Release 3.7.0 (2020-10-20)

Baseline: a991db7

Incompatible changes:

  - The syntax //foo/BUILD can no longer be used on the command line
    to refer to the //foo:BUILD target. Use //foo:BUILD (preferred)
    or foo/BUILD instead. This does not affect BUILD/bzl files, where
    that syntax already didn't work.
  - This removes `--objc_header_scanner_tool`. The flag was primarily
    used internally, and to our knowledge, a compatible tool was
    never released. Therefore this flag is believed to be unused.

New features:

  - select() directly supports constraint_value (no need for an
    intermediate config_setting).

Important changes:

  - Non-android targets can again be built when
    android_sdk_repository is present but invalid.
  - Add a build variable for -install_name / -soname.
  - Add a build variable for -install_name / -soname.
  - Include "resources" attr in dependency attributes for java_*
    coverage configuration.
  - --trim_test_configuration should work for almost all cases when a
    non-test target depends on a test.
  - Javac now supports multiplex workers.
  - Javac now supports multiplex workers.
  - Blaze now allows symbolic links that point to their own ancestor
    unless they are traversed recursively by e.g. a //... recursive
    target pattern or a recursive glob.
  - Blaze now allows symbolic links that point to their own ancestor
    unless they are traversed recursively by e.g. a //... recursive
    target pattern or a recursive glob.
  - Blaze now allows symbolic links that point to their own ancestor
    unless they are traversed recursively by e.g. a //... recursive
    target pattern or a recursive glob.
  - Generated Go protobufs no longer depend on //net/proto2/go:proto

This release contains contributions from many people at Google, as well as Benjamin Peterson, Cristian Hancila, Ed Schouten, Fredrik Medley, Greg Estren, jgehw, Jin, Kalle Johansson, Keith Smiley, Kseniia Vasilchuk, Michael Eisel, Michael Hackner, Michael Krasnyk, Mostyn Bramley-Moore, Ruixin Bao, Samuel Giddins, Simon Stewart, Torgil Svensson, Ulf Adams, Vasilios Pantazopoulos, Wenyu Zhang, Yannic Bonenberger, yoav-steinberg.

Release 3.6.0 (2020-10-06)

Baseline: aa0d97c

Cherry picks:

   + 32c88da:
     Patch RuleContext for android_binary.deps to restore legacy
     behavior.
   + db9fc88:
     android_test also needs the legacy behavior in
     RuleContext.getPrerequisites.
   + 144d514:
     Update android_sdk_repository to create a valid, but useless,
     repository
   + bb11f92:
     Patch upb to fix build error with gcc 10
   + 9f06be4:
     Patch upb to fix build error with gcc 10 (third_party)
   + b67b75e:
     Fix issue where libtool_check_unique isn't found for sandbox
     builds

Incompatible changes:

  - `--experimental_ui_limit_console_output` is removed. Users of
    `--experimental_ui_limit_console_output=1` for silencing terminal
    output should use `--ui_event_filters=` instead.
  - --proto:instantiation_stack must be enabled in addition to
    --record_rule_instantiation_callstack to see call stack in proto
    output from blaze query.

New features:

  - cc_common.compile support for include_prefix/strip_include_prefix
  - Multiplexed persistent workers: Use
    --experimental_worker_max_multiplex_instances to configure the
    number of WorkRequests that are sent concurrently to one worker
    process. The --worker_max_instances flag will no longer be used
    to determine max instances for multiplex workers, since the two
    have different resource requirements. Multiplex workers will by
    default have a max instances of 8.

Important changes:

