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Add ability to interpolate during build

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Now build takes a --values argument, which is a yaml file that can be
used to interpolate the specs that are going to be compiled.
This commit is contained in:
Ettore Di Giacinto
2020-11-27 22:22:20 +01:00
parent 44d33eceba
commit 0fe30ddcfd
13 changed files with 321 additions and 14 deletions
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24
pkg/helpers/helm.go
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@@ -11,7 +11,7 @@ import (
)
// RenderHelm renders the template string with helm
func RenderHelm(template string, values map[string]interface{}) (string, error) {
func RenderHelm(template string, values, d map[string]interface{}) (string, error) {
c := &chart.Chart{
Metadata: &chart.Metadata{
Name: "",
@@ -23,7 +23,7 @@ func RenderHelm(template string, values map[string]interface{}) (string, error)
Values: map[string]interface{}{"Values": values},
}
v, err := chartutil.CoalesceValues(c, map[string]interface{}{})
v, err := chartutil.CoalesceValues(c, map[string]interface{}{"Values": d})
if err != nil {
return "", errors.Wrap(err, "while rendering template")
}
@@ -37,7 +37,7 @@ func RenderHelm(template string, values map[string]interface{}) (string, error)
type templatedata map[string]interface{}
func RenderFiles(toTemplate, valuesFile string) (string, error) {
func RenderFiles(toTemplate, valuesFile string, defaultFile string) (string, error) {
raw, err := ioutil.ReadFile(toTemplate)
if err != nil {
return "", errors.Wrap(err, "reading file "+toTemplate)
@@ -46,14 +46,26 @@ func RenderFiles(toTemplate, valuesFile string) (string, error) {
if !Exists(valuesFile) {
return "", errors.Wrap(err, "file not existing "+valuesFile)
}
def, err := ioutil.ReadFile(valuesFile)
val, err := ioutil.ReadFile(valuesFile)
if err != nil {
return "", errors.Wrap(err, "reading file "+valuesFile)
}
var values templatedata
if err = yaml.Unmarshal(def, &values); err != nil {
d := templatedata{}
if len(defaultFile) > 0 {
def, err := ioutil.ReadFile(defaultFile)
if err != nil {
return "", errors.Wrap(err, "reading file "+valuesFile)
}
if err = yaml.Unmarshal(def, &d); err != nil {
return "", errors.Wrap(err, "unmarshalling file "+toTemplate)
}
}
if err = yaml.Unmarshal(val, &values); err != nil {
return "", errors.Wrap(err, "unmarshalling file "+toTemplate)
}
return RenderHelm(string(raw), values)
return RenderHelm(string(raw), values, d)
}