Download Go binaries as fast and easily as possible
This is the inverse of goreleaser. The goreleaser YAML file is read and creates a custom shell script that can download the right package and the right version for the existing machine.
If you use goreleaser already, this will create scripts suitable for "curl bash" style downloads.
- Run godownloader on your
goreleaser.yamlfile - Add the
godownloader.shfile to your repo - Tell your users to use https://raw.githubusercontent.com/YOU/YOURAPP/master/godownloader.sh to install
This is also useful in CI/CD systems such as travis-ci.org.
- Much faster then 'go get' (sometimes up to 100x)
- Make sure your local environment (macOS) and CI environment (Linux) are using the exact same versions of your go binaries.
Let's say you are using hugo, the static website generator, with travis-ci.
Your old .travis.yml file might have
install:
- go get github.com/gohugoio/hugoThis can take up to 30 seconds!
Hugo doesn't have (yet) a godownloader.sh file. So we will make our own:
# create a godownloader script
godownloader -repo gohugoio/hugo > ./godownloader-hugo.sh
and add godownloader-hugo.sh to your GitHub repo. Edit your .travis.yml as such
install:
- ./godownloader-hugo.sh v0.33.1Without a version number, GitHub is queried to get the latest version number.
install:
- ./godownloader-hugo.shTypical download time is 0.3 seconds, or 100x improvement.
Your new hugo binary is in ./bin, so change your Makefie or scripts to use ./bin/hugo.
The default installation directory can be changed with the -b flag.
- Only GitHub Releases are supported right now.
- Checksums are checked.
- Binares are installed using
tar.gzorzip. - No support for Windows anything. I just don't know enough about it.
- No OS-specific installs such as homebrew, deb, rpm. Everything is installed locally via a
tar.gzorzip. Typically OS installs are done differently anyways (e.g. brew, apt-get, yum, etc).
Some people do not use Goreleaser!
There is experimental support for the following alterative distributions.
A naked release is just the raw binary put on GitHub releases. Limited support can be done by
./goreleaser -source raw -repo [owner/repo] -exe [name] -nametpl [tpl]Where exe is the final binary name, and tpl is the same type of name template that Goreleaser uses.
An example repo is at mvdan/sh. Note how repo sh is different than binary shfmt.
Equinox.io is a really interesting platform. Take a look.
There is no API, so godownloader scripts screen scrapes to figure out the latest release. Likewise, checksums are not verified.
./goreleaser -source equinoxio -repo [owner/repo]While Equinox.io supports the concepts of channels, it is hardwired to stable for now.
An example is tdewolff/minify on dl.equinox.io.
It's a go program that reads a YAML file that uses a template to make a posix shell script.
Other applications have written custom shell downloaders and installers:
The golang/dep package manager has a nice downloader, install.sh Their trick to extract a version number from GitHub Releases is excellent:
$(echo "${LATEST_RELEASE}" | tr -s '\n' ' ' | sed 's/.*"tag_name":"//' | sed 's/".*//' )This is probably based on masterminds/glide and it's installer at https://glide.sh/get
Helm is a "tool for managing Kubernetes charts. Charts are packages of pre-configured Kubernetes resources."
It has a get script Of note is that it won't re-install if the desired version is already present.
Chef has the one of the most complete installers:
https://omnitruck.chef.io/install.sh
In particular it has support for
- Support for solaris and aix, and some other less common platforms
- python or perl as installers if curl or wget isn't present
- http proxy support
Caddy is "the HTTP/2 web server with automatic HTTPS" and a NGINX replacement. It has a clever installer:
Of note is GPG signature verification.