.bashrc_git

__git_printf_supports_v=
printf -v __git_printf_supports_v -- '%s' yes >/dev/null 2>&1

__git_ps1_show_upstream ()
{
	local key value
	local svn_remote svn_url_pattern count n
	local upstream=git legacy="" verbose="" name=""

	svn_remote=()
	# get some config options from git-config
	local output="$(git config -z --get-regexp '^(svn-remote\..*\.url|bash\.showupstream)$' 2>/dev/null | tr '\0\n' '\n ')"
	while read -r key value; do
		case "$key" in
		bash.showupstream)
			GIT_PS1_SHOWUPSTREAM="$value"
			if [[ -z "${GIT_PS1_SHOWUPSTREAM}" ]]; then
				p=""
				return
			fi
			;;
		svn-remote.*.url)
			svn_remote[$((${#svn_remote[@]} + 1))]="$value"
			svn_url_pattern="$svn_url_pattern\\|$value"
			upstream=svn+git # default upstream is SVN if available, else git
			;;
		esac
	done <<< "$output"

	# parse configuration values
	for option in ${GIT_PS1_SHOWUPSTREAM}; do
		case "$option" in
		git|svn) upstream="$option" ;;
		verbose) verbose=1 ;;
		legacy)  legacy=1  ;;
		name)    name=1 ;;
		esac
	done

	# Find our upstream
	case "$upstream" in
	git)    upstream="@{upstream}" ;;
	svn*)
		# get the upstream from the "git-svn-id: ..." in a commit message
		# (git-svn uses essentially the same procedure internally)
		local -a svn_upstream
		svn_upstream=($(git log --first-parent -1 \
					--grep="^git-svn-id: \(${svn_url_pattern#??}\)" 2>/dev/null))
		if [[ 0 -ne ${#svn_upstream[@]} ]]; then
			svn_upstream=${svn_upstream[${#svn_upstream[@]} - 2]}
			svn_upstream=${svn_upstream%@*}
			local n_stop="${#svn_remote[@]}"
			for ((n=1; n <= n_stop; n++)); do
				svn_upstream=${svn_upstream#${svn_remote[$n]}}
			done

			if [[ -z "$svn_upstream" ]]; then
				# default branch name for checkouts with no layout:
				upstream=${GIT_SVN_ID:-git-svn}
			else
				upstream=${svn_upstream#/}
			fi
		elif [[ "svn+git" = "$upstream" ]]; then
			upstream="@{upstream}"
		fi
		;;
	esac

	# Find how many commits we are ahead/behind our upstream
	if [[ -z "$legacy" ]]; then
		count="$(git rev-list --count --left-right \
				"$upstream"...HEAD 2>/dev/null)"
	else
		# produce equivalent output to --count for older versions of git
		local commits
		if commits="$(git rev-list --left-right "$upstream"...HEAD 2>/dev/null)"
		then
			local commit behind=0 ahead=0
			for commit in $commits
			do
				case "$commit" in
				"<"*) ((behind++)) ;;
				*)    ((ahead++))  ;;
				esac
			done
			count="$behind	$ahead"
		else
			count=""
		fi
	fi

	# calculate the result
	if [[ -z "$verbose" ]]; then
		case "$count" in
		"") # no upstream
			p="" ;;
		"0	0") # equal to upstream
			p="=" ;;
		"0	"*) # ahead of upstream
			p=">" ;;
		*"	0") # behind upstream
			p="<" ;;
		*)	    # diverged from upstream
			p="<>" ;;
		esac
	else
		case "$count" in
		"") # no upstream
			p="" ;;
		"0	0") # equal to upstream
			p=" u=" ;;
		"0	"*) # ahead of upstream
			p=" u+${count#0	}" ;;
		*"	0") # behind upstream
			p=" u-${count%	0}" ;;
		*)	    # diverged from upstream
			p=" u+${count#*	}-${count%	*}" ;;
		esac
		if [[ -n "$count" && -n "$name" ]]; then
			__git_ps1_upstream_name=$(git rev-parse \
				--abbrev-ref "$upstream" 2>/dev/null)
			if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
				p="$p \${__git_ps1_upstream_name}"
			else
				p="$p ${__git_ps1_upstream_name}"
				# not needed anymore; keep user's
				# environment clean
				unset __git_ps1_upstream_name
			fi
		fi
	fi

