Merge pull request #1768 from ahoppen/show-bin-path-4.2

[4.2] Add option to show bin build directory (cherry-pick #1763)

Utilities/bootstrap

@@ -815,6 +815,9 @@ def main():
  help="Extra actions to perform. Can be any number of "
  "the following: [clean, all, test, install]",
  nargs="*", default=["all"])
+ parser.add_argument("--show-bin-path", action='store_true',
+ help="output the path to which the swiftpm binaries "
+ "are built")
  parser.add_argument("--swiftc", dest="swiftc_path",
  help="path to the swift compiler [%(default)s]",
  metavar="PATH")
@@ -915,6 +918,13 @@ def main():
  sandbox_path = os.path.join(build_path, ".bootstrap")
  target_path = os.path.join(build_path, build_target)
 
+ libdir = os.path.join(target_path, "lib")
+ bindir = os.path.join(target_path, conf)
+
+ if args.show_bin_path:
+ print(bindir)
+ sys.exit(0)
+
  # Confirm rsync is available.
  try:
  subprocess.check_output(['rsync', '--version'], stderr=subprocess.STDOUT)
@@ -963,9 +973,6 @@ def main():
  processed_runtimes[version] = process_runtime_libraries(
  build, args, lib_path)
 
-
- libdir = os.path.join(target_path, "lib")
- bindir = os.path.join(target_path, conf)
  mkdir_p(bindir)
  bootstrapped_product = os.path.join(bindir, "swift-build-stage1")