From f1fd277f1e5df976a23f4ad7091536e96851865f Mon Sep 17 00:00:00 2001
From: Brian McKenna <brian@brianmckenna.org>
Date: Wed, 6 Nov 2024 00:04:41 +1100
Subject: [PATCH] msys2: make symbolic linking work in Meson

---
 src/libstore/meson.build | 2 ++
 src/nix/meson.build      | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/src/libstore/meson.build b/src/libstore/meson.build
index c2aa5bff3..b10f3753c 100644
--- a/src/libstore/meson.build
+++ b/src/libstore/meson.build
@@ -34,6 +34,8 @@ subdir('build-utils-meson/subprojects')
 run_command('ln', '-s',
   meson.project_build_root() / '__nothing_link_target',
   meson.project_build_root() / '__nothing_symlink',
+  # native doesn't allow dangling symlinks, which the tests require
+  env : { 'MSYS' : 'winsymlinks:lnk' },
   check : true,
 )
 can_link_symlink = run_command('ln',
diff --git a/src/nix/meson.build b/src/nix/meson.build
index 55089d821..cc18aebbf 100644
--- a/src/nix/meson.build
+++ b/src/nix/meson.build
@@ -229,6 +229,8 @@ foreach linkname : nix_symlinks
   t = custom_target(
     command: ['ln', '-sf', fs.name(this_exe), '@OUTPUT@'],
     output: linkname + executable_suffix,
+    # native doesn't allow dangling symlinks, but the target executable often doesn't exist at this time
+    env : { 'MSYS' : 'winsymlinks:lnk' },
     # TODO(Ericson2314): Don't do this once we have the `meson.override_find_program` working)
     build_by_default: true
   )
@@ -247,6 +249,8 @@ install_symlink(
 custom_target(
   command: ['ln', '-sf', fs.name(this_exe), '@OUTPUT@'],
   output: 'build-remote' + executable_suffix,
+  # native doesn't allow dangling symlinks, but the target executable often doesn't exist at this time
+  env : { 'MSYS' : 'winsymlinks:lnk' },
   # TODO(Ericson2314): Don't do this once we have the `meson.override_find_program` working)
   build_by_default: true
 )