Zen disk benchmark utility (#868)

This PR adds a `zen bench disk` subcommand to help with gathering user performance metrics

It also contains a fix for `xmake precommit`, the task now probes to find the most appropriate way to launch pre-commit

1 files changed, 26 insertions, 1 deletions

diff --git a/xmake.lua b/xmake.lua
index a84253082..5b4b3958c 100644
--- a/xmake.lua
+++ b/xmake.lua
@@ -571,7 +571,32 @@ task("precommit")
         description = "Run required pre-commit steps (clang-format, etc)",
     }
     on_run(function ()
-        print(os.exec("python -m pre_commit run --all-files"))
+        -- pre-commit can be installed as a standalone executable (e.g. via pipx,
+        -- Homebrew, or system packages) or as a Python module. We prefer the
+        -- standalone binary because it works regardless of which Python name the
+        -- system exposes. If it isn't in PATH we fall back to invoking it as a
+        -- module, trying "python" first since some systems only have that, and
+        -- "python3" otherwise.
+        local cmd
+        try {
+            function()
+                os.exec("pre-commit --version")
+                cmd = "pre-commit run --all-files"
+            end,
+            catch { function() end }
+        }
+        if not cmd then
+            local python = "python3"
+            try {
+                function()
+                    os.exec("python --version")
+                    python = "python"
+                end,
+                catch { function() end }
+            }
+            cmd = python .. " -m pre_commit run --all-files"
+        end
+        print(os.exec(cmd))
     end)
 
 task("sln")