104 lines
2.3 KiB
Markdown
104 lines
2.3 KiB
Markdown
# Hacking Guide
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## Overview
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This guide contains instructions for building artifacts contained in this repository.
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### Go
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This spec includes several Go packages, and a command line tool considered to be a reference implementation of the OCI image specification.
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Prerequisites:
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* Go - current release only, earlier releases are not supported
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* make
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The following make targets are relevant for any work involving the Go packages.
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### Linting
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The included Go source code is being examined for any linting violations not included in the standard Go compiler. Linting is done using [gometalinter](https://github.com/alecthomas/gometalinter).
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Invocation:
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```
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$ make lint
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```
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### Tests
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This target executes all Go based tests.
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Invocation:
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```
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$ make test
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$ make validate-examples
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```
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### Virtual schema http/FileSystem
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The `schema` validator uses a virtual [http/FileSystem](https://golang.org/pkg/net/http/#FileSystem) to load the JSON schema files for validating OCI images and/or manifests.
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The virtual file system is generated using the `esc` tool and compiled into consumers of the `schema` package so the JSON schema files don't have to be distributed along with and consumer binaries.
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Whenever changes are being done in any of the `schema/*.json` files, one must refresh the generated virtual file system.
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Otherwise schema changes will not be visible inside `schema` consumers.
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Prerequisites:
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* [esc](https://github.com/mjibson/esc)
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Invocation:
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```
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$ make schema-fs
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```
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### JSON schema formatting
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This target auto-formats all JSON files in the `schema` directory using the `jq` tool.
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Prerequisites:
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* [jq](https://stedolan.github.io/jq/) >=1.5
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Invocation:
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```
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$ make fmt
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```
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### OCI image specification PDF/HTML documentation files
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This target generates a PDF/HTML version of the OCI image specification.
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Prerequisites:
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* [Docker](https://www.docker.com/)
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Invocation:
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```
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$ make docs
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```
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### License header check
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This target checks if the source code includes necessary headers.
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Invocation:
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```
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$ make check-license
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```
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### Clean build artifacts
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This target cleans all generated/compiled artifacts.
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Invocation:
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```
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$ make clean
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```
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### Create PNG images from dot files
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This target generates PNG image files from DOT source files in the `img` directory.
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Prerequisites:
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* [graphviz](http://www.graphviz.org/)
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Invocation:
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```
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$ make img/media-types.png
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```
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