s by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b <new-branch-name>

HEAD is now at 756b174d fix: Add missing method_signature annotations for BigTable Admin Backup RPCs
2020-06-20 08:03:41,028 autosynth [DEBUG] > Running: git branch -f autosynth-self-2
2020-06-20 08:03:41,033 autosynth [DEBUG] > Running: git checkout autosynth-self-2
Switched to branch 'autosynth-self-2'
2020-06-20 08:03:41,039 autosynth [INFO] > Running synthtool
2020-06-20 08:03:41,039 autosynth [INFO] > ['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']
2020-06-20 08:03:41,039 autosynth [DEBUG] > log_file_path: /tmpfs/src/github/synthtool/logs/googleapis/python-datastore/self/2/sponge_log.log
2020-06-20 08:03:41,042 autosynth [DEBUG] > Running: /tmpfs/src/github/synthtool/env/bin/python3 -m synthtool --metadata synth.metadata synth.py --
2020-06-20 08:03:41,270 synthtool [DEBUG] > Executing /home/kbuilder/.cache/synthtool/python-datastore/synth.py.
On branch autosynth-self-2
nothing to commit, working tree clean
2020-06-20 08:03:41,413 synthtool [DEBUG] > Ensuring dependencies.
2020-06-20 08:03:41,427 synthtool [DEBUG] > Using precloned repo /home/kbuilder/.cache/synthtool/synthtool
2020-06-20 08:03:41,432 synthtool [DEBUG] > Cloning googleapis.
2020-06-20 08:03:41,432 synthtool [DEBUG] > Using precloned repo /home/kbuilder/.cache/synthtool/googleapis
2020-06-20 08:03:41,437 synthtool [DEBUG] > Generating code for: //google/datastore/v1:datastore-v1-py.
2020-06-20 08:03:45,160 synthtool [ERROR] > Failed executing bazel --max_idle_secs=60 build //google/datastore/v1:datastore-v1-py:

Loading: 
Loading: 0 packages loaded
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator/archive/a59457d24bd6f3c962c8e699c708121c928eedc8.zip) = 843bcf262d44f6a2c1c131844ff8ef40daf95dd3b7c95dd761656f9e010d06d7
Loading: 0 packages loaded
DEBUG: Rule 'com_google_api_codegen' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "843bcf262d44f6a2c1c131844ff8ef40daf95dd3b7c95dd761656f9e010d06d7"
DEBUG: Call stack for the definition of repository 'com_google_api_codegen' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:62:1
INFO: SHA256 (https://github.com/googleapis/protoc-java-resource-names-plugin/archive/64dafb71ea9a385a8da89989f0b9dab925bf4610.zip) = f475903e83904dbbe3651abae8cbf57ed804960a0dadd9cbde41b746db645052
DEBUG: Rule 'com_google_protoc_java_resource_names_plugin' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "f475903e83904dbbe3651abae8cbf57ed804960a0dadd9cbde41b746db645052"
DEBUG: Call stack for the definition of repository 'com_google_protoc_java_resource_names_plugin' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:155:1
Loading: 0 packages loaded
INFO: SHA256 (https://github.com/googleapis/gapic-generator-go/archive/v0.13.3.tar.gz) = c18388bb1f1318dc5b00d9727beb9f9a079b64c2ef96a93cee83b5e11e172f02
DEBUG: Rule 'com_googleapis_gapic_generator_go' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "c18388bb1f1318dc5b00d9727beb9f9a079b64c2ef96a93cee83b5e11e172f02"
DEBUG: Call stack for the definition of repository 'com_googleapis_gapic_generator_go' which is a http_archive (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/bazel_tools/tools/build_defs/repo/http.bzl:296:16):
 - <builtin>
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:209:1
Analyzing: target //google/datastore/v1:datastore-v1-py (1 packages loaded, 0 targets configured)
INFO: Call stack for the definition of repository 'go_sdk' which is a _go_download_sdk (rule definition at /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/io_bazel_rules_go/go/private/sdk.bzl:79:20):
 - <builtin>
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/io_bazel_rules_go/go/private/sdk.bzl:92:5
 - /home/kbuilder/.cache/bazel/_bazel_kbuilder/a732f932c2cbeb7e37e1543f189a2a73/external/io_bazel_rules_go/go/private/sdk.bzl:260:13
 - /home/kbuilder/.cache/synthtool/googleapis/WORKSPACE:81:1
ERROR: While resolving toolchains for target @pypi_black//:black: invalid registered toolchain '@gapic_generator_python//:pyenv3_toolchain': no such package '@gapic_generator_python//': The repository '@gapic_generator_python' could not be resolved
ERROR: Analysis of target '//google/datastore/v1:datastore-v1-py' failed; build aborted: invalid registered toolchain '@gapic_generator_python//:pyenv3_toolchain': no such package '@gapic_generator_python//': The repository '@gapic_generator_python' could not be resolved
INFO: Elapsed time: 3.712s
INFO: 0 processes.
FAILED: Build did NOT complete successfully (21 packages loaded, 95 targets configured)
FAILED: Build did NOT complete successfully (21 packages loaded, 95 targets configured)