}

# Helper function that is meant to be called from __git_ps1.  It
# injects color codes into the appropriate gitstring variables used
# to build a gitstring.
__git_ps1_colorize_gitstring ()
{
	if [[ -n ${ZSH_VERSION-} ]]; then
		local c_red='%F{red}'
		local c_green='%F{green}'
		local c_lblue='%F{blue}'
		local c_clear='%f'
	else
		# Using \[ and \] around colors is necessary to prevent
		# issues with command line editing/browsing/completion!
		local c_red='\[\e[31m\]'
		local c_green='\[\e[32m\]'
		local c_lblue='\[\e[1;34m\]'
		local c_clear='\[\e[0m\]'
	fi
	local bad_color=$c_red
	local ok_color=$c_green
	local flags_color="$c_lblue"

	local branch_color=""
	if [ $detached = no ]; then
		branch_color="$ok_color"
	else
		branch_color="$bad_color"
	fi
	c="$branch_color$c"

	z="$c_clear$z"
	if [ "$w" = "*" ]; then
		w="$bad_color$w"
	fi
	if [ -n "$i" ]; then
		i="$ok_color$i"
	fi
	if [ -n "$s" ]; then
		s="$flags_color$s"
	fi
	if [ -n "$u" ]; then
		u="$bad_color$u"
	fi
	r="$c_clear$r"
}

__git_eread ()
{
	local f="$1"
	shift
	test -r "$f" && read "$@" <"$f"
}

__git_ps1 ()
{
	# preserve exit status
	local exit=$?
	local pcmode=no
	local detached=no
	local ps1pc_start='\u@\h:\w '
	local ps1pc_end='\$ '
	local printf_format=' (%s)'

	case "$#" in
		2|3)	pcmode=yes
			ps1pc_start="$1"
			ps1pc_end="$2"
			printf_format="${3:-$printf_format}"
			PS1="$ps1pc_start$ps1pc_end"
		;;
		0|1)	printf_format="${1:-$printf_format}"
		;;
		*)	return $exit
		;;
	esac

	local ps1_expanded=yes
	[ -z "${ZSH_VERSION-}" ] || [[ -o PROMPT_SUBST ]] || ps1_expanded=no
	[ -z "${BASH_VERSION-}" ] || shopt -q promptvars || ps1_expanded=no

	local repo_info rev_parse_exit_code
	repo_info="$(git rev-parse --git-dir --is-inside-git-dir \
		--is-bare-repository --is-inside-work-tree \
		--short HEAD 2>/dev/null)"
	rev_parse_exit_code="$?"

	if [ -z "$repo_info" ]; then
		return $exit
	fi

	local short_sha=""
	if [ "$rev_parse_exit_code" = "0" ]; then
		short_sha="${repo_info##*$'\n'}"
		repo_info="${repo_info%$'\n'*}"
	fi
	local inside_worktree="${repo_info##*$'\n'}"
	repo_info="${repo_info%$'\n'*}"
	local bare_repo="${repo_info##*$'\n'}"
	repo_info="${repo_info%$'\n'*}"
	local inside_gitdir="${repo_info##*$'\n'}"
	local g="${repo_info%$'\n'*}"

	if [ "true" = "$inside_worktree" ] &&
	   [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
	   [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
	   git check-ignore -q .
	then
		return $exit
	fi

