Create setup script for Xi Xu Codex provider

This script sets up the Xi Xu Codex provider by configuring the API key and updating the configuration file.

codex.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# 用法:
+#   bash setup-xixu.sh your_api_key
+# 或:
+#   XIXU_API_KEY=your_api_key bash setup-xixu.sh
+
+API_KEY="${1:-${XIXU_API_KEY:-}}"
+
+if [[ -z "$API_KEY" ]]; then
+  read -rsp "请输入 XIXU_API_KEY: " API_KEY
+  echo
+fi
+
+CONFIG_DIR="$HOME/.codex"
+CONFIG_FILE="$CONFIG_DIR/config.toml"
+
+mkdir -p "$CONFIG_DIR"
+touch "$CONFIG_FILE"
+
+TMP_FILE="$(mktemp)"
+
+awk '
+BEGIN {
+  in_xixu = 0
+  model_provider_written = 0
+}
+{
+  if ($0 ~ /^[[:space:]]*model_provider[[:space:]]*=/) {
+    if (!model_provider_written) {
+      print "model_provider = \"xixu\""
+      model_provider_written = 1
+    }
+    next
+  }
+
+  if ($0 ~ /^\[model_providers\.xixu\][[:space:]]*$/) {
+    in_xixu = 1
+    next
+  }
+
+  if (in_xixu && $0 ~ /^\[.*\][[:space:]]*$/) {
+    in_xixu = 0
+  }
+
+  if (!in_xixu) {
+    print $0
+  }
+}
+END {
+  if (!model_provider_written) {
+    print ""
+    print "model_provider = \"xixu\""
+  }
+
+  print ""
+  print "[model_providers.xixu]"
+  print "name = \"Xi Xu'\''s AI Inference\""
+  print "base_url = \"https://api.xi-xu.me/v1\""
+  print "env_key = \"XIXU_API_KEY\""
+}
+' "$CONFIG_FILE" > "$TMP_FILE"
+
+mv "$TMP_FILE" "$CONFIG_FILE"
+
+export XIXU_API_KEY="$API_KEY"
+
+SHELL_NAME="$(basename "${SHELL:-bash}")"
+if [[ "$SHELL_NAME" == "zsh" ]]; then
+  RC_FILE="$HOME/.zshrc"
+else
+  RC_FILE="$HOME/.bashrc"
+fi
+
+touch "$RC_FILE"
+
+if grep -q '^export XIXU_API_KEY=' "$RC_FILE"; then
+  sed -i.bak "s|^export XIXU_API_KEY=.*$|export XIXU_API_KEY=\"$API_KEY\"|" "$RC_FILE"
+else
+  {
+    echo ""
+    echo "# Added for Xi Xu Codex provider"
+    echo "export XIXU_API_KEY=\"$API_KEY\""
+  } >> "$RC_FILE"
+fi
+
+echo "已完成："
+echo "1. 更新 $CONFIG_FILE"
+echo "2. 设置当前会话环境变量 XIXU_API_KEY"
+echo "3. 持久化到 $RC_FILE"
+echo
+echo "可执行：source \"$RC_FILE\""