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manifest.go
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manifest.go
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package manifest
import (
"fmt"
"path/filepath"
"regexp"
"strconv"
"strings"
"github.com/cloudfoundry/cli/cf/errors"
"github.com/cloudfoundry/cli/cf/formatters"
"github.com/cloudfoundry/cli/cf/models"
"github.com/cloudfoundry/cli/generic"
"github.com/cloudfoundry/cli/words"
)
type Manifest struct {
Path string
Data generic.Map
}
func NewEmptyManifest() (m *Manifest) {
return &Manifest{Data: generic.NewMap()}
}
func (m Manifest) Applications() (apps []models.AppParams, err error) {
rawData, errs := expandProperties(m.Data, words.NewWordGenerator())
if len(errs) > 0 {
err = errors.NewWithSlice(errs)
return
}
data := generic.NewMap(rawData)
appMaps, errs := m.getAppMaps(data)
if len(errs) > 0 {
err = errors.NewWithSlice(errs)
return
}
for _, appMap := range appMaps {
app, errs := mapToAppParams(filepath.Dir(m.Path), appMap)
if len(errs) > 0 {
err = errors.NewWithSlice(errs)
continue
}
apps = append(apps, app)
}
return
}
func (m Manifest) getAppMaps(data generic.Map) (apps []generic.Map, errs []error) {
globalProperties := data.Except([]interface{}{"applications"})
if data.Has("applications") {
appMaps, ok := data.Get("applications").([]interface{})
if !ok {
errs = append(errs, errors.New(T("Expected applications to be a list")))
return
}
for _, appData := range appMaps {
if !generic.IsMappable(appData) {
errs = append(errs, errors.NewWithFmt(T("Expected application to be a list of key/value pairs\nError occurred in manifest near:\n'{{.YmlSnippet}}'",
map[string]interface{}{"YmlSnippet": appData})))
continue
}
appMap := generic.DeepMerge(globalProperties, generic.NewMap(appData))
apps = append(apps, appMap)
}
} else {
apps = append(apps, globalProperties)
}
return
}
var propertyRegex = regexp.MustCompile(`\${[\w-]+}`)
func expandProperties(input interface{}, babbler words.WordGenerator) (output interface{}, errs []error) {
switch input := input.(type) {
case string:
match := propertyRegex.FindStringSubmatch(input)
if match != nil {
if match[0] == "${random-word}" {
output = strings.Replace(input, "${random-word}", strings.ToLower(babbler.Babble()), -1)
} else {
err := errors.NewWithFmt(T("Property '{{.PropertyName}}' found in manifest. This feature is no longer supported. Please remove it and try again.",
map[string]interface{}{"PropertyName": match[0]}))
errs = append(errs, err)
}
} else {
output = input
}
case []interface{}:
outputSlice := make([]interface{}, len(input))
for index, item := range input {
itemOutput, itemErrs := expandProperties(item, babbler)
outputSlice[index] = itemOutput
errs = append(errs, itemErrs...)
}
output = outputSlice
case map[interface{}]interface{}:
outputMap := make(map[interface{}]interface{})
for key, value := range input {
itemOutput, itemErrs := expandProperties(value, babbler)
outputMap[key] = itemOutput
errs = append(errs, itemErrs...)
}
output = outputMap
case generic.Map:
outputMap := generic.NewMap()
generic.Each(input, func(key, value interface{}) {
itemOutput, itemErrs := expandProperties(value, babbler)
outputMap.Set(key, itemOutput)
errs = append(errs, itemErrs...)
})
output = outputMap
default:
output = input
}
return
}
func mapToAppParams(basePath string, yamlMap generic.Map) (appParams models.AppParams, errs []error) {
errs = checkForNulls(yamlMap)
if len(errs) > 0 {
return
}
appParams.BuildpackUrl = stringValOrDefault(yamlMap, "buildpack", &errs)
appParams.DiskQuota = bytesVal(yamlMap, "disk_quota", &errs)
appParams.Domain = stringVal(yamlMap, "domain", &errs)
appParams.Host = stringVal(yamlMap, "host", &errs)
appParams.Name = stringVal(yamlMap, "name", &errs)
appParams.Path = stringVal(yamlMap, "path", &errs)
appParams.StackName = stringVal(yamlMap, "stack", &errs)
appParams.Command = stringValOrDefault(yamlMap, "command", &errs)
appParams.Memory = bytesVal(yamlMap, "memory", &errs)
appParams.InstanceCount = intVal(yamlMap, "instances", &errs)
appParams.HealthCheckTimeout = intVal(yamlMap, "timeout", &errs)
appParams.NoRoute = boolVal(yamlMap, "no-route", &errs)
appParams.UseRandomHostname = boolVal(yamlMap, "random-route", &errs)
appParams.ServicesToBind = sliceOrEmptyVal(yamlMap, "services", &errs)
appParams.EnvironmentVars = envVarOrEmptyMap(yamlMap, &errs)
if appParams.Path != nil {
path := *appParams.Path
if filepath.IsAbs(path) {
path = filepath.Clean(path)
} else {
path = filepath.Join(basePath, path)
}
appParams.Path = &path
}
return
}
