bazel.Tiltfile

# -*- mode: Python -*-

# This file was derived from Tilt's bazel example:
# https://github.com/tilt-dev/tilt-example-bazel/blob/main/3-recommended/bazel.Tiltfile
# In order to achieve proper live-reload we need a function to query bazel dependencies.

BAZEL_SOURCES_CMD_TEMPLATE = """
  bazel query 'filter("^//", kind("source file", deps(set(%s))))' --order_output=no
  """.strip()

def bazel_labels_to_files(labels):
  files = {}
  for l in labels:
    if l.startswith("//external/") or l.startswith("//external:"):
      continue
    elif l.startswith("//"):
      l = l[2:]

    path = l.replace(":", "/")
    if path.startswith("/"):
      path = path[1:]

    files[path] = None

  return files.keys()

def bazel_sourcefile_deps(target):
  return bazel_labels_to_files(str(local(BAZEL_SOURCES_CMD_TEMPLATE % target)).splitlines())