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helm/pkg/chartutil/create.go

93 lines
2.6 KiB

package chartutil
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"k8s.io/helm/pkg/proto/hapi/chart"
)
const (
// ChartfileName is the default Chart file name.
ChartfileName = "Chart.yaml"
// ValuesfileName is the default values file name.
ValuesfileName = "values.yaml"
// TemplatesDir is the relative directory name for templates.
TemplatesDir = "templates"
// ChartsDir is the relative directory name for charts dependencies.
ChartsDir = "charts"
// IgnorefileName is the name of the Helm ignore file.
IgnorefileName = ".helmignore"
)
const defaultValues = `# Default values for %s.
# This is a YAML-formatted file.
# Declare name/value pairs to be passed into your templates.
# name: value
`
const defaultIgnore = `# Patterns to ignore when building packages.
# This supports shell glob matching, relative path matching, and
# negation (prefixed with !). Only one pattern per line.
.DS_Store
.git
`
// Create creates a new chart in a directory.
//
// Inside of dir, this will create a directory based on the name of
// chartfile.Name. It will then write the Chart.yaml into this directory and
// create the (empty) appropriate directories.
//
// The returned string will point to the newly created directory. It will be
// an absolute path, even if the provided base directory was relative.
//
// If dir does not exist, this will return an error.
// If Chart.yaml or any directories cannot be created, this will return an
// error. In such a case, this will attempt to clean up by removing the
// new chart directory.
func Create(chartfile *chart.Metadata, dir string) (string, error) {
path, err := filepath.Abs(dir)
if err != nil {
return path, err
}
if fi, err := os.Stat(path); err != nil {
return path, err
} else if !fi.IsDir() {
return path, fmt.Errorf("no such directory %s", path)
}
n := chartfile.Name
cdir := filepath.Join(path, n)
if fi, err := os.Stat(cdir); err == nil && !fi.IsDir() {
return cdir, fmt.Errorf("file %s already exists and is not a directory", cdir)
}
if err := os.MkdirAll(cdir, 0755); err != nil {
return cdir, err
}
if err := SaveChartfile(filepath.Join(cdir, ChartfileName), chartfile); err != nil {
return cdir, err
}
val := []byte(fmt.Sprintf(defaultValues, chartfile.Name))
if err := ioutil.WriteFile(filepath.Join(cdir, ValuesfileName), val, 0644); err != nil {
return cdir, err
}
val = []byte(defaultIgnore)
if err := ioutil.WriteFile(filepath.Join(cdir, IgnorefileName), val, 0644); err != nil {
return cdir, err
}
for _, d := range []string{TemplatesDir, ChartsDir} {
if err := os.MkdirAll(filepath.Join(cdir, d), 0755); err != nil {
return cdir, err
}
}
return cdir, nil
}