install-git.sh

install-gh.sh

  #!/usr/bin/env bash
  # SessionStart hook: install/update GitHub CLI (gh) on Claude Code on the Web

  set -euo pipefail
  LOG_PREFIX="[gh-setup]"
  log(){ echo "$LOG_PREFIX $*" >&2; }

  # Only run in Claude Code on the Web
  if [[ "${CLAUDE_CODE_REMOTE:-}" != "true" ]]; then
    log "Not a remote session, skipping."
    exit 0
  fi

  LOCAL_BIN="${HOME}/.local/bin"
  mkdir -p "$LOCAL_BIN"

  ensure_path() {
    if [[ ":${PATH}:" != *":${LOCAL_BIN}:"* ]]; then
      export PATH="${LOCAL_BIN}:${PATH}"
    fi

    if [[ -n "${CLAUDE_ENV_FILE:-}" ]]; then
      if ! grep -q 'export PATH="'"${LOCAL_BIN}"':\$PATH"' "$CLAUDE_ENV_FILE" 2>/dev/null; then
        echo 'export PATH="'"${LOCAL_BIN}"':$PATH"' >> "$CLAUDE_ENV_FILE"
        log "PATH persisted to CLAUDE_ENV_FILE"
      fi

      if [[ -n "${GITHUB_TOKEN:-}" && -z "${GH_TOKEN:-}" ]]; then
        if ! grep -q 'export GH_TOKEN=' "$CLAUDE_ENV_FILE" 2>/dev/null; then
          echo 'export GH_TOKEN="${GITHUB_TOKEN}"' >> "$CLAUDE_ENV_FILE"
          log "GH_TOKEN persisted (from GITHUB_TOKEN)"
        fi
        export GH_TOKEN="${GITHUB_TOKEN}"
      fi
    fi
  }

  # If gh already exists, use it
  if command -v gh >/dev/null 2>&1; then
    ensure_path
    log "gh already available: $(gh --version | head -1)"
    exit 0
  fi

  if [[ -x "${LOCAL_BIN}/gh" ]]; then
    ensure_path
    log "gh found in ${LOCAL_BIN}: $(${LOCAL_BIN}/gh --version | head -1)"
    exit 0
  fi

  need() { command -v "$1" >/dev/null 2>&1 || { log "Missing dependency: $1"; exit 0; }; }
  need curl
  need tar
  need jq

  ARCH="$(uname -m)"
  case "$ARCH" in
    x86_64|amd64) GH_ARCH="amd64" ;;
    aarch64|arm64) GH_ARCH="arm64" ;;
    *) log "Unsupported architecture: $ARCH"; exit 0 ;;
  esac

  OS_NAME="linux"
  API="https://api.github.com/repos/cli/cli/releases/latest"

  auth_header=()
  if [[ -n "${GITHUB_TOKEN:-}" ]]; then
    auth_header=(-H "Authorization: Bearer ${GITHUB_TOKEN}")
  elif [[ -n "${GH_TOKEN:-}" ]]; then
    auth_header=(-H "Authorization: Bearer ${GH_TOKEN}")
  fi

  TMP_DIR="$(mktemp -d)"
  trap 'rm -rf "$TMP_DIR"' EXIT

  log "Remote session detected. Installing gh into ${LOCAL_BIN} ..."

  RELEASE_JSON="${TMP_DIR}/latest.json"
  if ! curl -fsSL ${auth_header[@]+"${auth_header[@]}"} "$API" -o "$RELEASE_JSON"; then
    log "Failed to fetch latest release metadata (GitHub API)."
    exit 0
  fi

  if [[ ! -s "$RELEASE_JSON" ]]; then
    log "GitHub API returned empty response."
    exit 0
  fi

  TAG="$(jq -r '.tag_name' "$RELEASE_JSON")"
  if [[ -z "$TAG" || "$TAG" == "null" ]]; then
    log "Could not parse tag_name from release."
    exit 0
  fi
  VER="${TAG#v}"

  TARBALL="gh_${VER}_${OS_NAME}_${GH_ARCH}.tar.gz"
  ASSET_URL="$(jq -r --arg name "$TARBALL" '.assets[] | select(.name == $name) | .browser_download_url' "$RELEASE_JSON")"

  if [[ -z "$ASSET_URL" || "$ASSET_URL" == "null" ]]; then
    log "Could not find asset for ${TARBALL} in latest release."
    exit 0
  fi

  log "Latest release: ${TAG}"
  log "Downloading: ${TARBALL}"

  if ! curl -fL --retry 3 --retry-delay 1 "$ASSET_URL" -o "${TMP_DIR}/${TARBALL}"; then
    log "Failed to download gh tarball."
    exit 0
  fi

  log "Extracting..."
  if ! tar -xzf "${TMP_DIR}/${TARBALL}" -C "$TMP_DIR"; then
    log "Failed to extract."
    exit 0
  fi

  BIN_PATH="$(find "$TMP_DIR" -type f -path "*/bin/gh" | head -n 1)"
  if [[ -z "$BIN_PATH" ]]; then
    log "gh binary not found after extract."
    exit 0
  fi

  install -m 0755 "$BIN_PATH" "${LOCAL_BIN}/gh"
  ensure_path

  log "gh installed: $(gh --version | head -1)"
  exit 0

例: curl -fsSL https://gist.githubusercontent.com/bannzai/28441d7b101c49c2aa04ad1f5d580d4e/raw/install-gh.sh | bash

Edit: ~/.claude/settings.json

 "hooks": {
    "SessionStart": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "curl -fsSL https://gist.githubusercontent.com/bannzai/28441d7b101c49c2aa04ad1f5d580d4e/raw/install-gh.sh | bash"
          }
        ]
      }
    ]
  }