task 80330fc4: deduplicate default config path helper

2 files changed, 38 insertions, 0 deletions

diff --git a/internal/appconfig/config_defaults.go b/internal/appconfig/config_defaults.go
new file mode 100644
index 0000000..80ba697
--- /dev/null
+++ b/internal/appconfig/config_defaults.go
@@ -0,0 +1,17 @@
+package appconfig
+
+const configPathFallback = "$XDG_CONFIG_HOME/hexai/config.toml"
+
+// DefaultConfigPath returns the resolved config path or the documented XDG
+// fallback when the real path cannot be determined.
+func DefaultConfigPath() string {
+	return configPathOrFallback(ConfigPath)
+}
+
+func configPathOrFallback(resolve func() (string, error)) string {
+	path, err := resolve()
+	if err != nil {
+		return configPathFallback
+	}
+	return path
+}
diff --git a/internal/appconfig/config_test.go b/internal/appconfig/config_test.go
index cf9a725..c98d904 100644
--- a/internal/appconfig/config_test.go
+++ b/internal/appconfig/config_test.go
@@ -2,6 +2,7 @@ package appconfig
 
 import (
 	"bytes"
+	"errors"
 	"io"
 	"log"
 	"os"
@@ -314,6 +315,26 @@ func TestGetConfigPath_XDG(t *testing.T) {
 	}
 }
 
+func TestDefaultConfigPath_UsesResolvedPath(t *testing.T) {
+	dir := t.TempDir()
+	t.Setenv("XDG_CONFIG_HOME", dir)
+
+	got := DefaultConfigPath()
+	want := filepath.Join(dir, "hexai", "config.toml")
+	if got != want {
+		t.Fatalf("DefaultConfigPath() = %q, want %q", got, want)
+	}
+}
+
+func TestDefaultConfigPath_FallsBackOnError(t *testing.T) {
+	got := configPathOrFallback(func() (string, error) {
+		return "", errors.New("boom")
+	})
+	if got != configPathFallback {
+		t.Fatalf("configPathOrFallback() = %q, want %q", got, configPathFallback)
+	}
+}
+
 func TestStateDir_XDG(t *testing.T) {
 	dir := t.TempDir()
 	t.Setenv("XDG_STATE_HOME", dir)