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scaffold_provider.go
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/
scaffold_provider.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package cmd
import (
"context"
"errors"
"flag"
"fmt"
"go/format"
"path/filepath"
"strings"
"github.com/hashicorp/cli"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/output"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/scaffold"
"github.com/hashicorp/terraform-plugin-codegen-framework/internal/schema"
)
type ScaffoldProviderCommand struct {
UI cli.Ui
flagProviderNameSnake string
flagOutputDir string
flagOutputFile string
flagPackageName string
flagForceOverwrite bool
}
func (cmd *ScaffoldProviderCommand) Flags() *flag.FlagSet {
fs := flag.NewFlagSet("scaffold provider", flag.ExitOnError)
fs.StringVar(&cmd.flagProviderNameSnake, "name", "", "name of provider in snake case, required")
fs.BoolVar(&cmd.flagForceOverwrite, "force", false, "force creation, overwriting existing files")
fs.StringVar(&cmd.flagOutputDir, "output-dir", ".", "directory path to output scaffolded code file")
fs.StringVar(&cmd.flagOutputFile, "output-file", "", "file name and extension to write scaffolded code to, default is 'provider.go'")
fs.StringVar(&cmd.flagPackageName, "package", "provider", "name of Go package for scaffolded code file")
return fs
}
func (cmd *ScaffoldProviderCommand) 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 scaffold 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 *ScaffoldProviderCommand) Synopsis() string {
return "Create scaffolding code for a Terraform Plugin Framework provider."
}
func (cmd *ScaffoldProviderCommand) Run(args []string) int {
ctx := context.Background()
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)
if err != nil {
cmd.UI.Error(fmt.Sprintf("Error executing command: %s\n", err))
return 1
}
return 0
}
func (cmd *ScaffoldProviderCommand) runInternal(_ context.Context) error {
if cmd.flagProviderNameSnake == "" {
return errors.New("--name flag is required")
}
providerIdentifier := schema.FrameworkIdentifier(cmd.flagProviderNameSnake)
if !providerIdentifier.Valid() {
return fmt.Errorf("'%s' is not a valid Terraform provider identifier", cmd.flagProviderNameSnake)
}
goBytes, err := scaffold.ProviderBytes(providerIdentifier, cmd.flagPackageName)
if err != nil {
return fmt.Errorf("error creating scaffolding provider Go code: %w", err)
}
formattedGoBytes, err := format.Source(goBytes)
if err != nil {
return fmt.Errorf("error formatting scaffolding provider Go code: %w", err)
}
err = output.WriteBytes(cmd.getOutputFilePath(), formattedGoBytes, cmd.flagForceOverwrite)
if err != nil {
return fmt.Errorf("error writing scaffolding provider Go code: %w", err)
}
return nil
}
func (cmd *ScaffoldProviderCommand) getOutputFilePath() string {
filename := "provider.go"
if cmd.flagOutputFile != "" {
filename = cmd.flagOutputFile
}
return filepath.Join(cmd.flagOutputDir, filename)
}