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manifest_disk_repository.go
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/
manifest_disk_repository.go
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package manifest
import (
"io"
"io/ioutil"
"os"
"path/filepath"
"github.com/cloudfoundry/cli/cf/errors"
. "github.com/cloudfoundry/cli/cf/i18n"
"github.com/cloudfoundry/cli/generic"
"gopkg.in/yaml.v2"
)
type ManifestRepository interface {
ReadManifest(string) (*Manifest, error)
}
type ManifestDiskRepository struct{}
func NewManifestDiskRepository() (repo ManifestRepository) {
return ManifestDiskRepository{}
}
func (repo ManifestDiskRepository) ReadManifest(inputPath string) (*Manifest, error) {
m := NewEmptyManifest()
manifestPath, err := repo.manifestPath(inputPath)
if err != nil {
return m, errors.NewWithError(T("Error finding manifest"), err)
}
m.Path = manifestPath
mapp, err := repo.readAllYAMLFiles(manifestPath)
if err != nil {
return m, err
}
m.Data = mapp
return m, nil
}
func (repo ManifestDiskRepository) readAllYAMLFiles(path string) (mergedMap generic.Map, err error) {
file, err := os.Open(filepath.Clean(path))
if err != nil {
return
}
defer file.Close()
mapp, err := parseManifest(file)
if err != nil {
return
}
if !mapp.Has("inherit") {
mergedMap = mapp
return
}
inheritedPath, ok := mapp.Get("inherit").(string)
if !ok {
err = errors.New(T("invalid inherit path in manifest"))
return
}
if !filepath.IsAbs(inheritedPath) {
inheritedPath = filepath.Join(filepath.Dir(path), inheritedPath)
}
inheritedMap, err := repo.readAllYAMLFiles(inheritedPath)
if err != nil {
return
}
mergedMap = generic.DeepMerge(inheritedMap, mapp)
return
}
func parseManifest(file io.Reader) (yamlMap generic.Map, err error) {
manifest, err := ioutil.ReadAll(file)
if err != nil {
return
}
mmap := make(map[interface{}]interface{})
err = yaml.Unmarshal(manifest, &mmap)
if err != nil {
return
}
if !generic.IsMappable(mmap) || len(mmap) == 0 {
err = errors.New(T("Invalid manifest. Expected a map"))
return
}
yamlMap = generic.NewMap(mmap)
return
}
func (repo ManifestDiskRepository) manifestPath(userSpecifiedPath string) (string, error) {
fileInfo, err := os.Stat(userSpecifiedPath)
if err != nil {
return "", err
}
if fileInfo.IsDir() {
manifestPaths := []string{
filepath.Join(userSpecifiedPath, "manifest.yml"),
filepath.Join(userSpecifiedPath, "manifest.yaml"),
}
var err error
for _, manifestPath := range manifestPaths {
if _, err = os.Stat(manifestPath); err == nil {
return manifestPath, err
}
}
return "", err
} else {
return userSpecifiedPath, nil
}
}