结构错误：致命错误：local（）在执行“git commit-m”消息时遇到错误（返回代码2）

Question

我正试图设置一个fabfile来部署我的Django应用程序。

我不明白为什么我会犯这个错误：

Fatal error: local() encountered an error (return code 2) while executing 'git commit -m 'changed settings for prodserver'

$ fab create_branch_deploy_to_prodserver
[localhost] run: git checkout prodserver_server
[localhost] run: git merge master
[localhost] run: cp settings_prodserver.py settings.py
[localhost] run: git add settings.py
[localhost] run: git commit -m 'changed settings for prodserver'

Fatal error: local() encountered an error (return code 1) while executing 'git commit -m 'changed settings for prodserver''

Aborting.

如果面料的功能：

def create_branch_deploy_to_prodserver():  
    local("git checkout prodserver_server")  
    local("git merge master")  
    local('cp settings_prodserver.py settings.py') # 
    #local('git rm fabfile.py') #This is also creating error so it's commented out
    local('git add settings.py')  
    local("git commit -m 'changed settings for prodserver'")  

可以从Fabric提交git吗？

Answer 1

这是一个与python相关的问题吗，就像this thread中描述的那样？

The main problem with this is that the stdout/stderr capturing is per-run/sudo invocation and not per-task.

It would be wonderful if you could explain me how I could collect outputand error by only modifying the file called fabfile_runner.py.
Idealy the fabric task itself could be unmodified, this would allow to upload the the factory the same file that you have tested manually.

Check out the Fabric source and look in the 'tests' folder, specifically tests/utils.py. It contains a single decorator, @mock_streams, which is capable of wrapping a function (any function in any Python code -- it's not Fabric specific, as I mentioned) and redirecting sys.stdout and/or sys.stderr for capture/examination.

It's designed for use around functions, being a decorator, so you could use it directly by modifying your fabfile_runner.py like so:

fabfile_runner.py

from StringIO import StringIO
import sys
from test_fabfile import hello_world

def execute(task):
    output = StringIO()
    error = StringIO()
    sys.stdout = output
    sys.stderr = error
    task()
    sys.stdout = sys.__stdout__
    sys.stderr = sys.__stderr__
    return (output.getvalue(), error.getvalue())

output, error = execute(hello_world)
print "output : %s" %output
print "error : %s" %error

Answer 2

当我在声明中添加capture=False时，我能够诊断该问题：

local('git rm fabfile.py', capture=False)
local('git add settings.py', capture=False)

这样可以更详细地显示错误。

显然，Fabric的维护者将在1.0中将local的行为还原为默认情况下不捕获。