// generateContexts iterates through the version resources and actions and generates the action
// contexts.
func (g *Generator) generateContexts(verdir string, api *design.APIDefinition, version *design.APIVersionDefinition) error {
ctxFile := filepath.Join(verdir, "contexts.go")
ctxWr, err := NewContextsWriter(ctxFile)
if err != nil {
panic(err) // bug
}
title := fmt.Sprintf("%s: Application Contexts", version.Context())
imports := []*codegen.ImportSpec{
codegen.SimpleImport("fmt"),
codegen.SimpleImport("strconv"),
codegen.SimpleImport("github.com/raphael/goa"),
}
if !version.IsDefault() {
appPkg, err := AppPackagePath()
if err != nil {
return err
}
imports = append(imports, codegen.SimpleImport(filepath.ToSlash(appPkg)))
}
ctxWr.WriteHeader(title, packageName(version), imports)
var appPackage string
if !version.IsDefault() {
appPackage = TargetPackage
}
err = version.IterateResources(func(r *design.ResourceDefinition) error {
if !r.SupportsVersion(version.Version) {
return nil
}
return r.IterateActions(func(a *design.ActionDefinition) error {
ctxName := codegen.Goify(a.Name, true) + codegen.Goify(a.Parent.Name, true) + "Context"
ctxData := ContextTemplateData{
Name: ctxName,
ResourceName: r.Name,
ActionName: a.Name,
Payload: a.Payload,
Params: a.AllParams(),
Headers: r.Headers.Merge(a.Headers),
Routes: a.Routes,
Responses: MergeResponses(r.Responses, a.Responses),
API: api,
Version: version,
AppPackage: appPackage,
}
return ctxWr.Execute(&ctxData)
})
})
g.genfiles = append(g.genfiles, ctxFile)
if err != nil {
return err
}
return ctxWr.FormatCode()
}
// generateControllers iterates through the version resources and generates the low level
// controllers.
func (g *Generator) generateControllers(verdir string, version *design.APIVersionDefinition) error {
ctlFile := filepath.Join(verdir, "controllers.go")
ctlWr, err := NewControllersWriter(ctlFile)
if err != nil {
panic(err) // bug
}
title := fmt.Sprintf("%s: Application Controllers", version.Context())
imports := []*codegen.ImportSpec{
codegen.SimpleImport("github.com/julienschmidt/httprouter"),
codegen.SimpleImport("github.com/raphael/goa"),
}
if !version.IsDefault() {
appPkg, err := AppPackagePath()
if err != nil {
return err
}
imports = append(imports, codegen.SimpleImport(appPkg))
}
ctlWr.WriteHeader(title, packageName(version), imports)
var controllersData []*ControllerTemplateData
version.IterateResources(func(r *design.ResourceDefinition) error {
if !r.SupportsVersion(version.Version) {
return nil
}
data := &ControllerTemplateData{Resource: codegen.Goify(r.Name, true)}
err := r.IterateActions(func(a *design.ActionDefinition) error {
context := fmt.Sprintf("%s%sContext", codegen.Goify(a.Name, true), codegen.Goify(r.Name, true))
action := map[string]interface{}{
"Name": codegen.Goify(a.Name, true),
"Routes": a.Routes,
"Context": context,
}
data.Actions = append(data.Actions, action)
return nil
})
if err != nil {
return err
}
if len(data.Actions) > 0 {
data.Version = version.Version
controllersData = append(controllersData, data)
}
return nil
})
g.genfiles = append(g.genfiles, ctlFile)
if err = ctlWr.Execute(controllersData); err != nil {
return err
}
return ctlWr.FormatCode()
}
// Generated package name for resources supporting the given version.
func packageName(version *design.APIVersionDefinition) (pack string) {
pack = TargetPackage
if version.Version != "" {
pack = codegen.Goify(codegen.VersionPackage(version.Version), false)
}
return
}
// newCoerceData is a helper function that creates a map that can be given to the "Coerce" template.
func newCoerceData(name string, att *design.AttributeDefinition, pkg string, depth int) map[string]interface{} {
return map[string]interface{}{
"Name": name,
"VarName": codegen.Goify(name, false),
"Attribute": att,
"Pkg": pkg,
"Depth": depth,
}
}
// joinNames is a code generation helper function that generates a string built from concatenating
// the keys of the given attribute type (assuming it's an object).
func joinNames(att *design.AttributeDefinition) string {
if att == nil {
return ""
}
obj := att.Type.ToObject()
names := make([]string, len(obj))
i := 0
for n := range obj {
names[i] = fmt.Sprintf("cmd.%s", codegen.Goify(n, true))
i++
}
sort.Strings(names)
return strings.Join(names, ", ")
}
// generateHrefs iterates through the version resources and generates the href factory methods.
