feat(corp/ops): bootstrap separate corp terraform config

Doesn't actually contain any configuration yet, just setting up TF
with the right providers and so on.

Change-Id: Ia7128dd977b4ff69eebaa36c6cad6ac104cafcdb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8492
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

corp/ops/.envrc

@@ -0,0 +1,4 @@
+out=$(nix-build ../.. -A corp.ops.deps --out-link ../../.gcroots/corp-deps)
+PATH_add "$out/bin"
+
+watch_file default.nix

corp/ops/.gitignore

@@ -0,0 +1,2 @@
+.terraform
+.terraform.lock.hcl

corp/ops/default.nix

@@ -0,0 +1,21 @@
+{ depot, lib, pkgs, ... }:
+
+depot.nix.readTree.drvTargets rec {
+  # Provide a Terraform wrapper with Yandex Cloud support.
+  terraform = pkgs.terraform.withPlugins (p: [
+    p.yandex
+  ]);
+
+  validate = depot.tools.checks.validateTerraform {
+    inherit terraform;
+    name = "corp";
+    src = lib.cleanSource ./.;
+  };
+
+  deps = depot.tools.depot-deps.overrideDeps {
+    tf-yandex = {
+      attr = "corp.ops.terraform";
+      cmd = "terraform";
+    };
+  };
+}

corp/ops/main.tf

@@ -0,0 +1,10 @@
+# Terraform configuration for TVL corp infrastructure (on Yandex
+# Cloud).
+
+terraform {
+  required_providers {
+    yandex = {
+      source = "yandex-cloud/yandex"
+    }
+  }
+}