Question

似乎brew无法完全卸载protobuf：

brew uninstall protobuf --force
brew uninstall protobuf@3.1 --force

brew info protobuf
protobuf: stable 3.6.1 (bottled), HEAD
Protocol buffers (Google's data interchange format)
https://github.com/protocolbuffers/protobuf/
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/protobuf.rb
==> Dependencies
Build: autoconf ✘, automake ✘, libtool ✔
Recommended: python@2 ✔
Optional: python ✘
==> Options
--with-python
    Build with python support
--without-python@2
    Build without python2 support
--HEAD
    Install HEAD version
==> Caveats
Editor support and examples have been installed to:
  /usr/local/Cellar/protobuf/3.6.1/share/doc/protobuf
==> Analytics
install: 20,550 (30 days), 75,916 (90 days), 307,704 (365 days)
install_on_request: 10,362 (30 days), 36,197 (90 days), 141,839 (365 days)
build_error: 0 (30 days)

brew uninstall protobuf
Error: No such keg: /usr/local/Cellar/protobuf

protoc
-bash: /usr/local/opt/protobuf@3.1/bin/protoc: No such file or directory

完全卸载它的正确方法是什么？

Answer 1

这不是Homebrew的错：是Bash。

当您键入protoc时，Bash将在您的PATH中搜索可执行文件。您的情况是/usr/local/opt/protobuf@3.1/bin/protoc。但是，它只是第一次这样做：它会为会话缓存其发现。

您卸载了protobuf，因此Homebrew删除了/usr/local/opt/protobuf@3.1/bin/protoc文件；但您尚未清除Bash的缓存，因此它仍然认为该文件存在。

解决方案是启动一个新的Shell会话，或强制Bash使用hash -r清除其缓存。

插图：

$ touch /tmp/hi
$ chmod u+x /tmp/hi
$ export PATH="/tmp:$PATH"

$ which hi
/tmp/hi
$ hi  # <-- executes /tmp/hi and cache hi=/tmp/hi

$ rm /tmp/hi
$ hi  # <-- still executes /tmp/hi because of the cache
bash: /tmp/hi: No such file or directory

$ hash -r # clear the cache
$ hi
hi: command not found

竞争性地卸载protobuf

1 个答案: