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89 lines
2.6 KiB
89 lines
2.6 KiB
7 years ago
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/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package renderutil
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import (
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"fmt"
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"github.com/Masterminds/semver"
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"k8s.io/helm/pkg/chartutil"
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"k8s.io/helm/pkg/engine"
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"k8s.io/helm/pkg/proto/hapi/chart"
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tversion "k8s.io/helm/pkg/version"
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)
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// Options are options for this simple local render
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type Options struct {
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ReleaseOptions chartutil.ReleaseOptions
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KubeVersion string
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}
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// Render chart templates locally and display the output.
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// This does not require the Tiller. Any values that would normally be
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// looked up or retrieved in-cluster will be faked locally. Additionally, none
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// of the server-side testing of chart validity (e.g. whether an API is supported)
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// is done.
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//
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// Note: a `nil` config passed here means "ignore the chart's default values";
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// if you want the normal behavior of merging the defaults with the new config,
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// you should pass `&chart.Config{Raw: "{}"},
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func Render(c *chart.Chart, config *chart.Config, opts Options) (map[string]string, error) {
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if req, err := chartutil.LoadRequirements(c); err == nil {
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if err := CheckDependencies(c, req); err != nil {
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return nil, err
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}
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} else if err != chartutil.ErrRequirementsNotFound {
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return nil, fmt.Errorf("cannot load requirements: %v", err)
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}
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err := chartutil.ProcessRequirementsEnabled(c, config)
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if err != nil {
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return nil, err
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}
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err = chartutil.ProcessRequirementsImportValues(c)
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if err != nil {
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return nil, err
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}
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// Set up engine.
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renderer := engine.New()
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caps := &chartutil.Capabilities{
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APIVersions: chartutil.DefaultVersionSet,
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KubeVersion: chartutil.DefaultKubeVersion,
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TillerVersion: tversion.GetVersionProto(),
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}
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if opts.KubeVersion != "" {
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kv, verErr := semver.NewVersion(opts.KubeVersion)
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if verErr != nil {
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return nil, fmt.Errorf("could not parse a kubernetes version: %v", verErr)
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}
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caps.KubeVersion.Major = fmt.Sprint(kv.Major())
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caps.KubeVersion.Minor = fmt.Sprint(kv.Minor())
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caps.KubeVersion.GitVersion = fmt.Sprintf("v%d.%d.0", kv.Major(), kv.Minor())
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}
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vals, err := chartutil.ToRenderValuesCaps(c, config, opts.ReleaseOptions, caps)
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if err != nil {
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return nil, err
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}
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return renderer.Render(c, vals)
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}
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