I still do stuff with Subversion so here's what I have to add a tiny amount of info to my Spaceship prompt

spaceship_prompt_svn.sh

# You can put this in your .zshrc
# Custom Spaceship section for SVN
SPACESHIP_SVN_SHOW="${SPACESHIP_SVN_SHOW=true}"
SPACESHIP_SVN_PREFIX="${SPACESHIP_SVN_PREFIX="$SPACESHIP_PROMPT_DEFAULT_PREFIX"}"
SPACESHIP_SVN_SUFFIX="${SPACESHIP_SVN_SUFFIX="$SPACESHIP_PROMPT_DEFAULT_SUFFIX"}"
SPACESHIP_SVN_SYMBOL="${SPACESHIP_SVN_SYMBOL="🐢 "}"
SPACESHIP_SVN_COLOR="${SPACESHIP_SVN_COLOR="yellow"}"

spaceship_svn() {
  [[ $SPACESHIP_SVN_SHOW == false ]] && return

  spaceship::exists svn || return

  local INFO=$(svn info 2>/dev/null)
	[ "$INFO" ] || return

  local 'svn_status'
  local 'DIRTY'

  REV=$(printf "%s\n" "$INFO" | grep 'Revision' 2>/dev/null | sed -e 's/Revision: //')
  [ "$(svn stat --ignore-externals | grep -v '[X?]' 2>/dev/null)" ] && DIRTY='*'


	svn_status="r${REV}${DIRTY}"

  # Exit section if variable is empty
  [[ -z $svn_status ]] && return

  # Display foobar section
  spaceship::section \
    "$SPACESHIP_SVN_COLOR" \
    "$SPACESHIP_SVN_PREFIX" \
    "$SPACESHIP_SVN_SYMBOL$svn_status" \
    "$SPACESHIP_SVN_SUFFIX"
}

# Is there a way to add a section without having to define this entire thing? I don't know.
SPACESHIP_PROMPT_ORDER=(
  time          # Time stamps section
  user          # Username section
  dir           # Current directory section
  host          # Hostname section
  svn
  git           # Git section (git_branch + git_status)
  node          # Node.js section
  exec_time     # Execution time
  line_sep      # Line break
  jobs          # Background jobs indicator
  exit_code     # Exit code section
  char          # Prompt character
)