diff --git a/.gitignore b/.gitignore
index 0580e79..7996b33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,3 +35,7 @@ opier
*.swp
*.flac
.idea
+
+# Do not check in test data
+*.yml
+*.yaml
diff --git a/cmd/generate.go b/cmd/generate.go
new file mode 100644
index 0000000..17a0da4
--- /dev/null
+++ b/cmd/generate.go
@@ -0,0 +1,83 @@
+package cmd // import "udico.de/uditaren/opier/cmd"
+import (
+ log "github.com/sirupsen/logrus"
+ "github.com/spf13/cobra"
+ "io/ioutil"
+ "os"
+ "path"
+ "strings"
+ "udico.de/opier/encode"
+ "udico.de/opier/openapi"
+)
+
+var cGenerate = &cobra.Command{
+ Use: "generate ",
+ Short: "Generate Go code from a given input file",
+ Long: `Generate Go code from a given input file, where can either be a local
+or a remote file (when starting with http(s)://)`,
+
+ Args: cobra.ExactArgs(1),
+}
+
+var packageName = "api"
+
+func init() {
+ cGenerate.RunE = executeGenerate
+ cGenerate.PersistentFlags().StringVarP(&packageName, "package", "p","api", "The name of the generated package")
+
+ cRoot.AddCommand(cGenerate)
+}
+
+func executeGenerate(cmd *cobra.Command, args []string) error {
+ log.WithField("input", args[0]).Debugf("Generate Go code")
+
+ api, err := openapi.Load(args[0])
+ if err != nil {
+ log.WithError(err).Fatal("cannot load input data")
+ }
+
+ log.Infof("API: %v, %v", api.Info.Title, api.Info.Version)
+ log.Info("Paths:")
+ for k, _ := range api.Paths {
+ log.Infof(" - %v", k)
+ for m, n := range api.Paths[k].Operations() {
+ log.Infof( " [%v] %v: %v", m, n.OperationId, n.Summary)
+ }
+ }
+
+ os.Mkdir(packageName, 0755)
+ os.Mkdir(path.Join(packageName, "schema"), 0755)
+ tEnc := encode.NewEncoder(packageName)
+
+ log.Info("Types:")
+ for k, v := range api.Components.Schemas {
+ log.Infof("File: %v.go", strings.ToLower(k))
+ tData := ""
+ switch v.Type {
+ case "array":
+ //log.Infof(" [%v]", v.Items.TypeOrReference())
+ tData = tEnc.Array(k, v)
+
+ case "object", "":
+ tData = tEnc.Object(k, v)
+
+ default:
+ if len(v.Enum) > 0 {
+ tData = tEnc.Enum(k, v)
+ } else {
+ log.Warnf("UNKNOWN TYPE!!! %v , %v", k, v.Type)
+ }
+ }
+ if tData == "" {
+ log.Warnf("no data in %v", k)
+ continue
+ }
+ err = ioutil.WriteFile(path.Join(packageName, k + ".go"), []byte(tData[:]) ,0644)
+ if err != nil {
+ log.WithError(err).Fatal("cannot create file")
+ }
+
+ }
+
+ return nil
+}
diff --git a/cmd/root.go b/cmd/root.go
new file mode 100644
index 0000000..48c1c72
--- /dev/null
+++ b/cmd/root.go
@@ -0,0 +1,31 @@
+package cmd // import "udico.de/uditaren/opier/cmd"
+
+import (
+ log "github.com/sirupsen/logrus"
+ "github.com/spf13/cobra"
+)
+
+var cRoot = &cobra.Command {
+ Use: "opier ",
+ Short: "Generate go code from OpenAPI YAML files",
+}
+
+func init() {
+ cRoot.PreRun = preexec
+ cRoot.PostRun = postexec
+}
+
+func Execute() {
+ if err := cRoot.Execute(); err != nil {
+ log.WithError(err).Fatal("top level oops")
+ }
+}
+
+func preexec(cmd *cobra.Command, args []string) {
+
+}
+
+func postexec(cmd *cobra.Command, args []string) {
+
+}
+
diff --git a/encode/array.go b/encode/array.go
new file mode 100644
index 0000000..fc5d84b
--- /dev/null
+++ b/encode/array.go
@@ -0,0 +1,22 @@
+package encode // import "udico.de/uditaren/opier/encode"
+import (
+ "bytes"
+ "fmt"
+ "strings"
+ "udico.de/opier/openapi"
+)
+
+func (e Encoder) Array(name string, schema openapi.Schema) string {
+ tBuf := bytes.Buffer{}
+ tBuf.WriteString(fmt.Sprintf("package %v\n\n", e.Package))
+ tBuf.WriteString(e.GeneratedHeader())
+
+ if schema.Description != "" {
