From bc293726eef06b42c9efda0fd2330f836bbf3c65 Mon Sep 17 00:00:00 2001
From: Colin <colin@uninsane.org>
Date: Wed, 4 Jun 2025 18:57:47 +0000
Subject: [PATCH] mercurial: enable MQ extension

---
 hosts/common/programs/assorted.nix  |  3 ---
 hosts/common/programs/default.nix   |  1 +
 hosts/common/programs/mercurial.nix | 19 +++++++++++++++++++
 3 files changed, 20 insertions(+), 3 deletions(-)
 create mode 100644 hosts/common/programs/mercurial.nix

diff --git a/hosts/common/programs/assorted.nix b/hosts/common/programs/assorted.nix
index 913973a92..4979ccd26 100644
--- a/hosts/common/programs/assorted.nix
+++ b/hosts/common/programs/assorted.nix
@@ -849,9 +849,6 @@ in
 
     marksman.sandbox.whitelistPwd = true;
 
-    mercurial.sandbox.net = "clearnet";
-    mercurial.sandbox.whitelistPwd = true;
-
     mesa-demos.sandbox.whitelistDri = true;
     mesa-demos.sandbox.whitelistWayland = true;
     mesa-demos.sandbox.whitelistX = true;
diff --git a/hosts/common/programs/default.nix b/hosts/common/programs/default.nix
index e19af3ed1..4954bbbf5 100644
--- a/hosts/common/programs/default.nix
+++ b/hosts/common/programs/default.nix
@@ -123,6 +123,7 @@
     ./megapixels.nix
     ./megapixels-next.nix
     ./mepo.nix
+    ./mercurial.nix
     ./mimeo
     ./mimetype.nix
     ./mmcli.nix
diff --git a/hosts/common/programs/mercurial.nix b/hosts/common/programs/mercurial.nix
new file mode 100644
index 000000000..3d14e83da
--- /dev/null
+++ b/hosts/common/programs/mercurial.nix
@@ -0,0 +1,19 @@
+{ ... }:
+{
+  sane.programs.mercurial = {
+    sandbox.net = "clearnet";
+    sandbox.whitelistPwd = true;
+    sandbox.extraHomePaths = [
+      # even with `whitelistPwd`, hg has to crawl *up* the path -- which isn't necessarily in the sandbox -- to locate the repo root.
+      "dev"
+      "ref"
+    ];
+    fs.".config/hg/hgrc".symlink.text = ''
+      [extensions]
+      # Mercurial Queues (MQ) extension adds patch-stack support to mercurial.
+      # MQ is shipped in mercurial, but not enabled by default.
+      # it's a port of some git extension, idk which.
+      mq =
+    '';
+  };
+}