Merge completions into functions

Completions are nothing more than auto-loadable functions prefixed with
an underscore placed somewhere in $FPATH.

modules/git/functions/_git-hub

@@ -0,0 +1,44 @@
+#compdef git-hub
+#autoload
+
+#
+# Completes git-hub.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+local state remotes remote branches files ret=1
+
+_arguments -C -s -S \
+  '1::args:->remote' \
+  '2::args:->branch' \
+  '3::args:->file' && ret=0
+
+case "$state" in
+  (remote)
+    remotes=($(
+      git config -l \
+        | grep 'remote\.[^.]*\.url' \
+        | cut -d'.' -f2))
+    _describe -t branch 'remotes' remotes && ret=0
+  ;;
+  (branch)
+    remote="$words[(($CURRENT - 1))]"
+    branches=($(
+      git branch -r \
+        | grep "${remote}/" \
+        | sed \
+          -e "/${remote}\/HEAD -> ${remote}/d" \
+          -e "s/^[[:space:]]*${remote}\///g"
+    ))
+    _describe -t branch 'branches' branches && ret=0
+  ;;
+  (file)
+    files=(${(0)"$(_call_program files git ls-files -z --exclude-standard 2>/dev/null)"})
+    _wanted file expl 'file' _multi_parts - / files && ret=0
+  ;;
+esac
+
+return $ret
+

modules/git/functions/_git-hub-short-url

@@ -0,0 +1,12 @@
+#compdef git-hub-short-url
+#autoload
+
+#
+# Completes git-hub-short-url.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+_arguments '1:url:' && return 0
+

modules/git/functions/_git-info

@@ -0,0 +1,15 @@
+#compdef git-info
+#autoload
+
+#
+# Completes git-info.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+_arguments "1:toggle:((
+  on\:'enable in-prompt information for the current repository'
+  off\:'disable in-prompt information for the current repository'
+))" && return 0
+