explaingit

anatolelucet/environ

Analysis updated 2026-07-18 · repo last pushed 2025-11-20

GoAudience · developerComplexity · 2/5QuietSetup · easy

TLDR

A Go library that reads and validates settings from environment variables automatically, converting types, checking formats, and applying defaults so you don't write that boilerplate yourself.

Mindmap

mindmap
  root((environ))
    What it does
      Reads env variables
      Validates types
      Applies defaults
    Tech stack
      Go
    Loading styles
      Tag-based struct
      Builder API
      Manual variables
    Validation
      Port numbers
      URLs
      Email addresses
    Use cases
      Server config
      Startup validation

Code map

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filefunction / class

What do people build with it?

USE CASE 1

Load and validate a server's database URL and port from environment variables at startup.

USE CASE 2

Define required and optional config variables in one struct with defaults and whitelists.

USE CASE 3

Fail fast with a clear error when an environment variable is missing or malformed.

USE CASE 4

Validate specialized values like TCP ports, URLs, or email addresses without writing custom checks.

What is it built with?

Go

How does it compare?

anatolelucet/environ42wim/fabio42wim/go-xmpp
LanguageGoGoGo
Last pushed2025-11-202018-02-042020-01-24
MaintenanceQuietDormantDormant
Setup difficultyeasymoderatemoderate
Complexity2/53/53/5
Audiencedeveloperops devopsdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
Not specified in the explanation.

Copy-paste prompts

Prompt 1
Show me how to use environ's tag-based struct API to load and validate my Go app's environment variables.
Prompt 2
Help me set up environ with a required PORT variable, a default value, and validation that it's between 1 and 65535.
Prompt 3
Walk me through environ's builder-style API for loading environment variables one at a time.
Prompt 4
Explain the difference between environ's Load() and MustLoad() functions and when to use each.

Frequently asked questions

What is environ?

A Go library that reads and validates settings from environment variables automatically, converting types, checking formats, and applying defaults so you don't write that boilerplate yourself.

What language is environ written in?

Mainly Go. The stack also includes Go.

Is environ actively maintained?

Quiet — no commits in 6-12 months (last push 2025-11-20).

What license does environ use?

Not specified in the explanation.

How hard is environ to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is environ for?

Mainly developer.

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