	local r=""
	local b=""
	local step=""
	local total=""
	if [ -d "$g/rebase-merge" ]; then
		__git_eread "$g/rebase-merge/head-name" b
		__git_eread "$g/rebase-merge/msgnum" step
		__git_eread "$g/rebase-merge/end" total
		if [ -f "$g/rebase-merge/interactive" ]; then
			r="|REBASE-i"
		else
			r="|REBASE-m"
		fi
	else
		if [ -d "$g/rebase-apply" ]; then
			__git_eread "$g/rebase-apply/next" step
			__git_eread "$g/rebase-apply/last" total
			if [ -f "$g/rebase-apply/rebasing" ]; then
				__git_eread "$g/rebase-apply/head-name" b
				r="|REBASE"
			elif [ -f "$g/rebase-apply/applying" ]; then
				r="|AM"
			else
				r="|AM/REBASE"
			fi
		elif [ -f "$g/MERGE_HEAD" ]; then
			r="|MERGING"
		elif [ -f "$g/CHERRY_PICK_HEAD" ]; then
			r="|CHERRY-PICKING"
		elif [ -f "$g/REVERT_HEAD" ]; then
			r="|REVERTING"
		elif [ -f "$g/BISECT_LOG" ]; then
			r="|BISECTING"
		fi

		if [ -n "$b" ]; then
			:
		elif [ -h "$g/HEAD" ]; then
			# symlink symbolic ref
			b="$(git symbolic-ref HEAD 2>/dev/null)"
		else
			local head=""
			if ! __git_eread "$g/HEAD" head; then
				return $exit
			fi
			# is it a symbolic ref?
			b="${head#ref: }"
			if [ "$head" = "$b" ]; then
				detached=yes
				b="$(
				case "${GIT_PS1_DESCRIBE_STYLE-}" in
				(contains)
					git describe --contains HEAD ;;
				(branch)
					git describe --contains --all HEAD ;;
				(tag)
					git describe --tags HEAD ;;
				(describe)
					git describe HEAD ;;
				(* | default)
					git describe --tags --exact-match HEAD ;;
				esac 2>/dev/null)" ||

				b="$short_sha..."
				b="($b)"
			fi
		fi
	fi

	if [ -n "$step" ] && [ -n "$total" ]; then
		r="$r $step/$total"
	fi

	local w=""
	local i=""
	local s=""
	local u=""
	local c=""
	local p=""

	if [ "true" = "$inside_gitdir" ]; then
		if [ "true" = "$bare_repo" ]; then
			c="BARE:"
		else
			b="GIT_DIR!"
		fi
	elif [ "true" = "$inside_worktree" ]; then
		if [ -n "${GIT_PS1_SHOWDIRTYSTATE-}" ] &&
		   [ "$(git config --bool bash.showDirtyState)" != "false" ]
		then
			git diff --no-ext-diff --quiet || w="*"
			git diff --no-ext-diff --cached --quiet || i="+"
			if [ -z "$short_sha" ] && [ -z "$i" ]; then
				i="#"
			fi
		fi
		if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
		   git rev-parse --verify --quiet refs/stash >/dev/null
		then
			s="$"
		fi

		if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
		   [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
		   git ls-files --others --exclude-standard --directory --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null
		then
			u="%${ZSH_VERSION+%}"
		fi

		if [ -n "${GIT_PS1_SHOWUPSTREAM-}" ]; then
			__git_ps1_show_upstream
		fi
	fi

	local z="${GIT_PS1_STATESEPARATOR-" "}"

	# NO color option unless in PROMPT_COMMAND mode
	if [ $pcmode = yes ] && [ -n "${GIT_PS1_SHOWCOLORHINTS-}" ]; then
		__git_ps1_colorize_gitstring
	fi

	b=${b##refs/heads/}
	if [ $pcmode = yes ] && [ $ps1_expanded = yes ]; then
		__git_ps1_branch_name=$b
		b="\${__git_ps1_branch_name}"
	fi

	local f="$w$i$s$u"
	local gitstring="$c$b${f:+$z$f}$r$p"

	if [ $pcmode = yes ]; then
		if [ "${__git_printf_supports_v-}" != yes ]; then
			gitstring=$(printf -- "$printf_format" "$gitstring")
		else
			printf -v gitstring -- "$printf_format" "$gitstring"
		fi
		PS1="$ps1pc_start$gitstring$ps1pc_end"
	else
		printf -- "$printf_format" "$gitstring"
	fi

	return $exit
}