A pre-commit hook for validating files against jsonschemas.
Project description
check-jsonschema
A pre-commit hook for checking files against a JSONSchema, built using the python jsonschema package. The schema may be specified as a local or remote (HTTP or HTTPS) file.
Remote files are automatically downloaded and cached if possible.
Supported Hooks
The most generic hook is this one:
- check-jsonschema: Validate JSON or YAML files against a jsonschema on disk or fetched via HTTP(S)
These hooks check known files against schemas provided by Schemastore:
-
check-github-workflows: Validate GitHub Workflows in
.github/workflows/ -
check-github-actions: Validate GitHub Actions in
.github/actions/or theaction.ymlat the repo root -
check-travis: Validate Travis config
These hooks check known files against schemas provided by other sources:
-
check-azure-pipelines: Validate Azure Pipelines config against the schema provided by Microsoft
-
check-readthedocs: Validate ReadTheDocs yaml config against the schema provided by ReadTheDocs
-
check-renovate: Validate RenovateBot config against the schema provided by Renovate (does not support config in package.json)
Example Usage
Validate GitHub Workflows with Schemastore
You can use the schemastore github workflow schema to lint your GitHub workflow
files. All you need to add to your .pre-commit-config.yaml is this:
- repo: https://github.com/sirosen/check-jsonschema
rev: 0.8.2
hooks:
- id: check-github-workflows
Applying an arbitrary schema to files
There is a more general hook available for running any jsonschema against a file or set of files. For example, to implement the GitHub workflow check manually, you could do this:
- repo: https://github.com/sirosen/check-jsonschema
rev: 0.8.2
hooks:
- id: check-jsonschema
name: "Check GitHub Workflows"
files: ^\.github/workflows/
types: [yaml]
args: ["--schemafile", "https://json.schemastore.org/github-workflow"]
And to check with the builtin schema that a GitHub workflow sets
timeout-minutes on all jobs:
- repo: https://github.com/sirosen/check-jsonschema
rev: 0.8.2
hooks:
- id: check-jsonschema
name: "Check GitHub Workflows set timeout-minutes"
files: ^\.github/workflows/
types: [yaml]
args: ["--builtin-schema", "github-workflows-require-timeout"]
Standalone Usage
You can also pip install check-jsonschema to run the tool manually.
For full usage info:
check-jsonschema --help
CLI Options
These options apply both to standalone usage and pre-commit hook usage.
--schemafile
The path or URL for a file containing a schema to use.
This option is required unless --builtin-schema is used.
--no-cache
Do not cache HTTP(S) downloaded schemas.
--disable-format
JSON Schema defines a "format" attribute for string fields but does not require
that any validation for formats be applied.
Starting in version 0.6.0, check-jsonschema will automatically check some
formats by default.
This flag disables these checks.
Because "format" checking is not done by all JSON Schema tools, it is
possible that a file may validate under a schema with a different tool, but
fail with check-jsonschema if --disable-format is not set.
--format-regex
Set a mode for handling of the "regex" value for "format". The modes are as
follows:
| mode | description |
|---|---|
| disabled | Skip checking regex, but leave other formats enabled. |
| default | Check for known non-python regex syntaxes. If one is found, the expression always passes. Otherwise, check validity in the python engine. |
| python | Require the regex to be valid in python regex syntax. |
--cache-filename
The name to use for caching a remote (HTTP or HTTPS) schema.
Defaults to using the last slash-delimited part of the URI.
--default-filetype
The default filetype to assume on instance files when they are detected neither as JSON nor as YAML.
For example, pass --default-filetype yaml to instruct that files which have
no extension should be treated as YAML.
By default, this is not set and files without a detected type of JSON or YAML will fail.
--builtin-schema
The name of a builtin schema from check-jsonschema to use.
Use of this option replaces --schemafile, and the two are mutually exclusive.
The following values are valid and refer to vendored copies of schemastore schemas:
vendor.azure-pipelinesvendor.github-actionsvendor.github-workflowsvendor.travisvendor.readthedocsvendor.renovate
The following values are valid and refer to custom schemas:
github-workflows-require-timeout-- This schema checks that a GitHub workflow explicitly setstimeout-minuteson all jobs. (The default value for this is 6 hours.)
--failover-builtin-schema
Specify one of the vendor schemas which should be used if fetching
--schemafile fails.
For example, to download the latest travis schema, but failover to the
vendored copy, use
check-jsonschema --schemafile "https://json.schemastore.org/travis" --failover-builtin-schema vendor.travis
This is what is used by the hooks provided by check-jsonschema.
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