Fix git prompt if hacking in .git directory

Author: Jonathan Dahan

changelog.md

@@ -3,6 +3,11 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## Unreleased
+
+### Fixed
+- geometry_git complaining when not in a work-tree
+
 ## 2.0.5 - 2019-10-14
 
 ### Fixed

functions/geometry_git.zsh

@@ -84,7 +84,8 @@ geometry_git_conflicts() {
 geometry_git() {
   (( $+commands[git] )) || return
 
-  command git rev-parse --git-dir > /dev/null 2>&1 || return
+  local git_dir; git_dir=$(git rev-parse --git-dir 2>&1) || return
+  pushd -q "${git_dir}/.."
 
   $(command git rev-parse --is-bare-repository 2>/dev/null) \
     && ansi ${GEOMETRY_GIT_COLOR_BARE:=blue} ${GEOMETRY_GIT_SYMBOL_BARE:="⬢"} \
@@ -97,6 +98,6 @@ geometry_git() {
     $(geometry_git_status)
   )
 
-  local separator=${GEOMETRY_GIT_SEPARATOR:-" :: "}
-  echo -n $(geometry_git_symbol) $(geometry_git_branch) ${(pj.$separator.)geometry_git_details}
+  echo -n $(geometry_git_symbol) $(geometry_git_branch) ${(ej.${GEOMETRY_GIT_SEPARATOR:-" :: "}.)geometry_git_details}
+  popd -q
 }