migrate dirs whose runtime.python_binary kwargs are fbcode-only

[bigfootjon]

Summary:
Chunk 9 of fbcode/executorch TARGETS->BUCK migration. 4 directories that
were attempted in earlier chunks but reverted because their
runtime.python_binary calls use kwargs the xplat macro rejects
(main_src, srcs = ["data_utils.py"] triggering the
"default_only is not allowed to be specified" error, etc.).

Migrated using the chunk-6 gate-everything-on-is_fbcode pattern: each dir
now has a thin BUCK calling define_common_targets(is_fbcode = is_fbcode())
and a targets.bzl whose define_common_targets early-returns when not in
fbcode. This preserves the pre-migration behavior where these dirs were
fbcode-only by virtue of being TARGETS-only.

Directories migrated:

• devtools/inspector
• examples/devtools/scripts
• extension/pybindings/fb/test
• extension/training/examples/CIFAR

CIFAR's existing targets.bzl was edited to add is_fbcode = False param
and an early-return guard at the top of define_common_targets.

runtime/test was attempted but reverted: the dir's PACKAGE file calls
ci.buckconfig("executorch.event_tracer_enabled", "true") and that
buckconfig key is not on the xplat allowlist, so xplat fails to evaluate
the package once it has a BUCK file. Needs a separate fix to the PACKAGE
file (probably gating the ci.buckconfig call on is_fbcode) before this
dir can be migrated.

Differential Revision: D109082048

[pytorch-bot]

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❌ 2 New Failures

As of commit 32f3576 with merge base 6cd7ecd ():

NEW FAILURES - The following jobs have failed:

• Cadence Build & Test / hifi-build / hifi4 (gh)
  Refusing to check out fork pull request code from a 'pull_request_target' workflow. This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch cache scope, and runner access. Fetching and executing a fork's code in that trusted context commonly leads to "pwn request" vulnerabilities. To opt in, review the risks at https://gh.io/securely-using-pull_request_target and set 'allow-unsafe-pr-checkout: true' on the actions/checkout step.
• Cadence Build & Test / vision-build / vision (gh)
  Refusing to check out fork pull request code from a 'pull_request_target' workflow. This workflow runs with the base repository's GITHUB_TOKEN, secrets, default-branch cache scope, and runner access. Fetching and executing a fork's code in that trusted context commonly leads to "pwn request" vulnerabilities. To opt in, review the risks at https://gh.io/securely-using-pull_request_target and set 'allow-unsafe-pr-checkout: true' on the actions/checkout step.

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[meta-codesync]

@bigfootjon has exported this pull request. If you are a Meta employee, you can view the originating Diff in D109082048.

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[Copilot]

Pull request overview

Migrates several fbcode-only directories from TARGETS to BUCK while preserving prior behavior in xplat by gating target definitions on is_fbcode().

Changes:

• Added thin BUCK entrypoints that call define_common_targets(is_fbcode = is_fbcode()).
• Introduced/updated targets.bzl files that early-return when not in fbcode to avoid xplat-incompatible runtime.python_binary kwargs.
• Completed migration cleanup by removing TARGETS files and folding fbcode-only unit tests behind an is_fbcode gate.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
extension/training/examples/CIFAR/targets.bzl	Adds is_fbcode param + early-return guard to keep CIFAR fbcode-only.
extension/training/examples/CIFAR/BUCK	New BUCK entrypoint calling define_common_targets with is_fbcode().
examples/devtools/scripts/targets.bzl	New fbcode-gated targets definition (python binaries).
examples/devtools/scripts/BUCK	New BUCK entrypoint calling define_common_targets with is_fbcode().
devtools/inspector/targets.bzl	Moves inspector targets into a fbcode-gated targets.bzl.
devtools/inspector/BUCK	New BUCK entrypoint calling define_common_targets with is_fbcode().
devtools/inspector/TARGETS	Removed as part of TARGETS→BUCK migration.
devtools/etdump/tests/targets.bzl	Adds is_fbcode param and gates python unittest target creation on it.
devtools/etdump/tests/BUCK	Updates BUCK to pass is_fbcode() into define_common_targets.
devtools/etdump/tests/TARGETS	Removed as part of TARGETS→BUCK migration.

Comments suppressed due to low confidence (1)

devtools/etdump/tests/targets.bzl:9

• The docstring still claims this directory has both TARGETS and BUCK callers, but TARGETS was removed as part of this migration. Updating the docstring avoids misleading future edits.

    """Defines targets that should be shared between fbcode and xplat.

    The directory containing this targets.bzl file should also contain both
    TARGETS and BUCK files that call this function.
    """

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