github.com/appscode/helm@v3.0.0-alpha.1+incompatible/cmd/helm/create.go (about)

     1  /*
     2  Copyright The Helm Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"path/filepath"
    23  
    24  	"github.com/spf13/cobra"
    25  
    26  	"helm.sh/helm/cmd/helm/require"
    27  	"helm.sh/helm/pkg/chart"
    28  	"helm.sh/helm/pkg/chartutil"
    29  )
    30  
    31  const createDesc = `
    32  This command creates a chart directory along with the common files and
    33  directories used in a chart.
    34  
    35  For example, 'helm create foo' will create a directory structure that looks
    36  something like this:
    37  
    38  	foo/
    39  	├── .helmignore   # Contains patterns to ignore when packaging Helm charts.
    40  	├── Chart.yaml    # Information about your chart
    41  	├── values.yaml   # The default values for your templates
    42  	├── charts/       # Charts that this chart depends on
    43  	└── templates/    # The template files
    44  
    45  'helm create' takes a path for an argument. If directories in the given path
    46  do not exist, Helm will attempt to create them as it goes. If the given
    47  destination exists and there are files in that directory, conflicting files
    48  will be overwritten, but other files will be left alone.
    49  `
    50  
    51  type createOptions struct {
    52  	starter string // --starter
    53  	name    string
    54  }
    55  
    56  func newCreateCmd(out io.Writer) *cobra.Command {
    57  	o := &createOptions{}
    58  
    59  	cmd := &cobra.Command{
    60  		Use:   "create NAME",
    61  		Short: "create a new chart with the given name",
    62  		Long:  createDesc,
    63  		Args:  require.ExactArgs(1),
    64  		RunE: func(cmd *cobra.Command, args []string) error {
    65  			o.name = args[0]
    66  			return o.run(out)
    67  		},
    68  	}
    69  
    70  	cmd.Flags().StringVarP(&o.starter, "starter", "p", "", "the named Helm starter scaffold")
    71  	return cmd
    72  }
    73  
    74  func (o *createOptions) run(out io.Writer) error {
    75  	fmt.Fprintf(out, "Creating %s\n", o.name)
    76  
    77  	chartname := filepath.Base(o.name)
    78  	cfile := &chart.Metadata{
    79  		Name:        chartname,
    80  		Description: "A Helm chart for Kubernetes",
    81  		Type:        "application",
    82  		Version:     "0.1.0",
    83  		AppVersion:  "0.1.0",
    84  		APIVersion:  chart.APIVersionV1,
    85  	}
    86  
    87  	if o.starter != "" {
    88  		// Create from the starter
    89  		lstarter := filepath.Join(settings.Home.Starters(), o.starter)
    90  		return chartutil.CreateFrom(cfile, filepath.Dir(o.name), lstarter)
    91  	}
    92  
    93  	_, err := chartutil.Create(chartname, filepath.Dir(o.name))
    94  	return err
    95  }