121 lines
3.5 KiB
Markdown
121 lines
3.5 KiB
Markdown
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# go-toml
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Go library for the [TOML](https://github.com/mojombo/toml) format.
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This library supports TOML version
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[v0.4.0](https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.4.0.md)
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[](http://godoc.org/github.com/pelletier/go-toml)
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[](https://github.com/pelletier/go-toml/blob/master/LICENSE)
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[](https://travis-ci.org/pelletier/go-toml)
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[](https://coveralls.io/github/pelletier/go-toml?branch=master)
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[](https://goreportcard.com/report/github.com/pelletier/go-toml)
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## Features
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Go-toml provides the following features for using data parsed from TOML documents:
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* Load TOML documents from files and string data
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* Easily navigate TOML structure using TomlTree
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* Line & column position data for all parsed elements
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* Query support similar to JSON-Path
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* Syntax errors contain line and column numbers
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Go-toml is designed to help cover use-cases not covered by reflection-based TOML parsing:
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* Semantic evaluation of parsed TOML
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* Informing a user of mistakes in the source document, after it has been parsed
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* Programatic handling of default values on a case-by-case basis
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* Using a TOML document as a flexible data-store
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## Import
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import "github.com/pelletier/go-toml"
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## Usage
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### Example
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Say you have a TOML file that looks like this:
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```toml
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[postgres]
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user = "pelletier"
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password = "mypassword"
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```
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Read the username and password like this:
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```go
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import (
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"fmt"
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"github.com/pelletier/go-toml"
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)
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config, err := toml.LoadFile("config.toml")
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if err != nil {
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fmt.Println("Error ", err.Error())
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} else {
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// retrieve data directly
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user := config.Get("postgres.user").(string)
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password := config.Get("postgres.password").(string)
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// or using an intermediate object
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configTree := config.Get("postgres").(*toml.TomlTree)
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user = configTree.Get("user").(string)
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password = configTree.Get("password").(string)
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fmt.Println("User is ", user, ". Password is ", password)
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// show where elements are in the file
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fmt.Println("User position: %v", configTree.GetPosition("user"))
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fmt.Println("Password position: %v", configTree.GetPosition("password"))
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// use a query to gather elements without walking the tree
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results, _ := config.Query("$..[user,password]")
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for ii, item := range results.Values() {
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fmt.Println("Query result %d: %v", ii, item)
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}
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}
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```
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## Documentation
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The documentation and additional examples are available at
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[godoc.org](http://godoc.org/github.com/pelletier/go-toml).
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## Tools
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Go-toml provides two handy command line tools:
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* `tomll`: Reads TOML files and lint them.
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```
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go install github.com/pelletier/go-toml/cmd/tomll
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tomll --help
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```
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* `tomljson`: Reads a TOML file and outputs its JSON representation.
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```
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go install github.com/pelletier/go-toml/cmd/tomljson
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tomljson --help
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```
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## Contribute
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Feel free to report bugs and patches using GitHub's pull requests system on
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[pelletier/go-toml](https://github.com/pelletier/go-toml). Any feedback would be
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much appreciated!
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### Run tests
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You have to make sure two kind of tests run:
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1. The Go unit tests
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2. The TOML examples base
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You can run both of them using `./test.sh`.
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## License
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The MIT License (MIT). Read [LICENSE](LICENSE).
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