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parser.go
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parser.go
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package manifestparser
import (
"errors"
"io/ioutil"
"os"
"path/filepath"
"github.com/cloudfoundry/bosh-cli/director/template"
"gopkg.in/yaml.v2"
)
type Parser struct {
PathToManifest string
Applications []Application
rawManifest []byte
validators []validatorFunc
hasParsed bool
}
func NewParser() *Parser {
parser := new(Parser)
return parser
}
func (parser Parser) AppNames() []string {
var names []string
for _, app := range parser.Applications {
names = append(names, app.Name)
}
return names
}
func (parser *Parser) Apps(appName string) ([]Application, error) {
if appName == "" {
return parser.Applications, nil
}
for _, app := range parser.Applications {
if app.Name == appName {
return []Application{app}, nil
}
}
return nil, AppNotInManifestError{Name: appName}
}
func (parser Parser) ContainsManifest() bool {
return parser.hasParsed
}
func (parser Parser) ContainsMultipleApps() bool {
return len(parser.Applications) > 1
}
func (parser Parser) ContainsPrivateDockerImages() bool {
for _, app := range parser.Applications {
if app.Docker != nil && app.Docker.Username != "" {
return true
}
}
return false
}
func (parser Parser) FullRawManifest() []byte {
return parser.rawManifest
}
func (parser *Parser) GetPathToManifest() string {
return parser.PathToManifest
}
// InterpolateAndParse reads the manifest at the provided paths, interpolates
// variables if a vars file is provided, and sets the current manifest to the
// resulting manifest.
func (parser *Parser) InterpolateAndParse(pathToManifest string, pathsToVarsFiles []string, vars []template.VarKV) error {
rawManifest, err := ioutil.ReadFile(pathToManifest)
if err != nil {
return err
}
tpl := template.NewTemplate(rawManifest)
fileVars := template.StaticVariables{}
for _, path := range pathsToVarsFiles {
rawVarsFile, ioerr := ioutil.ReadFile(path)
if ioerr != nil {
return ioerr
}
var sv template.StaticVariables
err = yaml.Unmarshal(rawVarsFile, &sv)
if err != nil {
return InvalidYAMLError{Err: err}
}
for k, v := range sv {
fileVars[k] = v
}
}
for _, kv := range vars {
fileVars[kv.Name] = kv.Value
}
rawManifest, err = tpl.Evaluate(fileVars, nil, template.EvaluateOpts{ExpectAllKeys: true})
if err != nil {
return InterpolationError{Err: err}
}
parser.PathToManifest = pathToManifest
return parser.parse(rawManifest)
}
func (parser Parser) RawAppManifest(appName string) ([]byte, error) {
var appManifest manifest
for _, app := range parser.Applications {
if app.Name == appName {
appManifest.Applications = []Application{app}
return yaml.Marshal(appManifest)
}
}
return nil, AppNotInManifestError{Name: appName}
}
func (parser *Parser) parse(manifestBytes []byte) error {
parser.rawManifest = manifestBytes
pathToManifest := parser.GetPathToManifest()
var raw manifest
err := yaml.Unmarshal(manifestBytes, &raw)
if err != nil {
return err
}
parser.Applications = raw.Applications
if len(parser.Applications) == 0 {
return errors.New("must have at least one application")
}
for index, application := range parser.Applications {
if application.Name == "" {
return errors.New("Found an application with no name specified")
}
if application.Path == "" {
continue
}
var finalPath = application.Path
if !filepath.IsAbs(finalPath) {
finalPath = filepath.Join(filepath.Dir(pathToManifest), finalPath)
}
finalPath, err = filepath.EvalSymlinks(finalPath)
if err != nil {
if os.IsNotExist(err) {
return InvalidManifestApplicationPathError{
Path: application.Path,
}
}
return err
}
parser.Applications[index].Path = finalPath
}
parser.hasParsed = true
return nil
}