From 948e4d589b9671aea0ae5658b6f6a0316dbc9632 Mon Sep 17 00:00:00 2001
From: hobostay <110hqc@gmail.com>
Date: Mon, 9 Feb 2026 11:43:44 +0800
Subject: [PATCH] fix: Improve prerelease version filtering and terminal
 detection

This commit fixes two issues in the installation script:

1. Fix prerelease tag filtering
   - Previous behavior: Used `tail -1` which could return any tag (stable or prerelease)
   - New behavior: Filters for tags containing '-' which indicate prerelease versions
     (e.g., v1.0.0-beta, v1.0.0-alpha, etc.)
   - Uses `grep -E '\-.*refs/tags/'` to filter for prerelease patterns
   - Ensures `VERSION="prerelease"` actually installs a prerelease version

2. Remove redundant terminal detection
   - Previous behavior: Checked `[ -t 0 ] || [ -e /dev/tty ]`
   - The `[ -e /dev/tty ]` check tests if /dev/tty exists, not if stdin is a terminal
   - This is redundant and could cause issues in some environments
   - New behavior: Only use `[ -t 0 ]` which correctly checks if stdin is a TTY

These changes improve the reliability of the installation script,
especially when installing prerelease versions.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
---
 install.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/install.sh b/install.sh
index fb3d3d4..a6cd110 100755
--- a/install.sh
+++ b/install.sh
@@ -44,7 +44,7 @@ elif [ "${VERSION}" = "prerelease" ]; then
     echo "Error: git is required to install prerelease versions" >&2
     exit 1
   fi
-  VERSION="$(git ls-remote --tags https://github.com/github/copilot-cli | tail -1 | awk -F/ '{print $NF}')"
+  VERSION="$(git ls-remote --tags https://github.com/github/copilot-cli | grep -E '\-.*refs/tags/' | tail -1 | awk -F/ '{print $NF}')"
   if [ -z "$VERSION" ]; then
     echo "Error: Could not determine prerelease version" >&2
     exit 1
@@ -149,7 +149,7 @@ if ! command -v copilot >/dev/null 2>&1; then
   esac
 
   # Prompt user to add to shell rc file (only if interactive)
-  if [ -t 0 ] || [ -e /dev/tty ]; then
+  if [ -t 0 ]; then
     echo ""
     printf "Would you like to add it to %s? [y/N] " "$RC_FILE"
     if read -r REPLY </dev/tty 2>/dev/null; then