git-rstatus

#!/bin/bash

## read input, display help if necessary
if [[ "$@" == *--help* ]]; then
    cat<<EOF
 Recursive status

 This command shows a brief summary about the status of 
 the repository and all the submodules.

 Usage:
    git rstatus
EOF
    exit 0;
fi

## from the git mailinglist:
function git
{
    LC_MESSAGES=C command git "$@"
} 
export git

. "$(git --exec-path)/git-sh-setup"

cd_to_toplevel
superrepo=$(pwd)
tmpdir=$(mktemp -d)

cleanup () {
	test -d "$tmpdir" && rm -rf "$tmpdir"
}

trap cleanup EXIT ERR

export superrepo tmpdir

upstream_status ()
{
	# Find how many commits we are ahead/behind our upstream
	count="$(git rev-list --count --left-right "@{upstream}"...HEAD 2>/dev/null)"

	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
}


worktree_index_status ()
{
	local g="$(git rev-parse --git-dir 2>/dev/null)"
	w=""
	i=""
	s=""
	u=""
	c=""
	r=""
	b=""

	if [ -z "$g" ]; then
		b="DAMAGED! Consult Manu."
		return
	fi
	if [ -f "$g/rebase-merge/interactive" ]; then
		r="REBASE-i"
		b="$(cat "$g/rebase-merge/head-name")"
	elif [ -d "$g/rebase-merge" ]; then
		r="REBASE-m"
		b="$(cat "$g/rebase-merge/head-name")"
	else
		if [ -d "$g/rebase-apply" ]; then
			if [ -f "$g/rebase-apply/rebasing" ]; then
				r="REBASE"
			elif [ -f "$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/BISECT_LOG" ]; then
			r="BISECTING"
		fi

		b="$(git symbolic-ref HEAD 2>/dev/null)" || {
			b="$(git describe --tags --exact-match HEAD 2>/dev/null)" ||
			b="$(cut -c1-7 "$g/HEAD" 2>/dev/null)..." ||
			b="unknown"
			b="($b)"
		}
	fi

	if [ "true" = "$(git rev-parse --is-inside-git-dir 2>/dev/null)" ]; then
		if [ "true" = "$(git rev-parse --is-bare-repository 2>/dev/null)" ]; then
			c="BARE!"
		else
			b="GIT_DIR!"
		fi
	elif [ "true" = "$(git rev-parse --is-inside-work-tree 2>/dev/null)" ]; then
		(git diff --no-ext-diff --quiet --exit-code --ignore-submodules=dirty) || w="*"
		if (git rev-parse --quiet --verify HEAD >/dev/null) ; then
			(git diff-index --cached --quiet HEAD --) || i="+"
		else
			i="#"
		fi
		git rev-parse --verify refs/stash >/dev/null 2>&1 && s="$"

		if [ -n "$(git ls-files --others --exclude-standard)" ]; then
			u="%"
		fi
	fi

	# local f="$w$i$s$u"
	b="${b##refs/heads/}"
}

do_one_status () {
	outf=$(mktemp --tmpdir="$tmpdir" 2>/dev/null)
	name="$1"
	path="$2"
	toplevel="$3"
	mypath="${toplevel#$superrepo}/$path"
	mypath="${mypath#/}"
	cd "$toplevel/$path"
	
	upstream_status
	worktree_index_status
	printf "%-20s %1s%1s%1s%1s %-6s %-20s %-15s\n" "$mypath" "$w" "$i" "$s" "$u" "$p" "$b" "$c$r" >"$outf"
}

export -f do_one_status upstream_status worktree_index_status

git submodule foreach --quiet --recursive 'echo "$name $path $toplevel"' |
xargs -r -n3 -P20 bash -c 'do_one_status "$@"' do_one_status

printf "%-20s %1s%1s%1s%1s %-6s %-20s %-15s\n" SUBMODULE W I S U "<>" HEAD state
cat "$tmpdir"/* | sort