# A tool for managing multiple git projects quickly. Simply source this in your bashrc or zshrc.
# This assumes a common directory that contains all projects. Subfolders are detected as well.
# You can set $projects_dir before or after sourcing this script, or adjust it below.
# The standard command I execute daily is "p status", it updates all projects and shows their status.

# Common root for all projects
projects_dir=${projects_dir:-~/daten/projects}

# The max depth to search for when listing projects. The actual depth is this value minus one, since it searches for ".git" folders at that depth.
projects_subfolder_level=4


# Lists all projects under $projects_dir or the current directory if that is a subfolder of $projects_dir and not a git repository.
# This is done by searching for corresponding ".git" folders and then listing their parent directories via "dirname"
listprojects() {
    if test "$1" = "--all"
    then find $projects_dir -mindepth 2 -maxdepth $projects_subfolder_level -type d -name ".git" | xargs dirname
    else
        if test "$(echo $PWD | grep $projects_dir/)" -a ! -d ".git" && ! git rev-parse --git-dir > /dev/null 2>&1
        then find $PWD -mindepth 2 -maxdepth $projects_subfolder_level -type d -name ".git" | xargs dirname
        else find $projects_dir -mindepth 2 -maxdepth $projects_subfolder_level -type d -not -path "*_*" -name ".git" | xargs dirname
        fi
    fi
}

# Underlines the project names
highlight() { echo "$1" }

# Lists all projects and evaluates the given command. 
alias p=projects
projects() {
    test "$1" = "--all" && all="$1" && shift
	case $1 in
	"build")
		# Builds all found gradle projects in parallel and then prints the results in batches - WARNING: This is likely to considerably slow down your computer!
		listprojects $all | while read d; do
			if test "$(find $d -maxdepth 1 -name "*gradle*")"; then
				cd $d
				buildlog="/tmp/build-$(basename $d)"
				(nohup gradle build --no-daemon --console=rich &>$buildlog; highlight $(basename $d | awk '{print toupper($0)}') && cat $buildlog) &
			fi
		done
		wait
		;;
	"diffs")
		# Puts the diffs of all projects into a single diffs.txt in the current directory
		listprojects $all | while read d; do
			echo $(basename $d)>>diffs.txt
			git -C $d diff -G.>>diffs.txt
			printf "\n">>diffs.txt
		done
		;;
	"status")
		# Sets the current branch upstream to a remote branch of the same name, updates it and shows "git status -s -b"
		listprojects $all | while read d; do
			cd $d
			highlight $(basename $d)
			git branch --set-upstream-to=origin/$(git curbranch)>/dev/null
			git pull --all | grep -v "Already up to date."
			git status -s -b
		done
		;;
	*)  
		# Just provide a one-line summary of the status of each project and execute the command entered on every project
		com="$@"
		listprojects $all | while read d; do
			cd $d
			if [[ $com != gradle* ]] || (( $(f1 -name "*gradle*" | wc -l) > 0 )); then
				local st=()
				local ahead=$(command git rev-list "${branch_name}"@{upstream}..HEAD 2>/dev/null | wc -l)
				test $ahead -gt 0 && st+=("ahead $ahead")
				local behind=$(command git rev-list HEAD.."${branch_name}"@{upstream} 2>/dev/null | wc -l)
				test $behind -gt 0 && st+=("behind $behind")
				local stashes=$(git stash list | wc -l)
				test $stashes -gt 0 && st+=("stashed $stashes")
				test "$st"  && name+=" [$(IFS=, eval 'JOINED="${st[*]}"' && echo $JOINED)]"
				highlight $(basename $d)
				eval "$com"
			fi
		done
	esac
	cd $projects_dir
}