/
generate_provider.go
201 lines (167 loc) · 5.37 KB
/
generate_provider.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package cmd
import (
"context"
"flag"
"fmt"
"log"
"log/slog"
"os"
"strings"
"github.com/hashicorp/terraform-plugin-codegen-spec/spec"
"github.com/mitchellh/cli"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/format"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/input"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/logging"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/output"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/provider_convert"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/schema"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/validate"
)
type GenerateProviderCommand struct {
UI cli.Ui
flagIRInputPath string
flagOutputPath string
flagPackageName string
}
func (cmd *GenerateProviderCommand) Flags() *flag.FlagSet {
fs := flag.NewFlagSet("generate provider", flag.ExitOnError)
fs.StringVar(&cmd.flagIRInputPath, "input", "./ir.json", "path to intermediate representation (JSON)")
fs.StringVar(&cmd.flagOutputPath, "output", "./output", "directory path to output generated code files")
fs.StringVar(&cmd.flagPackageName, "package", "", "name of Go package for generated code files")
return fs
}
func (cmd *GenerateProviderCommand) Help() string {
strBuilder := &strings.Builder{}
longestName := 0
longestUsage := 0
cmd.Flags().VisitAll(func(f *flag.Flag) {
if len(f.Name) > longestName {
longestName = len(f.Name)
}
if len(f.Usage) > longestUsage {
longestUsage = len(f.Usage)
}
})
strBuilder.WriteString("\nUsage: tfplugingen-framework generate provider [<args>]\n\n")
cmd.Flags().VisitAll(func(f *flag.Flag) {
if f.DefValue != "" {
strBuilder.WriteString(fmt.Sprintf(" --%s <ARG> %s%s%s (default: %q)\n",
f.Name,
strings.Repeat(" ", longestName-len(f.Name)+2),
f.Usage,
strings.Repeat(" ", longestUsage-len(f.Usage)+2),
f.DefValue,
))
} else {
strBuilder.WriteString(fmt.Sprintf(" --%s <ARG> %s%s%s\n",
f.Name,
strings.Repeat(" ", longestName-len(f.Name)+2),
f.Usage,
strings.Repeat(" ", longestUsage-len(f.Usage)+2),
))
}
})
strBuilder.WriteString("\n")
return strBuilder.String()
}
func (a *GenerateProviderCommand) Synopsis() string {
return "Generate code for the provider from an Intermediate Representation (IR) JSON file."
}
func (cmd *GenerateProviderCommand) Run(args []string) int {
ctx := context.Background()
logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
Level: slog.LevelWarn,
}))
fs := cmd.Flags()
err := fs.Parse(args)
if err != nil {
cmd.UI.Error(fmt.Sprintf("error parsing command flags: %s", err))
return 1
}
err = cmd.runInternal(ctx, logger)
if err != nil {
cmd.UI.Error(fmt.Sprintf("Error executing command: %s\n", err))
return 1
}
return 0
}
func (cmd *GenerateProviderCommand) runInternal(ctx context.Context, logger *slog.Logger) error {
// read input file
src, err := input.Read(cmd.flagIRInputPath)
if err != nil {
return fmt.Errorf("error reading IR JSON: %w", err)
}
// validate JSON
err = validate.JSON(src)
if err != nil {
return fmt.Errorf("error validating IR JSON: %w", err)
}
// parse and validate IR against specification
spec, err := spec.Parse(ctx, src)
if err != nil {
return fmt.Errorf("error parsing IR JSON: %w", err)
}
err = generateProviderCode(ctx, spec, cmd.flagOutputPath, cmd.flagPackageName, "Provider", logger)
if err != nil {
return fmt.Errorf("error generating provider code: %w", err)
}
return nil
}
func generateProviderCode(ctx context.Context, spec spec.Specification, outputPath, packageName, generatorType string, logger *slog.Logger) error {
ctx = logging.SetPathInContext(ctx, "provider")
// convert IR to framework schema
c := provider_convert.NewConverter(spec)
s, err := c.ToGeneratorProviderSchema()
if err != nil {
return fmt.Errorf("error converting IR to Plugin Framework schema: %w", err)
}
// convert framework schema to []byte
g := schema.NewGeneratorSchemas(s)
schemas, err := g.Schemas(packageName, generatorType)
if err != nil {
return fmt.Errorf("error converting Plugin Framework schema to Go code: %w", err)
}
// generate model code
models, err := g.Models()
if err != nil {
log.Fatal(err)
}
// generate custom type and value types code
customTypeValue, err := g.CustomTypeValue()
if err != nil {
log.Fatal(err)
}
// generate "expand" and "flatten" code
toFromFunctions, err := g.ToFromFunctions(ctx, logger)
if err != nil {
log.Fatal(err)
}
// format schema code
formattedSchemas, err := format.Format(schemas)
if err != nil {
return fmt.Errorf("error formatting Go code: %w", err)
}
// format model code
formattedModels, err := format.Format(models)
if err != nil {
log.Fatal(err)
}
// format custom type and value types code
formattedCustomTypeValue, err := format.Format(customTypeValue)
if err != nil {
log.Fatal(err)
}
// format "expand" and "flatten" code
formattedToFromFunctions, err := format.Format(toFromFunctions)
if err != nil {
log.Fatal(err)
}
// write code
err = output.WriteProviders(formattedSchemas, formattedModels, formattedCustomTypeValue, formattedToFromFunctions, outputPath, packageName)
if err != nil {
return fmt.Errorf("error writing Go code to output: %w", err)
}
return nil
}