From 9cbf541974bfe67a84f2450f97a8ccad52c6cd89 Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Tue, 31 Jul 2018 21:40:57 +0200
Subject: lib: add mount

---
 example/default.nix |  1 +
 lib/default.nix     | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/example/default.nix b/example/default.nix
index 4cd8ed6..0fa59c0 100644
--- a/example/default.nix
+++ b/example/default.nix
@@ -5,4 +5,5 @@ with import ../lib;
 {
   config = config "/dev/sda" (import ./config.nix);
   create = create "/dev/sda" (import ./config.nix);
+  mount = mount "/dev/sda" (import ./config.nix);
 }
diff --git a/lib/default.nix b/lib/default.nix
index d1f6acf..8b08d01 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -5,6 +5,7 @@ let {
 
   body.config = q: x: config.${x.type} q x;
   body.create = q: x: create.${x.type} q x;
+  body.mount = q: x: mount.${x.type} q x;
 
 
   config.filesystem = q: x: {
@@ -72,3 +73,46 @@ let {
     ${concatStrings (imap (index: body.create (q // { inherit index; })) x.partitions)}
   '';
 
+  mount.filesystem = q: x: {
+    fs.${x.mountpoint} = ''
+      mkdir -p ${x.mountpoint}
+      mount ${q.device} ${x.mountpoint}
+    '';
+  };
+
+  mount.devices = q: x: let
+    z = foldl' recursiveUpdate {} (mapAttrsToList (name: body.mount { device = "/dev/${name}"; }) x.content);
+    # attrValues returns values sorted by name.  This is important, because it
+    # ensures that "/" is processed before "/foo" etc.
+  in ''
+    ${concatStringsSep "\n" (attrValues z.luks)}
+    ${concatStringsSep "\n" (attrValues z.lvm)}
+    ${concatStringsSep "\n" (attrValues z.fs)}
+  '';
+
+  mount.luks = q: x: (
+    recursiveUpdate
+    (body.mount { device = "/dev/mapper/${x.name}"; } x.content)
+    {luks.${q.device} = ''
+      cryptsetup luksOpen ${q.device} ${x.name} --key-file ${x.keyfile}
+    '';}
+  );
+
+  mount.lv = q: x:
+    body.mount { device = "/dev/${q.vgname}/${q.name}"; } x.content;
+
+  mount.lvm = q: x: (
+    recursiveUpdate
+    (foldl' recursiveUpdate {} (mapAttrsToList (name: body.mount { inherit name; vgname = x.name; }) x.lvs))
+    {lvm.${q.device} = ''
+      vgchange -a y
+    '';}
+  );
+
+  mount.partition = q: x:
+    body.mount { device = q.device + toString q.index; } x.content;
+
+  mount.table = q: x:
+    foldl' recursiveUpdate {} (imap (index: body.mount (q // { inherit index; })) x.partitions);
+
+}
-- 
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