92 lines
2 KiB
Go
92 lines
2 KiB
Go
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package main
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import (
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"bytes"
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"flag"
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"fmt"
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"go/format"
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"io/ioutil"
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"os"
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"unicode"
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"unicode/utf8"
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)
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type stringSet struct {
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values map[string]struct{}
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}
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func (s stringSet) String() string {
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return ""
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}
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func (s stringSet) Set(value string) error {
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s.values[value] = struct{}{}
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return nil
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}
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func (s stringSet) GetValues() map[string]struct{} {
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return s.values
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}
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var (
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typeName = flag.String("type", "", "interface type to generate plugin rpc proxy for")
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rpcName = flag.String("name", *typeName, "RPC name, set if different from type")
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inputFile = flag.String("i", "", "input file path")
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outputFile = flag.String("o", *inputFile+"_proxy.go", "output file path")
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skipFuncs map[string]struct{}
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flSkipFuncs = stringSet{make(map[string]struct{})}
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flBuildTags = stringSet{make(map[string]struct{})}
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)
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func errorOut(msg string, err error) {
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if err == nil {
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return
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}
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fmt.Fprintf(os.Stderr, "%s: %v\n", msg, err)
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os.Exit(1)
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}
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func checkFlags() error {
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if *outputFile == "" {
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return fmt.Errorf("missing required flag `-o`")
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}
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if *inputFile == "" {
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return fmt.Errorf("missing required flag `-i`")
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}
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return nil
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}
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func main() {
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flag.Var(flSkipFuncs, "skip", "skip parsing for function")
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flag.Var(flBuildTags, "tag", "build tags to add to generated files")
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flag.Parse()
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skipFuncs = flSkipFuncs.GetValues()
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errorOut("error", checkFlags())
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pkg, err := Parse(*inputFile, *typeName)
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errorOut(fmt.Sprintf("error parsing requested type %s", *typeName), err)
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var analysis = struct {
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InterfaceType string
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RPCName string
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BuildTags map[string]struct{}
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*parsedPkg
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}{toLower(*typeName), *rpcName, flBuildTags.GetValues(), pkg}
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var buf bytes.Buffer
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errorOut("parser error", generatedTempl.Execute(&buf, analysis))
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src, err := format.Source(buf.Bytes())
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errorOut("error formating generated source", err)
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errorOut("error writing file", ioutil.WriteFile(*outputFile, src, 0644))
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}
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func toLower(s string) string {
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if s == "" {
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return ""
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}
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r, n := utf8.DecodeRuneInString(s)
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return string(unicode.ToLower(r)) + s[n:]
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}
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