GoToSocial/internal/config/gen/gen.go
2022-10-29 17:14:57 +02:00

114 lines
4.3 KiB
Go

/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"flag"
"fmt"
"os"
"os/exec"
"reflect"
"github.com/superseriousbusiness/gotosocial/internal/config"
)
const license = `/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
`
func main() {
var (
out string
gen string
)
// Load runtime config flags
flag.StringVar(&out, "out", "", "Generated file output path")
flag.StringVar(&gen, "gen", "helpers", "Type of file to generate (helpers)")
flag.Parse()
// Open output file path
output, err := os.OpenFile(out, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o644)
if err != nil {
panic(err)
}
switch gen {
// Generate config field helper methods
case "helpers":
fmt.Fprint(output, "// THIS IS A GENERATED FILE, DO NOT EDIT BY HAND\n")
fmt.Fprint(output, license)
fmt.Fprint(output, "package config\n\n")
fmt.Fprint(output, "import \"codeberg.org/gruf/go-bytesize\"\n\n")
t := reflect.TypeOf(config.Configuration{})
for i := 0; i < t.NumField(); i++ {
field := t.Field(i)
// ConfigState structure helper methods
fmt.Fprintf(output, "// Get%s safely fetches the Configuration value for state's '%s' field\n", field.Name, field.Name)
fmt.Fprintf(output, "func (st *ConfigState) Get%s() (v %s) {\n", field.Name, field.Type.String())
fmt.Fprintf(output, "\tst.mutex.Lock()\n")
fmt.Fprintf(output, "\tv = st.config.%s\n", field.Name)
fmt.Fprintf(output, "\tst.mutex.Unlock()\n")
fmt.Fprintf(output, "\treturn\n")
fmt.Fprintf(output, "}\n\n")
fmt.Fprintf(output, "// Set%s safely sets the Configuration value for state's '%s' field\n", field.Name, field.Name)
fmt.Fprintf(output, "func (st *ConfigState) Set%s(v %s) {\n", field.Name, field.Type.String())
fmt.Fprintf(output, "\tst.mutex.Lock()\n")
fmt.Fprintf(output, "\tdefer st.mutex.Unlock()\n")
fmt.Fprintf(output, "\tst.config.%s = v\n", field.Name)
fmt.Fprintf(output, "\tst.reloadToViper()\n")
fmt.Fprintf(output, "}\n\n")
// Global ConfigState helper methods
// TODO: remove when we pass around a ConfigState{}
fmt.Fprintf(output, "// %sFlag returns the flag name for the '%s' field\n", field.Name, field.Name)
fmt.Fprintf(output, "func %sFlag() string { return \"%s\" }\n\n", field.Name, field.Tag.Get("name"))
fmt.Fprintf(output, "// Get%s safely fetches the value for global configuration '%s' field\n", field.Name, field.Name)
fmt.Fprintf(output, "func Get%[1]s() %[2]s { return global.Get%[1]s() }\n\n", field.Name, field.Type.String())
fmt.Fprintf(output, "// Set%s safely sets the value for global configuration '%s' field\n", field.Name, field.Name)
fmt.Fprintf(output, "func Set%[1]s(v %[2]s) { global.Set%[1]s(v) }\n\n", field.Name, field.Type.String())
}
_ = output.Close()
_ = exec.Command("gofumports", "-w", out).Run()
// The plain here is that eventually we might be able
// to generate an example configuration from struct tags
// Unknown type
default:
panic("unknown generation type: " + gen)
}
}