func (g *Generator) generateHrefs(verdir string, version *design.APIVersionDefinition) error {
hrefFile := filepath.Join(verdir, "hrefs.go")
resWr, err := NewResourcesWriter(hrefFile)
if err != nil {
panic(err) // bug
}
title := fmt.Sprintf("%s: Application Resource Href Factories", version.Context())
resWr.WriteHeader(title, packageName(version), nil)
err = version.IterateResources(func(r *design.ResourceDefinition) error {
if !r.SupportsVersion(version.Version) {
return nil
}
m := design.Design.MediaTypeWithIdentifier(r.MediaType)
var identifier string
if m != nil {
identifier = m.Identifier
} else {
identifier = "plain/text"
}
canoTemplate := r.URITemplate(version)
canoTemplate = design.WildcardRegex.ReplaceAllLiteralString(canoTemplate, "/%v")
var canoParams []string
if ca := r.CanonicalAction(); ca != nil {
if len(ca.Routes) > 0 {
canoParams = ca.Routes[0].Params(version)
}
}
data := ResourceData{
Name: codegen.Goify(r.Name, true),
Identifier: identifier,
Description: r.Description,
Type: m,
CanonicalTemplate: canoTemplate,
CanonicalParams: canoParams,
}
return resWr.Execute(&data)
})
g.genfiles = append(g.genfiles, hrefFile)
if err != nil {
return err
}
return resWr.FormatCode()
}
// Generate produces the skeleton main.
func (g *Generator) Generate(api *design.APIDefinition) (_ []string, err error) {
go utils.Catch(nil, func() { g.Cleanup() })
defer func() {
if err != nil {
g.Cleanup()
}
}()
mainFile := filepath.Join(codegen.OutputDir, "main.go")
if Force {
os.Remove(mainFile)
}
g.genfiles = append(g.genfiles, mainFile)
_, err = os.Stat(mainFile)
funcs := template.FuncMap{
"tempvar": tempvar,
"generateSwagger": generateSwagger,
"goify": codegen.Goify,
"okResp": okResp,
"newControllerVersion": newControllerVersion,
"versionPkg": codegen.VersionPackage,
"targetPkg": func() string { return TargetPackage },
}
gopath := filepath.SplitList(os.Getenv("GOPATH"))[0]
if err != nil {
var tmpl *template.Template
tmpl, err = template.New("main").Funcs(funcs).Parse(mainTmpl)
if err != nil {
panic(err.Error()) // bug
}
gg := codegen.NewGoGenerator(mainFile)
var outPkg string
outPkg, err = filepath.Rel(gopath, codegen.OutputDir)
if err != nil {
return
}
outPkg = strings.TrimPrefix(filepath.ToSlash(outPkg), "src/")
appPkg := path.Join(outPkg, "app")
swaggerPkg := path.Join(outPkg, "swagger")
imports := []*codegen.ImportSpec{
codegen.SimpleImport("github.com/raphael/goa"),
codegen.SimpleImport(appPkg),
codegen.SimpleImport(swaggerPkg),
codegen.NewImport("log", "gopkg.in/inconshreveable/log15.v2"),
}
if generateSwagger() {
jsonSchemaPkg := path.Join(outPkg, "schema")
imports = append(imports, codegen.SimpleImport(jsonSchemaPkg))
}
gg.WriteHeader("", "main", imports)
data := map[string]interface{}{
"Name": AppName,
"API": api,
}
if err = tmpl.Execute(gg, data); err != nil {
return
}
if err = gg.FormatCode(); err != nil {
return
}
}
tmpl, err := template.New("ctrl").Funcs(funcs).Parse(ctrlTmpl)
if err != nil {
panic(err.Error()) // bug
}
imp, err := filepath.Rel(filepath.Join(gopath, "src"), codegen.OutputDir)
if err != nil {
return
}
imp = path.Join(filepath.ToSlash(imp), "app")
imports := []*codegen.ImportSpec{codegen.SimpleImport(imp)}
api.IterateVersions(func(v *design.APIVersionDefinition) error {
if v.IsDefault() {
return nil
}
imports = append(imports, codegen.SimpleImport(imp+"/"+codegen.Goify(v.Version, false)))
return nil
})
err = api.IterateResources(func(r *design.ResourceDefinition) error {
filename := filepath.Join(codegen.OutputDir, snakeCase(r.Name)+".go")
if Force {
if err := os.Remove(filename); err != nil {
return err
}
}
g.genfiles = append(g.genfiles, filename)
if _, err := os.Stat(filename); err != nil {
resGen := codegen.NewGoGenerator(filename)
resGen.WriteHeader("", "main", imports)
err := tmpl.Execute(resGen, r)
if err != nil {
return err
}
if err := resGen.FormatCode(); err != nil {
return err
}
}
return nil
})
if err != nil {
return
}
return g.genfiles, nil
}
// Generate the application code, implement codegen.Generator.
