renovate/docs/usage/golang.md
HonkingGoose eb33a4d97a
docs: improve Go documentation (#7820)
* use 1.'s for ordered list

* fix whitespace in ordered list

* use active voice

* capitalize SemVer

* Remove fluff word

* use active voice

* update paragraph, needs further work

* explain how to pin to a specific Go lang version

* change Go version from 1.14.2 -> 1.14.12

* strip patch level from Go version, explain why
2020-11-29 14:29:18 +01:00

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Markdown

---
title: Go Modules
description: Go modules support in Renovate
---
# Automated Dependency Updates for Go Modules
Renovate supports upgrading dependencies in `go.mod` files and their accompanying `go.sum` checksums.
## How It Works
1. Renovate searches in each repository for any `go.mod` files
1. Renovate extracts existing dependencies from `require` statements
1. Renovate resolves the dependency's source repository and checks for SemVer tags if found. Otherwise commits and `v0.0.0-....` syntax will be used
1. If Renovate finds an update, Renovate will update `go.mod` to the new value
1. Renovate runs `go get` to update the `go.sum` files
1. If the user has enabled the option `gomodTidy` in the [`postUpdateOptions`](https://docs.renovatebot.com/configuration-options/#postupdateoptions) array, then Renovate runs `go mod tidy`, which itself can update `go.mod` and `go.sum`
1. `go mod vendor` is run if vendored modules are detected
1. A PR will be created with `go.mod`,`go.sum`, and any updated vendored files updated in the one commit
1. If the source repository has either a "changelog" file or uses GitHub releases, then Release Notes for each version will be embedded in the generated PR
## Enabling Go Modules Updating
Renovate updates Go Modules by default.
To install Renovate Bot itself, either enable the [Renovate App](https://github.com/apps/renovate) on GitHub, or check out [Renovate OSS](https://github.com/renovatebot/renovate) for self-hosted.
## Technical Details
#### Module Tidying
Go Modules tidying is not enabled by default, and is opt-in via the [`postUpdateOptions`](https://docs.renovatebot.com/configuration-options/#postupdateoptions) config option.
The reason for this is that a `go mod tidy` command may make changes to `go.mod` and `go.sum` that are completely unrelated to the updated module(s) in the PR, and so may be confusing to some users.
#### Module Vendoring
Vendoring of Go Modules is done automatically if `vendor/modules.txt` is present.
Renovate will commit all files changed within the `vendor/` folder.
#### Go binary version
By default, Renovate will keep up with the very latest version of `go`.
You can "pin" the `go` version that Renovate uses.
Say you want Renovate to use Go version 1.14, you can do this by adding `go 1.14` to your `go.mod` file.
We do not support pinning Go versions to a specific patch level, so you cannot use `go 1.14.12`, but you can use `go 1.14` in your `go.mod` file.