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Why would a password requirement prohibit a number in the last character? For example, PNGOut returns an error code of 2 when it is unable to compress a file. Cover an unusual board with minimum chess rooks Sed replace specific line in file Removing elements from an array that are in another array Physically locating the server Is there any Is there a way to check for an error code and react to it rather than having Fabric panic and die?

Note Since fastprint calls puts, it is likewise subject to the user output level. First we need to do a small import: from contextlib import contextmanager Then we can create the wrapper: env.warn_only=False @contextmanager def rollbackwrap(): try: yield except SystemExit: rollback() abort("Fail!") Notice that now It is easy to not have the traceback display on the screen, but Im not sure I recommend avoiding the traceback completely. Can two integer polynomials touch in an irrational point?

Fabric defaults to a “fail-fast” behavior pattern: if anything goes wrong, such as a remote program returning a nonzero return value or your fabfile’s Python code encountering an exception, execution will Fabric member bitprophet commented Aug 20, 2011 With the way things are now, I think you can still accomplish what you describe, unless I'm missing something. I wish there was a global way to say to Fabric to just don't raise exceptions. It defaults to False, meaning an error condition will result in the program aborting immediately.

up vote 52 down vote favorite 11 Normally Fabric quits as soon as a run() call returns a non-zero exit code. Join them; it only takes a minute: Sign up Can I catch error codes when using Fabric to run() calls in a remote shell? Ought to be a nicer way to say "I expect this command or block of commands to fail and that's OK, keep going". trick: run fab with -w option, or turn on warn_only temporarily with code like this: with settings(warn_only = True): run('some commmand')

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Is there a role with more responsibility? Fabric Pythonic remote execution Navigation Overview and Tutorial The environment dictionary, env Execution model fab options and arguments Fabfile construction and use Interaction with remote programs Library Use Managing share|improve this answer answered Jan 16 '15 at 18:15 ArtOfWarfare 8,42755483 Thanks for this, but one question - is it possible access/pass in the current fabric env dict as-defined What are "desires of the flesh"?

Related Fabric, Fabric Tutorials, Tutorials contextmanager, error handling, Fabric, Fabric 1.4.1, wrapper ← Puppet: User Management and /home overNFS Subsys lock problem with CentOS 6.2 andApache → Leave a Reply Cancel In nomenclature, does double or triple bond have higher priority? See also fastprint fabric.utils.warn(msg)¶ Print warning message, but do not abort execution. Edit.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed python fabric share|improve this question edited Oct 24 '13 at 19:21 Tshepang 4,6841059103 asked Oct 6 '10 at 21:11 Mingo 7832716 add a comment| 6 Answers 6 active oldest votes up warn_only turns off the automatic abort so you can handle problems your own way: with settings(warn_only=True): result = run("this fails") if result.failed: print "Oh dear: %s" % result.stdout raise WhateverExceptionYouWant If Is accuracy a binary?

I only just started using fabric 20 minutes ago, but I'd like to do something like: current_HEAD = run("git rev-parse HEAD") try: run("git pull origin master") run("test_might_pass") run("might_also_pass") run("may_well_fail") except FailedCommandException: This block my app, and print a horrible stack trace. If func is None (the default), the value of env.warn_only determines whether to call abort or warn. share|improve this answer answered Feb 3 '11 at 16:40 Alan Plum 6,61422948 add a comment| up vote 1 down vote try this from fabric.api import run, env env.warn_only = True #

You create the class maybe inheriting from Exception –Padraic Cunningham Mar 4 '15 at 1:49 add a comment| up vote 1 down vote so you want to know when this happens asked 5 years ago viewed 24824 times active 11 months ago Linked 79 How to continue a task when Fabric receives an error 1 Python - Capture exit status of command RSSを取得 アーカイブを見る ランダム投稿 モバイル版 木曜日, 5月 23, 2013 python - Can I catch error codes when using Fabric to run() calls in a remote shell? - Stack Overflow exit statusによって分岐する 15:15に投稿されました Skip to content Ignore Learn more Please note that GitHub no longer supports old versions of Firefox.

Digital Diversity Is intelligence the "natural" product of evolution? Not the answer you're looking for? env.abort_exception = MyExceptionClass. See my answer here: stackoverflow.com/a/25293275/901641 –ArtOfWarfare Sep 15 '14 at 12:11 I fixed the Python indentation, but now I can't remove the extra text I added to get the

Hot Network Questions How to convert a set of sequential integers into a set of unique random numbers? See my answer: stackoverflow.com/a/25293275/901641 –ArtOfWarfare Sep 15 '14 at 12:10 add a comment| 4 Answers 4 active oldest votes up vote 77 down vote accepted You can prevent aborting on non-zero low level network error cause execution abort Low level network error like name resolve error, connection timeout, connection refuesed, would normally cause execution abort. Any better way to determine source of light by analyzing the electromagnectic spectrum of the light Game of Life, a shorter story Why would a password requirement prohibit a number in

Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. Follow me Search for: Categories Linux Desktop (5) Programming (23) Bash (1) Perl (4) Python (4) Security (4) System Administration (38) Database (1) Email (4) Virtualization (2) VPN (2) Web (6) This setting allows you to override that behavior (which is what happens when env.abort_exception is None.) Give it a callable which takes a string (the error message that would have been so that wherever we call _handle_failure we'd raise an exception instead) because that is far more Pythonic, first off, and secondly there are some use cases where it's a real pain

fabric.utils.abort(msg)¶ Abort execution, print msg to stderr and exit with error status (1.) This function currently makes use of SystemExit in a manner that is similar to sys.exit (but which Is the mass of an individual star almost constant throughout its life? I just retested with Fabric==1.6.2, and it works fine. –Chris Marinos Jul 8 '14 at 18:26 Possibly, I am using Fabric==1.9.0 and it does not work for me –cevaris to bypass output buffering) by setting flush=True.

Join them; it only takes a minute: Sign up How to continue a task when Fabric receives an error up vote 79 down vote favorite 11 When I define a task If exception is given, it is inspected to get a string message, which is printed alongside the user-generated message. Beware of evaluating directly bool(result) because it uses the output, so in conjunction with hide("warnings") and similar, will not be able to tell a success from a failure. –rewritten Jan 22 Once the task list has been constructed, Fabric will start executing them as outlined in Execution strategy, until all tasks have been run on the entirety of their host lists.

Can an ATCo refuse to give service to an aircraft based on moral grounds? Appease Your Google Overlords: Draw the "G" Logo Digital Diversity Should I oblige when a client asks to use a design as a logo when it wasn't made to be the