lib

module

v0.3.1 Latest Latest Go to latest Published: Oct 26, 2026 License: MIT

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
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Repository

github.com/AltSoyuz/lib

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README ¶

lib

Small, focused, dependency-light Go libraries.

This repository is a single Go module (github.com/AltSoyuz/lib). Each top-level directory is an importable package unless documented otherwise.

Philosophy

Minimal external dependencies. Adding a dep requires justification.
Stable APIs. Breaking changes bump the minor version (pre-1.0) or require a /v2 module path (post-1.0). No silent breakage.
Tests are mandatory. Every package ships with *_test.go. CI runs go test -race ./... and go vet ./... on every push and PR.
No frameworks, no magic. Plain net/http, plain database/sql, log/slog. Composition over inheritance.
Read the code. Each package is small enough to fit in your head.

Packages

Package	Purpose
`audit`	Audit log of an app: who changed what, written in the transaction of the change, paged for a back office.
`auth`	Authentication subpackages and SQL artefacts: passwords, sessions, magic links, schema.
`backoffice`	The back office the apps share: roles and access, the session check, admin routes, View as, announcement, account stats.
`buildinfo`	Version flag handling and build info metric registration through `-ldflags`.
`claude`	Minimal Anthropic Messages API client with normal and streaming completions.
`db`	`database/sql` helpers: null conversion, SQLite uniqueness checks, migrations, transactions, and tracing.
`envflag`	`flag` parsing with environment-variable fallback and optional env prefix.
`httpserver`	HTTP helpers for serving, graceful shutdown, JSON, IP detection, rate limiting, and embedded UI assets.
`logger`	Small structured logger with flag-based level/output/timezone settings and stdlib bridge.
`mailer`	Email delivery through blackhole, SMTP, AWS SES v2, or Resend, plus verification URL helper.
`oauthgoogle`	Placeholder Google OAuth provider API that currently reports not available.
`telegram`	Telegram Bot API client for allowed-user checks, sending messages, polling updates, and command parsing.
`web`	UI kit for the SvelteKit apps, copied from the module into each app (not a Go package).

Install

go get github.com/AltSoyuz/lib@latest

import (
    "github.com/AltSoyuz/lib/httpserver"
    "github.com/AltSoyuz/lib/logger"
)

Versioning

Standard Go module semver. Tags are vMAJOR.MINOR.PATCH. While the module is v0.x.y the API may change between minor versions; breaking changes are called out in CHANGELOG.md.

Documentation

Use godoc for package-level details:

go doc github.com/AltSoyuz/lib/mailer
go doc github.com/AltSoyuz/lib/auth/passwords

Contributing

See CONTRIBUTING.md and AGENTS.md.

License

MIT

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Path	Synopsis
audit Package audit writes who changed what into an app's audit_events table (schema.sql), in the transaction of the change, and pages through it for a back office.	Package audit writes who changed what into an app's audit_events table (schema.sql), in the transaction of the change, and pages through it for a back office.
auth Package auth documents the authentication-related subpackages and SQL artefacts in this module.	Package auth documents the authentication-related subpackages and SQL artefacts in this module.
magiclinks Package magiclinks holds shared semantics for one-shot email tokens used by the verify-email and password-reset flows: TTL defaults and stable purpose strings used as DB enums.	Package magiclinks holds shared semantics for one-shot email tokens used by the verify-email and password-reset flows: TTL defaults and stable purpose strings used as DB enums.
passwords Package passwords provides bcrypt password hashing, email normalization, and breach-check via the HaveIBeenPwned k-anonymity API.	Package passwords provides bcrypt password hashing, email normalization, and breach-check via the HaveIBeenPwned k-anonymity API.
schema Package schema documents the authentication SQL artefacts shipped with this module.	Package schema documents the authentication SQL artefacts shipped with this module.
sessions Package sessions provides session token generation, cookie helpers, session policy, and request URL/host detection.	Package sessions provides session token generation, cookie helpers, session policy, and request URL/host detection.
backoffice Package backoffice is the back office the apps share: who may use an app (roles, access states), the session check that enforces it on every request, the admin routes over the accounts, View as, the announcement shown to everyone, the audit log and the account stats.	Package backoffice is the back office the apps share: who may use an app (roles, access states), the session check that enforces it on every request, the admin routes over the accounts, View as, the announcement shown to everyone, the audit log and the account stats.
buildinfo Package buildinfo exposes application version metadata initialized through linker flags and registered as a VictoriaMetrics info metric.	Package buildinfo exposes application version metadata initialized through linker flags and registered as a VictoriaMetrics info metric.
claude Package claude provides a minimal client for the Anthropic Messages API, including non-streaming and streaming text completions.	Package claude provides a minimal client for the Anthropic Messages API, including non-streaming and streaming text completions.
db Package db provides small database/sql helpers for nullable values, SQLite constraint checks, migrations, transactions, and query tracing.	Package db provides small database/sql helpers for nullable values, SQLite constraint checks, migrations, transactions, and query tracing.
envflag Package envflag extends flag parsing with environment-variable fallback.	Package envflag extends flag parsing with environment-variable fallback.
httpserver Package httpserver provides HTTP server helpers for graceful shutdown, JSON responses, strict JSON decoding, pagination, trusted-proxy client IP detection, rate limiting, built-in metrics routes, and embedded UI assets.	Package httpserver provides HTTP server helpers for graceful shutdown, JSON responses, strict JSON decoding, pagination, trusted-proxy client IP detection, rate limiting, built-in metrics routes, and embedded UI assets.
logger Package logger provides a small structured logger with flag-based level, output, and timezone settings.	Package logger provides a small structured logger with flag-based level, output, and timezone settings.
mailer Package mailer sends email through blackhole, SMTP, AWS SES v2, or Resend backends and includes helpers for verification links.	Package mailer sends email through blackhole, SMTP, AWS SES v2, or Resend backends and includes helpers for verification links.
oauthgoogle Package oauthgoogle implements Google Sign-In via the OAuth 2.0 authorization-code flow with PKCE (RFC 7636), using only the standard library.	Package oauthgoogle implements Google Sign-In via the OAuth 2.0 authorization-code flow with PKCE (RFC 7636), using only the standard library.
telegram Package telegram provides a small Telegram Bot API client for sending messages, polling updates, restricting allowed users, and parsing commands.	Package telegram provides a small Telegram Bot API client for sending messages, polling updates, restricting allowed users, and parsing commands.