func (g *Generator) Generate(api *design.APIDefinition) ([]string, error) {
if api == nil {
return nil, fmt.Errorf("missing API definition, make sure design.Design is properly initialized")
}
title := fmt.Sprintf("%s: Application Contexts", api.Name)
imports := []*codegen.ImportSpec{
codegen.SimpleImport("github.com/raphael/goa"),
codegen.SimpleImport("strconv"),
}
g.ContextsWriter.WriteHeader(title, TargetPackage, imports)
err := api.IterateResources(func(r *design.ResourceDefinition) error {
return r.IterateActions(func(a *design.ActionDefinition) error {
ctxName := codegen.Goify(a.Name, true) + codegen.Goify(a.Parent.Name, true) + "Context"
ctxData := ContextTemplateData{
Name: ctxName,
ResourceName: r.Name,
ActionName: a.Name,
Payload: a.Payload,
Params: a.AllParams(),
Headers: r.Headers.Merge(a.Headers),
Routes: a.Routes,
Responses: MergeResponses(r.Responses, a.Responses),
MediaTypes: api.MediaTypes,
Types: api.Types,
}
return g.ContextsWriter.Execute(&ctxData)
})
})
g.genfiles = append(g.genfiles, g.contextsFilename)
if err != nil {
g.Cleanup()
return nil, err
}
if err := g.ContextsWriter.FormatCode(); err != nil {
g.Cleanup()
return nil, err
}
title = fmt.Sprintf("%s: Application Controllers", api.Name)
imports = []*codegen.ImportSpec{
codegen.SimpleImport("github.com/julienschmidt/httprouter"),
codegen.SimpleImport("github.com/raphael/goa"),
}
g.ControllersWriter.WriteHeader(title, TargetPackage, imports)
var controllersData []*ControllerTemplateData
api.IterateResources(func(r *design.ResourceDefinition) error {
data := &ControllerTemplateData{Resource: codegen.Goify(r.Name, true)}
err := r.IterateActions(func(a *design.ActionDefinition) error {
context := fmt.Sprintf("%s%sContext", codegen.Goify(a.Name, true), codegen.Goify(r.Name, true))
action := map[string]interface{}{
"Name": codegen.Goify(a.Name, true),
"Routes": a.Routes,
"Context": context,
}
data.Actions = append(data.Actions, action)
return nil
})
if err != nil {
return err
}
if len(data.Actions) > 0 {
controllersData = append(controllersData, data)
}
return nil
})
g.genfiles = append(g.genfiles, g.controllersFilename)
if err := g.ControllersWriter.Execute(controllersData); err != nil {
g.Cleanup()
return nil, err
}
if err := g.ControllersWriter.FormatCode(); err != nil {
g.Cleanup()
return nil, err
}
title = fmt.Sprintf("%s: Application Resource Href Factories", api.Name)
g.ResourcesWriter.WriteHeader(title, TargetPackage, nil)
err = api.IterateResources(func(r *design.ResourceDefinition) error {
m, ok := api.MediaTypes[r.MediaType]
var identifier string
if ok {
identifier = m.Identifier
} else {
identifier = "application/text"
}
canoTemplate := r.URITemplate()
canoTemplate = design.WildcardRegex.ReplaceAllLiteralString(canoTemplate, "/%v")
var canoParams []string
if ca := r.CanonicalAction(); ca != nil {
if len(ca.Routes) > 0 {
canoParams = ca.Routes[0].Params()
}
}
data := ResourceData{
Name: codegen.Goify(r.Name, true),
Identifier: identifier,
Description: r.Description,
Type: m,
CanonicalTemplate: canoTemplate,
CanonicalParams: canoParams,
}
return g.ResourcesWriter.Execute(&data)
})
g.genfiles = append(g.genfiles, g.resourcesFilename)
if err != nil {
g.Cleanup()
return nil, err
}
if err := g.ResourcesWriter.FormatCode(); err != nil {
g.Cleanup()
return nil, err
}
title = fmt.Sprintf("%s: Application Media Types", api.Name)
imports = []*codegen.ImportSpec{
codegen.SimpleImport("github.com/raphael/goa"),
codegen.SimpleImport("fmt"),
}
g.MediaTypesWriter.WriteHeader(title, TargetPackage, imports)
err = api.IterateMediaTypes(func(mt *design.MediaTypeDefinition) error {
if mt.Type.IsObject() || mt.Type.IsArray() {
return g.MediaTypesWriter.Execute(mt)
}
return nil
})
g.genfiles = append(g.genfiles, g.mediaTypesFilename)
if err != nil {
g.Cleanup()
return nil, err
}
if err := g.MediaTypesWriter.FormatCode(); err != nil {
g.Cleanup()
return nil, err
}
title = fmt.Sprintf("%s: Application User Types", api.Name)
g.UserTypesWriter.WriteHeader(title, TargetPackage, nil)
err = api.IterateUserTypes(func(t *design.UserTypeDefinition) error {
return g.UserTypesWriter.Execute(t)
})
g.genfiles = append(g.genfiles, g.userTypesFilename)
if err != nil {
g.Cleanup()
return nil, err
}
if err := g.UserTypesWriter.FormatCode(); err != nil {
g.Cleanup()
return nil, err
}
return g.genfiles, nil
}