fix: honor ask environment overrides

plugins/ask.go

@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -34,12 +35,35 @@ func (p *Ask) Help() string {
 }
 
 func (p *Ask) Init(c bot.PluginConfig, _ *storage.DB) error {
-	p.cfg = c
+	p.cfg = withAskEnvironment(c)
 	p.last = make(map[string]time.Time)
 	p.lastWarning = make(map[string]time.Time)
 	return nil
 }
 
+// withAskEnvironment applies the ask-specific environment variables after
+// the config file has been decoded. Viper can read bound scalar environment
+// values with Get, but nested map values are not reliably reflected when the
+// whole plugin map is unmarshaled into PluginConfig. Applying these two
+// switches here makes the documented .env overrides authoritative without
+// requiring secrets in config.yaml.
+func withAskEnvironment(c bot.PluginConfig) bot.PluginConfig {
+	cfg := make(bot.PluginConfig, len(c)+2)
+	for key, value := range c {
+		cfg[key] = value
+	}
+
+	if provider := strings.TrimSpace(os.Getenv("BOT_ASK_PROVIDER")); provider != "" {
+		cfg["provider"] = provider
+	}
+	if raw, ok := os.LookupEnv("BOT_ASK_AI_REWRITE"); ok {
+		if enabled, err := strconv.ParseBool(strings.TrimSpace(raw)); err == nil {
+			cfg["ai_rewrite"] = enabled
+		}
+	}
+	return cfg
+}
+
 func (p *Ask) Handle(b *bot.Bot, m bot.Message) bool {
 	cmd, arg, ok := bot.IsCommand(m, b.Config.CommandPrefix)
 	if !ok || !isAskCommand(cmd) {

plugins/ask_test.go

@@ -46,6 +46,38 @@ func TestAskProviderNoneDoesNotCallAI(t *testing.T) {
 	}
 }
 
+func TestAskEnvironmentOverridesNestedConfig(t *testing.T) {
+	t.Setenv("BOT_ASK_PROVIDER", "openrouter")
+	t.Setenv("BOT_ASK_AI_REWRITE", "true")
+
+	p := &Ask{}
+	if err := p.Init(bot.PluginConfig{
+		"provider":   "none",
+		"ai_rewrite": false,
+		"max_length": 360,
+	}, nil); err != nil {
+		t.Fatalf("init failed: %v", err)
+	}
+	if got := p.cfg.String("provider", "none"); got != "openrouter" {
+		t.Fatalf("provider = %q, want openrouter", got)
+	}
+	if !p.cfg.Bool("ai_rewrite", false) {
+		t.Fatal("ai_rewrite remained disabled despite BOT_ASK_AI_REWRITE=true")
+	}
+}
+
+func TestAskInvalidEnvironmentBooleanLeavesConfigUnchanged(t *testing.T) {
+	t.Setenv("BOT_ASK_AI_REWRITE", "not-a-boolean")
+
+	p := &Ask{}
+	if err := p.Init(bot.PluginConfig{"ai_rewrite": true}, nil); err != nil {
+		t.Fatalf("init failed: %v", err)
+	}
+	if !p.cfg.Bool("ai_rewrite", false) {
+		t.Fatal("invalid environment boolean unexpectedly changed config")
+	}
+}
+
 func TestAskSenderKeyUsesAccountWhenAvailable(t *testing.T) {
 	key := askSenderKey(bot.Message{Nick: "Echo", Account: "UserAccount"})
 	if key != "account:useraccount" {