tree 344f146f821e6742e3d98af1926cf09d47133257
parent f3c6ce84371d3800c8340bd3ddfbbf32e8ea74b9
author Bazel Release System <noreply@google.com> 1543588453 +0100
committer Dmitry Lomov <dslomov@google.com> 1543588453 +0100

Release 0.20.0 (2018-11-30)

Baseline: 7bf7f031c332dc483257248d1c1f98ad75bbc83b

Cherry picks:

   + fd52341505e725487c6bc6dfbe6b5e081aa037da:
     update bazel-toolchains pin to latest release Part of changes to
     allow bazelci to use 0.19.0 configs. RBE toolchain configs at or
     before 0.17.0 are not compatible with bazel 0.19.0 or above.
   + 241f28d05424db2d11ee245dc856b992258505e3:
     Revert "Toggle --incompatible_disable_late_bound_option_defaults
     flag."
   + f7e5aef145c33968f658eb2260e25630dc41cc67:
     Add cc_toolchain targets for the new entries in the default
     cc_toolchain_suite.
   + d2920e32ec7f3f8551a693d33c17b19f1b802145:
     Revert "WindowsFileSystem: open files with delete-sharing"

[Breaking changes in 0.20](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.20)

  - [--incompatible_remove_native_http_archive](https://github.com/bazelbuild/bazel/issues/6570).
  - [--incompatible_remove_native_git_repository](https://github.com/bazelbuild/bazel/issues/6569).
  - [--incompatible_disable_cc_toolchain_label_from_crosstool_proto](https://github.com/bazelbuild/bazel/issues/6434).
  - [--incompatible_disable_depset_in_cc_user_flags](https://github.com/bazelbuild/bazel/issues/6384).
  - [--incompatible_disable_cc_configuration_make_variables](https://github.com/bazelbuild/bazel/issues/6381).
  - [--incompatible_disallow_conflicting_providers](https://github.com/bazelbuild/bazel/issues/5902).
  - [--incompatible_range_type](https://github.com/bazelbuild/bazel/issues/5264).

[0.20 is a migration window for the following changes](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Amigration-0.20)

  - [--incompatible_use_jdk10_as_host_javabase](https://github.com/bazelbuild/bazel/issues/6661)
  - [--incompatible_use_remotejdk_as_host_javabase](https://github.com/bazelbuild/bazel/issues/6656)
  - [--incompatible_disable_sysroot_from_configuration](https://github.com/bazelbuild/bazel/issues/6565)
  - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](https://github.com/bazelbuild/bazel/issues/6537)
  - [--incompatible_disable_depset_in_cc_user_flags](https://github.com/bazelbuild/bazel/issues/6383)
  - [--incompatible_package_name_is_a_function](https://github.com/bazelbuild/bazel/issues/5827)

[Breaking changes in the next release (0.21)](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.21)

  - [--incompatible_use_jdk10_as_host_javabase](https://github.com/bazelbuild/bazel/issues/6661)
  - [--incompatible_use_remotejdk_as_host_javabase](https://github.com/bazelbuild/bazel/issues/6656)
  - [--incompatible_disable_sysroot_from_configuration](https://github.com/bazelbuild/bazel/issues/6565)
  - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](https://github.com/bazelbuild/bazel/issues/6537)
  - [--incompatible_disable_depset_in_cc_user_flags](https://github.com/bazelbuild/bazel/issues/6383)
  - [--incompatible_disallow_data_transition](https://github.com/bazelbuild/bazel/issues/6153)
  - [--incompatible_package_name_is_a_function](https://github.com/bazelbuild/bazel/issues/5827)
  - [--incompatible_disallow_slash_operator](https://github.com/bazelbuild/bazel/issues/5823)
  - [--incompatible_static_name_resolution](https://github.com/bazelbuild/bazel/issues/5637)

Incompatible changes:

  - the --experimental_no_dotd_scanning_with_modules command line
    argument is not supported anymore.
  - The --prune_cpp_modules command line option is not supported
    anymore.
  - the --experimental_prune_cpp_input_discovery command line option
    is not supported anymore.

New features:

  - Added support for Android NDK r18.

