NOTE: I am using 14.04. Your mileage may vary.
Reduce the size of the prompt
This simple trick checks if the length of the current directory path is greater than 30. In that case, it breaks it up into two chunks -- first 12 letters and the last 15.__update_prompt1()
{
DIR=`pwd | sed -e "s!$HOME!~!"`
if [ ${#DIR} -gt 30 ]; then
CurDir=${DIR:0:12}....${DIR:${#DIR}-15}
else
CurDir=$DIR
fi
} Before:
[user@hostname:/local/mnt/workspace/somefolder1/foldera/test]$After:
[user@hostname:/local/mnt/w....a/test/]$Personally, I like the one below. It replaces the folder names with a single letter.
__update_prompt2()
{
CurDir=`pwd | sed -e "s!$HOME!~!" | sed -re "s!([^/])[^/]+/!\1/!g"`
} Before:
[user@hostname:/local/mnt/workspace/somefolder1/foldera/test]$After:
[user@hostname:/l/m/w/s/f/test]$All we need to do is update the
PROMPT_COMMAND and PS1
PROMPT_COMMAND=__update_prompt2
export PROMPT_COMMAND=${PROMPT_COMMAND}
PS1='[\u@\h:${CurDir}]\$ '
export PS1 There is one other thing I like to do -- move the cursor to the newline
PS1='[\u@\h:${CurDir}]\n\$ 'The prompt looks like,
[user@hostname:/l/m/w/s/f/test]
$ ls
Adding git branch information to prompt along with git completion
First things first, download the
git-completion.bash and git-prompt.sh files from https://github.com/git/git/tree/master/contrib/completionAdd these do the
.bashrcsource ~/.git-completion.bash
source ~/.git-prompt.sh And finally, update the
PS1PS1='[\u@\h:${CurDir}]$(__git_ps1 " (%s)")\n\$ 'When the folder is a git repository it will automatically show the current git branch.
[user@hostname:/l/m/w/s/f/myrepo] (master)
$ ls -a
. .. .git hello You get git completion for free as well.
[user@hostname:/l/m/w/s/f/myrepo] (master)
$ git che [TAB]
check-mailmap checkout cherry cherry-pickPreserving the history across terminals
This can be done in three simple steps
history -a: Append the new history lines (history lines entered since the beginning of the current Bash session) to the history filehistory -c: Clear the history list. This may be combined with the other options to replace the history list completelyhistory -r: Read the history file and append its contents to the history list
Let's do this part of the
PROMPT_COMMAND
PROMPT_COMMAND=__update_prompt2
export PROMPT_COMMAND="history -a; history -c; history -r; ${PROMPT_COMMAND}"
That's it!
