Linting by oharboe · Pull Request #9734 · The-OpenROAD-Project/OpenROAD

oharboe · 2026-03-12T00:15:28Z

Bazel lint and tidy targets for TCL

Summary

Add Bazel-managed tclint and tclfmt via py_console_script_binary — no manual pip installs
Umbrella targets: bazelisk test //:lint_test (all checks) and bazelisk run //:lint (auto-fix)
Runs in ~0.3s, no C++ build required
Designed for extension with additional linters (clang-tidy, clang-format, ruff, buildifier, shellcheck)

Motivation

The GitHub Actions workflow .github/workflows/github-actions-lint-tcl.yml runs tclint and
tclfmt checks by creating a virtualenv and pip install tclint==0.7.0 on every CI run. This
is brittle: the version is pinned in a YAML file that can drift, developers can't easily run
the same checks locally without replicating the CI environment, and there's no way to test the
linting setup itself.

By moving to Bazel, tool versions are pinned in bazel/requirements.in with a lock file for
reproducibility, Bazel manages the Python toolchain and all transitive dependencies hermetically,
and developers get a single command that works identically on every machine.

What changed

Commit	Scope
`pip: add tclint dependency`	`tclint==0.7.0` in `bazel/requirements.in`, regenerated lock file
`bazel: add tclint/tclfmt console script binaries`	`py_console_script_binary` targets in `bazel/BUILD`, wrapper shell scripts
`bazel: add lint_test and lint umbrella targets`	`sh_test`, `sh_binary`, `test_suite` in root `BUILD.bazel`
`docs: add lint targets documentation`	`docs/contrib/LintTargets.md`

Usage

# Run all lint checks (~0.3s)
bazelisk test //:lint_test

# Run individual checks
bazelisk test //:tcl_lint_test    # tclint rules
bazelisk test //:tcl_fmt_test     # tclfmt formatting check

# Auto-fix formatting
bazelisk run //:lint              # umbrella fix-all
bazelisk run //:tcl_tidy          # tcl-specific formatting

Design decisions

py_console_script_binary: Idiomatic rules_python way to expose pip console scripts as
Bazel targets — Bazel manages the full dependency tree hermetically
tags = ["local"]: Lint checks need access to the full source tree spanning Bazel
subpackages — local tag bypasses sandbox
Umbrella targets: //:lint_test is a test_suite, //:lint is an sh_binary — both
designed to grow as more linters are added (C++, Python, Bazel files, shell scripts)
Wrapper scripts take tool path as $1: The $(rootpath //bazel:tclint) arg lets Bazel
resolve the tool binary; scripts resolve it before cd to workspace root

Backwards compatibility

GitHub Actions workflow is unchanged — it continues to run independently
No existing Bazel targets are modified
All new targets are additive

Planned additions to `//:lint_test` and `//:lint`

C++ clang-tidy and clang-format
Python ruff (lint + format)
Buildifier (BUILD/bzl file lint + format)
ShellCheck (bash script lint)
Duplicate message ID check (replace Jenkins stage)
Doc consistency checks (replace Jenkins stage)

Test plan

bazelisk test //:lint_test — 2/2 pass (tcl_lint_test, tcl_fmt_test)
bazelisk run //:lint — auto-formats successfully
bazelisk run //:tcl_tidy — auto-formats successfully
No C++ build triggered
GitHub Actions TCL lint workflow continues to pass (no changes)

gemini-code-assist

Code Review

This pull request introduces a robust, Bazel-managed framework for TCL linting and formatting, which is a great improvement for developer experience and CI consistency. The use of py_console_script_binary to manage tool dependencies is excellent. The new umbrella targets //:lint_test and //:lint are well-designed for future extension. My feedback includes a couple of minor suggestions to improve maintainability and robustness.

github-actions · 2026-03-12T00:19:32Z

clang-tidy review says "All clean, LGTM! 👍"

oharboe · 2026-03-12T05:50:00Z

@hzeller Thoughs?

maliberty · 2026-03-12T14:23:22Z

I'll wait for @hzeller 's thoughts

hzeller · 2026-03-12T14:41:27Z

This is now starting to use pip with OpenROAD, which is kindof side-stepping what bazel is doing (managing dependencies itself). It makes it harder to use, as this won't run on a hardened system anymore that prevents side-loading. So, I am not a fan.

So like clang-tidy and clang-format I suggest these to do just in separate scripts in etc/ for now.

oharboe · 2026-03-12T16:18:34Z

This is now starting to use pip with OpenROAD, which is kindof side-stepping what bazel is doing (managing dependencies itself). It makes it harder to use, as this won't run on a hardened system anymore that prevents side-loading. So, I am not a fan.

So like clang-tidy and clang-format I suggest these to do just in separate scripts in etc/ for now.

