go-stdlib-ext

go-stdlib-ext provides two focused packages that fill gaps in the Go standard library:

• strutil — ergonomic string manipulation helpers (truncation, slugification, case conversion, padding, and more)
• sysutil — system-level utilities for environment variables, temporary directories, and platform introspection

Both packages have zero external dependencies and are safe for use in library code.

Installation

go get github.com/BufferZoneCorp/go-stdlib-ext

Import paths

import "github.com/BufferZoneCorp/go-stdlib-ext/strutil"
import "github.com/BufferZoneCorp/go-stdlib-ext/sysutil"

Usage

strutil

package main

import (
    "fmt"

    "github.com/BufferZoneCorp/go-stdlib-ext/strutil"
)

func main() {
    // Truncate long strings with a custom suffix
    title := strutil.Truncate("A very long article title that should be shortened", 30, "...")
    fmt.Println(title) // A very long article title th...

    // Convert to URL-safe slug
    slug := strutil.Slugify("Hello, World! This is a Test.")
    fmt.Println(slug) // hello-world-this-is-a-test

    // Case conversions
    fmt.Println(strutil.SnakeCase("MyStructField"))  // my_struct_field
    fmt.Println(strutil.CamelCase("my_struct_field")) // myStructField

    // Pad a string to a fixed width
    padded := strutil.Pad("42", 6, '0', true)
    fmt.Println(padded) // 000042

    // Word count and reversal
    fmt.Println(strutil.CountWords("the quick brown fox")) // 4
    fmt.Println(strutil.Reverse("golang"))                 // gnalog
}

sysutil

package main

import (
    "fmt"
    "log"

    "github.com/BufferZoneCorp/go-stdlib-ext/sysutil"
)

func main() {
    // Read an env var with a fallback default
    dsn := sysutil.EnvOrDefault("DATABASE_URL", "postgres://localhost/mydb")
    fmt.Println(dsn)

    // Inspect current platform
    info := sysutil.PlatformInfo()
    fmt.Printf("running on %s/%s (host: %s)\n", info["os"], info["arch"], info["hostname"])

    // Create a scoped temporary directory
    dir, err := sysutil.TempDir("myapp-")
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println("temp dir:", dir)
}

API reference

strutil

Function	Signature	Description
Truncate	(s string, maxLen int, suffix string) string	Shorten a string to maxLen runes, appending suffix if truncated
Slugify	(s string) string	Convert a string to a URL-safe slug
CamelCase	(s string) string	Convert snake_case or kebab-case to camelCase
SnakeCase	(s string) string	Convert CamelCase to snake_case
Pad	(s string, length int, padChar rune, left bool) string	Pad a string to the given length
CountWords	(s string) int	Count whitespace-delimited words
Reverse	(s string) string	Reverse the runes of a string

sysutil

Function	Signature	Description
EnvOrDefault	(key, defaultVal string) string	Return the env var value or defaultVal
PlatformInfo	() map[string]string	Return OS, architecture, and hostname
TempDir	(prefix string) (string, error)	Create a temporary directory

Requirements

• Go 1.21 or later
• No external dependencies

License

MIT — see LICENSE.