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146 lines (126 loc) · 4.38 KB
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//go:build ignore
// +build ignore
//go:generate go run gen.go
package main
import (
"context"
"fmt"
"io/fs"
"os"
"path/filepath"
"sort"
"cuelang.org/go/cue/errors"
"github.com/grafana/codejen"
"github.com/grafana/grafana/pkg/codegen"
"github.com/grafana/grafana/pkg/cuectx"
"github.com/grafana/grafana/pkg/kindsys"
)
func main() {
if len(os.Args) > 1 {
fmt.Fprintf(os.Stderr, "plugin thema code generator does not currently accept any arguments\n, got %q", os.Args)
os.Exit(1)
}
// Core kinds composite code generator. Produces all generated code in
// grafana/grafana that derives from raw and structured core kinds.
coreKindsGen := codejen.JennyListWithNamer(func(decl *codegen.DeclForGen) string {
return decl.Properties.Common().MachineName
})
// All the jennies that comprise the core kinds generator pipeline
coreKindsGen.Append(
codegen.LatestJenny(kindsys.GoCoreKindParentPath, codegen.GoTypesJenny{}),
codegen.CoreStructuredKindJenny(kindsys.GoCoreKindParentPath, nil),
codegen.RawKindJenny(kindsys.GoCoreKindParentPath, nil),
codegen.BaseCoreRegistryJenny(filepath.Join("pkg", "registry", "corekind"), kindsys.GoCoreKindParentPath),
codegen.LatestMajorsOrXJenny(kindsys.TSCoreKindParentPath, codegen.TSTypesJenny{}),
codegen.TSVeneerIndexJenny(filepath.Join("packages", "grafana-schema", "src")),
)
coreKindsGen.AddPostprocessors(codegen.SlashHeaderMapper("kinds/gen.go"))
cwd, err := os.Getwd()
if err != nil {
fmt.Fprintf(os.Stderr, "could not get working directory: %s", err)
os.Exit(1)
}
groot := filepath.Dir(cwd)
rt := cuectx.GrafanaThemaRuntime()
var all []*codegen.DeclForGen
// structured kinddirs first
f := os.DirFS(filepath.Join(groot, kindsys.CoreStructuredDeclParentPath))
kinddirs := elsedie(fs.ReadDir(f, "."))("error reading structured fs root directory")
for _, ent := range kinddirs {
if !ent.IsDir() {
continue
}
rel := filepath.Join(kindsys.CoreStructuredDeclParentPath, ent.Name())
decl, err := kindsys.LoadCoreKind[kindsys.CoreStructuredProperties](rel, rt.Context(), nil)
if err != nil {
die(fmt.Errorf("%s is not a valid kind: %s", rel, errors.Details(err, nil)))
}
if decl.Properties.MachineName != ent.Name() {
die(fmt.Errorf("%s: kind's machine name (%s) must equal parent dir name (%s)", rel, decl.Properties.Name, ent.Name()))
}
all = append(all, elsedie(codegen.ForGen(rt, decl.Some()))(rel))
}
// now raw kinddirs
f = os.DirFS(filepath.Join(groot, kindsys.RawDeclParentPath))
kinddirs = elsedie(fs.ReadDir(f, "."))("error reading raw fs root directory")
for _, ent := range kinddirs {
if !ent.IsDir() {
continue
}
rel := filepath.Join(kindsys.RawDeclParentPath, ent.Name())
decl, err := kindsys.LoadCoreKind[kindsys.RawProperties](rel, rt.Context(), nil)
if err != nil {
die(fmt.Errorf("%s is not a valid kind: %s", rel, errors.Details(err, nil)))
}
if decl.Properties.MachineName != ent.Name() {
die(fmt.Errorf("%s: kind's machine name (%s) must equal parent dir name (%s)", rel, decl.Properties.Name, ent.Name()))
}
dfg, _ := codegen.ForGen(nil, decl.Some())
all = append(all, dfg)
}
sort.Slice(all, func(i, j int) bool {
return nameFor(all[i].Properties) < nameFor(all[j].Properties)
})
jfs, err := coreKindsGen.GenerateFS(all...)
if err != nil {
die(fmt.Errorf("core kinddirs codegen failed: %w", err))
}
if _, set := os.LookupEnv("CODEGEN_VERIFY"); set {
if err = jfs.Verify(context.Background(), groot); err != nil {
die(fmt.Errorf("generated code is out of sync with inputs:\n%s\nrun `make gen-cue` to regenerate", err))
}
} else if err = jfs.Write(context.Background(), groot); err != nil {
die(fmt.Errorf("error while writing generated code to disk:\n%s", err))
}
}
func nameFor(m kindsys.SomeKindProperties) string {
switch x := m.(type) {
case kindsys.RawProperties:
return x.Name
case kindsys.CoreStructuredProperties:
return x.Name
case kindsys.CustomStructuredProperties:
return x.Name
case kindsys.ComposableProperties:
return x.Name
default:
// unreachable so long as all the possibilities in KindProperties have switch branches
panic("unreachable")
}
}
func elsedie[T any](t T, err error) func(msg string) T {
if err != nil {
return func(msg string) T {
fmt.Fprintf(os.Stderr, "%s: %s\n", msg, err)
os.Exit(1)
return t
}
}
return func(msg string) T {
return t
}
}
func die(err error) {
fmt.Fprint(os.Stderr, err, "\n")
os.Exit(1)
}