  - The prelude file (//tools/build_rules:prelude_bazel) is now
    processed as a Starlark module, rather than being sourced into
    the BUILD file textually. This may cause slight breakages
    depending on the content of the prelude file. (Use of the prelude
    file is discouraged as it will be removed in the long term.)
  - Removed --experimental_ignore_deprecated_instrumentation_spec and
    cleaned up the old deprecated behavior.
  - Added CODEBASE.md, a description of the Bazel codebase.
  - Removed the flag --experimental_transparent_compression.
  - Removed the flag --experimental_action_args.
  - Stop needlessly parsing WORKSPACE files from external
    repositories.
  - Dot ('.') is now allowed in workspace names. See
    bazelbuild#11837.
  - This change can cause memory and performance regressions for some
    builds with C++ dependencies, due to extra actions being executed.
    RELNOTES: None
  - Building Android apps for legacy multi-dex (pre-L) now require a
    main-dex list if the application does not fit into a single DEX
    file.
  - Puts the experimental_worker_multiplex flag to use.
  - In Starlark, the Args object supports a new parameter file format
    'flag_per_line', compatible with the Abseil flags library.
  - The flag --incompatible_no_support_tools_in_action_inputs is
    removed.
  - Support for NDK 21 added
  - Bazel will now skip printing action stdout/stderr contents if
    they exceed --experimental_ui_max_stdouterr_memory_bytes.
  - The Starlark interpreter now correctly emits an error
     if the operand of the first loop in a list comprehension
     refers to a variable bound by a later loop, such as y in
     this example:
       [e1 for x in f(y) in e2 for y in e3] # error: undefined y
                      ^
     This may cause latent dynamic errors to become static errors.
  - Added support for a 'supports-graceful-termination' execution
    requirement and tag, which causes Bazel to send a SIGTERM to any
    tagged
    actions before sending a delayed SIGKILL. This is to give
    actions, and more
    specifically tests, a chance to clean up after themselves.
  - Non-android targets can again be built when
    android_sdk_repository is present but invalid.

This release contains contributions from many people at Google, as well as Benjamin Peterson, Daniel Wagner-Hall, Dave MacLachlan, David Ostrovsky, Emil Kattainen, George Gensure, Greg Estren, Keith Smiley, mai12, Mai Hussien, Michael Eisel, Per Halvor Tryggeseth, Ruixin Bao, Samuel Giddins, Steeve Morin, Thi Doan, Tom de Goede, Ulf Adams, Zhongpeng Lin.

Release 3.5.1 (2020-10-01)

Baseline: 889bc0b

Cherry picks:

   + a7a0d48:
     Make no-op starlark transition not affect the output directory.
   + b37c51c:
     Add include_prefix and strip_include_prefix to cc_common.compile
   + f6ad35f:
     Delete --experimental_transparent_compression
   + 39bc97e:
     Remove --experimental_action_args
   + b970667:
     Stop needlessly parsing WORKSPACE files from external
     repositories.
   + e574d55:
     Allow hyphen char in workspace name
   + 9993785:
     Allow dot ('.') in workspace names.
   + b3ac8f6:
     Patch upb to fix build error with gcc 10
   + 26cbf77:
     Patch upb to fix build error with gcc 10 (third_party)
   + f1f9411:
     Fix incorrect rule class digest when creating rules through
     macros.
   + 6b591a7:
     Prepare for bazel to run with shrunken r8.jar
   + 7a11752:
     Don't run DexFileMergerTest as it is not supported for all
     r8.jar's

New features:

  - cc_common.compile support for include_prefix/strip_include_prefix

Important changes:

  - Removed the flag --experimental_transparent_compression.
  - Removed the flag --experimental_action_args.
  - Stop needlessly parsing WORKSPACE files from external
    repositories.
  - Dot ('.') is now allowed in workspace names. See
    bazelbuild#11837.

This release contains contributions from many people at Google, as well as David Ostrovsky.

Release 3.5.0 (2020-09-02)

Baseline: 889bc0b

Cherry picks:

   + a7a0d48:
     Make no-op starlark transition not affect the output directory.
   + b37c51c:
     Add include_prefix and strip_include_prefix to cc_common.compile
   + f6ad35f:
     Delete --experimental_transparent_compression
   + 39bc97e:
     Remove --experimental_action_args
   + b970667:
     Stop needlessly parsing WORKSPACE files from external
     repositories.
   + e574d55:
     Allow hyphen char in workspace name
   + 9993785:
     Allow dot ('.') in workspace names.

New features:

  - cc_common.compile support for include_prefix/strip_include_prefix

Important changes:

  - Removed the flag --experimental_transparent_compression.
  - Removed the flag --experimental_action_args.
  - Stop needlessly parsing WORKSPACE files from external
    repositories.
  - Dot ('.') is now allowed in workspace names. See
    bazelbuild#11837.

This release contains contributions from many people at Google, as well as David Ostrovsky.

Release 3.4.1 (2020-07-14)

Baseline: 7404d17

Cherry picks:

   + f31f2d7:
     fixup! Gracefully handle the lack of subreaper support in Linux.
   + 3a4f221:
     Revert "Replace the remaining dependencies for Bazel Debian
     build (third_party)"
   + c55ec0f:
     Revert "Upgrade gRPC to 1.26.0"

This release contains contributions from many people at Google, as well as Ryan Beasley.

Release 3.4.0 (2020-07-13)

Baseline: 7404d17

Cherry picks:

   + a4334be:
     fixup! Gracefully handle the lack of subreaper support in Linux.

