Automatically chdir to /vagrant on login

[unnawut]

Issue/Task Number: N/A

Overview

This might look silly but this has been annoying me for months. This PR automatically runs cd /vagrant when logging in to the VM from vagrant ssh.

Without it, each time I login to the VM, I need to type cd /vag + tab to not conflict with cd /var.

This is as energy-wasting as proof-of-work!

Changes

• Added cd /vagrant to .bashrc if it does not exist

Implementation Details

• Added a new Ansible task as bashrc.yml
• The file .bashrc already exists and we want to add cd /vagrant only if it doesn't exist. So we need to check using grep first, then add the line if grep produces no result.

Usage

From your goban directory on your host machine, run vagrant provision. The provisioning should complete successfully and you should see the following tasks completed:

TASK [commons : Find `cd /vagrant` line in .bashrc] ****************************
changed: [ewallet]

TASK [commons : add `cd /vagrant` to .bashrc if it doesn't exist yet] **********
changed: [ewallet]

Impact

Pull the latest commit. Run vagrant provision from your host machine.

[sirn]

Probably better to provide a default .bashrc as a file or template. I'll take a look at this later.

[unnawut]

There's a lot of goodies that comes with the original .bashrc though. Not sure if we want to maintain the file ourselves...

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
case $- in
    *i*) ;;
      *) return;;
esac

# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth

# append to the history file, don't overwrite it
shopt -s histappend

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# If set, the pattern "**" used in a pathname expansion context will
# match all files and zero or more directories and subdirectories.
#shopt -s globstar

# make less more friendly for non-text input files, see lesspipe(1)
#[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color|*-256color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_color_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
    # We have color support; assume it's compliant with Ecma-48
    # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
    # a case would tend to support setf rather than setaf.)
    color_prompt=yes
    else
    color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h: \w\a\]$PS1"
    ;;
*)
    ;;
esac

# enable color support of ls and also add handy aliases
if [ -x /usr/bin/dircolors ]; then
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)"
    alias ls='ls --color=auto'
    #alias dir='dir --color=auto'
    #alias vdir='vdir --color=auto'

    #alias grep='grep --color=auto'
    #alias fgrep='fgrep --color=auto'
    #alias egrep='egrep --color=auto'
fi

# colored GCC warnings and errors
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'

# some more ls aliases
#alias ll='ls -l'
#alias la='ls -A'
#alias l='ls -CF'

# Alias definitions.
# You may want to put all your additions into a separate file like
# ~/.bash_aliases, instead of adding them here directly.
# See /usr/share/doc/bash-doc/examples in the bash-doc package.

if [ -f ~/.bash_aliases ]; then
    . ~/.bash_aliases
fi

# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

[sirn]

The default .bashrc attempt to provides all kind of sane defaults for all terminal combination, so we can remove pretty much all of that since we provisioned the whole setup ourselves :-)

For a reference, my personal .bashrc looked like this before I switched to ZSH.

• bashrc
• bash_profile
• profile

[unnawut]

Right. The next question is probably ... what should we keep as our default? Especially when this project is likely used by a lot more people beyond the OMG team.

I'm ok to start with the default .bashrc though, plus the cd /vagrant. The colored prompt & colored ls is definitely useful to me.

[sirn]

I'd say something like this would be good enough defaults:

[[ $- != *i* ]] && return
[[ -s /etc/bash.bashrc ]] && source /etc/bash.bashrc
[[ -s ~/.bash_aliases ]] && source ~/.bash_aliases

shopt -s checkwinsize
shopt -s histappend
HISTCONTROL=ignoreboth
HISTSIZE=1000
HISTFILESIZE=2000

PS1="\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ "

alias ls='ls --color=auto'
alias ll='ls -l'
alias la='ls -A'
alias l='ls -CF'

alias grep='grep --color=auto'
alias fgrep='fgrep --color=auto'
alias egrep='egrep --color=auto'

[[ $- != *c* ]] && cd /vagrant