add gogenproto generate package (#14)

### Background

→ I want to be able to generate specific protos relative to a specific
path.

### Changes

- new gogenproto generator based on the script I keep copying around.

### Testing

- added duh

go.work

@@ -5,6 +5,8 @@ use (
 	./gencommon
 	./genum
 	./gerror
+	./gogenproto
+	./gogenproto/internal
 	./gsort
 	./gsync
 	./log

go.work.sum

@@ -1,6 +1,4 @@
-github.com/drshriveer/gtools/gencommon v0.0.0-20230921080944-8f1b8f9e43fd/go.mod h1:ER4mobl8fvlqt9fpQSph/LpbiPyNfmR+4QszQrJgcZg=
-github.com/drshriveer/gtools/rutils v0.0.0-20230921080944-8f1b8f9e43fd/go.mod h1:ixRN41tPraNiLhfegjbhtt9zFLW8XXhZxUlmSaGGU3w=
-github.com/drshriveer/gtools/set v0.0.0-20230921080944-8f1b8f9e43fd/go.mod h1:oKjRVsjkkR+xeL/D3IqO/QrSSibcoXYuDapbc46LQyA=
+github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c=

gogenproto/cmd/gogenproto/main.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"os"
+
+	"github.com/itzg/go-flagsfiller"
+
+	"github.com/drshriveer/gtools/gogenproto/gen"
+)
+
+func main() {
+	g := gen.Generate{}
+	filler := flagsfiller.New()
+	if err := filler.Fill(flag.CommandLine, &g); err != nil {
+		gen.Logger.Fatal(err)
+	}
+	flag.Parse()
+
+	for _, s := range os.Environ() {
+		println("env: " + s)
+	}
+
+	if err := g.Run(); err != nil {
+		log.Fatalf("run failed: %+v", err)
+	}
+}

gogenproto/gen/generate.go

@@ -0,0 +1,65 @@
+package gen
+
+import (
+	"io/fs"
+	"log"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+// Logger is the name-spaced logger for this script.
+// It is exposed for use in the main package.
+var Logger = log.New(log.Writer(), "[gogenproto] ", log.LstdFlags)
+
+// Generate is a simple script for generating proto files with a go:generate directive
+// relative to the input directory.
+type Generate struct {
+	InputDir  string `alias:"inputDir" env:"PWD" usage:"path to root directory for proto generation"`
+	OutputDir string `alias:"outputDir" default:"../" usage:"relative output path for generated files"`
+	// TODO: other flags, like VTProto, GRPC, TS, etc,
+}
+
+// Run runs the generate command.
+func (g Generate) Run() error {
+	paths, err := g.findProtos()
+	if err != nil {
+		return err
+	}
+	args := []string{
+		"--proto_path=" + path.Dir(g.InputDir),
+		"--go_out=" + g.OutputDir,
+		"--fatal_warnings",
+	}
+	args = append(args, paths...)
+	cmd := exec.Command("protoc", args...)
+	cmd.Stdout = logPipe{}
+	cmd.Stderr = logPipe{}
+	return cmd.Run()
+}
+
+func (g Generate) findProtos() ([]string, error) {
+	protoList := []string{}
+	err := filepath.WalkDir(g.InputDir,
+		func(pathname string, d fs.DirEntry, err error) error {
+			if err != nil || pathname == "." {
+				return err
+			} else if d.Type().IsRegular() {
+				if filepath.Ext(d.Name()) == ".proto" {
+					protoList = append(protoList, pathname)
+				}
+			}
+			return nil
+		},
+	)
+	return protoList, err
+}
+
+type logPipe struct{}
+
+func (lw logPipe) Write(p []byte) (n int, err error) {
+	toLog := strings.TrimSuffix(string(p), "\n")
+	Logger.Println(toLog)
+	return len(p), nil
+}

gogenproto/go.mod

@@ -0,0 +1,10 @@
+module github.com/drshriveer/gtools/gogenproto
+
+go 1.21.1
+
+require github.com/itzg/go-flagsfiller v1.12.0
+
+require (
+	github.com/iancoleman/strcase v0.3.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
+)

gogenproto/go.sum

@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/iancoleman/strcase v0.3.0 h1:nTXanmYxhfFAMjZL34Ov6gkzEsSJZ5DbhxWjvSASxEI=
+github.com/iancoleman/strcase v0.3.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
+github.com/itzg/go-flagsfiller v1.12.0 h1:LSwSUGxzZqueprm0D8FBCAG0JMgwAkkh2UjtwreNgAg=
+github.com/itzg/go-flagsfiller v1.12.0/go.mod h1:47WeO9fl+QyS48AdRHfarhF3rKBh0enbe90tTko03gg=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

gogenproto/internal/gen_proto.go

@@ -0,0 +1,3 @@
+package internal
+
+//go:generate gogenproto

gogenproto/internal/gen_proto_test.go

@@ -0,0 +1,11 @@
+package internal
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGenProto(t *testing.T) {
+	assert.FileExistsf(t, "./test.pb.go", "you must run go generate for this test to work.")
+}

gogenproto/internal/go.mod

@@ -0,0 +1,15 @@
+module github.com/drshriveer/gtools/gogenproto/internal
+
+go 1.21
+
+require (
+	github.com/stretchr/testify v1.8.4
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0
+	google.golang.org/protobuf v1.31.0
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

gogenproto/internal/go.sum

@@ -0,0 +1,20 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0 h1:rNBFJjBCOgVr9pWD7rs/knKL4FRTKgpZmsRfV214zcA=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.3.0/go.mod h1:Dk1tviKTvMCz5tvh7t+fh94dhmQVHuCt2OzJB3CTW9Y=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=