[英]Fabric - Is there any way to capture run stdout?
I'm trying to do the following: 我正在尝试执行以下操作:
output = run("ls -l backups")
for line in output.split("/n"):
do_stuff(line)
Any way of having the stdout
of ls
sent to output
? 具有的任何stdout
的ls
发送到output
?
To be more specific I'm using a CLI app called s3cmd
which does something similar to ls
, but with remote Amazon S3 buckets. 更具体地说,我正在使用名为s3cmd
的CLI应用程序,该应用程序执行与ls
类似的操作,但使用远程Amazon S3存储桶。
So a replacement for ls
won't help unfortunately. 因此,遗憾的是,替换ls
无济于事。
Exactly what you are asking for should be happening. 你要求的正是应该发生的事情。 From the docs : 来自文档 :
run will return the result of the remote program's stdout as a single (likely multiline) string. run将远程程序的stdout的结果作为单个(可能是多行)字符串返回。
run()
, and related commands like local()
and sudo()
, return an _AttributeString
object that is just a wrapper around stdout with attribute access to additional information like failure/success booleans, stderr, the command run, etc. The result object also has a stdout
attribute, which is just more explicit. run()
和相关命令(如local()
和sudo()
返回一个_AttributeString
对象,该对象只是stdout的包装器,具有对失败/成功布尔值,stderr,命令运行等其他信息的属性访问权限。结果对象还有一个stdout
属性,它更加明确。
To troubleshoot, print type(output), output
to be sure the response is what you expect. 要进行故障排除,请print type(output), output
以确保响应符合您的预期。 Examine output.failed
and output.stderr
. 检查output.failed
和output.stderr
。 It could be the command isn't doing what you expect, there is no "backups" directory, etc. 它可能是命令没有做你期望的,没有“备份”目录等。
Try as below using String IO 使用String IO尝试如下
from fabric.api import *
from StringIO import StringIO
fh = StringIO()
run("ls -l backups", stdout=fh)
fh.seek(0)
for line in fh.readlines():
do_stuff(line)
In case you need to use run(), you can do it like this: 如果你需要使用run(),你可以这样做:
with settings(
hide('warnings', 'running', 'stdout', 'stderr'),
warn_only=True
):
command = 'ls -l backups'
output = run(command)
for line in output.splitlines():
do_stuff(line)
For local() there is a bit more simple solution: 对于local(),有一个更简单的解决方案:
command = 'ls -l backups'
output = local(command, capture=True)
for line in output.splitlines():
do_stuff(line)
I hope it helps. 我希望它有所帮助。
You can also use this if you are using the local()
api, by setting the capture=True
如果您使用local()
api,也可以通过设置capture=True
@task
def login_ecr_docker():
ecr_login = local("aws ecr get-login --region us-west-2", capture=True)
docker_login = ecr_login.stdout
status = local(docker_login, capture=True)
print (status.stdout)
Try split using " \\r\\n
": 尝试使用“ \\r\\n
”拆分:
output = run("ls -l backups")
output_stdout = output.stdout.split("\r\n")
Just simply return it: 只需简单地返回:
def output():
return run("ls -l backups")
a = execute(output, host=hostname)
print a
a will be dictionary of results. a将是结果字典。
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