/
main.go
160 lines (141 loc) · 3.52 KB
/
main.go
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// Generates actionutil/githubapi.go
package main
import (
"fmt"
"go/types"
"log"
"os"
"path/filepath"
"regexp"
"strings"
"github.com/posener/autogen"
"golang.org/x/tools/go/loader"
)
//go:generate go run .
type fn struct {
Field *types.Var
Method *types.Func
}
func (f fn) Params() []*types.Var {
var vars []*types.Var
params := f.Method.Type().(*types.Signature).Params()
for i := 0; i < params.Len(); i++ {
vars = append(vars, params.At(i))
}
return vars
}
func (f fn) Results() []*types.Var {
var vars []*types.Var
results := f.Method.Type().(*types.Signature).Results()
for i := 0; i < results.Len(); i++ {
vars = append(vars, results.At(i))
}
return vars
}
func (f fn) OtherParamsDefinition() string {
others := f.Params()[3:]
var params []string
for _, other := range others {
params = append(params, fmt.Sprintf("%s %s", other.Name(), cleanTypeName(other.Type())))
}
return strings.Join(params, ", ")
}
func (f fn) OtherParamsUse() string {
others := f.Params()[3:]
var params []string
for _, other := range others {
params = append(params, other.Name())
}
return strings.Join(params, ", ")
}
func (f fn) ResultsDefinition() string {
var params []string
for _, other := range f.Results() {
params = append(params, fmt.Sprintf("%s %s", other.Name(), cleanTypeName(other.Type())))
}
ret := strings.Join(params, ", ")
if len(params) > 1 {
ret = "(" + ret + ")"
}
return ret
}
func (f fn) isValid() bool {
params := f.Params()
return len(params) >= 2 &&
params[0].Name() == "ctx" &&
params[1].Name() == "owner" &&
params[2].Name() == "repo"
}
func cleanTypeName(tp types.Type) string {
name := tp.String()
if i := strings.LastIndex(name, "/"); i >= 0 {
prefix := regexp.MustCompile(`^[\[\]\*]*`).FindString(name)
name = prefix + name[i+1:]
}
return name
}
func main() {
log.SetFlags(log.Lshortfile)
// Load the github program.
conf := loader.Config{AllowErrors: true}
conf.Import("github.com/google/go-github/v31/github")
stderr := os.Stderr
os.Stderr, _ = os.Open(os.DevNull)
program, err := conf.Load()
os.Stderr.Close()
os.Stderr = stderr
if err != nil {
log.Fatal(err)
}
// Get github package.
var pkg *types.Package
for pkg = range program.AllPackages {
if pkg.Name() == "github" {
break
}
}
if pkg == nil {
log.Fatal("Package github was not found.")
}
// Get `type Client struct`:
client := pkg.Scope().Lookup("Client").Type().Underlying().(*types.Struct)
var funcs []fn
// Iterate Client fields and collect the services.
for i := 0; i < client.NumFields(); i++ {
field := client.Field(i)
if !field.Exported() {
continue
}
// The field is a pointer to a struct, get the pointer.
fieldPointer, ok := field.Type().Underlying().Underlying().(*types.Pointer)
if !ok {
continue
}
// The pointer points on a struct that ends with the "Service" suffix.
fieldType, ok := fieldPointer.Elem().(*types.Named)
if !ok {
continue
}
if !strings.HasSuffix(fieldType.Obj().Name(), "Service") {
continue
}
// Iterate over the field type methods.
for j := 0; j < fieldType.NumMethods(); j++ {
f := fn{Field: field, Method: fieldType.Method(j)}
if !f.isValid() {
continue
}
// Skip Repositories.GetArchiveLink: https://github.com/google/go-github/issues/1533.
if f.Field.Name() == "Repositories" && f.Method.Name() == "GetArchiveLink" {
continue
}
funcs = append(funcs, f)
}
}
err = autogen.Execute(
funcs,
autogen.Location(filepath.Join(autogen.ModulePath, "actionutil")))
if err != nil {
log.Fatal(err)
}
}