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-rwxr-xr-xthird_party/abseil_cpp/absl/abseil.podspec.gen.py229
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diff --git a/third_party/abseil_cpp/absl/abseil.podspec.gen.py b/third_party/abseil_cpp/absl/abseil.podspec.gen.py
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--- a/third_party/abseil_cpp/absl/abseil.podspec.gen.py
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-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-"""This script generates abseil.podspec from all BUILD.bazel files.
-
-This is expected to run on abseil git repository with Bazel 1.0 on Linux.
-It recursively analyzes BUILD.bazel files using query command of Bazel to
-dump its build rules in XML format. From these rules, it constructs podspec
-structure.
-"""
-
-import argparse
-import collections
-import os
-import re
-import subprocess
-import xml.etree.ElementTree
-
-# Template of root podspec.
-SPEC_TEMPLATE = """
-# This file has been automatically generated from a script.
-# Please make modifications to `abseil.podspec.gen.py` instead.
-Pod::Spec.new do |s|
-  s.name     = 'abseil'
-  s.version  = '${version}'
-  s.summary  = 'Abseil Common Libraries (C++) from Google'
-  s.homepage = 'https://abseil.io'
-  s.license  = 'Apache License, Version 2.0'
-  s.authors  = { 'Abseil Team' => 'abseil-io@googlegroups.com' }
-  s.source = {
-    :git => 'https://github.com/abseil/abseil-cpp.git',
-    :tag => '${tag}',
-  }
-  s.module_name = 'absl'
-  s.header_mappings_dir = 'absl'
-  s.header_dir = 'absl'
-  s.libraries = 'c++'
-  s.compiler_flags = '-Wno-everything'
-  s.pod_target_xcconfig = {
-    'USER_HEADER_SEARCH_PATHS' => '$(inherited) "$(PODS_TARGET_SRCROOT)"',
-    'USE_HEADERMAP' => 'NO',
-    'ALWAYS_SEARCH_USER_PATHS' => 'NO',
-  }
-  s.ios.deployment_target = '9.0'
-  s.osx.deployment_target = '10.10'
-  s.tvos.deployment_target = '9.0'
-  s.watchos.deployment_target = '2.0'
-"""
-
-# Rule object representing the rule of Bazel BUILD.
-Rule = collections.namedtuple(
-    "Rule", "type name package srcs hdrs textual_hdrs deps visibility testonly")
-
-
-def get_elem_value(elem, name):
-  """Returns the value of XML element with the given name."""
-  for child in elem:
-    if child.attrib.get("name") != name:
-      continue
-    if child.tag == "string":
-      return child.attrib.get("value")
-    if child.tag == "boolean":
-      return child.attrib.get("value") == "true"
-    if child.tag == "list":
-      return [nested_child.attrib.get("value") for nested_child in child]
-    raise "Cannot recognize tag: " + child.tag
-  return None
-
-
-def normalize_paths(paths):
-  """Returns the list of normalized path."""
-  # e.g. ["//absl/strings:dir/header.h"] -> ["absl/strings/dir/header.h"]
-  return [path.lstrip("/").replace(":", "/") for path in paths]
-
-
-def parse_rule(elem, package):
-  """Returns a rule from bazel XML rule."""
-  return Rule(
-      type=elem.attrib["class"],
-      name=get_elem_value(elem, "name"),
-      package=package,
-      srcs=normalize_paths(get_elem_value(elem, "srcs") or []),
-      hdrs=normalize_paths(get_elem_value(elem, "hdrs") or []),
-      textual_hdrs=normalize_paths(get_elem_value(elem, "textual_hdrs") or []),
-      deps=get_elem_value(elem, "deps") or [],
-      visibility=get_elem_value(elem, "visibility") or [],
-      testonly=get_elem_value(elem, "testonly") or False)
-
-
-def read_build(package):
-  """Runs bazel query on given package file and returns all cc rules."""
-  result = subprocess.check_output(
-      ["bazel", "query", package + ":all", "--output", "xml"])
-  root = xml.etree.ElementTree.fromstring(result)
-  return [
-      parse_rule(elem, package)
-      for elem in root
-      if elem.tag == "rule" and elem.attrib["class"].startswith("cc_")
-  ]
-
-
-def collect_rules(root_path):
-  """Collects and returns all rules from root path recursively."""
