233 lines
7.7 KiB
Go
233 lines
7.7 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"strings"
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"github.com/alexflint/go-arg"
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"go.wit.com/lib/gui/shell"
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"go.wit.com/log"
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)
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// sent via -ldflags
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var VERSION string
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var BUILDTIME string
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func main() {
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pp := arg.MustParse(&argv)
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// you need a proto file
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if argv.Proto == "" {
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log.Info("you must provide --proto <filename>")
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os.Exit(-1)
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}
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if !shell.Exists(argv.Proto) {
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log.Info("protobuf", argv.Proto, "is missing")
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if !argv.DryRun {
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os.Exit(-1)
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}
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}
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if !strings.HasSuffix(argv.Proto, ".proto") {
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log.Info("protobuf", argv.Proto, "must end in .proto")
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os.Exit(-1)
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}
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// you need --upbase and --lobase
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if argv.UpBase == "" {
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pp.WriteHelp(os.Stdout)
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os.Exit(-1)
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}
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cmd := []string{"go", "list", "-f", "'{{.Name}}'"}
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result := shell.Run(cmd)
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packageName := strings.Join(result.Stdout, "\n")
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packageName = strings.TrimSpace(packageName)
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packageName = strings.Trim(packageName, "'")
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log.Info("packageName == ", packageName)
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protobase := strings.TrimSuffix(argv.Proto, ".proto")
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sortmap := make(map[string]string)
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sortmap["package"] = packageName
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sortmap["protobase"] = protobase
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sortmap["base"] = argv.LoBase
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sortmap["lock"] = sortmap["base"] + "slock"
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sortmap["Base"] = argv.UpBase
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sortmap["Bases"] = sortmap["Base"] + "s"
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sortparts := strings.Split(argv.Sort[0], ",")
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sortmap["sortBy"] = sortparts[0]
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sortmap["sortKey"] = sortparts[1]
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if argv.DryRun {
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for k, v := range sortmap {
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log.Info(k, "=", v)
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}
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os.Exit(0)
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}
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f, _ := os.OpenFile(protobase+".sort.pb.go", os.O_WRONLY|os.O_CREATE, 0600)
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header(f, sortmap)
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syncLock(f, sortmap)
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iterTop(f, sortmap)
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iterNext(f, sortmap)
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iterSort(f, sortmap)
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iterAppend(f, sortmap)
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iterEnd(f, sortmap)
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if argv.NoMarshal {
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log.Info("not making marshal.pb.go file (--no-marshal == true)")
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} else {
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// make the foo.marshal.pb.go file
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marshal(sortmap)
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}
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}
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func headerComment(w io.Writer) {
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// this file was autogenerated with autogenpb")
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fmt.Fprintln(w, "//")
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fmt.Fprintln(w, "// you might be able to use it on simple, strictly defined protobuf files")
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fmt.Fprintln(w, "//")
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fmt.Fprintln(w, "// go install go.wit.com/apps/autogenpb@latest")
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fmt.Fprintln(w, "")
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}
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func header(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "package "+names["package"])
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headerComment(w)
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fmt.Fprintln(w, "import (")
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fmt.Fprintln(w, " \"fmt\"")
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fmt.Fprintln(w, " \"os\"")
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fmt.Fprintln(w, " \"sort\"")
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fmt.Fprintln(w, " \"sync\"")
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fmt.Fprintln(w, ")")
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fmt.Fprintln(w, "")
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}
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func syncLock(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "// bad global lock until I figure out some other plan")
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fmt.Fprintln(w, "var "+names["lock"]+" sync.RWMutex")
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fmt.Fprintln(w, "")
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}
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func iterTop(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "type "+names["Base"]+"Iterator struct {")
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fmt.Fprintln(w, " sync.RWMutex")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " packs []*"+names["Base"])
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fmt.Fprintln(w, " index int")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// New"+names["Base"]+"Iterator initializes a new iterator.")
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fmt.Fprintln(w, "func New"+names["Base"]+"Iterator(packs []*"+names["Base"]+") *"+names["Base"]+"Iterator {")
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fmt.Fprintln(w, " return &"+names["Base"]+"Iterator{packs: packs}")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// Scan moves to the next element and returns false if there are no more packs.")
