pre-submit: Populate blocked_terms.txt

This patch populates the global list of blocked words. The list of
unblocked words are symlinked from the block list. Thus, nothing
will be blocked globally.

unblocked_terms.txt in this directry is referenced only if it
doesn't exist in the project directory. It's expected to be copied
to each project when a project is starting COIL. It will also serve
as a TODO list to locally track the progress.

See for how to use unblocked_terms.txt for your project.

TEST=Run repo upload --cbr --dry-run .
  [COMMIT 1/1 7a40d010022f] test: blocked_terms.txt
  [FAILED] path/to/X: _check_keywords
  Found a blocked keyword in:
  .../main.c, line 41: Matched "dog-pile" with regex of "dog.?pile"

Change-Id: Iea03b536d24a1a1c9590aebed162c6624166a343
Tested-by: Daisuke Nojiri <>
Reviewed-by: Mike Frysinger <>
Reviewed-by: Bernie Thompson <>
Commit-Queue: Mike Frysinger <>
Auto-Submit: Daisuke Nojiri <>
5 files changed
tree: 79cad5efed9099164777fa6d1a4e0344975e36a5
  1. .gitignore
  3. PRESUBMIT.cfg
  5. blocked_terms.txt
  8. const_structs.checkpatch
  10. kernel-doc
  13. spelling.txt

Chromium OS Preupload Hooks

This repo holds hooks that get run by repo during the upload phase. They perform various checks automatically such as running linters on your code.

Note: Currently all hooks are enabled by default. Each repo must explicitly turn off any hook it wishes to disable.

Note: While we still use “presubmit” in many places (including config files), these checks only run at preupload time.


Normally these execute automatically when you run repo upload. If you want to run them by hand, you can execute directly. By default, that will scan the active repo and process all commits that haven't yet been merged. See its help for more info.


Sometimes you might want to bypass the upload checks. While this is strongly discouraged (often failures you add will affect others and block them too), sometimes there are valid reasons for this. You can simply use the option --no-verify when running repo upload to skip all upload checks. This will skip all checks and not just specific ones. It should be used only after having run & evaluated the upload output previously.

Config Files


This file is checked in the top of a specific git repository. Stacking them in subdirectories (to try and override parent settings) is not supported.


# Per-project `repo upload` hook settings.

[Hook Scripts]
cros lint = cros lint ${PRESUBMIT_FILES}
pre-upload_unittest = ./

[Hook Overrides]
cros_license_check: true
long_line_check: true
tab_check: true
stray_whitespace_check: true

[Hook Overrides Options]
cros_license_check: --exclude_regex=\b(checkpatch\.pl|kernel-doc)$


Hooks are executed in the top directory of the git repository. All paths should generally be relative to that point.

A few environment variables are set so scripts don't need to discover things.

  • PRESUBMIT_PROJECT: The project name being changed by the commit (e.g. ‘chromiumos/platform/firmware’).
  • PRESUBMIT_COMMIT: The full commit hash of your change.
  • PRESUBMIT_FILES: A list of files affected by your commit delimited by newlines.

[Hook Scripts]

This section allows for completely arbitrary hooks to run on a per-repo basis.

The key can be any name (as long as the syntax is valid), as can the program that is executed. The key is used as the name of the hook for reporting purposes, so it should be at least somewhat descriptive.

Whitespace in the key name is OK!

The keys must be unique as duplicates will silently clobber earlier values.

You do not need to send stderr to stdout. The tooling will take care of merging them together for you automatically.

[Hook Scripts]
my first hook = program --gogog ${PRESUBMIT_FILES}
another hook = funtimes --i-need "some space" ${PRESUBMIT_FILES}
some fish = linter --ate-a-cat ${PRESUBMIT_FILES}
some cat = formatter --cat-commit ${PRESUBMIT_COMMIT}

[Hook Overrides]

This section allows for turning off common/builtin hooks.

Note: Not all hooks that we run may be disabled. We only document the ones that may be controlled by the config file here, but we run many more checks.

  • aosp_license_check: Require source files have an Android (Apache) license.
  • branch_check: Require all commit messages have a BRANCH= line.
  • bug_field_check: Require all commit messages have a BUG= line.
  • checkpatch_check: Run commits through Linux's tool.
  • clang_format_check: Run source code through clang-format.
  • contribution_check: Check source files for invalid “not a contribution”.
  • cros_license_check: Require source files have a Chromium (BSD) license.
  • filepath_chartype_check: Check source files for FilePath::CharType use.
  • json_check: Check all .json files are valid JSON.
  • kerneldoc_check: Run commits through Linux's kernel-doc tool.
  • long_line_check: Do not allow lines longer than 80 cols.
  • manifest_check: Check all ebuild Manifest files.
  • project_prefix_check: Require all commit message have a subdir prefix.
  • signoff_check: Require all commit messages have a Signed-off-by tag.
  • stray_whitespace_check: Check source files for stray whitespace.
  • tabbed_indent_required_check: Require tabs for indentation.
  • tab_check: Do not allow tabs for indentation in source files.
  • test_field_check: Require all commit messages have a TEST= line.

[Hook Overrides Options]

Some hooks accept custom options. The key name matches the Hook Overrides name above, so see that list for more details.

[Hook Overrides Options]
cros_license_check: --exclude_regex=\b(checkpatch\.pl|kernel-doc)$

Blocked and Unblocked Word List

blocked_terms.txt contains a list of words which are blocked if keyword_check is enabled in the project. unblocked_terms.txt is a copy of blocked_terms.txt. So, by default nothing will be blocked.

unblocked_terms.txt in this directry is referenced only if it doesn't exist in a project directory. To transition to the default blocked word list for project X, one can do:

  1. Copy unblocked_terms.txt to X.
  2. Remove words which are not used in X. $ egrep -r -i -I '(keyword1|keyword2|...)'
  3. Test and submit CL.

Then, when blocking word ‘foo’ for project X, one can do:

  1. Remove ‘foo’ from unblocked_terms.txt in X.
  2. Grep and fix matches. $ egrep -r -i -I foo
  3. Test & submit CL.

Third Party code

We have many third party repos where you probably want to disable CrOS checks. You‘ll need to disable each one in your project’s PRESUBMIT.cfg file. See the reference above for which checks you probably want to disable.

Reporting issues

You can file bugs at with Component=Infra>ChromeOS>Build>Platform.

If you want to ask questions, use our normal development groups.