include my bash prompt customization

optional, can be enabled if you set in your ~/.bashrc:
PROMPT_COMMAND=__bash_prompt_command

diff --git a/shrc.sh b/shrc.sh
index a15e0e5a72b95b1063737822dd6af7c7e64b7e9b..05ec24ca5db1c2e26a877ed3fefdfc44c6f1e68d 100755 (executable)
--- a/shrc.sh
+++ b/shrc.sh
@@ -262,3 +262,72 @@ d() {
 rpm2spec() {
        sed -re 's,^(.+)-[^-]+-[^-]+$,\1.spec,'
 }
+
+
+#
+# A colorized bash prompt
+# - shows curret branch
+# - shows if branch is up to date/ahead/behind
+# - shows if last command exited with error (red)
+#
+# To use it, set $PROMPT_COMMAND env var:
+# PROMPT_COMMAND=__bash_prompt_command
+#
+__bash_prompt_command() {
+       local previous_return_value=$?
+
+       local RED="\[\033[0;31m\]"
+       local YELLOW="\[\033[0;33m\]"
+       local GREEN="\[\033[0;32m\]"
+       local BLUE="\[\033[0;34m\]"
+       local LIGHT_RED="\[\033[1;31m\]"
+       local LIGHT_GREEN="\[\033[1;32m\]"
+       local WHITE="\[\033[1;37m\]"
+       local LIGHT_GRAY="\[\033[0;37m\]"
+       local COLOR_NONE="\[\e[0m\]"
+
+       local prompt="${BLUE}[${RED}\w${GREEN}$(__bash_parse_git_branch)${BLUE}]${COLOR_NONE} "
+       if [ $previous_return_value -eq 0 ]; then
+               PS1="${prompt}➔ "
+       else
+               PS1="${prompt}${RED}➔${COLOR_NONE} "
+       fi
+}
+
+# helper for __bash_prompt_command
+# command line (git) coloring
+# note we use "\" here to avoid any "git" previous alias/func
+__bash_parse_git_branch() {
+       # not in git dir. return early
+       \git rev-parse --git-dir &> /dev/null || return
+
+       local git_status branch_pattern remote_pattern diverge_pattern
+       local state remote branch
+
+       git_status=$(\git -c color.ui=no status 2> /dev/null)
+       branch_pattern="^On branch ([^${IFS}]*)"
+       remote_pattern="Your branch is (behind|ahead) "
+       diverge_pattern="Your branch and (.*) have diverged"
+
+       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 [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
+                       remote="${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]}
+               echo " (${branch})${remote}${state}"
+       fi
+}