func checkForNulls(yamlMap generic.Map) (errs []error) {
generic.Each(yamlMap, func(key interface{}, value interface{}) {
if key == "command" || key == "buildpack" {
return
}
if value == nil {
errs = append(errs, errors.NewWithFmt(T("{{.PropertyName}} should not be null", map[string]interface{}{"PropertyName": key})))
}
})
return
}
func stringVal(yamlMap generic.Map, key string, errs *[]error) *string {
val := yamlMap.Get(key)
if val == nil {
return nil
}
result, ok := val.(string)
if !ok {
*errs = append(*errs, errors.NewWithFmt(T("{{.PropertyName}} must be a string value", map[string]interface{}{"PropertyName": key})))
return nil
}
return &result
}
func stringValOrDefault(yamlMap generic.Map, key string, errs *[]error) *string {
if !yamlMap.Has(key) {
return nil
}
empty := ""
switch val := yamlMap.Get(key).(type) {
case string:
if val == "default" {
return &empty
} else {
return &val
}
case nil:
return &empty
default:
*errs = append(*errs, errors.NewWithFmt(T("{{.PropertyName}} must be a string or null value", map[string]interface{}{"PropertyName": key})))
return nil
}
}
func bytesVal(yamlMap generic.Map, key string, errs *[]error) *uint64 {
yamlVal := yamlMap.Get(key)
if yamlVal == nil {
return nil
}
value, err := formatters.ToMegabytes(yamlVal.(string))
if err != nil {
*errs = append(*errs, errors.NewWithFmt(T("Unexpected value for {{.PropertyName}} :\n{{.Error}}",
map[string]interface{}{"PropertyName": key, "Error": err.Error()})))
return nil
}
return &value
}
func intVal(yamlMap generic.Map, key string, errs *[]error) *int {
var (
intVal int
err error
)
switch val := yamlMap.Get(key).(type) {
case string:
intVal, err = strconv.Atoi(val)
case int:
intVal = val
case int64:
intVal = int(val)
case nil:
return nil
default:
err = errors.NewWithFmt(T("Expected {{.PropertyName}} to be a number, but it was a {{.PropertyType}}.",
map[string]interface{}{"PropertyName": key, "PropertyType": val}))
}
if err != nil {
*errs = append(*errs, err)
return nil
}
return &intVal
}
func boolVal(yamlMap generic.Map, key string, errs *[]error) bool {
switch val := yamlMap.Get(key).(type) {
case nil:
return false
case bool:
return val
case string:
return val == "true"
default:
*errs = append(*errs, errors.NewWithFmt(T("Expected {{.PropertyName}} to be a boolean.", map[string]interface{}{"PropertyName": key})))
return false
}
}
func sliceOrEmptyVal(yamlMap generic.Map, key string, errs *[]error) *[]string {
if !yamlMap.Has(key) {
return new([]string)
}
var (
stringSlice []string
err error
)
sliceErr := errors.NewWithFmt(T("Expected {{.PropertyName}} to be a list of strings.",
map[string]interface{}{"PropertyName": key}))
switch input := yamlMap.Get(key).(type) {
case []interface{}:
for _, value := range input {
stringValue, ok := value.(string)
if !ok {
err = sliceErr
break
}
stringSlice = append(stringSlice, stringValue)
}
default:
err = sliceErr
}
if err != nil {
*errs = append(*errs, err)
return nil
}
return &stringSlice
}
func envVarOrEmptyMap(yamlMap generic.Map, errs *[]error) *map[string]string {
key := "env"
switch envVars := yamlMap.Get(key).(type) {
case nil:
aMap := make(map[string]string, 0)
return &aMap
case map[string]interface{}:
yamlMap.Set(key, generic.NewMap(yamlMap.Get(key)))
return envVarOrEmptyMap(yamlMap, errs)
case map[interface{}]interface{}:
yamlMap.Set(key, generic.NewMap(yamlMap.Get(key)))
return envVarOrEmptyMap(yamlMap, errs)
case generic.Map:
merrs := validateEnvVars(envVars)
if merrs != nil {
*errs = append(*errs, merrs...)
return nil
}
result := make(map[string]string, envVars.Count())
generic.Each(envVars, func(key, value interface{}) {
switch value.(type) {
case string:
result[key.(string)] = value.(string)
case int64, int, int32:
result[key.(string)] = fmt.Sprintf("%d", value)
case float32, float64:
result[key.(string)] = fmt.Sprintf("%f", value)
default:
*errs = append(*errs, errors.NewWithFmt(T("Expected environment variable {{.PropertyName}} to have a string value, but it was a {{.PropertyType}}.",
map[string]interface{}{"PropertyName": key, "PropertyType": value})))
}
})
return &result
default:
*errs = append(*errs, errors.NewWithFmt(T("Expected {{.Name}} to be a set of key => value, but it was a {{.Type}}.",
map[string]interface{}{"Name": key, "Type": envVars})))
return nil
}
}
func validateEnvVars(input generic.Map) (errs []error) {
generic.Each(input, func(key, value interface{}) {
if value == nil {
errs = append(errs, errors.New(fmt.Sprintf(T("env var '{{.PropertyName}}' should not be null",
map[string]interface{}{"PropertyName": key}))))
}
})
return
}