Important changes:

  - The 'default' parameter of attr.output and attr.output_list is
    removed. This is controlled by
    --incompatible_no_output_attr_default
  - A number of platform-related Starlark APIs which were previously
    marked "experimental" are now disabled by default, and may be
    enabled via --experimental_platforms_api
  - Make legacy-test-support ("legacy_test-<api-level>") from
    android_sdk_repository neverlink. The legacy test support
    libraries shouldn't be built into test binaries. To make them
    available at runtime, developers should declare them via
    uses-library:
    https://developer.android.com/training/testing/set-up-project#andr
    oid-test-base
  - query remote server Capabilities (per REAPI v2)
  - CppRules: All cc_toolchains depended on from
    cc_toolchain_suite.toolchains are now analyzed when not using
    platforms in order to select the right cc_toolchain.
  - removed obsolete --explicit_jre_deps flag.
  - Incompatible flag
    --incompatible_disable_legacy_cpp_toolchain_skylark_api was
    flipped.
  - Improve error messaging when unsupport proguard options are
    specified at the library level.
  - Incompatible flag
    --incompatible_disable_legacy_cpp_toolchain_skylark_api was
    flipped.
  - Incompatible flag
    --incompatible_disable_legacy_cpp_toolchain_skylark_api was
    flipped.
  - The --incompatible_disable_late_bound_option_defaults flag has
    been flipped (#6384)
  - Incompatible flag
    --incompatible_disable_legacy_flags_cc_toolchain_api was flipped
    (#6434)
  - Fixed issue where ctx.resolve_command created conflicting
    intermediate files when resolve_command was called multiple times
    within the same rule invocation with a long command attribute.
  - Incompatible flag
    --incompatible_disable_cc_configuration_make_variables was
    flipped (#6381)
  - If the --javabase flag is unset, it Bazel locates a JDK using
    the JAVA_HOME environment variable and searching the PATH. If no
    JDK is found --javabase will be empty, and builds targeting Java
    will not
    be supported. Previously Bazel would fall back to using the
    embedded
    JDK as a --javabase, but this is no longer default behaviour. A
    JDK should
    be explicitly installed instead to enable Java development
  - Bazel will now shut down when idle for 5 minutes and the system
    is low on RAM (linux only).
  - CROSSTOOL file is now read from the package of cc_toolchain, not
    from
    the package of cc_toolchain_suite. This is not expected to break
    anybody since
    cc_toolchain_suite and cc_toolchain are commonly in the same
    package.
  - All overrides of Starlark's ctx.new_file function are now
    deprecated.
      Try the `--incompatible_new_actions_api` flag to ensure your
    code is forward-compatible.
  - --incompatible_disable_cc_toolchain_label_from_crosstool_proto
    was flipped.
  - Introduce --(no)shutdown_on_low_sys_mem startup flag to toggle
    idle low-memory shutdown, disabled by default.
  - --incompatible_disable_cc_toolchain_label_from_crosstool_proto
    was flipped.
  - --incompatible_disable_cc_toolchain_label_from_crosstool_proto
    was flipped.
  - CppRules: All cc_toolchains depended on from
    cc_toolchain_suite.toolchains are now analyzed when not using
    platforms in order to select the right cc_toolchain.
  - The function `attr.license` is deprecated and will be removed.
      It can be disabled now with `--incompatible_no_attr_license`.
  - `range()` function now returns a lazy value
    (`--incompatible_range_type` is now set by default).
  - The code coverage report now includes the actual paths to header
    files instead of the ugly,
    Bazel generated, virtual includes path.
  - `--incompatible_disallow_conflicting_providers` has been switched
    to true
  - Add new flag `--incompatible_disable_systool_from_configration` to
    disable loading the systool from CppConfiguration.
  - Add new flag `--incompatible_disable_sysroot_from_configuration`
    to
    disable loading the systool from CppConfiguration.
  - Sorting remote Platform properties for remote execution. May
    affect cache keys!
  - Use different server log files per Bazel server process; java.log
    is
    now a symlink to the latest log.

This release contains contributions from many people at Google, as well as a7g4 <a7g4@a7g4.net>, Alan <alan.agius@betssongroup.com>, Asaf Flescher <asafflesch@gmail.com>, Benjamin Peterson <bp@benjamin.pe>, Ed Schouten <ed.schouten@prodrive-technologies.com>, George Gensure <ggensure@uber.com>, George Kalpakas <kalpakas.g@gmail.com>, Greg <gregestren@users.noreply.github.com>, Irina Iancu <iirina@users.noreply.github.com>, Keith Smiley <keithbsmiley@gmail.com>, Loo Rong Jie <loorongjie@gmail.com>, Mark Zeren <mzeren@vmware.com>, Petros Eskinder <petroseskinder@users.noreply.github.com>, rachcatch <rachelcatchpoole@hotmail.com>, Robert Brown <robert.brown@gmail.com>, Robert Gay <robert.gay@redfin.com>, Salty Egg <2281521+zhouhao@users.noreply.github.com>.