Incompatible changes:

  - This removes the short-lived --process_wrapper_extra_flags
    flag, which was introduced primarily to roll out a bug fix.
    Unfortunately,
    this made us inadvertently expose all of the process-wrapper's
    command line
    interface to the public, which should not have happened.  Given
    the corner
    case of the utility of this flag, the lack of documentation for
    it, and the
    fact that it only appeared in a single release, we are treating
    this as a
    bug instead of a backwards compatibility breakage.

New features:

  - bazel info: Allow to specify multiple keys.
  - Support code coverage with GCC 9.

Important changes:

  - Allow InstrumentedFilesInfo fields to be read from Starlark.
  - The --starlark_cpu_profile=<file> flag writes a profile in
    pprof format containing a statistical summary of CPU usage
    by all Starlark execution during the bazel command. Use it
    to identify slow Starlark functions in loading and analysis.
  - The --debug_depset_flag has been removed as it is in effect
    always on at no cost.
  - Rule authors should use the
    incompatible_use_toolchain_transition rule attribute to migrate
    to using
    the toolchain transition. jcater to udpate notes further.
  - `apple_binary` rules now accept the `stamp` attribute with the
    same
    semantics that it has in `cc_binary` rules.
  - --incompatible_objc_provider_remove_compile_info turns off
    the compile info/mege_zip Starlark APIs in ObjcProvider.  See
    bazelbuild#11359.
  - The --debug_depset_flag has been removed as it is in effect
    always on at no cost.
  - Fix behavior of ctx.actions.write so content is written without
    an incorrect encoding to UTF-8.
    See bazelbuild#10174 for details.
  - Collect more performance metrics for worker execution.
  - Add flag --incompatible_force_strict_header_check_from_starlark
  - Configure coverage and runfiles for sh_library.
  - Adds --incompatible_blacklisted_protos_requires_proto_info to
    indicate whether proto_lang_toolchain.blacklisted_protos requires
    ProtoInfo.

This release contains contributions from many people at Google, as well as Andrzej Guszak, Benjamin Peterson, Benjamin Romano, Carlos Eduardo Seo, Claudio Bley, dannysullivan, David Ostrovsky, George Gensure, Graham Jenson, Grzegorz Lukasik, Gunnar Wagenknecht, Henk van der Laan, Jin, John Millikin, Marin Baron, Nikhil Marathe, Robin Nabel, Ryan Beasley, Samuel Giddins, Sergey Balabanov, utsav-dbx, Vo Van Nghia, Yannic Bonenberger.

Release 3.3.1 (2020-06-30)

Baseline: c063b5c

Cherry picks:

   + cb798a4:
     Restore missing Building with Platforms docs.
   + 9be9767:
     Release 3.3.0 (2020-06-17)
   + 3b0439e:
     Fix incorrect assumption of desugar persistent worker conditional

This release contains contributions from many people at Google, as well as .

Release 3.3.0 (2020-06-17)

Baseline: c063b5c

Cherry picks:

   + 23bd69d:
     Restore missing Building with Platforms docs.

Incompatible changes:

  - The startup option --fatal_event_bus_exceptions is now a no-op
    and will be removed soon.

New features:

  - Bazel offers basic completion for the fish shell.

Important changes:

  - Add configuration_field for --custom_malloc to cpp config fragment
  - Flip --incompatible_objc_compile_info_migration to true.  See
    bazelbuild#10854.
  - It is now possible to use different action mnemonics while still
    sharing the same pool of persistent workers. It requires setting
    a new property
    on the execution requirements (`worker-key-mnemonic`). The value
    overrides
    the action's mnemonic when it comes to reusing worker processes.
  - linkshared=1 in cc_binary no longer requires '.so' or '.dll' in
    the target name
  - Revert --incompatible_objc_compile_info_migration to false.  See
    bazelbuild#10854.
  - Invoke clang with the correct -target flag when building for
    watchOS.
  - NA
  - Add experiment flag to forward InstrumentedFilesInfo from
    non-tool deps by default.

This release contains contributions from many people at Google, as well as Abhishek Kumar, Adam Azarchs, Akira Baruah, Daniel Wagner-Hall, Derek Argueta, glukasiknuro, Greg Estren, Greg, Jason Furmanek, Jiri Dank, Keith Smiley, Kseniia Vasilchuk, Laurent Le Brun, Matt Mackay, Michael Klemm, Nikolay Shelukhin, Patrick Balestra, Rui Chen, Siggi Simonarson, sventiffe, Tobias Werth, Tom de Goede, Vladimir Chebotarev, Yannic Bonenberger.

