Better way to check if file exists?

[Mark Mandel]

Hi all,

I'm setting up my local machine provisioning on Ubuntu, and I find myself doing this pattern a lot for software that's not managed by APT/PPA. E.g. Google Chrome.

#chrome

- name: See if chrome is installed

  command: find /usr/bin -name 'google-chrome'

  register: chrome_installed

- include: _google_chrome.yml

  when: (not chrome_installed.stdout)

So I check to see if the file exists using a find, store that result in a variable, and then use it in my when to decide if ansible should do the chrome install process (which is an include).

Is there an easier way to check if a file exists?  Maybe a simple lookup plugin that I'm missing?

Just figured I would ask the question, as I'm doing this a lot, and thought there may be a more efficient way.

Thanks!

Mark

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[Michael DeHaan]

lookup plugins are evaluated server side and are not a fit in this case.

I would probably key it off the return code of a find, using .rc vs .stdout

You could definitely write a custom facts module that would make setting all those variables a lot easier, and it could encapsulate all of those checks.

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[Mark Mandel]

Thanks, I will look into doing some custom facts.

Another way to check if a file exists, that I'm liking a bit more than the 'find' syntax is using shell like so:

- name: See if zsh is installed
  shell: "[ -d ~/.oh-my-zsh ] && echo 'Found' || echo ''"
  register: zsh_installed

Which I am using in my ZSH installation include here: https://github.com/markmandel/dotfiles/blob/master/provision/roles/core/tasks/_oh_my_zsh.yml

Works out very well, as find can sometimes be a bit of a pain.

Mark

[Michael DeHaan]

Can't you just do a regular "-f" test?

[Michael DeHaan]

Nevermind, read that as if you were running oh-my-zsh to check if something else was there.

Brain not working, sorry :)

[Mark Mandel]

No dramas ;) only just realised I could do -f / -d test too.

Mark

[GW]

Hi,

On Sun, 23 Jun 2013 10:51:29 +1000, Mark Mandel wrote:

I'm setting up my local machine provisioning on Ubuntu, and I find myself doing this pattern a lot for software that's not managed by APT/PPA. E.g. Google Chrome.

Just curious why are you using Google Chrome, instead of Chromium that *is* managed by APT/PPA and is even in the official repositories?

And in case you install this packages through a .deb archive, you may consider creating a local repository for you custom packages, eg. in `/root/debs`. This is pretty simple to do, you just need to regenerate Packages.gz each time and add it to your /etc/apt/sources.list. Than you use all packages through APT tools as usual.

Greetings,
   gw 

[Serge van Ginderachter]

On 23 June 2013 17:19, GW <gw....@tnode.com> wrote:

I'm setting up my local machine provisioning on Ubuntu, and I find myself doing this pattern a lot for software that's not managed by APT/PPA. E.g. Google Chrome.

Just curious why are you using Google Chrome, instead of Chromium that *is* managed by APT/PPA and is even in the official repositories?

​Google Chrome actually has also an apt repo:

deb http://dl.google.com/linux/chrome/deb/ stable main

Serge​

[Mark Mandel]

Chrome has more features - including an updated Flash.

https://code.google.com/p/chromium/wiki/ChromiumBrowserVsGoogleChrome

Can't remember if Chromium has the bookmark / extension sync feature. I can't live without that.

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[Mark Mandel]

Yeah, that would be another way to go for sure.

Mark

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[Brian Coca]

I use chromium, it does have bookmark/extension sync.

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