Bitcoin ticker dans le prompt du shell

Je ne possède aucun bitcoin mais pour taquiner mes collègues, riches de 0.2 à 2.4 bitcoins, j'ai mis un bitcoin ticker dans le prompt du shell. C'est bien, faisez tous comme moi!

➜ jscl git:(explore/react) ✗
bitcoin_ticker_value()
{
 node -e "jsonticker=$(curl -s https://blockchain.info/ticker);console.log(jsonticker['EUR']['15m']);"
}
bitcoin_ticker_info()
{
 printf '[EUR %s]' "$(bitcoin_ticker_value)"
}
bitcoin_ticker_install()
{
 PROMPT='$(bitcoin_ticker_info) '"${PROMPT}"
}

Et le voilà en action (ZSH):

➜ jscl git:(explore/react) ✗ bitcoin_ticker_install
[EUR 14005.31] ➜ jscl git:(explore/react) ✗ 
[EUR 14005.31] ➜ jscl git:(explore/react) ✗ git status 
On branch explore/react
Your branch is ahead of 'origin/explore/react' by 3 commits.
 (use "git push" to publish your local commits)
Changes not staged for commit:
 (use "git add <file>..." to update what will be committed)
 (use "git checkout -- <file>..." to discard changes in working directory)
 modified: react.html
 modified: react/example-2.lisp
 modified: react/react.lisp
Untracked files:
 (use "git add <file>..." to include in what will be committed)
 FFI.md
 HACKING.pdf
 HACKING.tex
 babel-example.js
 lfreact/
 react/example-1.js
 react/example-2.js
no changes added to commit (use "git add" and/or "git commit -a")
[EUR 13969.59] ➜ jscl git:(explore/react) ✗ git add react.html react/react.lisp
[EUR 14530.99] ➜ jscl git:(explore/react) ✗ git commit --fixup=0f6b7b5
[explore/react eaf1779] fixup! Work on the definition of CREATE-CLASS
 2 files changed, 27 insertions(+), 20 deletions(-)
[EUR 13969.59] ➜ jscl git:(explore/react) ✗ 
[EUR 13855.45] ➜ jscl git:(explore/react) ✗ 

L'inconvénient est que si blockchain.info commence à retourner des exploits... etc.