Merge pull request #15 from krisleech/krisleech_prompt

My personal theme, including cwd and git

themes/krisleech/fish_prompt.fish

+function _git_branch_name
+  echo (git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
+end
+
+function _is_git_dirty
+  echo (git status -s --ignore-submodules=dirty ^/dev/null)
+end
+
+function fish_prompt
+  set -l cyan (set_color -o cyan)
+  set -l yellow (set_color -o yellow)
+  set -l red (set_color -o red)
+  set -l blue (set_color -o blue)
+  set -l green (set_color -o green)
+  set -l normal (set_color normal)
+
+  set -l cwd $cyan(basename (prompt_pwd))
+
+  if [ (_git_branch_name) ]
+    set -l git_branch (_git_branch_name)
+    set git_info "$green$git_branch "
+
+    if [ (_is_git_dirty) ]
+      set -l dirty "$yellow✗"
+      set git_info "$git_info$dirty"
+    end
+  end
+
+  echo -n -s $cwd $red '|' $git_info $normal ⇒ ' ' $normal
+end