Rewrite as remote plugin to avoid blocking

Author: thisisrandy

plugin/vim-outdated-plugins.vim

@@ -0,0 +1,78 @@
+from typing import Any, List
+import pynvim
+import subprocess
+import os
+from pynvim.api.nvim import Nvim
+
+
+def plug_can_proceed():
+    # plug.vim has these two guards in place. occassionally, if trigger mode is
+    # enabled, we can get in a situation where we're calling PlugUpdate when it
+    # will throw, causing a nasty error message. instead, we can just duplicate
+    # the guards here
+    if not os.getcwd():
+        return False
+
+    for evar in ["GIT_DIR", "GIT_WORK_TREE"]:
+        if os.environ.get(evar) != None:
+            return False
+
+    return True
+
+
+@pynvim.plugin
+class OutdatedPlugins:
+    def __init__(self, vim: Nvim) -> None:
+        self.vim = vim
+
+    @pynvim.function("CheckOutdatedPlugins")
+    def check_for_updates(self, args: List):
+        if not plug_can_proceed():
+            return
+
+        g_plugs = self.vim.eval("g:plugs")
+
+        update_commands = []
+        calculate_updates_commands = []
+
+        for plug in g_plugs.values():
+            update_commands.append("git -C %s remote update > /dev/null" % plug["dir"])
+            calculate_updates_commands.append(
+                "git -C %s rev-list HEAD..origin/%s --count"
+                % (plug["dir"], plug["branch"] if plug["branch"] else "master")
+            )
+
+        update_commands.append("wait")
+        update_command = " & ".join(update_commands)
+        calculate_updates_command = " && ".join(calculate_updates_commands)
+
+        subprocess.run(["bash", "-c", update_command])
+
+        out = subprocess.run(
+            ["bash", "-c", calculate_updates_command], stdout=subprocess.PIPE
+        )
+
+        plugs_to_update = sum(1 for i in out.stdout.decode().split() if int(i) > 0)
+        g_outdated_plugins_silent_mode = self.get_default(
+            "g:outdated_plugins_silent_mode", 0
+        )
+        g_outdated_plugins_trigger_mode = self.get_default(
+            "g:outdated_plugins_trigger_mode", 0
+        )
+
+        if plugs_to_update > 0:
+            self.vim.command(f"echo 'Plugins to update: {plugs_to_update}'")
+            if g_outdated_plugins_trigger_mode:
+                self.vim.command("PlugUpdate")
+        elif not g_outdated_plugins_silent_mode:
+            self.vim.command("echo 'All plugins up-to-date'")
+
+    def get_default(self, var: str, default: Any) -> Any:
+        """
+        Return the value of the vim variable `var` or `default` if it doesn't exist
+        """
+
+        try:
+            return self.vim.eval(var)
+        except:
+            return default