make the plugin actually work!

1. added branch checking
2. made updating work correctly

eatit.lua

@@ -114,6 +114,17 @@ local function startinstall()
       plugins[i]['dir'] = '~~/'
     end
 
+    -- get the plugins tmp download dir
+    local plugdir = opts.dl.dir .. '/' ..
+      string.match(plugins[i][1], '/([^/]+)$'):gsub('.git', '')
+
+    -- if no specified branch we use the default
+    if not plugins[i]['branch'] then
+      plugins[i]['branch'] = testforslash(
+        run('git -C ' .. plugdir .. ' symbolic-ref refs/remotes/origin/HEAD')
+      )
+    end
+
     -- get the file's dir
     local pluginfile = opts.dl.dir .. '/' ..
       string.match(plugins[i][1], '/([^/]+)$'):gsub('.git', '') ..
@@ -122,18 +133,20 @@ local function startinstall()
     -- get the dest dir
     local destfile = mp.command_native({'expand-path', '~~/'}) ..
       '/' .. plugins[i]['dir'] ..
-      '/' .. plugins[i]['file']
+      '/' .. testforslash(plugins[i]['file'])
 
-    if fileexists(pluginfile) then
+    if fileexists(plugdir .. '/') then
       -- if we need to update, update
-      if checkupdates(i) then
+      if checkupdates(plugdir) then
         logwrite(plugins[i]['file'] .. ' is updating.')
-        clonegit(i)
+        -- make sure we are on the main branch
+        run('git -C ' .. plugdir .. ' checkout -q ' .. plugins[i]['branch'])
+        run('git -C ' .. plugdir .. ' pull') -- get the latest commits
       else
         logwrite(plugins[i]['file'] .. ' is up to date!')
       end
     else
-      clonegit(i)
+      clonegit(plugdir, i)
     end
 
     -- copy the file contents over to the desired location