Helps Turn GitHub Repositories into Helm Chart Repositories
cr is a tool designed to help GitHub repos self-host their own chart repos by adding Helm chart artifacts to GitHub Releases named for the chart version and then creating an index.yaml file for those releases that can be hosted on GitHub Pages (or elsewhere!).
Download your preferred asset from the releases page and install manually.
$ brew tap helm/tap
$ brew install chart-releaser$ # clone repo to some directory outside GOPATH
$ git clone https://github.com/helm/chart-releaser
$ cd chart-releaser
$ go mod download
$ go install ./...Docker images are pushed to the helmpack/chart-releaser Quay container registry. The Docker image is built on top of Alpine and its default entry-point is cr. See the Dockerfile for more details.
Currently, cr can create GitHub Releases from a set of charts packaged up into a directory and create an index.yaml file for the chart repository from GitHub Releases.
$ cr --help
Create Helm chart repositories on GitHub Pages by uploading Chart packages
and Chart metadata to GitHub Releases and creating a suitable index file
Usage:
cr [command]
Available Commands:
completion generate the autocompletion script for the specified shell
help Help about any command
index Update Helm repo index.yaml for the given GitHub repo
package Package Helm charts
upload Upload Helm chart packages to GitHub Releases
version Print version information
Flags:
--config string Config file (default is $HOME/.cr.yaml)
-h, --help help for cr
Use "cr [command] --help" for more information about a command.Scans a path for Helm chart packages and creates releases in the specified GitHub repo uploading the packages.
$ cr upload --help
Upload Helm chart packages to GitHub Releases
Usage:
cr upload [flags]
Flags:
-c, --commit string Target commit for release
-b, --git-base-url string GitHub Base URL (only needed for private GitHub) (default "https://api.github.com/")
-r, --git-repo string GitHub repository
-u, --git-upload-url string GitHub Upload URL (only needed for private GitHub) (default "https://uploads.github.com/")
-h, --help help for upload
-o, --owner string GitHub username or organization
-p, --package-path string Path to directory with chart packages (default ".cr-release-packages")
--release-name-template string Go template for computing release names, using chart metadata (default "{{ .Name }}-{{ .Version }}")
--release-notes-file string Markdown file with chart release notes. If it is set to empty string, or the file is not found, the chart description will be used instead
--skip-existing Skip upload if release exists
-t, --token string GitHub Auth Token
Global Flags:
--config string Config file (default is $HOME/.cr.yaml)Once uploaded you can create an index.yaml file that can be hosted on GitHub Pages (or elsewhere).
$ cr index --help
Update a Helm chart repository index.yaml file based on a the
given GitHub repository's releases.
Usage:
cr index [flags]
Flags:
-b, --git-base-url string GitHub Base URL (only needed for private GitHub) (default "https://api.github.com/")
-r, --git-repo string GitHub repository
-u, --git-upload-url string GitHub Upload URL (only needed for private GitHub) (default "https://uploads.github.com/")
-h, --help help for index
-i, --index-path string Path to index file (default ".cr-index/index.yaml")
-o, --owner string GitHub username or organization
-p, --package-path string Path to directory with chart packages (default ".cr-release-packages")
--pages-branch string The GitHub pages branch (default "gh-pages")
--pages-index-path string The GitHub pages index path (default "index.yaml")
--pr Create a pull request for index.yaml against the GitHub Pages branch (must not be set if --push is set)
--push Push index.yaml to the GitHub Pages branch (must not be set if --pr is set)
--release-name-template string Go template for computing release names, using chart metadata (default "{{ .Name }}-{{ .Version }}")
--remote string The Git remote used when creating a local worktree for the GitHub Pages branch (default "origin")
-t, --token string GitHub Auth Token (only needed for private repos)
Global Flags:
--config string Config file (default is $HOME/.cr.yaml)cr is a command-line application.
All command-line flags can also be set via environment variables or config file.
Environment variables must be prefixed with CR_.
Underscores must be used instead of hyphens.
CLI flags, environment variables, and a config file can be mixed. The following order of precedence applies:
- CLI flags
- Environment variables
- Config file
The following example show various ways of configuring the same thing:
cr upload --owner myaccount --git-repo helm-charts --package-path .deploy --token 123456789
export CR_OWNER=myaccount
export CR_GIT_REPO=helm-charts
export CR_PACKAGE_PATH=.deploy
export CR_TOKEN="123456789"
export CR_GIT_BASE_URL="https://api.github.com/"
export CR_GIT_UPLOAD_URL="https://uploads.github.com/"
export CR_SKIP_EXISTING=true
cr upload
config.yaml:
owner: myaccount
git-repo: helm-charts
package-path: .deploy
token: 123456789
git-base-url: https://api.github.com/
git-upload-url: https://uploads.github.com/cr upload --config config.yaml
cr supports any format Viper can read, i. e. JSON, TOML, YAML, HCL, and Java properties files.
Notice that if no config file is specified, cr.yaml (or any of the supported formats) is loaded from the current directory, $HOME/.cr, or /etc/cr, in that order, if found.
For Github Enterprise, chart-releaser users need to set git-base-url and git-upload-url correctly, but the correct values are not always obvious to endusers.
By default they are often along these lines:
https://ghe.example.com/api/v3/
https://ghe.example.com/api/uploads/
If you are trying to figure out what your upload_url is try to use a curl command like this:
curl -u username:token https://example.com/api/v3/repos/org/repo/releases
and then look for upload_url. You need the part of the URL that appears before repos/ in the path.
Currently, if you set the upload URL incorrectly, let's say to something like https://example.com/uploads/, then cr upload will appear to work, but the release will not be complete. When everything is working there should be 3 assets in each release, but instead there will only be the 2 source code assets. The third asset, which is what helm actually uses, is missing. This issue will become apparent when you run cr index and it always claims that nothing has changed, because it can't find the asset it expects for the release.
It appears like the go-github Do call does not catch the fact that the upload URL is incorrect and pass back the expected error. If the asset upload fails, it would be better if the release was rolled back (deleted) and an appropriate log message is be displayed to the user.
The cr index command should also generate a warning when a release has no assets attached to it, to help people detect and troubleshoot this type of problem.