/
adapter.go
57 lines (48 loc) · 1.48 KB
/
adapter.go
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package clowder
import (
"bytes"
"text/template"
"github.com/caddyserver/caddy/v2/caddyconfig"
"github.com/ghodss/yaml"
clowdapp "github.com/redhatinsights/app-common-go/pkg/api/v1"
)
func init() {
caddyconfig.RegisterAdapter("clowder", Adapter{})
}
// Adapter enhances a YAML config with values detected from a ClowdApp config
type Adapter struct{}
type clowderConfig struct {
AppConfig clowdapp.AppConfig
Deps map[string]map[string]clowdapp.DependencyEndpoint
PrivateDeps map[string]map[string]clowdapp.PrivateDependencyEndpoint
}
// Adapt performs configuration substitutions based on Clowder config detected from environment
func (a Adapter) Adapt(body []byte, options map[string]interface{}) (result []byte, warnings []caddyconfig.Warning, err error) {
// Bail early if Clowder is not enabled
if !clowdapp.IsClowderEnabled() {
warnings = append(warnings, caddyconfig.Warning{
Message: "Clowder is not enabled.",
})
return
}
// Template out the provided YAML file
var tmpl *template.Template
tmpl, err = template.New("config").Parse(string(body))
if err != nil {
return
}
var out bytes.Buffer
err = tmpl.Execute(&out, clowderConfig{
AppConfig: *clowdapp.LoadedConfig,
Deps: clowdapp.DependencyEndpoints,
PrivateDeps: clowdapp.PrivateDependencyEndpoints,
})
if err != nil {
return
}
// Finally convert templated YAML to JSON
result, err = yaml.YAMLToJSON(out.Bytes())
return
}
// Interface guard
var _ caddyconfig.Adapter = (*Adapter)(nil)