dotfiles/dot_bashrc.d/executable_10.prompt.tmpl

#
# System Name and type detectedn
#
mySystem=$(uname -n)
if dnsdomainname &> /dev/null ; then
    myFQDN=$(uname -n).$(dnsdomainname)
else
    myFQDN=$(uname -n)
fi
myCategory="{{.bash.prompt.category}}"
myColor="{{.bash.prompt.color}}"
myType="{{.chezmoi.hostname}}"
{{ if eq .chezmoi.os "windows" -}}
myPrettyName="{{.chezmoi.os}}"
{{ else -}}
myPrettyName="{{.chezmoi.osRelease.prettyName}}"
{{ end -}}
myNum=0

# Helper functions go set colors with tput
function colf() {
    local color=$1
    tput setaf "$color"
}
function colb() {
    local color=$1
    tput setab "$color"
}
function res() {
    tput sgr0
}
# last exit code
function lastExitCode {
    local exit="$?"

    if [ $exit != 0 ];then
        # printf '\e[38;5;160m%-5s'  "✕ ❗ ($exit)"
        echo "$(colf 1)(⚡$exit)"
    else
        echo '✓'
    fi
}

# TODO: switch to use themes
# So far the colors used:
# - green (2) for directory
# - blue (4) for git prompt
# - red (1) for 'star'

# Color sequences must be escaped with '\[ ... \]
# See https://unix.stackexchange.com/questions/105958/terminal-prompt-not-wrapping-correctly
function hostPrompt() {
    local system=$1
    # echo "\[$(colf "$PROMPT_COLOR")\]░▒▓\[$(colb "$PROMPT_COLOR")\]\[$(colf 7)$(tput bold)\] $system \[$(res)$(colf "$PROMPT_COLOR")$(colb 7)\]▓▒░ \h"
    echo "$system \[\033[0;34m\]──\[\033[1;34m\] $myPrettyName\[\033[0;34m\]"
}
function statusPrompt() {
    local type=$1
    echo "\[$(colf "$PROMPT_COLOR")\]  \$(lastExitCode)\[$(colf "$PROMPT_COLOR")\]  $type \[$(res)\]\[$(colf 7)\]▓▒░"
}
function userPrompt() {
    echo "\[$(res)\]\[$(colf 2)\]\u@\h \[$(colf 1)\]☆ \[$(colf 2)\]\w \[$(colf 1)\]☆ \[$(colf 4)\]\$(parse_git_branch) "
}
function datePrompt() {
    # echo "\[$(colf 2)\]\D{%Y-%m-%d %H:%M:%S}"
    #echo "\[$(colf 2)  \]"
    echo "\[\033[1;34m\]\D{%Y-%m-%d %H:%M:%S}\[\033[0;34m\]"
}

function setPrompt() {
    local category=$1
    local type=$2
    PROMPT_COLOR=$3
    SYSTEM_PROMPT="$(hostPrompt "$category")"
    TYPE_PROMPT="$(statusPrompt "$type")"
    USER_PROMPT="$(userPrompt) "
    DATE="$(datePrompt)"
    PROMPT="${SYSTEM_PROMPT} ${TYPE_PROMPT}\n${USER_PROMPT}\n${DATE}"

    # PS1="${PROMPT} → \[$(res)\]"
    local LINECOL="\[\033[0;34m\]"
    local COL1="\[\033[1;32m\]"
    local COL2="\[\033[1;34m\]"
    local COL3="\[\033[1;36m\]"
    local CLEAR="\[\033[0;\]"

    local DIV="${LINECOL}──"
    local LINE1="${LINECOL}\n┌─ ${COL2}${category} ${DIV} ${COL2}${myPrettyName} ${DIV} ${DATE}"
    local LINE2="${LINECOL}\n├─ ${COL1}\u@\h ${DIV} ${COL1}\w ${CLEAR}"
    local LINE3="${LINECOL}\n└>  \$ \[\033[0m\]"
    PS1="$LINE1 $LINE2 $LINE3"
}

# example from http://stackoverflow.com/questions/4133904/ps1-line-with-git-current-branch-and-colors
function color_my_prompt {
    local __user_and_host="\[\033[01;32m\]\u@\h"
    local __cur_location="\[\033[01;34m\]\w"
    local __git_branch_color="\[\033[31m\]"
    #local __git_branch="\`ruby -e \"print (%x{git branch 2> /dev/null}.grep(/^\*/).first || '').gsub(/^\* (.+)$/, '(\1) ')\"\`"
    local __git_branch='`git branch 2> /dev/null | grep -e ^* | sed -E  s/^\\\\\*\ \(.+\)$/\(\\\\\1\)\ /`'
    local __prompt_tail="\[\033[35m\]$"
    local __last_color="\[\033[00m\]"
    export PS1="$__user_and_host $__cur_location $__git_branch_color$__git_branch$__prompt_tail$__last_color "
}

function parse_git_branch {
    # echo -n $(git branch --no-color 2>/dev/null | awk -v out=$1 '/^*/ { if(out=="") print $2; else print out}')

    git_branch="$(git branch 2> /dev/null | grep -e ^* | sed -E  s/^\\\*\ \(.+\)$/\(\ \\\1\)\ /)"
    if [ -z "$git_branch" ];
    then
        git_branch="(no git branch) "
    else
        local git_dir="$(git rev-parse --git-dir)"
        if [ -f $git_dir/logs/refs/stash ];
        then
            local git_stash="$(wc -l $git_dir/logs/refs/stash | sed -E 's/^([0-9]+).*/\1/')"
        else
            local git_stash="0"
        fi
        if [ $git_stash -gt 0 ];
        then
            git_branch=$(echo $git_branch | sed -E "s/^(.*)\)$/\1\|stash:${git_stash}\)/")
        fi
    fi
    echo -n -e "$git_branch"
}

# fast version form https://stackoverflow.com/questions/4485059/git-bash-is-extremely-slow-on-windows-7-x64
fast_git_ps1 ()
{
    printf -- "$(git branch 2>/dev/null | sed -ne '/^\* / s/^\* \(.*\)/ [\1] / p')"
}

# Set backgroud color of prompt, default to magenta
# Color       #define       Value       RGB
# black     COLOR_BLACK       0     0, 0, 0
# red       COLOR_RED         1     max,0,0
# green     COLOR_GREEN       2     0,max,0
# yellow    COLOR_YELLOW      3     max,max,0
# blue      COLOR_BLUE        4     0,0,max
# magenta   COLOR_MAGENTA     5     max,0,max
# cyan      COLOR_CYAN        6     0,max,max
# white     COLOR_WHITE       7     max,max,max
# setPrompt "${myCategory}" "${myPrettyName}" "${myColor:-5}"

if [[ -z "${myType// }" ]]; then
    TYPE=$(uname -n)
else
    TYPE=" $myType "
fi

if command -v 2>&1 >/dev/null; then
    echo "Found starship, using it"
    STARSHIP_EXEC="$(which starship)"
    eval "$($STARSHIP_EXEC init bash)"
else
    echo "No starship, using custom PS1"
    setPrompt "${myCategory}" "${myPrettyName}" ${myColor:-6}
fi


# color_my_prompt
# TODO: background colors...
# TODO: private history file for shared accounts
# TODO: vim