From b63d4a0c622fa556695e7666b9b3bde920904920 Mon Sep 17 00:00:00 2001
From: Rebecca Turner <rbt@sent.as>
Date: Tue, 10 Sep 2024 13:13:19 -0700
Subject: Remove static initializers for `RegisterLegacyCommand`

This moves the "legacy"/"nix2" commands under a new `src/legacy/`
directory, instead of being scattered around in a bunch of different
directories.

A new `liblegacy` build target is defined, and the `nix` binary is
linked against it.

Then, `RegisterLegacyCommand` is replaced with `LegacyCommand::add`
calls in functions like `registerNixCollectGarbage()`. These
registration functions are called explicitly in `src/nix/main.cc`.

See: https://git.lix.systems/lix-project/lix/issues/359

Change-Id: Id450ffc3f793374907599cfcc121863b792aac1a
---
 src/nix/main.cc | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'src/nix/main.cc')

diff --git a/src/nix/main.cc b/src/nix/main.cc
index 4a3a7b4e7..fdd3ac2ae 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -15,6 +15,17 @@
 #include "markdown.hh"
 #include "experimental-features-json.hh"
 #include "deprecated-features-json.hh"
+#include "build-remote.hh"
+#include "daemon-command.hh"
+#include "hash-command.hh"
+#include "nix-build.hh"
+#include "nix-channel.hh"
+#include "nix-collect-garbage.hh"
+#include "nix-copy-closure.hh"
+#include "nix-env.hh"
+#include "nix-instantiate.hh"
+#include "nix-store.hh"
+#include "prefetch-command.hh"
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -30,6 +41,21 @@ void chrootHelper(int argc, char * * argv);
 
 namespace nix {
 
+void registerLegacyCommands()
+{
+    registerNixEnv();
+    registerNixBuildAndNixShell();
+    registerNixInstantiate();
+    registerNixCopyClosure();
+    registerNixCollectGarbage();
+    registerNixChannel();
+    registerNixStore();
+    registerBuildRemote();
+    registerNixDaemon();
+    registerNixPrefetchUrl();
+    registerNixHash();
+}
+
 static bool haveProxyEnvironmentVariables()
 {
     static const std::vector<std::string> proxyVariables = {
@@ -356,8 +382,10 @@ void mainWrapped(int argc, char * * argv)
     // Clean up the progress bar if shown using --log-format in a legacy command too.
     // Otherwise, this is a harmless no-op.
     Finally f([] { logger->pause(); });
+
     {
-        auto legacy = (*RegisterLegacyCommand::commands)[programName];
+        registerLegacyCommands();
+        auto legacy = (*LegacyCommands::commands)[programName];
         if (legacy) return legacy(argc, argv);
     }
 
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