impr: modular sandbox configs

internal/config/load.go

@@ -4,12 +4,15 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+	"strings"
+
+	"github.com/nalgeon/codapi/internal/fileio"
 )
 
 const (
-	configFilename   = "config.json"
-	boxesFilename    = "boxes.json"
-	commandsFilename = "commands.json"
+	configFilename  = "config.json"
+	boxesFilename   = "boxes.json"
+	commandsDirname = "commands"
 )
 
 // Read reads application config from JSON files.
@@ -24,7 +27,7 @@ func Read(path string) (*Config, error) {
 		return nil, err
 	}
 
-	cfg, err = ReadCommands(cfg, filepath.Join(path, commandsFilename))
+	cfg, err = ReadCommands(cfg, filepath.Join(path, commandsDirname))
 	if err != nil {
 		return nil, err
 	}
@@ -71,31 +74,36 @@ func ReadBoxes(cfg *Config, path string) (*Config, error) {
 
 // ReadCommands reads commands config from a JSON file.
 func ReadCommands(cfg *Config, path string) (*Config, error) {
-	data, err := os.ReadFile(path)
+	fnames, err := filepath.Glob(filepath.Join(path, "*.json"))
 	if err != nil {
 		return nil, err
 	}
 
-	commands := make(map[string]SandboxCommands)
-	err = json.Unmarshal(data, &commands)
-	if err != nil {
-		return nil, err
-	}
-
-	for _, playCmds := range commands {
-		for _, cmd := range playCmds {
-			if cmd.Before != nil {
-				setStepDefaults(cmd.Before, cfg.Step)
-			}
-			for _, step := range cmd.Steps {
-				setStepDefaults(step, cfg.Step)
-			}
-			if cmd.After != nil {
-				setStepDefaults(cmd.After, cfg.Step)
-			}
+	cfg.Commands = make(map[string]SandboxCommands, len(fnames))
+	for _, fname := range fnames {
+		sandbox := strings.TrimSuffix(filepath.Base(fname), ".json")
+		commands, err := fileio.ReadJson[SandboxCommands](fname)
+		if err != nil {
+			break
 		}
+		setCommandDefaults(commands, cfg)
+		cfg.Commands[sandbox] = commands
 	}
 
-	cfg.Commands = commands
 	return cfg, err
 }
+
+// setCommandDefaults applies global defaults to sandbox commands.
+func setCommandDefaults(commands SandboxCommands, cfg *Config) {
+	for _, cmd := range commands {
+		if cmd.Before != nil {
+			setStepDefaults(cmd.Before, cfg.Step)
+		}
+		for _, step := range cmd.Steps {
+			setStepDefaults(step, cfg.Step)
+		}
+		if cmd.After != nil {
+			setStepDefaults(cmd.After, cfg.Step)
+		}
+	}
+}