How can I auto label nodes in a forest?

Question

I have tried searching for a solution everywhere however I either haven't been able to see it or it is not there.

I have a forest, I would like to add a label to each node such that 'Deadbeef' would be labelled 1, 'Something' would be labeled 1.1, 'else' 1.2 and then their children 1.1.1 etc.

I know I can do this with the \label command, however I am lazy and my tree grows so I don't want to keep numbering trivially.

\begin{forest}
for tree={
    grow'=0,
    align=center, 
    base=bottom
},
[Deadbeef
    [Something
        [Generic\\node]
        [Other\\ generic node]
        [That one\\there]        
    ]
    [Else
        [Client\\Side
            [Become\\data]
            [Bathe in\\data]
        ]
        [Server\\Side
            [One with\\data]
            [Meta\\data
                [Update\\main service]
                [Update\\database]
            ]
        ]
    ]
    [Kindof
        [You are\\very kind]
        [How much\\for the lot?]
        [Really not\\serious]
    ]
]
\end{forest}

My paintjob isn't great but I hope it portrays the idea I am trying to achieve. The ideal solution should take a tree of any size and label nodes accordingly incase I haven't made this clear.

---

Edit 1: The labels should go all the way to the nodes. I know about cfr's answer however the levels are specified manually. I don't know how many levels I will have for a tree so I would prefer for this to be done automatically.

Answer 1

Please always provide compilable code. It greatly reduces uncertainties, increases the prospect of questions being answered (a) at all and (b) in ways which actually help their askers, is much more efficient, more helpful to new users and generally makes life much easier.

Guessing how to complete your code, I'm also not clear if you really mean labels or if you want to change the nodes' content. I'm assuming the latter as labels make little sense here, as far as I can tell. That is, I take the target to be something like this:

If so:

\begin{forest}
  for tree={
    grow'=0,
    align=center, 
    base=bottom
  },
  before typesetting nodes={
    for tree breadth-first={
      if level=0{temptoksa=1}{
        temptoksa/.option=n,
        for nodewalk={
          while nodewalk valid={u}{u,+temptoksa=.,if level=0{+temptoksa=1}{+temptoksa/.option=n}}
        }{},
      },
      content/.process={ROw2{temptoksa}{content}{#1 #2}}
    }
  }
  [Deadbeef
    [Something
      [Generic\\node]
      [Other\\ generic node]
      [That one\\there]        
    ]
    [Else
      [Client\\Side
        [Become\\data]
        [Bathe in\\data]
      ]
      [Server\\Side
        [One with\\data]
        [Meta\\data
          [Update\\main service]
          [Update\\database]
        ]
      ]
    ]
    [Kindof
      [You are\\very kind]
      [How much\\for the lot?]
      [Really not\\serious]
    ]
  ]
\end{forest}

Incidentally, the tree does not look very clear to me, because the edges often end randomly in relation to their children. I would probably go for something more like this:

  for tree={
    grow'=0,
    align=center, 
    font=\sffamily,
  },
  forked edges,
  align middle children,

in the tree's preamble, where align middle children is from a custom library and defined as follows:

\forestset{
  align middle child/.style={
    before typesetting nodes={
      if={
        > Ow+P {n children}{isodd(##1)}
      }{
        calign child/.process={
          Ow+n {n children}{(##1+1)/2}
        },
        calign=child edge,
      }{},
    },
  },
  align middle children/.style={
    for tree={align middle child},
  },
}

But that's a matter of taste, of course.

Complete code:

\documentclass[border=10pt]{standalone}
\usepackage[edges]{forest}
\forestset{
  align middle child/.style={
    before typesetting nodes={
      if={
        > Ow+P {n children}{isodd(##1)}
      }{
        calign child/.process={
          Ow+n {n children}{(##1+1)/2}
        },
        calign=child edge,
      }{},
    },
  },
  align middle children/.style={
    for tree={align middle child},
  },
}
\begin{document}
\begin{forest}
  for tree={
    grow'=0,
    align=center, 
    base=bottom
  },
  before typesetting nodes={
    for tree breadth-first={
      if level=0{temptoksa=1}{
        temptoksa/.option=n,
        for nodewalk={
          while nodewalk valid={u}{u,+temptoksa=.,if level=0{+temptoksa=1}{+temptoksa/.option=n}}
        }{},
      },
      content/.process={ROw2{temptoksa}{content}{#1 #2}}
    }
  }
  [Deadbeef
    [Something
      [Generic\\node]
      [Other\\ generic node]
      [That one\\there]        
    ]
    [Else
      [Client\\Side
        [Become\\data]
        [Bathe in\\data]
      ]
      [Server\\Side
        [One with\\data]
        [Meta\\data
          [Update\\main service]
          [Update\\database]
        ]
      ]
    ]
    [Kindof
      [You are\\very kind]
      [How much\\for the lot?]
      [Really not\\serious]
    ]
  ]
\end{forest}
\begin{forest}
  for tree={
    grow'=0,
    align=center, 
    font=\sffamily,
  },
  forked edges,
  align middle children,
  before typesetting nodes={
    for tree breadth-first={
      if level=0{temptoksa=1}{
        temptoksa/.option=n,
        for nodewalk={
          while nodewalk valid={u}{u,+temptoksa=.,if level=0{+temptoksa=1}{+temptoksa/.option=n}}
        }{},
      },
      content/.process={ROw2{temptoksa}{content}{#1 #2}}
    }
  }
  [Deadbeef
    [Something
      [Generic\\node]
      [Other\\ generic node]
      [That one\\there]        
    ]
    [Else
      [Client\\Side
        [Become\\data]
        [Bathe in\\data]
      ]
      [Server\\Side
        [One with\\data]
        [Meta\\data
          [Update\\main service]
          [Update\\database]
        ]
      ]
    ]
    [Kindof
      [You are\\very kind]
      [How much\\for the lot?]
      [Really not\\serious]
    ]
  ]
\end{forest}
\end{document}

Answer 2

This is almost entirely stolen from @cfr's nice answer, and I will be happy to retract my post if @cfr posts an answer. I'm sure @cfr will also be able to avoid the ugly \addone. So this is just in case ....

\documentclass[border=3.14mm]{standalone}
\usepackage[edges]{forest}
\newcommand{\addone}[1]{\pgfmathtruncatemacro{\tmp}{#1+1}\tmp}
\begin{document}

\begin{forest}
set root label/.style={
    content/.wrap 2 pgfmath args={\addone{##1}. ##2}{n()}{content()},
  },
set node label/.style={
    content/.wrap 3 pgfmath args={\addone{##1}.##2 ##3}{n("!r")}{n()}{content()},
  },
set node super label/.style={
    content/.wrap 4 pgfmath args={\addone{##1}.##2.##3  ##4}{n("!rr")}{n("!u")}{n()}{content()},
  },
before typesetting nodes={
    for tree={
      if level=0{
        set root label,
      }{
        if level=1{
          set node label,
        }{
          if level=2{
            set node super label,
          }{
          },
        },
      },
    },
  },
for tree={
    grow'=0,
    align=center, 
    base=bottom
},
[Deadbeef
    [Something
        [Generic\\node]
        [Other\\ generic node]
        [That one\\there]        
    ]
    [Else
        [Client\\Side
            [Become\\data]
            [Bathe in\\data]
        ]
        [Server\\Side
            [One with\\data]
            [Meta\\data
                [Update\\main service]
                [Update\\database]
            ]
        ]
    ]
    [Kindof
        [You are\\very kind]
        [How much\\for the lot?]
        [Really not\\serious]
    ]
]
\end{forest}
\end{document}