Release notes from bazel

Release 3.4.1 (2020-07-14)

2020-07-14T06:24:08Z

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)

2020-07-13T15:23:47Z

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= 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)

2020-06-30T15:05:55Z

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)

2020-06-17T12:51:49Z

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)

2020-05-27T17:50:24Z

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 '-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)

2020-04-21T15:37:50Z

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.

Release 3.0.0 (2020-04-06)

2020-04-06T12:49:40Z

Baseline: 3c7cc74

Cherry picks:

19e214b:
Use prefix encoding for paths.
63b01f7:
Avoid file operations in the sandbox creation critical path.
80a2d7c:
Implementation (but not plumbing) of the gRPC remote downloader
586eabf:
Implement RemoteDownloader w/ --experimental_remote_downloader

Incompatible changes:

Flip --incompatible_remove_enabled_toolchain_types, so that rules
can no longer access enabled toolchain types from the platform
fragment.
The --incompatible_use_jdk11_as_host_javabase flag has been
removed (it was flipped in Bazel 0.25.0).
Using JDK 9 or 10 as a --host_javabase is no longer officially
supported. As always, you can use the
@bazel_tools//tools/jdk:toolchain_vanilla Java toolchain to use
older or newer JDKs than what Bazel currently supports.
--fatal_event_bus_exceptions is deprecated and should not be
used. Any crashes should be reported so that they can be fixed.
The old-style binary profile format is no longer suppported, use
the new JSON trace profile instead.

Important changes:

Improve the performance of creating a sandboxed execution root
for workers when the number of inputs is large (>1000).
Treat .cu and .cl files as C++ source. CUDA or OpenCL are not
natively supported and will require custom flags to compile with
e.g. clang.
Add actions' primary output details in JSON profile and
analysis_v2.proto.
Add --cds_archive option for embedding CDS archive into deploy
JAR.
Add new global attribute: applicable_licenses
- Package level default with default_applicable_licenses
- guarded by --incompatible_applicable_licenses (default true for
  Blaze, false for Bazel)
- In support of
  https://docs.google.com/document/d/1uwBuhAoBNrw8tmFs-NxlssI6VRolid
  GYdYqagLqHWt8/edit#
Non-test Java rules no longer require the TestConfiguration and
thus --trim_test_configuration is again usable for Java builds
The flag --incompatible_always_check_depset_elements is enabled
by default.
--incompatible_objc_compile_info_migration determines
whether native rules can assume compile info has been migrated to
CcInfo. See bazelbuild#10854.
--incompatible_remove_local_resources is true by default. Please
use --local_ram_resources and --local_cpu_resources instead of
--local_resources.

This release contains contributions from many people at Google, as well as Alessandro Patti, Benjamin Peterson, Christy Norman, Dave hughes, David Haxton, David Neil, garyschulte, George Chiramel, George Gensure, Gibson Fahnestock, Greg Estren, Greg, Jason Hoch, Jin, John Millikin, Jonathan Springer, Keith Smiley, Laurent Le Brun, Ulf Adams, Yannic Bonenberger, Yannic, Yihong Wang, Yuchen Dai.

Release 2.2.0 (2020-03-03)

2020-03-03T09:22:29Z

Baseline: 78055ef

Incompatible changes:

The --[no]incompatible_windows_bashless_run_command flag is no
longer supported. It was flipped in Bazel 1.0
The --[no]incompatible_windows_native_test_wrapper flag is no
longer supported. It was flipped in Bazel 1.0

Important changes:

Consistent target naming style in example target names.
cquery's config() now supports arbitrary configurations.
The flag --incompatible_disallow_dict_lookup_unhashable_keys is
removed.
Include target label in Python version error message.
The flag --incompatible_remap_main_repo is removed.
Windows: we now discourage running Bazel from MSYS2 because of a
newly found bug (bazelbuild#10573)
Reduced the packaging time (package-bazel.sh) for the
//src:bazel-dev Bazel development build target from 14s to 6s.
Use //src:bazel-dev if you're iterating rapidly on a local
Bazel changes, and use //src:bazel --compilation_mode=opt for
release builds.
cquery: "//foo:bar" now means "all configured targets with label
//foo:bar" instead of "choose an arbitrary configured target with
label //foo:bar". See cquery docs for details.
WORKSPACE and BUILD.bazel files of http_archive repositories can
now be patched using the "patch_cmds" and "patches" attributes.
Actions with "parse" on the critical path should no longer finish
in the future.
Flags that affect external repositories like
"--override_repository" can now be addressed in bazelrc files
using the "common" command, without causing commands like "bazel
shutdown" to fail.
The flag --incompatible_disallow_unverified_http_downloads is
removed.
Create the incompatibleApplicableLicenses flag.
We plan to flip this from false to true in Bazel 4.x.
Implementation to follow.
Treat .cu and .cl files as C++ source. CUDA or OpenCL are not
natively supported and will require custom flags to compile with
e.g. clang.
Treat .cu and .cl files as C++ source. CUDA or OpenCL are not
natively supported and will require custom flags to compile with
e.g. clang.
The --starlark_cpu_profile= 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.
--ram_utilization_factor will be deprecated. Please use
--local_ram_resources=HOST_RAM*
Docs: glob() documentation is rewritten, and now it points out a
pitfall of rules shadowing glob-matched files.

This release contains contributions from many people at Google, as well as Alessandro Patti, Alex Kirchhoff, aman, Artur Dryomov, Benjamin Peterson, Benjamin Peterson, David Ostrovsky, Elliotte Rusty Harold, Eric Klein, George Chiramel, George Gensure, Guillaume Bouchard, Hui-Zhi, John Millikin, Jonathan Springer, Laurent Le Brun, Michael McLoughlin, nikola-sh, Nikolaus Wittenstein, Nikolay Shelukhin, Yannic Bonenberger, Yannic.

Release 2.1.1 (2020-02-21)

2020-02-21T14:51:30Z

Baseline: 41ec5a2

Cherry picks:

733ac0f:
Adds an alias for d8_jar_import in android.WORKSPACE.
c94b147:
Automatic code cleanup.
2a8cc70:
Do not fail or print errors when Shellzelisk cannot find a
requested ?
bdf34d7:
Fix race when extracting the install base when Bazel runs in a
PID namespace.
d381c25:
Fix wrong mode of install base directory.
eab39cc:
Disable broken test_max_open_file_descriptors.
e6ee35f:
Release 2.1.0 (2020-02-07)
9a823d9:
Prevent NPE on backwards seek on Chunker

9a823d9: Prevent NPE on backwards seek on Chunker.

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

Release 2.0.1 (2020-02-21)

2020-02-21T14:49:27Z

Baseline: db0e32c

Cherry picks:

85e84f7:
Set --incompatible_prohibit_aapt1 default to true.
84eae2f:
Let shellzelisk fallback to bazel-real if it's the requested
version.
d5ae460:
Fix a typo in bazel.sh
59e3600:
Release 2.0.0 (2019-12-19)
9a823d9:
Prevent NPE on backwards seek on Chunker
2a8cc70:
Do not fail or print errors when Shellzelisk cannot find a
requested ?

9a823d9: Prevent NPE on backwards seek on Chunker.
2a8cc70: Do not fail or print errors when Shellzelisk cannot find a requested Bazel binary, if tools/bazel exists.

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