+ tDesc := strings.Split(strings.TrimSpace(schema.Description), "\n")
+ for _, tLine := range tDesc {
+ tBuf.WriteString(fmt.Sprintf("// %v\n", tLine))
+ }
+ }
+ tBuf.WriteString(fmt.Sprintf("type %v []%v\n", name, schema.Items.GoType()))
+ return tBuf.String()
+}
diff --git a/encode/encoder.go b/encode/encoder.go
new file mode 100644
index 0000000..6638dbc
--- /dev/null
+++ b/encode/encoder.go
@@ -0,0 +1,43 @@
+package encode // import "udico.de/uditaren/opier/encode"
+import (
+ "strings"
+ "unicode"
+)
+
+type Encoder struct {
+ Package string
+}
+
+func NewEncoder(pkg string) *Encoder {
+ return &Encoder{
+ Package: pkg,
+ }
+}
+
+// make
+func NormalizeName(aName string) string {
+ tRet := &strings.Builder{}
+ capitalizeNext := true
+ for _, rune := range aName {
+ if capitalizeNext {
+ tRet.WriteRune(unicode.ToUpper(rune))
+ capitalizeNext = false
+ } else {
+ if rune == '-' {
+ capitalizeNext = true
+ } else {
+ tRet.WriteRune(rune)
+ }
+ }
+ }
+ return tRet.String()
+}
+
+
+func (e Encoder) GeneratedHeader() string {
+ return`/***********************************************
+ *** This is a GENERATED file - Do not edit! ***
+ ***********************************************/
+
+`
+}
\ No newline at end of file
diff --git a/encode/enum.go b/encode/enum.go
new file mode 100644
index 0000000..1627c84
--- /dev/null
+++ b/encode/enum.go
@@ -0,0 +1,40 @@
+package encode // import "udico.de/uditaren/opier/encode"
+import (
+ "bytes"
+ "fmt"
+ "strings"
+ "udico.de/opier/openapi"
+)
+
+func (e Encoder) Enum(name string, schema openapi.Schema) string {
+ tBuf := bytes.Buffer{}
+ tBuf.WriteString(fmt.Sprintf("package %v\n\n", e.Package))
+ tBuf.WriteString(e.GeneratedHeader())
+
+ if schema.Description != "" {
+ tDesc := strings.Split(strings.TrimSpace(schema.Description), "\n")
+ for _, tLine := range tDesc {
+ tBuf.WriteString(fmt.Sprintf("// %v\n", tLine))
+ }
+ }
+ tBuf.WriteString(fmt.Sprintf("type %v %v\n\n", name, schema.Type))
+ tBuf.WriteString(fmt.Sprintf("const (\n"))
+
+ firstRow := true
+ tNames, tLen := schema.EnumNames()
+ tLenName := len(name)
+ for k, v := range schema.Enum {
+ value := v
+ if schema.Type == "string" {
+ value = fmt.Sprintf("\"%v\"", v)
+ }
+ if firstRow {
+ tBuf.WriteString(fmt.Sprintf(" %[2]v_%-[4]*[1]v %v = %v\n", tNames[k], name, value, tLen))
+ firstRow = false
+ } else {
+ tBuf.WriteString(fmt.Sprintf(" %[2]v_%-[4]*[1]v %[5]*[6]v = %[3]v\n", tNames[k], name, value, tLen, tLenName, ""))
+ }
+ }
+ tBuf.WriteString(fmt.Sprintf(")\n"))
+ return tBuf.String()
+}
diff --git a/encode/object.go b/encode/object.go
new file mode 100644
index 0000000..3386535
--- /dev/null
+++ b/encode/object.go
@@ -0,0 +1,38 @@
+package encode // import "udico.de/uditaren/opier/encode"
+import (
+ "bytes"
+ "fmt"
+ "strings"
+ "udico.de/opier/openapi"
+)
+
+func (e Encoder) Object(name string, schema openapi.Schema) string {
+
+ tBuf := bytes.Buffer{}
+ tBuf.WriteString(fmt.Sprintf("package %v\n\n", e.Package))
+ tBuf.WriteString(e.GeneratedHeader())
+
+ if schema.Description != "" {
+ tDesc := strings.Split(strings.TrimSpace(schema.Description), "\n")
+ for _, tLine := range tDesc {
+ tBuf.WriteString(fmt.Sprintf("// %v\n", tLine))
+ }
+ }
+ tBuf.WriteString(fmt.Sprintf("type %v struct {\n", name))
+
+ for k, v := range schema.Properties {
+ tName := NormalizeName(k)
+ if v.Description != "" {
+ tDesc := strings.Split(strings.TrimSpace(v.Description), "\n")
+ tBuf.WriteString(fmt.Sprintf("\n")) // just a newline before commented fields
+ for _, tLine := range tDesc {