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fmt.Fprintln(w, "// Use Scan() in a loop, similar to a while loop")
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fmt.Fprintln(w, "//")
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fmt.Fprintln(w, "// for iterator.Scan() ")
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fmt.Fprintln(w, "// d := iterator.Next(")
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fmt.Fprintln(w, "// fmt.Println(\"found UUID:\", d.Uuid")
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fmt.Fprintln(w, "// }")
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fmt.Fprintln(w, "func (it *"+names["Base"]+"Iterator) Scan() bool {")
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fmt.Fprintln(w, " if it.index >= len(it.packs) {")
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fmt.Fprintln(w, " return false")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " it.index++")
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fmt.Fprintln(w, " return true")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func iterNext(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "// Next() returns the next thing in the array")
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fmt.Fprintln(w, "func (it *"+names["Base"]+"Iterator) Next() *"+names["Base"]+" {")
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fmt.Fprintln(w, " if it.packs[it.index-1] == nil {")
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fmt.Fprintln(w, " for i, d := range it.packs {")
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fmt.Fprintln(w, " fmt.Println(\"i =\", i, d)")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " fmt.Println(\"protobuf autogenpb sort error len =\", len(it.packs))")
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fmt.Fprintln(w, " fmt.Println(\"protobuf autogenpb sort error next == nil\", it.index, it.index-1)")
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fmt.Fprintln(w, " os.Exit(-1)")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " return it.packs[it.index-1]")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func iterSort(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "func (all *"+names["Bases"]+") All() *"+names["Base"]+"Iterator {")
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fmt.Fprintln(w, " "+names["base"]+"Pointers := all.selectAll"+names["Base"]+"()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " iterator := New"+names["Base"]+"Iterator("+names["base"]+"Pointers)")
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fmt.Fprintln(w, " return iterator")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "func (all *"+names["Bases"]+") Sort"+names["sortBy"]+"() *"+names["Base"]+"Iterator {")
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fmt.Fprintln(w, " packs := all.selectAll"+names["Base"]+"()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " sort.Sort("+names["Base"]+""+names["sortBy"]+"(packs))")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " iterator := New"+names["Base"]+"Iterator(packs)")
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fmt.Fprintln(w, " return iterator")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "func (all *"+names["Bases"]+") Len() int {")
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fmt.Fprintln(w, " "+names["lock"]+".RLock()")
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fmt.Fprintln(w, " defer "+names["lock"]+".RUnlock()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " return len(all."+names["Bases"]+")")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func iterEnd(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "type "+names["Base"]+""+names["sortBy"]+" []*"+names["Base"]+"")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Len() int { return len(a) }")
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fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Less(i, j int) bool { return a[i]."+names["sortKey"]+" < a[j]."+names["sortKey"]+" }")
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fmt.Fprintln(w, "func (a "+names["Base"]+""+names["sortBy"]+") Swap(i, j int) { a[i], a[j] = a[j], a[i] }")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, "// safely returns a slice of pointers to the "+names["Base"]+" protobufs")
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fmt.Fprintln(w, "func (all *"+names["Bases"]+") selectAll"+names["Base"]+"() []*"+names["Base"]+" {")
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fmt.Fprintln(w, " "+names["lock"]+".RLock()")
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fmt.Fprintln(w, " defer "+names["lock"]+".RUnlock()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " // Create a new slice to hold pointers to each "+names["Base"]+"")
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fmt.Fprintln(w, " var aStuff []*"+names["Base"]+"")
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fmt.Fprintln(w, " aStuff = make([]*"+names["Base"]+", len(all."+names["Bases"]+"))")
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fmt.Fprintln(w, " for i, p := range all."+names["Bases"]+" {")
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fmt.Fprintln(w, " aStuff[i] = p // Copy pointers for safe iteration")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " return aStuff")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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func iterAppend(w io.Writer, names map[string]string) {
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fmt.Fprintln(w, "// enforces no duplicate Refname names")
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fmt.Fprintln(w, "func (all *"+names["Bases"]+") Append(newP *"+names["Base"]+") bool {")
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fmt.Fprintln(w, " "+names["lock"]+".Lock()")
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fmt.Fprintln(w, " defer "+names["lock"]+".Unlock()")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " for _, p := range all."+names["Bases"]+" {")
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fmt.Fprintln(w, " if p.Refname == newP.Refname {")
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fmt.Fprintln(w, " return false")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, " }")
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fmt.Fprintln(w, "")
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fmt.Fprintln(w, " all."+names["Bases"]+" = append(all."+names["Bases"]+", newP)")
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fmt.Fprintln(w, " return true")
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fmt.Fprintln(w, "}")
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fmt.Fprintln(w, "")
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}
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