zsh: source .zshrc for custom fpath directories

pkg/bridges/zsh.go

@@ -1,13 +1,15 @@
 package bridges
 
 import (
+	"fmt"
 	"os"
 	"runtime"
 	"sort"
 	"strings"
 
 	"github.com/carapace-sh/carapace"
 	"github.com/carapace-sh/carapace/pkg/execlog"
+	"github.com/carapace-sh/carapace/pkg/xdg"
 )
 
 func Zsh() []string {
@@ -20,8 +22,16 @@ func Zsh() []string {
 	}
 
 	return cache("zsh", func() ([]string, error) {
-		out, err := execlog.Command("zsh", "--no-rcs", "-c", "printf '%s\n' $fpath").Output()
-		if err != nil {
+		script := "printf '%s\n' $fpath"
+		if configDir, err := xdg.UserConfigDir(); err == nil {
+			zshrc := configDir + "/carapace/bridge/zsh/.zshrc"
+			if _, err := os.Stat(zshrc); err == nil {
+				script = fmt.Sprintf("source %v;%v", zshrc, script)
+			}
+		}
+
+		out, err := execlog.Command("zsh", "--no-rcs", "-c", script).Output()
+		if err != nil { // TODO log stderr
 			return nil, err
 		}
 		lines := strings.Split(string(out), "\n")