bash: add .bash_prompt

.bash_prompt

@@ -0,0 +1,114 @@
+#!/bin/bash
+
+########################################################################
+# Matthew's Git Bash Prompt
+# +
+# python virtualenv
+########################################################################
+         RED="\[\033[0;31m\]"
+      YELLOW="\[\033[0;33m\]"
+       GREEN="\[\033[0;32m\]"
+        BLUE="\[\033[0;34m\]"
+   LIGHT_RED="\[\033[1;31m\]"
+ LIGHT_GREEN="\[\033[1;32m\]"
+LIGHT_YELLOW="\[\033[1;33m\]"
+       WHITE="\[\033[1;37m\]"
+  LIGHT_GRAY="\[\033[0;37m\]"
+  COLOR_NONE="\[\e[0m\]"
+
+function _my_parse_git_branch {
+  git rev-parse --git-dir &> /dev/null
+  local git_status="$(LANG=C git status 2> /dev/null)"
+  local branch_pattern="^On branch ([^${IFS}]*)"
+  local remote_pattern="Your branch is (.*) '"
+  local diverge_pattern="Your branch and (.*) have diverged"
+  local state=""
+  local remote=""
+  local branch=""
+
+  [[ ${git_status} =~ "Not a git repository" ]] && return
+  
+  if [[ ! ${git_status} =~ "working directory clean" ]]; then
+    state="${RED}⚡"
+  fi
+  # add an else if or two here if you want to get more specific
+  if [[ ${git_status} =~ ${remote_pattern} ]]; then
+    if [[ ${BASH_REMATCH[1]} == "ahead of" ]]; then
+      remote="${YELLOW}↑"
+    else
+      remote="${YELLOW}↓"
+    fi
+  fi
+  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
+    remote="${YELLOW}↕"
+  fi
+  if [[ ${git_status} =~ ${branch_pattern} ]]; then
+    branch=${BASH_REMATCH[1]}
+    #branch=$(__git_ps1)
+    echo "${BLUE}[${GREEN}(${branch})${remote}${state}${BLUE}]${COLOR_NONE}"
+  fi
+  # echo "DEBUG[branch:$branch|remote:$remote|state:$state]"
+}
+
+function prompt_func() {
+    previous_return_value=$?;
+
+	## BASH : enable shared history
+    ## DONT DO THAT : DANGEROUS
+    #history -a; history -c; history -r
+
+    # the prompt craft
+    local prompt=''
+
+    #The lowercase w is the full current working directory
+    # prompt="${TITLEBAR}${BLUE}[${RED}\w${GREEN}$(_my_parse_git_branch)${BLUE}]${COLOR_NONE}"
+
+    # [user$host]
+    prompt="${prompt}${COLOR_NONE}[${YELLOW}\u${COLOR_NONE}@${WHITE}\h${COLOR_NONE}]"
+
+    # python virtualenv
+    test -n "$VIRTUAL_ENV" && prompt="${prompt} (env:${BLUE}$(basename $VIRTUAL_ENV)${COLOR_NONE})"
+
+    # git status
+    test -n "$(_my_parse_git_branch)" && prompt="${prompt}[git:${GREEN}$(_my_parse_git_branch)${COLOR_NONE}]"
+
+    # add -- \w (git branch) if new minute or cd
+    # [[ "x$previous_path" != "x$(pwd)" ]] ||  [[  "$previous_minute" != "$(date +%M)" ]] && prompt="$prompt $(_my_parse_git_branch) -- $(date +%a\ %d\ %B)"
+
+    # date
+    # prompt="$prompt -- $(date +%a\ %d\ %B)"
+
+    # hour
+    prompt="$prompt ${LIGHT_YELLOW}$(date +%R)${COLOR_NONE}"
+    # add, at least the time
+    # prompt="${prompt} $(date +%X)"
+    
+    # PWD
+    prompt="${prompt} \w"
+
+    # if test $previous_return_value -eq 0
+    # then
+    #     PS1="${prompt} ${GREEN}\$${COLOR_NONE} "
+    # else
+    #     PS1="${prompt} ${RED}(err=${previous_return_value}) \$${COLOR_NONE} "
+    # fi
+
+    # test right align FIXME
+    # PS1=$(printf "%${COLUMNS}s                                   \r%s" "${prompt}" "${GREEN}\$${COLOR_NONE} ")
+
+    # red/green if exit 1/0
+    if test $previous_return_value -eq 0
+    then
+        PS1="${prompt} ${GREEN}\$${COLOR_NONE} "
+    else
+        PS1="${prompt} ${RED}(err=${previous_return_value}) \$${COLOR_NONE} "
+    fi
+
+    previous_minute="$(date +%M)"
+    previous_path=$(pwd)
+
+    # set xterm -like title
+    echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD}\007"
+}
+
+PROMPT_COMMAND=prompt_func