MyBashrc/.bashrc

#
# ~/.bashrc
#

[[ $- != *i* ]] && return

# mkdircd - create directory and change current directory to created one
# usage mkdircd <new_directory>
mkdircd () {
    mkdir -p $1
    cd $1
}


# ex - archive extractor
# usage: ex <file>
ex ()
{
    if [ -f $1 ] ; then
        case $1 in
            *.tar.bz2)   tar xjf $1   ;;
            *.tar.gz)    tar xzf $1   ;;
            *.bz2)       bunzip2 $1   ;;
            *.rar)       unrar x $1     ;;
            *.gz)        gunzip $1    ;;
            *.tar)       tar xf $1    ;;
            *.tbz2)      tar xjf $1   ;;
            *.tgz)       tar xzf $1   ;;
            *.zip)       unzip $1     ;;
            *.Z)         uncompress $1;;
            *.7z)        7z x $1      ;;
            *)           echo "'$1' cannot be extracted via ex()" ;;
        esac
    else
        echo "'$1' is not a valid file"
    fi
}

use_color=true

# highlight results of common Unix commands
safe_term=${TERM//[^[:alnum:]]/?}   # sanitize TERM
match_lhs=""
[[ -f ~/.dir_colors   ]] && match_lhs="${match_lhs}$(<~/.dir_colors)"
[[ -f /etc/DIR_COLORS ]] && match_lhs="${match_lhs}$(</etc/DIR_COLORS)"
[[ -z ${match_lhs}    ]] \
    && type -P dircolors >/dev/null \
    && match_lhs=$(dircolors --print-database)
[[ $'\n'${match_lhs} == *$'\n'"TERM "${safe_term}* ]] && use_color=true

if ${use_color} ; then
	# Enable colors for ls, etc.  Prefer ~/.dir_colors #64489
    if type -P dircolors >/dev/null ; then
        if [[ -f ~/.dir_colors ]] ; then
            eval $(dircolors -b ~/.dir_colors)
        elif [[ -f /etc/DIR_COLORS ]] ; then
            eval $(dircolors -b /etc/DIR_COLORS)
        fi
    fi

    alias ls='ls --color=auto'
    alias ll='ls -lhA --color=auto'
    alias grep='grep --colour=auto'
    alias egrep='egrep --colour=auto'
    alias fgrep='fgrep --colour=auto'
else 
    alias ll='ls -lhA'
fi
[ -r /usr/share/bash-completion/bash_completion ] && . /usr/share/bash-completion/bash_completion
unset use_color safe_term match_lhs sh

# aliases for common Unix commands
alias cp="cp -i"                          # confirm before overwriting something
alias df='df -h'                          # human-readable sizes
alias free='free -m'                      # show sizes in MB

# Bash won't get SIGWINCH if another process is in the foreground.
# Enable checkwinsize so that bash will check the terminal size when
# it regains control.  #65623
# http://cnswww.cns.cwru.edu/~chet/bash/FAQ (E11)
shopt -s checkwinsize
shopt -s expand_aliases

# Enable history appending instead of overwriting.  #139609
shopt -s histappend

# A two-line colored Bash prompt (PS1) with Git branch and a line decoration
# which adjusts automatically to the width of the terminal.
# Recognizes and shows Git, SVN and Fossil branch/revision.
# Screenshot: http://img194.imageshack.us/img194/2154/twolineprompt.png
# Michal Kottman, 2012
 
RESET="\[\033[0m\]"
RED="\[\033[0;31m\]"
GREEN="\[\033[01;32m\]"
BLUE="\[\033[01;34m\]"
YELLOW="\[\033[0;33m\]"

function parse_git_branch {
    PS_BRANCH=''
    if [ -d .svn ]; then
        PS_BRANCH="(svn r$(svn info|awk '/Revision/{print $2}'))"
        return
    elif [ -f _FOSSIL_ -o -f .fslckout ]; then
        PS_BRANCH="(fossil $(fossil status|awk '/tags/{print $2}')) "
        return
    fi
    ref=$(git symbolic-ref HEAD 2> /dev/null) || return
    PS_BRANCH="(git ${ref#refs/heads/}) "
}
PROMPT_COMMAND=parse_git_branch
PS_INFO="$GREEN\u@\h$RESET:$BLUE\w"
PS_GIT="$YELLOW\$PS_BRANCH"
PS_TIME="\[\033[\$((COLUMNS-10))G\] $RED[\t]"

# \u2554, \u255A -> box-shaping characters
export PS1="╔═ ${PS_INFO} ${PS_GIT}${PS_TIME}\n${RESET}╚═ \$ "

# alias code = codium for case if codium is installed
if ! command -v "code" &> /dev/null ; then
    if command -v "codium" &> /dev/null ; then
        alias code='codium'
    fi    
fi