tools/devshell/contrib/ffx

#!/bin/bash
# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

#### CATEGORY=Other
### execute ffx - developer tools for fuchsia devices.
## See fx ffx help for more information.

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/../lib/vars.sh || exit $?
fx-config-read

# Parse arguments to find the subcommand, skipping global flags
subcommand=""
skip_next=false
for arg in "$@"; do
  if $skip_next; then
    skip_next=false
    continue
  fi
  case "$arg" in
    -c|--config|-e|--env|--env-root|--machine|--stamp|-t|--target|--timeout|-l|--log-level|--isolate-dir|-o|--log-output)
      skip_next=true
      ;;
    --schema|-v|--verbose|--no-environment|--strict|-d|--direct)
      ;;
    -*)
      ;;
    *)
      subcommand="$arg"
      break
      ;;
  esac
done

if [[ -n "$subcommand" ]]; then
  toolname="ffx-$subcommand"

  # 1. Check if the tool already exists on disk to avoid latency
  if [[ ! -f "${FUCHSIA_BUILD_DIR}/host-tools/${toolname}" ]]; then
    # 2. Fast check if it's a known external tool in ffx_tools.json.
    # This avoids calling list-build-artifacts for built-in commands.
    if [[ -f "${FUCHSIA_BUILD_DIR}/ffx_tools.json" ]] && grep -q "\"name\": \"${toolname}\"" "${FUCHSIA_BUILD_DIR}/ffx_tools.json"; then
      # 3. Only run list-build-artifacts if it's a known tool
      if fx-command-run list-build-artifacts --name "${toolname}" tools >/dev/null 2>&1; then
        echo "Building required subtool '${toolname}'..." 1>&2
        # 4. Do not suppress stderr so build failures are visible.
        # NOTE: We hardcode 'host-tools/' here instead of using the path
        # returned by list-build-artifacts (which might be 'host_x64/')
        # because we need to trigger the install step that places the tool
        # in 'host-tools/' where ffx expects it according to ffx_tools.json.
        fx-command-run build "host-tools/${toolname}" >/dev/null
      fi
    fi
  fi
fi

fx-command-exec host-tool ffx  "$@"