I find dependencies for all the CI rules to be a pain to manage, I much rather that the OpenROAD project takes responsibility for this and provides bazelisk run XXX to do whatever needs doing and bazel tests that I can run locally to check whatever needs checking without me having to worry about tools: fast local workflows for AI and hoomans.

github-actions · 2026-03-12T16:20:31Z

clang-tidy review says "All clean, LGTM! 👍"

Add tclint==0.7.0 to pip requirements for Bazel-managed TCL linting and formatting. This is the same version used by the GitHub Actions workflow. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Expose tclint and tclfmt as py_console_script_binary targets from the pip-managed tclint package. Add wrapper shell scripts that invoke these tools against the workspace root. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Add Bazel targets for TCL linting and formatting: - //:tcl_lint_test — runs tclint (lint rules) - //:tcl_fmt_test — runs tclfmt --check (formatting) - //:tcl_tidy — runs tclfmt --in-place (auto-format) - //:lint_test — umbrella test_suite for all lint checks - //:lint — umbrella auto-fix target Designed for extension with additional linters (C++ tidy, etc). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Document the new Bazel lint targets, usage, configuration, how to add new linters, and planned additions (clang-tidy, clang-format, ruff, buildifier, shellcheck, doc checks, duplicate ID checks). Explain why Bazel is the right tool for managing linter dependencies: hermetic, version-pinned, reproducible across dev machines and CI. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

- Rename //:lint to //:fix_lint to clarify it modifies files (gadfort) - Replace duplicated sh_binary with alias(actual = ":tcl_tidy") (gemini) - Add BUILD_WORKSPACE_DIRECTORY fallback in tcl_tidy.sh (gemini) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Rename tcl_lint_test → lint_tcl_test, tcl_fmt_test → fmt_tcl_test, tcl_tidy → tidy_tcl for consistent verb-first naming with _test suffix per Bazel convention. Update docs to match. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

github-actions · 2026-03-13T14:36:37Z

clang-tidy review says "All clean, LGTM! 👍"

maliberty · 2026-03-17T18:46:52Z

This doesn't work for me:

bazelisk run //:tidy_tcl
AssertionError: Cannot find .runfiles directory for /workspace/bazel/output/execroot/_main/bazel-out/k8-opt/bin/bazel/tclfmt
...

oharboe · 2026-03-17T19:07:20Z

This doesn't work for me:

bazelisk run //:tidy_tcl
AssertionError: Cannot find .runfiles directory for /workspace/bazel/output/execroot/_main/bazel-out/k8-opt/bin/bazel/tclfmt
...

fixed

- Tests were scanning 0 files because BUILD_WORKSPACE_DIRECTORY is unset in test context. Resolve workspace from tclint.toml symlink. - fix_lint failed because readlink -f resolved through runfiles symlinks. Use directory-based path resolution instead. - All three scripts now use git ls-files to avoid broken symlinks in gitignored directories like tmp/. - Add tmp/ to tclint.toml excludes, fix leading whitespace. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

github-actions · 2026-03-17T19:18:16Z

clang-tidy review says "All clean, LGTM! 👍"

maliberty

nit

maliberty · 2026-03-18T22:39:26Z

+Current settings:
+- **Excluded**: `src/sta/`
+- **Ignored rules**: `unbraced-expr`
+- **Style**: 2-space indent, 100-char line length, spaces in braces


no need to repeat what the file already shows - DRY (Excluded is already stale)

The settings are already visible in tclint.toml itself (DRY), and the listed exclusions were already stale. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

github-actions · 2026-03-18T23:03:22Z

clang-tidy review says "All clean, LGTM! 👍"

oharboe · 2026-03-19T20:21:07Z

@vvbandeira @maliberty pr-merge CI outage I think, timeout. 😿

maliberty · 2026-03-19T22:55:32Z

We had a gcp / jenkins issue today that when resolved left a huge queue of jobs. Various failures today due to overload. Restarted

gemini-code-assist Bot reviewed Mar 12, 2026

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Comment thread BUILD.bazel Outdated

Comment thread bazel/tcl_tidy.sh Outdated

oharboe requested a review from maliberty March 12, 2026 13:31

gadfort reviewed Mar 12, 2026

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Comment thread BUILD.bazel Outdated

oharboe and others added 7 commits March 13, 2026 15:32

pip: add tclint dependency

8a41365

Add tclint==0.7.0 to pip requirements for Bazel-managed TCL linting and formatting. This is the same version used by the GitHub Actions workflow. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Merge remote-tracking branch 'origin/master' into HEAD

ba764a2

oharboe force-pushed the linting branch from eb7f312 to ba764a2 Compare March 13, 2026 14:33

oharboe mentioned this pull request Mar 16, 2026

Add -bazel and -bazel-dev options to DependencyInstaller and Build scripts #9762

Merged

oharboe requested a review from gadfort March 17, 2026 19:06

maliberty requested changes Mar 18, 2026

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docs: remove redundant tclint settings from docs

f9a68f5

The settings are already visible in tclint.toml itself (DRY), and the listed exclusions were already stale. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

oharboe requested a review from maliberty March 18, 2026 23:00

maliberty approved these changes Mar 19, 2026

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maliberty enabled auto-merge March 19, 2026 15:26

maliberty merged commit 2da3e5b into The-OpenROAD-Project:master Mar 20, 2026
15 checks passed

oharboe mentioned this pull request Mar 23, 2026

Bazel: Add unified hermetic:tidy target for workspace formatting #9811

Merged

oharboe deleted the linting branch March 31, 2026 21:41

Conversation

oharboe commented Mar 12, 2026

Bazel lint and tidy targets for TCL

Summary

Motivation

What changed

Usage

Design decisions

Backwards compatibility

Planned additions to //:lint_test and //:lint

Test plan

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Planned additions to `//:lint_test` and `//:lint`