Fix gh auth status false negative detection

- gh auth status outputs to stderr, not stdout
- Fixed auth detection to properly capture stderr output
- Added fallback detection when gh auth login fails but auth succeeds
- Always check auth status even if gh auth login returns non-zero exit
- Add delay to ensure auth is fully processed before checking
- Provide better feedback when browser fails to open but auth might work

This fixes the issue where authentication succeeds (e.g., via manual URL entry
when browser fails to open) but the autotune system fails to detect it.

Author: ChrisRackauckas

lib/LinearSolveAutotune/src/telemetry.jl

@@ -29,14 +29,15 @@ function setup_github_authentication(; auto_login::Bool = true)
 
     # First check if already authenticated
     try
-        # Suppress output of gh auth status check
-        if success(pipeline(`$gh_cmd auth status`; stdout=devnull, stderr=devnull))
-            # Check if logged in to github.com
-            auth_status_output = read(`$gh_cmd auth status`, String)
-            if contains(auth_status_output, "Logged in to github.com")
-                println("✅ Found active `gh` CLI session. Will use it for upload.")
-                return (:gh_cli, "GitHub CLI")
-            end
+        # gh auth status outputs to stderr, not stdout
+        io = IOBuffer()
+        run(pipeline(`$gh_cmd auth status`; stderr=io, stdout=devnull))
+        seekstart(io)
+        auth_status_output = read(io, String)
+        
+        if contains(auth_status_output, "Logged in to github.com")
+            println("✅ Found active `gh` CLI session. Will use it for upload.")
+            return (:gh_cli, "GitHub CLI")
         end
     catch e
         @debug "gh CLI auth status check failed: $e"
@@ -64,21 +65,66 @@ function setup_github_authentication(; auto_login::Bool = true)
             println("   This will open your browser to authenticate with GitHub.")
             println("   Please follow the prompts to complete authentication.\n")
 
+            # Run gh auth login - it may fail to open browser but still succeed
+            auth_login_success = false
             try
-                # Run gh auth login interactively (using system gh or JLL)
                 run(`$gh_cmd auth login`)
+                auth_login_success = true
+            catch e
+                # gh auth login might fail (e.g., can't open browser) but auth might still work
+                println("\n⚠️  gh auth login reported an issue: $e")
+                println("   Checking if authentication succeeded anyway...")
+            end
+            
+            # Always check auth status, even if gh auth login appeared to fail
+            # This handles cases where browser opening failed but user completed auth manually
+            try
+                # Small delay to ensure auth is fully processed
+                sleep(0.5)
 
-                # Check if authentication succeeded
-                if success(pipeline(`$gh_cmd auth status`; stdout=devnull, stderr=devnull))
-                    auth_status_output = read(`$gh_cmd auth status`, String)
-                    if contains(auth_status_output, "Logged in to github.com")
-                        println("\n✅ Authentication successful! You can now share results.")
-                        return (:gh_cli, "GitHub CLI")
+                # Check current authentication status
+                auth_status_output = ""
+                try
+                    # gh auth status outputs to stderr, not stdout
+                    io = IOBuffer()
+                    run(pipeline(`$gh_cmd auth status`; stderr=io, stdout=devnull))
+                    seekstart(io)
+                    auth_status_output = read(io, String)
+                catch
+                    # If that fails, try capturing both streams
+                    try
+                        io = IOBuffer()
+                        run(pipeline(`$gh_cmd auth status`; stderr=io, stdout=io))
+                        seekstart(io)
+                        auth_status_output = read(io, String)
+                    catch
+                        # Last resort - assume failure
+                        auth_status_output = ""
                     end
                 end
+                
+                if contains(auth_status_output, "Logged in to github.com")
+                    println("\n✅ Authentication successful! You can now share results.")
+                    return (:gh_cli, "GitHub CLI")
+                elseif auth_login_success
+                    # gh auth login succeeded but we can't verify the status
+                    println("\n⚠️  Authentication may have succeeded but couldn't verify status.")
+                    println("   Attempting to use gh CLI anyway...")
+                    return (:gh_cli, "GitHub CLI")
+                else
+                    println("\n❌ Authentication verification failed.")
+                    println("   Output: ", auth_status_output)
+                end
             catch e
-                println("\n❌ Authentication failed: $e")
-                println("   You can try again later or use a GitHub token instead.")
+                if auth_login_success
+                    # gh auth login succeeded but status check failed - try anyway
+                    println("\n⚠️  Couldn't verify authentication status: $e")
+                    println("   gh auth login appeared successful, attempting to proceed...")
+                    return (:gh_cli, "GitHub CLI")
+                else
+                    println("\n❌ Authentication failed: $e")
+                    println("   You can try again later or use a GitHub token instead.")
+                end
             end
         else
             println("\n📝 Skipping authentication. You can authenticate later by:")