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117 lines
3.1 KiB
117 lines
3.1 KiB
/*
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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 action
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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"helm.sh/helm/v3/pkg/chartutil"
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"helm.sh/helm/v3/pkg/lint"
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"helm.sh/helm/v3/pkg/lint/support"
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)
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// Lint is the action for checking that the semantics of a chart are well-formed.
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//
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// It provides the implementation of 'helm lint'.
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type Lint struct {
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Strict bool
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Namespace string
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}
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type LintResult struct {
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TotalChartsLinted int
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Messages []support.Message
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Errors []error
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}
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// NewLint creates a new Lint object with the given configuration.
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func NewLint() *Lint {
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return &Lint{}
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}
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// Run executes 'helm Lint' against the given chart.
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func (l *Lint) Run(paths []string, vals map[string]interface{}) *LintResult {
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lowestTolerance := support.ErrorSev
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if l.Strict {
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lowestTolerance = support.WarningSev
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}
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result := &LintResult{}
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for _, path := range paths {
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linter, err := lintChart(path, vals, l.Namespace, l.Strict)
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if err != nil {
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result.Errors = append(result.Errors, err)
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continue
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}
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result.Messages = append(result.Messages, linter.Messages...)
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result.TotalChartsLinted++
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for _, msg := range linter.Messages {
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if msg.Severity >= lowestTolerance {
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result.Errors = append(result.Errors, msg.Err)
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}
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}
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}
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return result
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}
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func lintChart(path string, vals map[string]interface{}, namespace string, strict bool) (support.Linter, error) {
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var chartPath string
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linter := support.Linter{}
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if strings.HasSuffix(path, ".tgz") || strings.HasSuffix(path, ".tar.gz") {
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tempDir, err := ioutil.TempDir("", "helm-lint")
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if err != nil {
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return linter, errors.Wrap(err, "unable to create temp dir to extract tarball")
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}
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defer os.RemoveAll(tempDir)
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file, err := os.Open(path)
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if err != nil {
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return linter, errors.Wrap(err, "unable to open tarball")
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}
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defer file.Close()
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if err = chartutil.Expand(tempDir, file); err != nil {
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return linter, errors.Wrap(err, "unable to extract tarball")
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}
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files, err := ioutil.ReadDir(tempDir)
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if err != nil {
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return linter, errors.Wrapf(err, "unable to read temporary output directory %s", tempDir)
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}
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if !files[0].IsDir() {
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return linter, errors.Errorf("unexpected file %s in temporary output directory %s", files[0].Name(), tempDir)
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}
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chartPath = filepath.Join(tempDir, files[0].Name())
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} else {
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chartPath = path
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}
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// Guard: Error out if this is not a chart.
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if _, err := os.Stat(filepath.Join(chartPath, "Chart.yaml")); err != nil {
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return linter, errors.Wrap(err, "unable to check Chart.yaml file in chart")
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}
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return lint.All(chartPath, vals, namespace, strict), nil
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}
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