Go Proxy

Open source implementation of Go proxy with monorepo support (more projects with go.mod and different versions in the same GIT repository).

Additional endpoints

This is an extension of basic Go proxy functionality.

Address	Description
/versions.json	Latest versions of modules.
/dl/{name}/{version}/{arch}	Downloads endpoint.
/dl/versions.json	Downloads latest versions.

Note: Downloads prefix (dl) is configurable.

Configuration

JSON path	Description	Example
/addr	Service HTTP listen address.	":80"
/storage	Path to storage.	"./cache"
/log_level	Log level.	"trace"
/default_go_proxy_url	URL of default Go proxy for fallback.	"http://proxy.golang.org"
/downloads_prefix	Prefix for downloads path.	"dl"
/modules	Modules configurations.
/downloads	Downloads configurations.
/sources	Sources configurations.

Available log levels are panic, fatal, error, warn, info, debug, trace or an empty string for default log level.

See local configuration file for more details.

Modules configuration

JSON path	Description	Example
/name	Name of module without version suffix.	"example.com/go/lib"
/source	Source name from list of sources or null.	"gitlab-local"
/source_params	Source parameters object (depends on source type).

The fallback to default_go_proxy_url can be disabled with the parameter /source set to null. It results in 404 for a given module instead of the fallback to default_go_proxy_url, which could result in unexpected states confusing Go SDK.

As every request to get a module from Go SDK is a cascade of requests - an attempt to download "example.com/go/lib" is in fact done by a cascade of requests:

• "example.com/go/lib"
• "example.com/go"
• "example.com"

If the fallback for "example.com/go" and "example.com" wasn't disabled, these requests would be redirected to default_go_proxy_url and have finished with an error.

Downloads configuration

JSON path	Description	Example
/mode	Mode (only generic-packages is allowed).	"generic-packages"
/source	Source name from list of sources.	"gitlab-local"
/source_params	Source parameters object (depends on source type).

All configured downloads are available on path: /dl/<name>/<version> or /dl/<name>/<version>/<arch>

Version is <major>.<minor>.<patch> or latest.

Sources configuration

JSON path	Description	Example
/name	Name of the source (unique at source list).	"gitlab-local"
/type	Source type from supported source types.	"gitlab"

Source type gitlab

Source configuration (at /sources):

JSON path	Description	Example
/url	URL of Gitlab.	"https://gitlab.example.com"
/auth	Private token to access Gitlab.	"1111111111"
/allow_insecure_tls	Do not fail on invalid certificate.	true

Source parameters configuration (at /modules):

JSON path	Description	Example
/project_id	Gitlab project ID.	42
/dir	Directory with project relative to git root.	"lib"
/tag_prefix	Tag prefix (e.g. lib- for tag lib-v1.0.0).	"lib-"
/version_dir	Each version at separated directory, see below.	false

If /version_dir is true, major versions 2 and higher are expected at subdirectories, e.g.:

Versions	Directory
0.x.x and 1.x.x	/project/
2.x.x	/project/v2
3.x.x	/project/v3

Source downloads parameters configuration (at /downloads):

JSON path	Description	Example
/project_id	Gitlab project ID.	42
/package_name	Name of package.	"lib"
/disable_architecture	Remove <arch> parameter from URL.	false
/file_extension	File extension at package registry (optional).	".yaml"

File storage

• Root of file storage is configurable by /storage property in the config.
• Each module has its own directory (without version suffix v2).
• Each version has its own files with a version prefix (e.g. v1.0.0).
  • File .lock contains the date and time of lock. This file is present only if a new version is being processed.
  • File .tmp contains temporary data during version processing.
  • File .info is an info file (see Go proxy specification).
  • File .mod is Go modules file.
  • File .zip is zip archive with a whole module at specified version.

Dockerfile

You must build this image from the root of the repository.

docker build -t goproxy .

To set version:

docker build --build-arg GOPROXY_VERSION=2.0.0 -t goproxy .