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Automatically create github README.md's from Go source code

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# autoreadme

Automatically generate a github README.md for each package in your Go module.

## Examples

Create a README.md for each package in the current module (Warning: this will overwrite any existing README.md files!)

autoreadme

Get a copy of the default template for customization

autoreadme -print-template >README.md.template

## Template Variables

Templates are executed by Go's text/template. The dot is set to a struct containing (each explained below)

.ProjectRoot
	.Repository
	.Module
	.Package

ProjectRoot is a boolean which is true if the current package is in the same directory as go.mod.

The Repository entry consists solely of .Data, which may contain optional arbitrary data set by JSON in .github/autoreadme/README.md.data.

The Module entry contains:

.Path - the name of the module
	.Version - the version of the module
	.Deprecated - deprecation notice, if present
	.GoVersion - the language version of the module
	.Toolchain - the toolchain version of the module
	.Documentation - a Documentation entry (see below)

The Package entry contains:

.Name
	.Import - the import path of the package
	.Documentation - a Documentation entry (see below)
	.Data - optional arbitrary data set by a JSON in ./README.md.data
	.Library - true if not a command
	.Command - true if package main
	.Notes - a list of Note (see below) entries
	.Examples - a list of Example (see below) entries
	.ExternalExamples - like Examples but for examples from package X_test

Name is the package name for libraries. However, for commands that is always "main" so for commands it uses the name of the directory.

Documentation entries contain

.Synopsis - The first sentence as plain text
	.Doc - the raw go/doc/comment/Doc
	.Empty - false if there is documentation

additionally Documentation has a

.ToMarkdown headingLevel

method that renders .Doc as markdown. Each heading in Doc is set to headingLevel, allowing them to be properly nested in context.

For packages, the documentation is computed in the standard way by comments attached to the package token. For modules, similar logic is used for the comments attached to the module token (note: any Deprecated: comment is not included, but can be accessed from .Module.Deprecated).

Example entries contain

.Name - func Name without Example prefix
	.Documentation - Doc entry for the example func
	.Code - markdown formatted code
	.Output - the expected output, if specified
	.Playable - if the example is self-contained
	.Unordered - if the output is unordered
	.EmptyOutput - if the expected result is no output

and the lists of examples have a few methods

1. Playable - returns a list where Playable is true
 2. Named name - returns the single Example with that exact name or halts execution if there is none
 3. Matching pattern - returns all examples whose name matches the RE2 regexp pattern

Note entries collect the "KIND(uid): body" notes from the package (per go/doc)

.Kind - the kind of note
	.UID - the name associated with this name
	.Body - the text of the note

The list of notes has two methods, Kind and UID, which take a string and return a list of notes matching the respective Kind/UID.

## Repository Configuration

A number of files can be added to a .github/autoreadme directory at the root of your repository.

1. .github/autoreadme/README.md.template will override the built in default template for all packages without their own template
 2. .github/autoreadme/README.md.data can contain a single JSON document that can be accessed by every template using .Repository.Data
 3. .github/autoreadme/autoreadme.ignore can contain a newline separated list of import paths that will be skipped when README.md are generated

## Package configuration

Two files can be added to the directory of each package for one-off customizations

1. README.md.template will override the default (or repository) template
 2. README.md.data can contain a single JSON document that can be accessed by .Package.Data

---
Automatically generated by [autoreadme](https://github.com/jimmyfrasche/autoreadme)

autoreadme

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