github.com/amy/helm@v2.7.2+incompatible/cmd/helm/plugin_update.go (about)

     1  /*
     2  Copyright 2017 The Kubernetes Authors All rights reserved.
     3  Licensed under the Apache License, Version 2.0 (the "License");
     4  you may not use this file except in compliance with the License.
     5  You may obtain a copy of the License at
     6  
     7  http://www.apache.org/licenses/LICENSE-2.0
     8  
     9  Unless required by applicable law or agreed to in writing, software
    10  distributed under the License is distributed on an "AS IS" BASIS,
    11  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  See the License for the specific language governing permissions and
    13  limitations under the License.
    14  */
    15  
    16  package main
    17  
    18  import (
    19  	"errors"
    20  	"fmt"
    21  	"io"
    22  	"path/filepath"
    23  	"strings"
    24  
    25  	"k8s.io/helm/pkg/helm/helmpath"
    26  	"k8s.io/helm/pkg/plugin"
    27  	"k8s.io/helm/pkg/plugin/installer"
    28  
    29  	"github.com/spf13/cobra"
    30  )
    31  
    32  type pluginUpdateCmd struct {
    33  	names []string
    34  	home  helmpath.Home
    35  	out   io.Writer
    36  }
    37  
    38  func newPluginUpdateCmd(out io.Writer) *cobra.Command {
    39  	pcmd := &pluginUpdateCmd{out: out}
    40  	cmd := &cobra.Command{
    41  		Use:   "update <plugin>...",
    42  		Short: "update one or more Helm plugins",
    43  		PreRunE: func(cmd *cobra.Command, args []string) error {
    44  			return pcmd.complete(args)
    45  		},
    46  		RunE: func(cmd *cobra.Command, args []string) error {
    47  			return pcmd.run()
    48  		},
    49  	}
    50  	return cmd
    51  }
    52  
    53  func (pcmd *pluginUpdateCmd) complete(args []string) error {
    54  	if len(args) == 0 {
    55  		return errors.New("please provide plugin name to update")
    56  	}
    57  	pcmd.names = args
    58  	pcmd.home = settings.Home
    59  	return nil
    60  }
    61  
    62  func (pcmd *pluginUpdateCmd) run() error {
    63  	installer.Debug = settings.Debug
    64  	debug("loading installed plugins from %s", settings.PluginDirs())
    65  	plugins, err := findPlugins(settings.PluginDirs())
    66  	if err != nil {
    67  		return err
    68  	}
    69  	var errorPlugins []string
    70  
    71  	for _, name := range pcmd.names {
    72  		if found := findPlugin(plugins, name); found != nil {
    73  			if err := updatePlugin(found, pcmd.home); err != nil {
    74  				errorPlugins = append(errorPlugins, fmt.Sprintf("Failed to update plugin %s, got error (%v)", name, err))
    75  			} else {
    76  				fmt.Fprintf(pcmd.out, "Updated plugin: %s\n", name)
    77  			}
    78  		} else {
    79  			errorPlugins = append(errorPlugins, fmt.Sprintf("Plugin: %s not found", name))
    80  		}
    81  	}
    82  	if len(errorPlugins) > 0 {
    83  		return fmt.Errorf(strings.Join(errorPlugins, "\n"))
    84  	}
    85  	return nil
    86  }
    87  
    88  func updatePlugin(p *plugin.Plugin, home helmpath.Home) error {
    89  	exactLocation, err := filepath.EvalSymlinks(p.Dir)
    90  	if err != nil {
    91  		return err
    92  	}
    93  	absExactLocation, err := filepath.Abs(exactLocation)
    94  	if err != nil {
    95  		return err
    96  	}
    97  
    98  	i, err := installer.FindSource(absExactLocation, home)
    99  	if err != nil {
   100  		return err
   101  	}
   102  	if err := installer.Update(i); err != nil {
   103  		return err
   104  	}
   105  
   106  	debug("loading plugin from %s", i.Path())
   107  	updatedPlugin, err := plugin.LoadDir(i.Path())
   108  	if err != nil {
   109  		return err
   110  	}
   111  
   112  	return runHook(updatedPlugin, plugin.Update)
   113  }