checkpoint: generate code for internal/executor/execute.go

cmd/enbas-codegen/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"embed"
 	"flag"
 	"fmt"
 	"os"
@@ -11,13 +12,9 @@ import (
 )
 
 func main() {
-	var (
-		enbasCLISchemaFilepath string
-		executorsFilePath      string
-	)
+	var enbasCLISchemaFilepath string
 
 	flag.StringVar(&enbasCLISchemaFilepath, "path-to-enbas-cli-schema", "", "The path to the Enbas CLI schema file")
-	flag.StringVar(&executorsFilePath, "path-to-enbas-executors", "", "The path to the executors Go file")
 	flag.Parse()
 
 	schema, err := newEnbasCLISchemaFromFile(enbasCLISchemaFilepath)
@@ -25,16 +22,20 @@ func main() {
 		fmt.Printf("ERROR: Unable to read the schema file: %v.\n", err)
 	}
 
-	if err := generateExecutors(schema, executorsFilePath); err != nil {
+	if err := generateExecutors(schema); err != nil {
 		fmt.Printf("ERROR: Unable to generate the executors: %v.\n", err)
 	}
-
-	if err := runGoImports(executorsFilePath); err != nil {
-		fmt.Printf("ERROR: Unable to run goimports: %v.\n", err)
-	}
 }
 
-func generateExecutors(schema enbasCLISchema, output string) error {
+//go:embed templates/executor/*
+var executorTemplates embed.FS
+
+func generateExecutors(schema enbasCLISchema) error {
+	fsDir, err := executorTemplates.ReadDir("templates/executor")
+	if err != nil {
+		return fmt.Errorf("unable to read the template directory in the file system (FS): %w", err)
+	}
+
 	funcMap := template.FuncMap{
 		"capitalise":         capitalise,
 		"flagFieldName":      flagFieldName,
@@ -43,16 +44,39 @@ func generateExecutors(schema enbasCLISchema, output string) error {
 		"internalFlagValue":  internalFlagValue,
 	}
 
-	tmpl := template.Must(template.New("executor-template").Funcs(funcMap).Parse(executorsFileTemplate))
+	for _, obj := range fsDir {
+		templateFilename := obj.Name()
 
-	file, err := os.Create(output)
-	if err != nil {
-		return fmt.Errorf("unable to create the output file: %w", err)
-	}
-	defer file.Close()
+		if !strings.HasSuffix(templateFilename, ".go.gotmpl") {
+			continue
+		}
 
-	if err := tmpl.Execute(file, schema.Commands); err != nil {
-		return fmt.Errorf("unable to generate the code from the template: %w", err)
+		if err := func() error {
+			tmpl := template.Must(template.New(templateFilename).
+				Funcs(funcMap).
+				ParseFS(executorTemplates, "templates/executor/"+templateFilename),
+			)
+
+			output := strings.TrimSuffix(templateFilename, ".gotmpl")
+
+			file, err := os.Create(output)
+			if err != nil {
+				return fmt.Errorf("unable to create the output file: %w", err)
+			}
+			defer file.Close()
+
+			if err := tmpl.Execute(file, schema.Commands); err != nil {
+				return fmt.Errorf("unable to generate the code from the template: %w", err)
+			}
+
+			if err := runGoImports(output); err != nil {
+				return fmt.Errorf("unable to run goimports: %w", err)
+			}
+
+			return nil
+		}(); err != nil {
+			return fmt.Errorf("received an error after attempting to generate the code for %q: %w", templateFilename, err)
+		}
 	}
 
