Add local candidate validation

cmd/releasekit/internal/cli/config.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"flag"
 	"fmt"
 	"io"
 	"os"
@@ -15,26 +16,49 @@ import (
 	"gitea.maximumdirect.net/eric/ReleaseKit/internal/process"
 )
 
-const Usage = "usage: releasekit version"
+const Usage = "usage: releasekit version\n       releasekit check [--repo DIR] [--config FILE] VERSION"
 
 type Command string
 
-const VersionCommand Command = "version"
+const (
+	VersionCommand Command = "version"
+	CheckAction    Command = "check"
+)
 
 // Invocation contains parsed command settings owned by the CLI adapter.
 type Invocation struct {
-	Command Command
+	Command    Command
+	Repository string
+	ConfigPath string
+	Version    string
 }
 
 // Parse accepts only commands that have been implemented by the executable.
 func Parse(args []string) (Invocation, error) {
-	if len(args) == 1 && args[0] == string(VersionCommand) {
-		return Invocation{Command: VersionCommand}, nil
-	}
 	if len(args) == 0 {
 		return Invocation{}, errors.New("a command is required")
 	}
-	return Invocation{}, fmt.Errorf("unknown command %q", args[0])
+	switch args[0] {
+	case string(VersionCommand):
+		if len(args) != 1 {
+			return Invocation{}, errors.New("version takes no arguments")
+		}
+		return Invocation{Command: VersionCommand}, nil
+	case string(CheckAction):
+		flags := flag.NewFlagSet("check", flag.ContinueOnError)
+		flags.SetOutput(io.Discard)
+		repository := flags.String("repo", ".", "repository directory")
+		configPath := flags.String("config", "", "profile path")
+		if err := flags.Parse(args[1:]); err != nil {
+			return Invocation{}, err
+		}
+		if flags.NArg() != 1 {
+			return Invocation{}, errors.New("check requires one version argument")
+		}
+		return Invocation{Command: CheckAction, Repository: *repository, ConfigPath: *configPath, Version: flags.Arg(0)}, nil
+	default:
+		return Invocation{}, fmt.Errorf("unknown command %q", args[0])
+	}
 }
 
 // CheckCommand contains one direct child-process invocation from a profile.
@@ -101,12 +125,19 @@ func LoadSettings(repoDir, configPath string) (Settings, error) {
 
 // RunChecks runs configured argument vectors in repoDir. Each command receives
 // its own environment overlay and inherits the remaining process environment.
-func RunChecks(ctx context.Context, repoDir string, checks []CheckCommand, stdout, stderr io.Writer) error {
+func RunChecks(ctx context.Context, repoDir string, checks []CheckCommand, ownedEnv map[string]string, stdout, stderr io.Writer) error {
 	for i, check := range checks {
+		environment := make(map[string]string, len(check.Env)+len(ownedEnv))
+		for key, value := range check.Env {
+			environment[key] = value
+		}
+		for key, value := range ownedEnv {
+			environment[key] = value
+		}
 		if err := process.Run(ctx, process.Invocation{
 			Args:   check.Args,
 			Dir:    repoDir,
-			Env:    check.Env,
+			Env:    environment,
 			Stdout: stdout,
 			Stderr: stderr,
 		}); err != nil {