go-lemmy/cmd/gen/main.go

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package main
import (
"flag"
"io/fs"
"os"
"path/filepath"
"strconv"
"strings"
"go.arsenm.dev/go-lemmy/cmd/gen/generator"
"go.arsenm.dev/go-lemmy/cmd/gen/parser"
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"go.arsenm.dev/logger"
"go.arsenm.dev/logger/log"
)
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func init() {
log.Logger = logger.NewPretty(os.Stderr)
}
var implDirs = [...]string{
"crates/api_crud/src",
"crates/apub/src/api",
"crates/api/src",
}
var structDirs = [...]string{
"crates/api_common",
"crates/db_schema/src/source",
"crates/db_views_actor/src/structs.rs",
"crates/db_views/src/structs.rs",
"crates/db_views_moderator/src/structs.rs",
"crates/db_schema/src/aggregates/structs.rs",
"crates/db_schema/src/lib.rs",
"crates/websocket/src/lib.rs",
}
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const routesFile = "src/api_routes_http.rs"
func main() {
lemmyDir := flag.String("lemmy-dir", "lemmy", "Path to Lemmy repository")
outDir := flag.String("out-dir", "out", "Directory to write output in")
flag.Parse()
baseStructDir := filepath.Join(*outDir, "types")
sp := parser.NewStruct(nil)
sp.Skip = []string{"LemmyContext"}
for _, structDir := range structDirs {
dir := filepath.Join(*lemmyDir, structDir)
err := filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return nil
}
if d.IsDir() {
return nil
}
if filepath.Ext(path) != ".rs" {
return nil
}
name := d.Name()
if name == "context.rs" ||
name == "local_user_language.rs" ||
name == "chat_server.rs" {
return nil
}
fl, err := os.Open(path)
if err != nil {
return err
}
defer fl.Close()
sp.Reset(fl)
fileStructs, err := sp.Parse()
if err != nil {
return err
}
nameNoExt := strings.TrimSuffix(d.Name(), ".rs")
goFilePath := filepath.Join(baseStructDir, nameNoExt+".gen.go")
i := 1
_, err = os.Stat(goFilePath)
for err == nil {
goFilePath = filepath.Join(baseStructDir, nameNoExt+"."+strconv.Itoa(i)+".gen.go")
_, err = os.Stat(goFilePath)
i++
}
outFl, err := os.Create(goFilePath)
if err != nil {
return err
}
defer outFl.Close()
_, err = outFl.WriteString("// Source: " + path + "\n")
if err != nil {
return err
}
return generator.NewStruct(outFl, "types").Generate(fileStructs)
})
if err != nil {
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log.Fatal("Error walking directory while parsing structs").Err(err).Str("dir", dir).Send()
}
}
ip := parser.NewImpl(nil)
impls := map[string]string{}
for _, implDir := range implDirs {
dir := filepath.Join(*lemmyDir, implDir)
err := filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return nil
}
if d.IsDir() {
return nil
}
if filepath.Ext(path) != ".rs" {
return nil
}
fl, err := os.Open(path)
if err != nil {
return err
}
defer fl.Close()
ip.Reset(fl)
implMap, err := ip.Parse()
if err != nil {
return err
}
for reqStruct, resStruct := range implMap {
impls[reqStruct] = resStruct
}
return nil
})
if err != nil {
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log.Fatal("Error walking directory while parsing impls").Err(err).Str("dir", dir).Send()
}
}
routesPath := filepath.Join(*lemmyDir, routesFile)
rf, err := os.Open(routesPath)
if err != nil {
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log.Fatal("Error opening routes file").Err(err).Send()
}
defer rf.Close()
rp := parser.NewRoutes(rf)
routes, err := rp.Parse()
if err != nil {
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log.Fatal("Error parsing routes file").Err(err).Send()
}
orf, err := os.Create(filepath.Join(*outDir, "routes.gen.go"))
if err != nil {
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log.Fatal("Error creating routes output file").Err(err).Send()
}
defer orf.Close()
_, err = orf.WriteString("// Source: " + routesPath + "\n")
if err != nil {
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log.Fatal("Error writing source string to routes file").Err(err).Send()
}
err = generator.NewRoutes(orf, "lemmy").Generate(routes, impls)
if err != nil {
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log.Fatal("Error generating output routes file").Err(err).Send()
}
}