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91 lines
2.7 KiB
91 lines
2.7 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 cli describes the operating environment for the Helm CLI.
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Helm's environment encapsulates all of the service dependencies Helm has.
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These dependencies are expressed as interfaces so that alternate implementations
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(mocks, etc.) can be easily generated.
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*/
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package cli
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import (
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"os"
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"path/filepath"
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"github.com/spf13/pflag"
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"k8s.io/client-go/util/homedir"
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"helm.sh/helm/pkg/helmpath"
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)
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// defaultHelmHome is the default HELM_HOME.
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var defaultHelmHome = filepath.Join(homedir.HomeDir(), ".helm")
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// EnvSettings describes all of the environment settings.
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type EnvSettings struct {
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// Home is the local path to the Helm home directory.
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Home helmpath.Home
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// Namespace is the namespace scope.
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Namespace string
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// KubeConfig is the path to the kubeconfig file.
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KubeConfig string
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// KubeContext is the name of the kubeconfig context.
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KubeContext string
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// Debug indicates whether or not Helm is running in Debug mode.
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Debug bool
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}
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// AddFlags binds flags to the given flagset.
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func (s *EnvSettings) AddFlags(fs *pflag.FlagSet) {
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fs.StringVar((*string)(&s.Home), "home", defaultHelmHome, "location of your Helm config. Overrides $HELM_HOME")
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fs.StringVarP(&s.Namespace, "namespace", "n", "", "namespace scope for this request")
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fs.StringVar(&s.KubeConfig, "kubeconfig", "", "path to the kubeconfig file")
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fs.StringVar(&s.KubeContext, "kube-context", "", "name of the kubeconfig context to use")
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fs.BoolVar(&s.Debug, "debug", false, "enable verbose output")
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}
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// Init sets values from the environment.
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func (s *EnvSettings) Init(fs *pflag.FlagSet) {
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for name, envar := range envMap {
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setFlagFromEnv(name, envar, fs)
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}
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}
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// PluginDirs is the path to the plugin directories.
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func (s EnvSettings) PluginDirs() string {
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if d, ok := os.LookupEnv("HELM_PLUGIN"); ok {
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return d
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}
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return s.Home.Plugins()
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}
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// envMap maps flag names to envvars
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var envMap = map[string]string{
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"debug": "HELM_DEBUG",
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"home": "HELM_HOME",
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"namespace": "HELM_NAMESPACE",
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}
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func setFlagFromEnv(name, envar string, fs *pflag.FlagSet) {
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if fs.Changed(name) {
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return
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}
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if v, ok := os.LookupEnv(envar); ok {
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fs.Set(name, v)
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}
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}
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