+ tBuf.WriteString(fmt.Sprintf(" // %v\n", tLine))
+ }
+ }
+ tBuf.WriteString(fmt.Sprintf(" %v %v `json:\"%v\"`\n", tName, v.GoType(), k))
+ }
+
+ tBuf.WriteString(fmt.Sprintf("}\n"))
+
+ return tBuf.String()
+}
diff --git a/go.mod b/go.mod
index a5615e8..85f8d21 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,10 @@
module udico.de/opier
go 1.14
+
+require (
+ github.com/sirupsen/logrus v1.6.0
+ github.com/spf13/cobra v1.0.0
+ gopkg.in/yaml.v2 v2.3.0
+ gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..c8858c3
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,137 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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diff --git a/openapi/openapi.go b/openapi/openapi.go
new file mode 100644
index 0000000..cda20fc
--- /dev/null
+++ b/openapi/openapi.go
@@ -0,0 +1,261 @@
+package openapi // import "udico.de/uditaren/opier/openapi"
+import (
+ "fmt"
+ "gopkg.in/yaml.v3"
+ "os"
+ "strings"
+ "unicode"
+)
+
+type OpenAPI struct {
+ Version string `yaml:"openapi"`
+ Info struct {
+ Title string
+ Version string
+ Description string
+ }
+ Paths map[string]*PathItem `yaml:"paths"`
+
+ Components *Components
+}
+
+func Load(fname string) (*OpenAPI, error) {
+ f, err := os.Open(fname)
+ if err != nil {
+ return nil, err
+ }
+ tRet := &OpenAPI{}
+ tY := yaml.NewDecoder(f)
+ err = tY.Decode(tRet)
+ return tRet, err
+}
+
+// PathItem Describes the operations available on a single path. A Path Item MAY be empty, due to ACL constraints.
+// The path itself is still exposed to the documentation viewer but they will not know which operations and parameters
+// are available.
+type PathItem struct {
+
+ // Allows for an external definition of this path item. The referenced structure MUST be in the format of a
+ // PathItem Object. In case a PathItem Object field appears both in the defined object and the referenced object,
+ // the behavior is undefined.
+ Ref string `yaml:"$ref"`
+
+ // An optional, string summary, intended to apply to all operations in this path.
+ Summary string
+
+ // An optional, string description, intended to apply to all operations in this path. CommonMark syntax MAY be
+ // used for rich text representation.
+ Description string
+
+ Get *Operation
+ Put *Operation
+ Post *Operation
+ Delete *Operation
+ Options *Operation
+ Head *Operation
+ Patch *Operation
+ Trace *Operation
+}
+
+func (p PathItem) Operations() map[string]*Operation {
+ tRet := make(map[string]*Operation)
+ if p.Get != nil {
+ tRet["get"] = p.Get
+ }
+ if p.Put != nil {
+ tRet["put"] = p.Put
+ }
+ if p.Post != nil {
+ tRet["post"] = p.Post
+ }
+ if p.Delete != nil {
+ tRet["delete"] = p.Delete
+ }
+ if p.Options != nil {
+ tRet["options"] = p.Options
+ }
+ if p.Head != nil {
+ tRet["head"] = p.Head
+ }
+ if p.Patch != nil {
+ tRet["patch"] = p.Patch
+ }
+ if p.Trace != nil {
+ tRet["trace"] = p.Trace
+ }
+ return tRet
+}
+
+// Operation describes a single API operation on a path.
+type Operation struct {
+ // A list of tags for API documentation control. Tags can be used for logical grouping of operations
+ // by resources or any other qualifier.
+ Tags []string
+
+ // A short summary of what the operation does.
+ Summary string
+
+ // A verbose explanation of the operation behavior. CommonMark syntax MAY be used for rich text representation.
+ Description string
+
+ // Additional external documentation for this operation.
+ //externalDocs
+
+ // Unique string used to identify the operation. The id MUST be unique among all operations described in the API.