Release 3.2.0 (2020-05-27)

Baseline: 1d93d26

Important changes:

  - Renamed --experimental_slim_json_profile to --slim_profile.
  - Expose ctx.attr.write Args content for analysistest when possible
  - Added aquery_differ_v2 that works with the new aquery proto
    output format.
  - Add new flag, 'experimental_no_product_name_out_symlink', to omit
    creating '<product>-out' symlink if user specifies
    '--symlink_prefix' option.
  - --ram_utilization_factor is removed (as is
    --incompatible_remove_ram_utilization_factor). Please use
    --local_ram_resources.
  - Improve include scanner support for cl.exe and clang-cl command
    lines
  - ctx.split_attr now includes attributes with Starlark split
    transitions.
  - Added --incompatible_string_replace_count, to make
    string.replace() behave as in Python.
  - Bazel can now recursively delete non-executable but readable
    directories.
  - Restore case-sensitivity to -I and /I include scanning detection
    to avoid conflicts.

This release contains contributions from many people at Google, as well as Alessandro Patti, Antoine Eiche, Beebs, Brian Silverman, George Gensure, Gerhard Pretorius, Gibson Fahnestock, Greg, Gregor Jasny, Gustav Westling, hannometer, Jin, Jonathan Gerrish, Josh Smith, Justin Y Wei, Laurent Le Brun, Links, liubang, Lszl Csomor, Matt Mackay, Moritz Krger, Ryan Beasley, Siddhartha Bagaria, Yannic Bonenberger, Yannic, Zhongpeng Lin.

Release 3.1.0 (2020-04-21)

Baseline: 17ebbf1

Cherry picks:

   + 71fb56b:
     Suppress last-ditch download exceptions w/cleanup
   + fd60614:
     In repo rules, don't warn about generator_* attributes being
     non-canonical
   + 2a37279:
     Refactor configureFeatures and prevent NPE
   + 777a6ee:
     Automated rollback of commit
     0bbe381.
   + 2ee53c9:
     Guard parseActionResultMetadata with bulk wrapper

Incompatible changes:

  - The deprecated startup options
    --experimental_oom_more_eagerly(_threshold) are removed.

Important changes:

  - Remove flag
    --incompatible_load_proto_toolchain_for_javalite_from_com_google_p
    rotobuf which has been flipped in Bazel 3.0.
  - Allow assembly file sources in cc_common.compile.
  - Set default .netrc file on Windows to %USERPROFILE%
  - A maximum 150 attributes per RuleClass is enforced
  - Increase max targets per rule class limit to 200
  - ctx.split_attr now includes attributes with Starlark split
    transitions.
  - The --max_computation_steps flag bounds the computation done by a
    BUILD file.
  - Native patch can handle file permission properly
  - Aspects may now propagate through dependencies on rule outputs by
    being defined with `apply_to_generating_rules = True`.
  - 'query --output=build' now shows where rule classes (not just
    rules) are created.
  - The flag `incompatible_bzl_disallow_load_after_statement` is
    removed.
  - ctx.split_attr now includes attributes with Starlark split
    transitions.
  - The flag `incompatible_no_output_attr_default` is removed.
  - Fix wall-time of the SpawnResult in WorkerSpawnRunner
  - Add stamp parameter for cc_common.link to enable including build
    info
  - The flag `--incompatible_restrict_named_params` is removed.
  - The flag `--incompatible_depset_union` is removed.
  - Bazel uses fewer compiler flags by default when building
    Objective-C. In
    particular, Bazel no longer sets `-O0`, `-DDEBUG=1`,
    `-fstack-protector`, `-fstack-protector-all`, or `-g` in dbg
    mode, and
    Bazel no longer sets `-Os`, `-DNDEBUG=1`, `-Wno-unused-variable`,
    `-Winit-self`, or `-Wno-extra` in opt mode. If you want to apply
    these
    flags to your project, you can reenable them in your CROSSTOOL.
  - A maximum attribute name length is 128 is enforced

This release contains contributions from many people at Google, as well as Alessandro Patti, Benjamin Peterson, Benjamin Romano, Bor Kae Hwang, Chris Heisterkamp, Cristian Hancila, Dmitri G, Douglas Parker, George Gensure, Gregor Jasny, John Millikin, Keith Smiley, Leo, Mike Fourie, Patrick Balestra, Robbert Van Ginkel, Ryota, Samuel Giddins, Ulf Adams, Ulf Adams, Vertexwahn, Xavier Bonaventura, Yannic Bonenberger.