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Linter for .apib blueprint docs, can be run as a pre-commit hook
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Linter for .apib blueprint docs, can be run as a pre-commit hook.



apiblint is a node.js script. It was built against node v12, therefore may not work on older versions.

It is intended to be used as a pre-commit hook. So first step is to install the pre-commit tool.

pre-commit uses nodenv to manage node.js versions, so second step is to install that tool. If you are on macOS the easiest way is brew install nodenv.

If you already had nodenv installed you should brew upgrade nodenv to ensure you have the most recent versions of node available to install (pre-commit will install the requested version for you, as long as nodenv has it available).


pre-commit asks you to add a .pre-commit-config.yaml file in the root of the project where you want the hook to run.

An example config for apiblint is below:

  - repo:
    rev: 0.1.0
    - id: apiblint
        - --force-color

(due to the way hooks are run, without --force-color we will be unable to correctly determine if colors are supported in your terminal, so although colored output is the default we need this arg to actually get it... colored output is nice, use this arg)

Stand-alone installation

You're on your own for now; set up a node 12 environment with nodenv, download the source from GitHub and npm install <path/to/source dir>. The tool will be installed to your local bin path.


The pre-commit hook is configured to run apiblint on any *.apib files modified in your current commit.

You can of course run the tool stand-alone as well.


apiblint path/to/a/blueprint.apib path/to/another/blueprint.apib

You will either see OK with exit code 0, or you will have a non-zero exit code and output like:

1 linting issues found
To ignore any of these instances, copy and paste the blue
<code>:<startLine>:<endLine> error position specifier
into an ignore file at: path/to/a/blueprint.apib.apiblint

no value(s) specified
 671| ## Variant
*672| - id: (number) - canonical id (in conjunction with variantset id) for all languages of a particular variant
 673| - variantset_id: 234 (number) - localised id of parent VariantSet, based on Accept-Language header
 674| + variantset_id_l10n

We can see here the file had 1 linting issue. The text of the warning is no value(s) specified and below are highlighted the relevant line(s) from the source code.

Generally at this point you should fix the issue identified, git add your changes and try to commit again.

In some rare cases there are warnings which we want to ignore; some idioms are not well supported by blueprint syntax and the 'invalid' docs may convey useful information and still render fine in Apairy, for example.

Unfortunately API Blueprint format does not support any kind of inline comment syntax, so we have to specify our 'ignores' in a separate file. The tool expects to find this file alongside the bluprint, named as:
<blueprint file>.apiblint

From the example above, if you wanted to ignore this particular warning (you shouldn't - this one is easily fixed!) you would add a line:

W6:672:672 a file path/to/a/blueprint.apib.apiblint.

This tells apiblint to ignore warning code W6 spanning lines 672 to 672.

The drawback of having a separate ignore file is the line numbers will often have to be updated when you change the document content. apiblint will help you here if you have it as a pre-commit hook, since you won't be able to commit the change until you update the ignore file.

To ease this a little bit, by default apiblint does a 'fuzzy match' on the line number, to within ± a small range (default 5 lines). You can configure this via the --fuzzy-line-range arg.


To run the test suite: npm test from within the project source root.

The test framework is Mocha. Mocha seems to be built against an older version of JS and requires the .babelrc config file with some plugins for it to work with this project. I guess this is normal JS stuff.

CI is currently CircleCI, see .circleci/config.yml.


pre-commit installs the tool directly from GitHub and needs a tag as a target. So, for now, making a release is just pushing a git tag. The package.json file also has a version number which would be used if we were to push the tool to npm.

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