#21065 [Call-by-name] Backend migration tracking list Issue created by sureshjoshi This is a tracking list for the migrated backends. The strategy at the moment is to roll out through the experimental backends, and also some of the more heavily used backends to get more visibility in case there are problems. I'd recommend that for the "more visible" backends, we start with linters/formatters - as those are probably the most hit goals typically. ## How can I migrate a backend? # Ensure the backend is enabled in pants.toml # backend_packages = [ # ... # "pants.backend.WHATEVER", # ... # ] pants migrate-call-by-name src/python/pants/backend/WHATEVER:: # Manually check for unnecessarily `implicitly`s and replace pants fix fmt lint check test src/python/pants/backend/WHATEVER:: ### Unnecessary `implicitly`s As it's a lot more work to have the migration code dig into each method call and determine whether there are un-passed parameters, the migration liberally adds

**implicitly()

to let the rule engine figure out missing parameters, where possible. However, that's not free (and it's also visual clutter). So, during migration, reviewing each migrated function and checking whether all required parameters are passed would be nice. It would be nice to have a type check or lint rule, and/or fix this at the migration level - but that would take some time. Here is a concrete example of this in action: 23cdef5 -

implicitly

wasn't required. ## I don't understand any of this Yeah... Docs coming soon... Right now, the information is scattered around a number of discussions, issues, and PRs. Fundamentally,

my_foo = await Get(Foo, FooRequest, value)

becomes

my_foo = await some_function(value)

or

my_foo = await some_function(value, **implicitly())

- like normal function calling. --- List generated by

pants help-advanced backends

/

MODE=debug pants help-all | jq -r '(.name_to_backend_help_info | keys_unsorted)[]' | sort

• pants.backend.awslambda.python • pants.backend.build_files.fix.deprecations • pants.backend.build_files.fmt.black • pants.backend.build_files.fmt.buildifier • pants.backend.build_files.fmt.ruff • pants.backend.build_files.fmt.yapf • pants.backend.codegen.protobuf.lint.buf • pants.backend.codegen.protobuf.python • pants.backend.codegen.thrift.apache.python • pants.backend.docker • pants.backend.docker.lint.hadolint • pants.backend.experimental.adhoc • pants.backend.experimental.bsp • pants.backend.experimental.cc • pants.backend.experimental.cc.lint.clangformat • pants.backend.experimental.codegen.avro.java • pants.backend.experimental.codegen.protobuf.go • pants.backend.experimental.codegen.protobuf.java • pants.backend.experimental.codegen.protobuf.scala • pants.backend.experimental.codegen.python_format_string • pants.backend.experimental.codegen.python_format_string.k8s • pants.backend.experimental.codegen.thrift.apache.java • pants.backend.experimental.codegen.thrift.scrooge.java • pants.backend.experimental.codegen.thrift.scrooge.scala • pants.backend.experimental.cue • pants.backend.experimental.debian • pants.backend.experimental.docker.lint.trivy • pants.backend.experimental.docker.podman • pants.backend.experimental.go • pants.backend.experimental.go.debug_goals • pants.backend.experimental.go.lint.golangci_lint • pants.backend.experimental.go.lint.vet • pants.backend.experimental.helm • pants.backend.experimental.helm.check.kubeconform • pants.backend.experimental.helm.lint.trivy • pants.backend.experimental.java • pants.backend.experimental.java.bsp • pants.backend.experimental.java.debug_goals • pants.backend.experimental.java.lint.google_java_format • pants.backend.experimental.javascript • pants.backend.experimental.javascript.lint.prettier • pants.backend.experimental.k8s • pants.backend.experimental.kotlin • pants.backend.experimental.kotlin.debug_goals • pants.backend.experimental.kotlin.lint.ktlint • pants.backend.experimental.makeself • pants.backend.experimental.nfpm • pants.backend.experimental.openapi • pants.backend.experimental.openapi.codegen.java • pants.backend.experimental.openapi.codegen.python • pants.backend.experimental.openapi.lint.openapi_format • pants.backend.experimental.openapi.lint.spectral • pants.backend.experimental.python • pants.backend.experimental.python.framework.django • pants.backend.experimental.python.framework.stevedore • pants.backend.experimental.python.lint.add_trailing_comma • pants.backend.experimental.python.lint.autoflake • pants.backend.experimental.python.lint.pyupgrade • pants.backend.experimental.python.lint.ruff.check • pants.backend.experimental.python.lint.ruff.format • pants.backend.experimental.python.packaging.pyoxidizer • pants.backend.experimental.python.typecheck.pyright • pants.backend.experimental.python.typecheck.pytype • pants.backend.experimental.rust • pants.backend.experimental.scala • pants.backend.experimental.scala.bsp • pants.backend.experimental.scala.debug_goals • pants.backend.experimental.scala.lint.scalafix • pants.backend.experimental.scala.lint.scalafmt • pants.backend.experimental.sql • pants.backend.experimental.sql.lint.sqlfluff • pants.backend.experimental.swift • pants.backend.experimental.terraform • pants.backend.experimental.terraform.lint.tfsec • pants.backend.experimental.terraform.lint.trivy • pants.backend.experimental.tools.semgrep • pants.backend.experimental.tools.trufflehog • pants.backend.experimental.tools.workunit_logger • pants.backend.experimental.tools.yamllint • pants.backend.experimental.typescript • pants.backend.experimental.visibility • pants.backend.google_cloud_function.python • pants.backend.plugin_development • pants.backend.project_info • pants.backend.python • pants.backend.python.lint.autoflake • pants.backend.python.lint.bandit • pants.backend.python.lint.black • pants.backend.python.lint.docformatter • pants.backend.python.lint.flake8 • pants.backend.python.lint.isort • pants.backend.python.lint.pydocstyle • pants.backend.python.lint.pylint • pants.backend.python.lint.pyupgrade • pants.backend.python.lint.yapf • pants.backend.python.mixed_interpreter_constraints • pants.backend.python.providers.experimental.pyenv • pants.backend.python.providers.experimental.pyenv.custom_install • pants.backend.python.providers.experimental.python_build_standalone • pants.backend.python.typecheck.mypy • pants.backend.shell • pants.backend.shell.lint.shellcheck • pants.backend.shell.lint.shfmt • pants.backend.tools.preamble • pants.backend.tools.taplo • pants.backend.url_handlers.s3 • pants.core pantsbuild/pants