+ // The operationId value is case-sensitive. Tools and libraries MAY use the operationId to uniquely identify an
+ // operation, therefore, it is RECOMMENDED to follow common programming naming conventions.
+ OperationId string `yaml:"operationId"`
+
+ //Parameters [] ...
+ // requestBodyesObject // required
+ // callba
+ // Responses Responscks
+ Deprecated bool
+
+ // A declaration of which security mechanisms can be used for this operation.
+ // The list of values includes alternative security requirement objects that can be used. Only one of the security
+ // requirement objects need to be satisfied to authorize a request. To make security optional, an empty security
+ // requirement ({}) can be included in the array. This definition overrides any declared top-level security.
+ // To remove a top-level security declaration, an empty array can be used.
+ Security []map[string][]string `yaml:"security"`
+
+ // An alternative server array to service this operation. If an alternative server object is specified at the Path
+ // Item Object or Root level, it will be overridden by this value.
+ // Servers
+}
+
+type ResponsesObject struct {
+ // ...
+}
+
+type Components struct {
+ //SecuritySchemas
+ //Responses map[string, ResponseObject]
+ Parameters map[string]Parameter
+ Schemas map[string]Schema
+}
+
+type ParameterLocation string
+
+const (
+ QUERY ParameterLocation = "query"
+ HEAD = "header"
+ PATH = "path"
+ COOKIE = "cookie"
+)
+
+type Parameter struct {
+
+ // only if this a reference object instead of a parameter obect
+ Ref string `yaml:"$ref"`
+
+ Name string
+ In ParameterLocation
+ Description string
+ Required bool
+ Deprecated bool
+ AllowEmptyValue bool `yaml:"allowEmptyValue"`
+
+ ///--- either
+
+ Style string
+ Explode bool
+ AllowReserved bool `yaml:"allowReserved"`
+ Schema *Schema
+ // example
+ // examples
+
+ ///--- or
+ Content map[string]*MediaType
+}
+
+type Schema struct {
+ // may be a schema reference:
+ Ref string `yaml:"$ref"`
+
+ Type string
+ // when type==array:
+ Items *Schema
+ // when type==object
+ Properties map[string]*Schema
+
+ Format string
+ Minimum int
+ Maximum int
+ Default interface{}
+
+ Enum []interface{}
+ XEnumVarnames []string `yaml:"x-enum-varnames"`
+
+ Required []string
+ Description string
+}
+
+func (s Schema) TypeOrReference() string {
+ if s.Ref != "" {
+ return s.Ref
+ }
+ return s.Type
+}
+
+func (s Schema) GoType() string {
+ tRet := s.Type
+ if s.Ref != "" {
+ idx := strings.LastIndex(s.Ref, "/")
+ tRet = "*" + s.Ref[idx+1:]
+ } else {
+ switch s.Type {
+ case "integer":
+ tRet = "int"
+ case "boolean":
+ tRet = "bool"
+ case "array":
+ tRet = fmt.Sprintf("[]%v", s.Items.GoType())
+ }
+ }
+ return tRet
+}
+
+// EnumNames returns the String representations for this enums values and the length of the longest name as well.
+func (s Schema) EnumNames() ([]string, int) {
+ tLen := 0
+ tRet := make([]string, len(s.Enum), len(s.Enum))
+ for k, v := range s.Enum {
+ tName := NormalizeName(fmt.Sprintf("%v", v))
+ if len(s.XEnumVarnames) == len(s.Enum) {
+ // read the desired enum name instead
+ tName = s.XEnumVarnames[k]
+ }
+ tRet[k] = tName
+ if len(tName) > tLen {
+ tLen = len(tName)
+ }
+ }
+ return tRet, tLen
+}
+
+type Referencable interface {
+
+}
+
+type MediaType struct {
+
+}
+
+func NormalizeName(aName string) string {
+ tRet := &strings.Builder{}
+ capitalizeNext := true
+ for _, rune := range aName {
+ if capitalizeNext {
+ tRet.WriteRune(unicode.ToUpper(rune))
+ capitalizeNext = false
+ } else {
+ if rune == '-' {
+ capitalizeNext = true
+ } else {
+ tRet.WriteRune(rune)
+ }
+ }
+ }
+ return tRet.String()
+}
diff --git a/opier.go b/opier.go
new file mode 100644
index 0000000..7a713f8
--- /dev/null
+++ b/opier.go
@@ -0,0 +1,10 @@
+package main // import "udico.de/uditaren/opier"
+
+
+import (
+ "udico.de/opier/cmd"
+)
+
+func main() {
+ cmd.Execute()
+}