fix(3p/nix): install nix_config.h and config.nix r/1054

This also installs the rest of corepkgs as a side-effect.

Change-Id: I67a42d45793d5e8fdad51c1f306eebf63e9c2868
Reviewed-on: https://cl.tvl.fyi/c/depot/+/548
Reviewed-by: tazjin <mail@tazj.in>

3 files changed, 21 insertions, 12 deletions

diff --git a/third_party/nix/CMakeLists.txt b/third_party/nix/CMakeLists.txt
index f325f5a5d9..54bf362332 100644
--- a/third_party/nix/CMakeLists.txt
+++ b/third_party/nix/CMakeLists.txt
@@ -40,5 +40,14 @@ add_subdirectory(glog)
 # generate a configuration file (autoheader-style) to configure
 # certain symbols that Nix depends on.
 configure_file(config.h.in nix_config.h @ONLY)
+INSTALL(FILES "${PROJECT_BINARY_DIR}/nix_config.h" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/nix")
+
+# install corepkgs
+configure_file(corepkgs/config.nix.in config.nix @ONLY)
+INSTALL(DIRECTORY corepkgs
+  DESTINATION ${CMAKE_INSTALL_DATADIR}/nix
+  FILES_MATCHING
+    PATTERN "*.nix")
+INSTALL(FILES "${PROJECT_BINARY_DIR}/config.nix" DESTINATION "${CMAKE_INSTALL_DATADIR}/nix/corepkgs")
 
 add_subdirectory(src)
diff --git a/third_party/nix/config.h.in b/third_party/nix/config.h.in
index 54855763d2..f0c3f06d0e 100644
--- a/third_party/nix/config.h.in
+++ b/third_party/nix/config.h.in
@@ -14,15 +14,15 @@
 #define SYSTEM "x86_64-linux"
 
  // TODO(tazjin): some of these values are nonsensical for Nix
-#define NIX_PREFIX "/usr/local"
+#define NIX_PREFIX "@CMAKE_INSTALL_PREFIX@"
 #define NIX_STORE_DIR "/nix/store"
-#define NIX_DATA_DIR "/usr/local/share"
+#define NIX_DATA_DIR "@CMAKE_INSTALL_FULL_DATADIR@"
 #define NIX_LOG_DIR "/nix/var/log/nix"
 #define NIX_STATE_DIR "/nix/var/nix"
-#define NIX_CONF_DIR "/usr/local/etc/nix"
-#define NIX_LIBEXEC_DIR "/usr/local/libexec"
-#define NIX_BIN_DIR "/usr/local/bin"
-#define NIX_MAN_DIR "/usr/local/share/man"
+#define NIX_CONF_DIR "/etc/nix"
+#define NIX_LIBEXEC_DIR "@CMAKE_INSTALL_FULL_LIBEXECDIR@"
+#define NIX_BIN_DIR "@CMAKE_INSTALL_FULL_BINDIR@"
+#define NIX_MAN_DIR "@CMAKE_INSTALL_FULL_MANDIR@"
 #define SANDBOX_SHELL "/nix/store/zq8biwi5mj2lrn68kx0lk0fkpbqypyxd-busybox-1.31.1-x86_64-unknown-linux-musl/bin/busybox"
 
 
diff --git a/third_party/nix/corepkgs/config.nix.in b/third_party/nix/corepkgs/config.nix.in
index 32ce6b399f..0e4a2f0c90 100644
--- a/third_party/nix/corepkgs/config.nix.in
+++ b/third_party/nix/corepkgs/config.nix.in
@@ -11,12 +11,12 @@ in rec {
   tar = "@tar@";
   tarFlags = "@tarFlags@";
   tr = "@tr@";
-  nixBinDir = fromEnv "NIX_BIN_DIR" "@bindir@";
-  nixPrefix = "@prefix@";
-  nixLibexecDir = fromEnv "NIX_LIBEXEC_DIR" "@libexecdir@";
-  nixLocalstateDir = "@localstatedir@";
-  nixSysconfDir = "@sysconfdir@";
-  nixStoreDir = fromEnv "NIX_STORE_DIR" "@storedir@";
+  nixBinDir = fromEnv "NIX_BIN_DIR" "@CMAKE_INSTALL_FULL_BINDIR@";
+  nixPrefix = "@CMAKE_INSTALL_PREFIX@";
+  nixLibexecDir = fromEnv "NIX_LIBEXEC_DIR" "@CMAKE_INSTALL_FULL_LIBEXECDIR@";
+  nixLocalstateDir = "/nix/var";
+  nixSysconfDir = "/etc";
+  nixStoreDir = fromEnv "NIX_STORE_DIR" "/nix/store";
 
   # If Nix is installed in the Nix store, then automatically add it as
   # a dependency to the core packages. This ensures that they work