-  rules = []
-  for cur, _, _ in os.walk(root_path):
-    build_path = os.path.join(cur, "BUILD.bazel")
-    if os.path.exists(build_path):
-      rules.extend(read_build("//" + cur))
-  return rules
-
-
-def relevant_rule(rule):
-  """Returns true if a given rule is relevant when generating a podspec."""
-  return (
-      # cc_library only (ignore cc_test, cc_binary)
-      rule.type == "cc_library" and
-      # ignore empty rule
-      (rule.hdrs + rule.textual_hdrs + rule.srcs) and
-      # ignore test-only rule
-      not rule.testonly)
-
-
-def get_spec_var(depth):
-  """Returns the name of variable for spec with given depth."""
-  return "s" if depth == 0 else "s{}".format(depth)
-
-
-def get_spec_name(label):
-  """Converts the label of bazel rule to the name of podspec."""
-  assert label.startswith("//absl/"), "{} doesn't start with //absl/".format(
-      label)
-  # e.g. //absl/apple/banana -> abseil/apple/banana
-  return "abseil/" + label[7:]
-
-
-def write_podspec(f, rules, args):
-  """Writes a podspec from given rules and args."""
-  rule_dir = build_rule_directory(rules)["abseil"]
-  # Write root part with given arguments
-  spec = re.sub(r"\$\{(\w+)\}", lambda x: args[x.group(1)],
-                SPEC_TEMPLATE).lstrip()
-  f.write(spec)
-  # Write all target rules
-  write_podspec_map(f, rule_dir, 0)
-  f.write("end\n")
-
-
-def build_rule_directory(rules):
-  """Builds a tree-style rule directory from given rules."""
-  rule_dir = {}
-  for rule in rules:
-    cur = rule_dir
-    for frag in get_spec_name(rule.package).split("/"):
-      cur = cur.setdefault(frag, {})
-    cur[rule.name] = rule
-  return rule_dir
-
-
-def write_podspec_map(f, cur_map, depth):
-  """Writes podspec from rule map recursively."""
-  for key, value in sorted(cur_map.items()):
-    indent = "  " * (depth + 1)
-    f.write("{indent}{var0}.subspec '{key}' do |{var1}|\n".format(
-        indent=indent,
-        key=key,
-        var0=get_spec_var(depth),
-        var1=get_spec_var(depth + 1)))
-    if isinstance(value, dict):
-      write_podspec_map(f, value, depth + 1)
-    else:
-      write_podspec_rule(f, value, depth + 1)
-    f.write("{indent}end\n".format(indent=indent))
-
-
-def write_podspec_rule(f, rule, depth):
-  """Writes podspec from given rule."""
-  indent = "  " * (depth + 1)
-  spec_var = get_spec_var(depth)
-  # Puts all files in hdrs, textual_hdrs, and srcs into source_files.
-  # Since CocoaPods treats header_files a bit differently from bazel,
-  # this won't generate a header_files field so that all source_files
-  # are considered as header files.
-  srcs = sorted(set(rule.hdrs + rule.textual_hdrs + rule.srcs))
-  write_indented_list(
-      f, "{indent}{var}.source_files = ".format(indent=indent, var=spec_var),
-      srcs)
-  # Writes dependencies of this rule.
-  for dep in sorted(rule.deps):
-    name = get_spec_name(dep.replace(":", "/"))
-    f.write("{indent}{var}.dependency '{dep}'\n".format(
-        indent=indent, var=spec_var, dep=name))
-
-
-def write_indented_list(f, leading, values):
-  """Writes leading values in an indented style."""
-  f.write(leading)
-  f.write((",\n" + " " * len(leading)).join("'{}'".format(v) for v in values))
-  f.write("\n")
-
-
-def generate(args):
-  """Generates a podspec file from all BUILD files under absl directory."""
-  rules = filter(relevant_rule, collect_rules("absl"))
-  with open(args.output, "wt") as f:
-    write_podspec(f, rules, vars(args))
-
-
-def main():
-  parser = argparse.ArgumentParser(
-      description="Generates abseil.podspec from BUILD.bazel")
-  parser.add_argument(
-      "-v", "--version", help="The version of podspec", required=True)
-  parser.add_argument(
-      "-t",
-      "--tag",
-      default=None,
-      help="The name of git tag (default: version)")
-  parser.add_argument(
-      "-o",
-      "--output",
-      default="abseil.podspec",
-      help="The name of output file (default: abseil.podspec)")
-  args = parser.parse_args()
-  if args.tag is None:
-    args.tag = args.version
-  generate(args)
-
-
-if __name__ == "__main__":
-  main()