gocrazy

A collection of (not so) crazy little Golang utils that I use in my projects.

Install

go get github.com/danawoodman/gocrazy

Usage

Env helpers

`gocrazy.Getenv(key, fallback)`

Get an environment variable or fallback to a default value.

import "github.com/danawoodman/gocrazy"

var port = gocrazy.Getenv("PORT", "3000")

Url helpers

`gocrazy.AppendQueryParams(url, params)`

Append query params to a url.

package main

import "github.com/danawoodman/gocrazy"

func main() {
	params := struct {
		Foo string `url:"foo"` // use url tag to specify param name
		Bar string `json:"bar"` // fallback to json tag
		Baz string `url:"-"` // omit
		Bang string // fallback to field name "Bang"
	}{
		Foo: "foo",
		Bar: "bar",
		Baz: "baz",
		Bang: "bang",
	}
	url := gocrazy.AppendQueryParams("https://example.com", params)
}

File paths

`gocrazy.ExpandHome(path)`

Expand a path that starts with ~ or $HOME to the current user's home directory.

package main

import "github.com/danawoodman/gocrazy"

var path = gocrazy.ExpandHome("~/foo/bar")

Maps

`gocrazy.GetNestedField(m, path)`

package main

import "github.com/danawoodman/gocrazy"

func main() {
	m := map[string]interface{}{
		"foo": map[string]interface{}{
			"bar": map[string]interface{}{
				"baz": "hello",
			},
		},
	}

	val, ok := gocrazy.GetNestedField(m, "foo.bar.baz")
	// val == "hello"
	// ok == true
}

Intervals

`gocrazy.ExecuteAtInterval(fn, interval, intervalChan)`

package main

import (
	"fmt"
	"github.com/danawoodman/gocrazy"
)

func main() {
	interval := 1 * time.Second
	intervalChan := make(chan time.Duration)
	go gocrazy.ExecuteAtInterval(func() {
		fmt.Println("Executing function at interval...")
	}, interval, intervalChan)

	time.Sleep(5 * time.Second)

	// Update interval after some time
	intervalChan <- 2 * time.Second

	// keep the program running
	select {}
}

Development

Run tests in watch mode (using gochange) using make or make dev.

Run test suite once with make test.

License

MIT

danawoodman / gocrazy