to your shell rc (~/.bashrc, ~/.zshrc, or ~/.profile):"
      echo
      echo "    export PATH=\"\$HOME/.local/bin:\$PATH\""
      echo
      ;;
  esac
fi

# ── Final instructions ────────────────────────────────────────

echo
echo "pgh installed. Next step:"
echo
echo "    pgh init"
echo
echo "which sets up your identity + tree store and joins the bootstrap"
echo "topic to pull the live pgh runtime. Pass --offline to skip network."
echo

exit 0