feat(users/Profpatsch): init initial aerc config

aerc is a mail client. It needs some ini files to work.
This is an initial attempt at generating them.

Change-Id: I087955f19d2c4527275500a1e13eeb071c98a7b9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5526
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

users/Profpatsch/aerc.nix

@@ -0,0 +1,70 @@
+{ depot, pkgs, lib, ... }:
+
+let
+  aerc-patched = pkgs.aerc.overrideAttrs (old: {
+    patches = old.patches or [ ] ++ [
+      ./aerc-no-config-perms.patch
+    ];
+  });
+
+  bins = depot.nix.getBins aerc-patched [ "aerc" ];
+
+  config =
+    depot.users.Profpatsch.importDhall.importDhall
+      {
+        root = ./.;
+        files = [
+          "aerc.dhall"
+        ];
+        main = "aerc.dhall";
+        deps = [ ];
+      }
+      {
+        concatNewline = lib.concatStringsSep "\n";
+        aercFilter = name: "${aerc-patched}/share/aerc/filters/${name}";
+        toIni = getSections:
+          lib.generators.toINIWithGlobalSection { }
+            (getSections { } toIniDhall);
+      };
+
+  toIniDhall = {
+    newSection = { };
+    add = key: val: sect: sect // { ${key} = val; };
+    addAll = keyVals: sect: sect // builtins.listToAttrs keyVals;
+    newSectionList = { };
+    addSection = key: val: sect: sect // { ${key} = val; };
+  };
+
+
+  ini-file = name: ini: lib.pipe ini [
+    (lib.generators.toINI { })
+    (pkgs.writeText name)
+  ];
+
+  binds-file = name: binds: pkgs.writeText name binds;
+
+  aerc-config = pkgs.linkFarm "alacritty-config" [
+    {
+      name = "aerc/accounts.conf";
+      path = pkgs.writeText "accounts.conf" config.accounts;
+    }
+    {
+      name = "aerc/aerc.conf";
+      path = pkgs.writeText "aerc.conf" config.aerc;
+    }
+    {
+      name = "aerc/binds.conf";
+      path = binds-file "binds.conf" config.binds;
+    }
+  ];
+
+  aerc = depot.nix.writeExecline "aerc" { } [
+    "export"
+    "XDG_CONFIG_HOME"
+    aerc-config
+    bins.aerc
+    "$@"
+  ];
+
+in
+aerc