grafana/pkg/framework/coremodel/gen.go
2022-06-23 12:47:47 -07:00

101 lines
2.7 KiB
Go

// go:build ignore
//go:build ignore
// +build ignore
package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"cuelang.org/go/cue/cuecontext"
gcgen "github.com/grafana/grafana/pkg/codegen"
"github.com/grafana/thema"
)
var lib = thema.NewLibrary(cuecontext.New())
const sep = string(filepath.Separator)
// Generate Go and Typescript implementations for all coremodels, and populate the
// coremodel static registry.
func main() {
if len(os.Args) > 1 {
fmt.Fprintf(os.Stderr, "coremodel code generator does not currently accept any arguments\n, got %q", os.Args)
os.Exit(1)
}
cwd, err := os.Getwd()
if err != nil {
fmt.Fprintf(os.Stderr, "could not get working directory: %s", err)
os.Exit(1)
}
// TODO this binds us to only having coremodels in a single directory. If we need more, compgen is the way
grootp := strings.Split(cwd, sep)
groot := filepath.Join(sep, filepath.Join(grootp[:len(grootp)-3]...))
cmroot := filepath.Join(groot, "pkg", "coremodel")
tsroot := filepath.Join(groot, "packages", "grafana-schema", "src", "schema")
items, err := ioutil.ReadDir(cmroot)
if err != nil {
fmt.Fprintf(os.Stderr, "could not read coremodels parent dir %s: %s\n", cmroot, err)
os.Exit(1)
}
var lins []*gcgen.ExtractedLineage
for _, item := range items {
if item.IsDir() {
lin, err := gcgen.ExtractLineage(filepath.Join(cmroot, item.Name(), "coremodel.cue"), lib)
if err != nil {
fmt.Fprintf(os.Stderr, "could not process coremodel dir %s: %s\n", cmroot, err)
os.Exit(1)
}
lins = append(lins, lin)
}
}
wd := gcgen.NewWriteDiffer()
for _, ls := range lins {
gofiles, err := ls.GenerateGoCoremodel(filepath.Join(cmroot, ls.Lineage.Name()))
if err != nil {
fmt.Fprintf(os.Stderr, "failed to generate Go for %s: %s\n", ls.Lineage.Name(), err)
os.Exit(1)
}
wd.Merge(gofiles)
tsfiles, err := ls.GenerateTypescriptCoremodel(filepath.Join(tsroot, ls.Lineage.Name()))
if err != nil {
fmt.Fprintf(os.Stderr, "failed to generate TypeScript for %s: %s\n", ls.Lineage.Name(), err)
os.Exit(1)
}
wd.Merge(tsfiles)
}
regfiles, err := gcgen.GenerateCoremodelRegistry(filepath.Join(groot, "pkg", "framework", "coremodel", "registry", "registry_gen.go"), lins)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to generate coremodel registry: %s\n", err)
os.Exit(1)
}
wd.Merge(regfiles)
if _, set := os.LookupEnv("CODEGEN_VERIFY"); set {
err = wd.Verify()
if err != nil {
fmt.Fprintf(os.Stderr, "generated code is not up to date:\n%s\nrun `make gen-cue` to regenerate\n\n", err)
os.Exit(1)
}
} else {
err = wd.Write()
if err != nil {
fmt.Fprintf(os.Stderr, "error while writing generated code to disk:\n%s\n", err)
os.Exit(1)
}
}
}