2020-06-20 08:03:45,161 synthtool [DEBUG] > Wrote metadata to synth.metadata.
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 102, in <module>
    main()
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/tmpfs/src/github/synthtool/env/lib/python3.6/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/__main__.py", line 94, in main
    spec.loader.exec_module(synth_module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/kbuilder/.cache/synthtool/python-datastore/synth.py", line 29, in <module>
    include_protos=True,
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 46, in py_library
    return self._generate_code(service, version, "python", **kwargs)
  File "/tmpfs/src/github/synthtool/synthtool/gcp/gapic_bazel.py", line 180, in _generate_code
    shell.run(bazel_run_args)
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 39, in run
    raise exc
  File "/tmpfs/src/github/synthtool/synthtool/shell.py", line 33, in run
    encoding="utf-8",
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 438, in run
    output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '['bazel', '--max_idle_secs=60', 'build', '//google/datastore/v1:datastore-v1-py']' returned non-zero exit status 1.
2020-06-20 08:03:45,218 autosynth [ERROR] > Synthesis failed
2020-06-20 08:03:45,218 autosynth [DEBUG] > Running: git reset --hard HEAD
HEAD is now at 83c636e feat: add synth config to generate datastore_admin_v1 (#27)
2020-06-20 08:03:45,224 autosynth [DEBUG] > Running: git checkout autosynth-self
Switched to branch 'autosynth-self'
2020-06-20 08:03:45,230 autosynth [ERROR] > Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.
2020-06-20 08:03:45,421 autosynth [INFO] > PR already exists: https://github.com/googleapis/python-datastore/pull/34
2020-06-20 08:03:45,421 autosynth [DEBUG] > Running: git clean -fdx
Removing __pycache__/
Removing google/__pycache__/
Traceback (most recent call last):
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 649, in <module>
    main()
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 506, in main
    return _inner_main(temp_dir)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 629, in _inner_main
    commit_count = synthesize_loop(x, multiple_prs, change_pusher, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 367, in synthesize_loop
    synthesize_inner_loop(fork, synthesizer)
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 411, in synthesize_inner_loop
    synthesizer, len(toolbox.versions) - 1
  File "/tmpfs/src/github/synthtool/autosynth/synth.py", line 266, in synthesize_version_in_new_branch
    synthesizer.synthesize(synth_log_path, self.environ)
  File "/tmpfs/src/github/synthtool/autosynth/synthesizer.py", line 120, in synthesize
    synth_proc.check_returncode()  # Raise an exception.
  File "/home/kbuilder/.pyenv/versions/3.6.9/lib/python3.6/subprocess.py", line 389, in check_returncode
    self.stderr)
subprocess.CalledProcessError: Command '['/tmpfs/src/github/synthtool/env/bin/python3', '-m', 'synthtool', '--metadata', 'synth.metadata', 'synth.py', '--']' returned non-zero exit status 1.