面临构建 flutter 工具的问题......同时更新 flutter

Question

I am just to trying updating my flutter using flutter upgrade command.But while updating it stuck at
building flutter tool... . I don't know why. After waiting 4-5 minutes i close my terminal and tried to run again flutter upgrade but no use. If anybody faced this issue before please help.

Answer 1

This is a bit old question but for anyone coming here lately let me try to answer it.

Since I faced this issue multiple times I think it will be helpful to share how I solved it. I found that being stuck at "building flutter tool..." happens usually because of these reasons:

1. Make sure you have a working internet connection: check issues like this one on stackoverflow
2. If there is a dart process running while showing the "building flutter tool..." message, be pateint and let it finish as @pskink commented.
3. If there are multiple dart processes running then it maybe waiting for another command to release so stop them or try running killall dart on terminal and rerunning flutter doctor
4. Delete the cache folder located in flutter/bin directory.(I haven't done this but seems to work for some)

I don't necessarily think this will solve all similar issues but it was how I solved them many times. But I think a detailed log would have been better from flutter. Also checkout this issue on github. .