diff --git a/lib/hg.zsh b/lib/hg.zsh
new file mode 100644
index 000000000..eeae808a1
--- /dev/null
+++ b/lib/hg.zsh
@@ -0,0 +1,32 @@
+# get the name of the branch we are on
+function hg_prompt_info() {
+  ref=$(hg branch 2> /dev/null) || return
+  echo "$ZSH_THEME_HG_PROMPT_PREFIX${ref}$(hg_prompt_status)$(parse_hg_dirty)$ZSH_THEME_HG_PROMPT_SUFFIX"
+}
+
+parse_hg_dirty () {
+  if [[ -n $(hg status 2> /dev/null) ]]; then
+    echo "$ZSH_THEME_HG_PROMPT_DIRTY"
+  else
+    echo "$ZSH_THEME_HG_PROMPT_CLEAN"
+  fi
+}
+
+# get the status of the working tree
+hg_prompt_status() {
+  INDEX=$(hg status 2> /dev/null)
+  STATUS=""
+  if $(echo "$INDEX" | grep '^? ' &> /dev/null); then
+    STATUS="$ZSH_THEME_HG_PROMPT_UNTRACKED$STATUS"
+  fi
+  if $(echo "$INDEX" | grep '^A ' &> /dev/null); then
+    STATUS="$ZSH_THEME_HG_PROMPT_ADDED$STATUS"
+  fi
+  if $(echo "$INDEX" | grep '^M ' &> /dev/null); then
+    STATUS="$ZSH_THEME_HG_PROMPT_MODIFIED$STATUS"
+  fi
+  if $(echo "$INDEX" | grep '^R ' &> /dev/null); then
+    STATUS="$ZSH_THEME_HG_PROMPT_DELETED$STATUS"
+  fi
+  echo $STATUS
+}