git Workspace Magic in bash
I have lots of projects in PyDev in Eclipse all of which I navigate through with the terminal in Ubuntu (this blog’s source is one of them), so just recently with the help of a couple co-workers I put together some bash methods for moving around my projects easily.
I found that the common pattern was:
jj@im-jj:~$ cd workspace/dashboard/src/
jj@im-jj:~/workspace/dashboard/src$ source environment/bin/activate
(environment)jj@im-jj:~/workspace/dashboard/src$ deactivate
jj@im-jj:~/workspace/dashboard/src$ cd ../../reportingdb/src/
jj@im-jj:~/workspace/reportingdb/src$ source environment/bin/activate
(environment)jj@im-jj:~/workspace/reportingdb/src$
The first thing I wanted was to know which project I was in and which branch in git that I was on. With a couple of helper methods this is actually pretty easy and just involves overwriting the PS1 environment variable.
# Git stuff:
function get_repository {
pwd | grep $HOME'/workspace/.*/src.*' | awk -F/ '{print "("$5")"}'
}
function get_branch {
git branch 2> /dev/null | grep \* | awk '{print "("$2")"}'
}
# Update PS1
PS1="\[\033[01;34m\]\$(get_repository)\[\033[31m\]\$(get_branch)\[\033[37m\]\[\033[00m\]\[\033[38m\]\u@\h:\w$ "
Now my prompt lets me know pretty acurately where I am in my source:
(environment)(dashboard)(master)jj@im-jj:~/workspace/dashboard/src$ git branch test
(environment)(dashboard)(master)jj@im-jj:~/workspace/dashboard/src$ git checkout test
Switched to branch 'test'
(environment)(dashboard)(test)jj@im-jj:~/workspace/dashboard/src$
The next thing I decided to add in was a command called `jumpto` which would deactivate whatever environment I’m in, jump into the proper directory, and then activate the current virtual environment for me to start working. Also, I wanted just `jumpto` with no arguments to bring me back to my home directory and exit out of any virtual environments.
The end result of this was the following:
function jumpto {
if [ -z "$1" ]; then
deactivate 2>/dev/null
cd $HOME
return 0
fi
local DIRECTORY=$HOME/workspace/$1/src
if [ -d $DIRECTORY ]; then
deactivate 2>/dev/null
cd $DIRECTORY
if [ -d $DIRECTORY/environment ]; then
source $DIRECTORY/environment/bin/activate
fi
else
echo "Invalid workspace! ($1)"
fi
}
This made moving around pretty easy:
jj@im-jj:~$ jumpto dashboard
(environment)(dashboard)(master)jj@im-jj:~/workspace/dashboard/src$ jumpto reportingdb
(environment)(reportingdb)(master)jj@im-jj:~/workspace/reportingdb/src$ jumpto
jj@im-jj:~$
The next thing I wanted was to do tab-completion based on the projects that I had set up in my `~/workspace/` directory. After some research on how tab completion works in the first place, I ended up with the following:
_jumpto() {
local IFS=$'\t\n'
local dirs=("$HOME/workspace/")
COMPREPLY=( $(
for dir in "${dirs}"; do
cd "$dir" 2 >/dev/null &&
compgen -d -- "${COMP_WORDS[COMP_CWORD]}"
done
) )
return 0
}
complete -o filenames -o nospace -F _jumpto jumpto
This lets me do things like `ju[tab] das[tab]` and end up in the dashboard project with the virtual environment all set up and ready to go.
I hope this helps somebody else out who’s working with lots of git projects with lots of different branches and virtual environments for each of them.
