Hello, I am going to give an interactive presentation of git using org-mode and babel. But I am stuck with random hangs when executing the code with =C-c C-c= and during export.
I am using Org-mode version 8.2.4 (8.2.4-dist @ /home/vagrant/.emacs.d/el-get/org-mode/lisp/) The hangs does not always happen, but if you execute the following code blocks a couple of times you should ran into the problem. Assumption: the file =/etc/sudoers= contains something like "vagrant ALL=(ALL) NOPASSWD:ALL" to not ask password with an interactive prompt. #+PROPERTY: header-args:shell :session *git-shell* :dir /vagrant #+PROPERTY: header-args:shell+ :exports both :results output verbatim replace #+PROPERTY: header-args:shell+ :tangle git_demo.sh :shebang "#!/bin/bash" :comments org #+BEGIN_SRC shell sudo apt-get remove --purge --yes git && sudo apt-get autoremove --yes #+END_SRC #+BEGIN_SRC shell sudo apt-get install --yes git #+END_SRC My guess, by looking at the *git-shell* buffer after waiting a minute and hitting C-g, is that the output of echo 'org_babel_sh_eoe' sometimes is eaten by some ansi sequence of the interactive command. See for example the following cut and paste from the *git-shell* buffer. Do babel do something nasty with the shell/term emulator? #+begin_example vagrant@git-pratical:/vagrant$ sudo apt-get remove --purge --yes git && sudo apt-get autoremove --yes Reading package lists... 0%echo 'org_babel_sh_eoe' Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: git-man liberror-perl Use 'apt-get autoremove' to remove them. The following packages will be REMOVED: git* 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. After this operation, 22.2 MB disk space will be freed. (Reading database ... 122644 files and directories currently installed.) Removing git (1:2.3.0-0ppa1~ubuntu12.04.1) ... Purging configuration files for git (1:2.3.0-0ppa1~ubuntu12.04.1) ... Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: git-man liberror-perl 0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded. After this operation, 1,477 kB disk space will be freed. (Reading database ... 122040 files and directories currently installed.) Removing git-man (1:2.3.0-0ppa1~ubuntu12.04.1) ... Removing liberror-perl (0.17-1.1) ... Processing triggers for man-db (2.6.7.1-1ubuntu1) ... vagrant@git-pratical:/vagrant$ #+end_example An indirect confirmation of my guess comes from a test: redirecting the output of the command and then printing it. Using this workaround babel never hangs: #+BEGIN_SRC shell (any_strange_command) 1>/tmp/1 2>/tmp/2; cat /tmp/1 /tmp/2 #+END_SRC Do you think that is easy to fix babel or can you suggest a less invasive and more comprehensive workaround? Wrapping loops and pipes is going to clutter the code to the point that is better to use a script with inline comments rather that using the org-mode buffer. Thanks in advance, Daniele