 	return nil

cmd/enbas-codegen/templates/executor/execute.go.gotmpl

@@ -0,0 +1,109 @@
+{{- /* vim: set noexpandtab : */ -}}
+{{- /* vim: set tabstop=8 : */ -}}
+{{- /* vim: set shiftwidth=8 : */ -}}
+{{- /* vim: set softtabstop=8 : */ -}}
+/*
+   This file is generated by the enbas-codegen
+   DO NOT EDIT.
+*/
+{{ print "" }}
+package executor
+{{ print "" }}
+{{ print "" }}
+import "fmt"
+import "codeflow.dananglin.me.uk/apollo/enbas/internal/config"
+import "codeflow.dananglin.me.uk/apollo/enbas/internal/printer"
+{{ print "" }}
+{{ print "" }}
+func Execute(
+	command string,
+	args []string,
+	noColor bool,
+	configDir string,
+) error {
+	var (
+		enbasConfig  *config.Config
+		enbasPrinter *printer.Printer
+		err          error
+	)
+
+	switch command {
+	case "init", "version":
+		enbasPrinter = printer.NewPrinter(noColor, "", 0)
+	default:
+		enbasConfig, err = config.NewConfigFromFile(configDir)
+		if err != nil {
+			enbasPrinter = printer.NewPrinter(noColor, "", 0)
+			enbasPrinter.PrintFailure("unable to load the configuration: " + err.Error() + ".")
+
+			return err
+		}
+
+		enbasPrinter = printer.NewPrinter(
+			noColor,
+			enbasConfig.Integrations.Pager,
+			enbasConfig.LineWrapMaxWidth,
+		)
+	}
+
+	if err = execute(
+		command,
+		args,
+		enbasPrinter,
+		enbasConfig,
+		configDir,
+	); err != nil {
+		enbasPrinter.PrintFailure("(" + command + ") " + err.Error() + ".")
+
+		return err
+	}
+
+	return nil
+}
+{{ print "" }}
+{{ print "" }}
+func execute(
+	command string,
+	args []string,
+	enbasPrinter *printer.Printer,
+	enbasConfig *config.Config,
+	configDir string,
+) error {
+	executorMap := map[string]Executor{
+		{{- range $name, $command := . -}}
+		{{- $new_executor_function_name := capitalise $name | printf "New%sExecutor" -}}
+		{{ print "" }}
+		{{ printf "%q" $name }}: {{ $new_executor_function_name }}(
+			{{- if $command.UsePrinter -}}
+			{{ print "" }}
+			enbasPrinter,
+			{{- end -}}
+			{{- if $command.UseConfig -}}
+			{{ print "" }}
+			enbasConfig,
+			{{- end -}}
+			{{- range $field := $command.AdditionalFields -}}
+			{{ print "" }}
+			{{ $field.Name }},
+			{{- end -}}
+		{{ print "" }}
+		),
+		{{- end -}}
+		{{ print "" }}
+	}
+
+	exe, ok := executorMap[command]
+	if !ok {
+		return UnknownCommandError{Command: command}
+	}
+
+	if err := exe.Parse(args); err != nil {
+		return fmt.Errorf("flag parsing error: %w", err)
+	}
+
+	if err := exe.Execute(); err != nil {
+		return fmt.Errorf("execution error: %w", err)
+	}
+
+	return nil
+}

cmd/enbas-codegen/templates/executor/executors.go.gotmpl

@@ -1,6 +1,8 @@
-package main
-
-var executorsFileTemplate = `/*
+{{- /* vim: set noexpandtab : */ -}}
+{{- /* vim: set tabstop=8 : */ -}}
+{{- /* vim: set shiftwidth=8 : */ -}}
+{{- /* vim: set softtabstop=8 : */ -}}
+/*
    This file is generated by the enbas-codegen
    DO NOT EDIT.
 */
@@ -104,4 +106,3 @@ func {{ $new_executor_function_name }}(
 	return &exe
 }
 {{ end }}
-`

internal/executor/codegen.go

@@ -0,0 +1,3 @@
+package executor
+
+//go:generate go run ../../cmd/enbas-codegen --path-to-enbas-cli-schema ../../schema/enbas_cli_schema.json

internal/executor/execute.go

@@ -1,3 +1,8 @@
+/*
+   This file is generated by the enbas-codegen
+   DO NOT EDIT.
+*/
+
 package executor
 
 import (
@@ -20,7 +25,7 @@ func Execute(
 	)
 
 	switch command {
-	case commandInit, commandVersion:
+	case "init", "version":
 		enbasPrinter = printer.NewPrinter(noColor, "", 0)
 	default:
 		enbasConfig, err = config.NewConfigFromFile(configDir)
@@ -61,78 +66,78 @@ func execute(
 	configDir string,
 ) error {
 	executorMap := map[string]Executor{
-		commandAccept: NewAcceptExecutor(
+		"accept": NewAcceptExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandAdd: NewAddExecutor(
+		"add": NewAddExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandBlock: NewBlockExecutor(
+		"block": NewBlockExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandCreate: NewCreateExecutor(
+		"create": NewCreateExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandDelete: NewDeleteExecutor(
+		"delete": NewDeleteExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandEdit: NewEditExecutor(
+		"edit": NewEditExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandFollow: NewFollowExecutor(
+		"follow": NewFollowExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandInit: NewInitExecutor(
+		"init": NewInitExecutor(
 			enbasPrinter,
 			configDir,
 		),
-		commandLogin: NewLoginExecutor(
+		"login": NewLoginExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandMute: NewMuteExecutor(
+		"mute": NewMuteExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandReject: NewRejectExecutor(
+		"reject": NewRejectExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandRemove: NewRemoveExecutor(
+		"remove": NewRemoveExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandSwitch: NewSwitchExecutor(
+		"show": NewShowExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandUnfollow: NewUnfollowExecutor(
+		"switch": NewSwitchExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandUnmute: NewUnmuteExecutor(
+		"unblock": NewUnblockExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandUnblock: NewUnblockExecutor(
+		"unfollow": NewUnfollowExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandShow: NewShowExecutor(
+		"unmute": NewUnmuteExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),
-		commandVersion: NewVersionExecutor(
+		"version": NewVersionExecutor(
 			enbasPrinter,
 		),
-		commandWhoami: NewWhoamiExecutor(
+		"whoami": NewWhoamiExecutor(
 			enbasPrinter,
 			enbasConfig,
 		),

internal/internal.go

@@ -1,7 +1,5 @@
 package internal
 
-//go:generate go run ../cmd/enbas-codegen --path-to-enbas-cli-schema ../schema/enbas_cli_schema.json --path-to-enbas-executors ./executor/executors.go
-
 const (
 	ApplicationName    = "enbas"
 	ApplicationWebsite = "https://codeflow.dananglin.me.uk/apollo/enbas"