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clarkema/gist:9c43b8862ffe71e1d4f4

Created January 12, 2015 19:18
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  1. clarkema created this gist Jan 12, 2015.
    138 changes: 138 additions & 0 deletions gistfile1.sh
    View file
    Original file line number Diff line number Diff line change
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    # resolve_path from here https://github.com/keen99/shell-functions/tree/master/resolve_path
    resolve_path() {
    #I'm bash only, please!
    # usage: resolve_path <a file or directory>
    # follows symlinks and relative paths, returns a full real path
    #
    local owd="$PWD"
    #echo "$FUNCNAME for $1" >&2
    local opath="$1"
    local npath=""
    local obase=$(basename "$opath")
    local odir=$(dirname "$opath")
    if [[ -L "$opath" ]]
    then
    #it's a link.
    #file or directory, we want to cd into it's dir
    cd $odir
    #then extract where the link points.
    npath=$(readlink "$obase")
    #have to -L BEFORE we -f, because -f includes -L :(
    if [[ -L $npath ]]
    then
    #the link points to another symlink, so go follow that.
    resolve_path "$npath"
    #and finish out early, we're done.
    return $?
    #done
    elif [[ -f $npath ]]
    #the link points to a file.
    then
    #get the dir for the new file
    nbase=$(basename $npath)
    npath=$(dirname $npath)
    cd "$npath"
    ndir=$(pwd -P)
    retval=0
    #done
    elif [[ -d $npath ]]
    then
    #the link points to a directory.
    cd "$npath"
    ndir=$(pwd -P)
    retval=0
    #done
    else
    echo "$FUNCNAME: ERROR: unknown condition inside link!!" >&2
    echo "opath [[ $opath ]]" >&2
    echo "npath [[ $npath ]]" >&2
    return 1
    fi
    else
    if ! [[ -e "$opath" ]]
    then
    echo "$FUNCNAME: $opath: No such file or directory" >&2
    return 1
    #and break early
    elif [[ -d "$opath" ]]
    then
    cd "$opath"
    ndir=$(pwd -P)
    retval=0
    #done
    elif [[ -f "$opath" ]]
    then
    cd $odir
    ndir=$(pwd -P)
    nbase=$(basename "$opath")
    retval=0
    #done
    else
    echo "$FUNCNAME: ERROR: unknown condition outside link!!" >&2
    echo "opath [[ $opath ]]" >&2
    return 1
    fi
    fi
    #now assemble our output
    echo -n "$ndir"
    if [[ "x${nbase:=}" != "x" ]]
    then
    echo "/$nbase"
    else
    echo
    fi
    #now return to where we were
    cd "$owd"
    return $retval
    }

    #=======================================================================
    # Git-ified prompt {{{
    #=======================================================================

    default_prompt="\u@\h:\w ${vcs_info_msg_0_}> "
    function prompt_setup() {
    local git_branch=$(parse_git_branch)
    local gitcolor gitcolor_new gitcolor_old reset
    reset='\e[0m'

    if [[ -n "$git_branch" ]]; then
    git_clean_p
    if [[ $? == 0 ]]; then
    if [[ "$git_branch" == "master" ]]; then
    gitcolor='\e[1;33m' # Yellow
    else
    gitcolor='\e[1;32m' # Green
    fi
    else
    gitcolor='\e[1;31m' # Red
    fi

    PS1="$(path_within_git_repo):$gitcolor$git_branch$reset> "
    else
    PS1=$default_prompt
    fi
    }

    function parse_git_branch ()
    {
    local ref=$(git symbolic-ref HEAD 2> /dev/null) || return 1
    echo ${ref#refs/heads/}
    }

    function path_within_git_repo ()
    {
    local repo_base=$(resolve_path $( git rev-parse --git-dir ))
    local repo_parent=$(dirname $(dirname ${repo_base}))
    echo ${PWD##$repo_parent/}
    }

    # Exit value of 0 if the repo is clean, 1 otherwise
    function git_clean_p ()
    {
    git status 2> /dev/null | fgrep 'working directory clean' > /dev/null
    }

    PROMPT_COMMAND=prompt_setup
    # }}}