Meson misc things

Meson-ify a few things, scripts, completions, etc. Should make our Meson
build complete except for docs.

Co-Authored-By: Qyriad <qyriad@qyriad.me>
Co-Authored-By: eldritch horrors <pennae@lix.systems>

build-utils-meson/export/meson.build

@@ -10,6 +10,7 @@ foreach dep : deps_public_subproject
 endforeach
 requires_public += deps_public
 
+extra_pkg_config_variables = get_variable('extra_pkg_config_variables', {})
 import('pkgconfig').generate(
   this_library,
   filebase : meson.project_name(),
@@ -20,6 +21,7 @@ import('pkgconfig').generate(
   requires : requires_public,
   requires_private : requires_private,
   libraries_private : libraries_private,
+  variables : extra_pkg_config_variables,
 )
 
 meson.override_dependency(meson.project_name(), declare_dependency(
@@ -27,4 +29,5 @@ meson.override_dependency(meson.project_name(), declare_dependency(
   link_with : this_library,
   compile_args : ['-std=c++2a'],
   dependencies : deps_public_subproject + deps_public,
+  variables : extra_pkg_config_variables,
 ))

flake.nix

@@ -295,6 +295,7 @@
       devShells = let
         makeShell = pkgs: stdenv: (pkgs.nix.override { inherit stdenv; forDevShell = true; }).overrideAttrs (attrs:
         let
+          buildCanExecuteHost = stdenv.buildPlatform.canExecute stdenv.hostPlatform;
           modular = devFlake.getSystem stdenv.buildPlatform.system;
           transformFlag = prefix: flag:
             assert builtins.isString flag;
@@ -352,7 +353,7 @@
             ++ pkgs.nixComponents.nix-external-api-docs.nativeBuildInputs
             ++ pkgs.nixComponents.nix-functional-tests.baseNativeBuildInputs
             ++ lib.optional
-              (!stdenv.buildPlatform.canExecute stdenv.hostPlatform
+              (!buildCanExecuteHost
                  # Hack around https://github.com/nixos/nixpkgs/commit/bf7ad8cfbfa102a90463433e2c5027573b462479
                  && !(stdenv.hostPlatform.isWindows && stdenv.buildPlatform.isDarwin)
                  && stdenv.hostPlatform.emulatorAvailable pkgs.buildPackages

meson.build

@@ -3,7 +3,9 @@
 
 project('nix-dev-shell', 'cpp',
   version : files('.version'),
-  subproject_dir : 'src',
+  default_options : [
+    'localstatedir=/nix/var',
+  ]
 )
 
 # Internal Libraries

misc/bash/meson.build

@@ -0,0 +1,8 @@
+configure_file(
+  input : 'completion.sh',
+  output : 'nix',
+  install : true,
+  install_dir : get_option('datadir') / 'bash-completion' / 'completions',
+  install_mode : 'rw-r--r--',
+  copy : true,
+)

misc/fish/meson.build

@@ -0,0 +1,8 @@
+configure_file(
+  input : 'completion.fish',
+  output : 'nix.fish',
+  install : true,
+  install_dir : get_option('datadir') / 'fish' / 'vendor_completions.d',
+  install_mode : 'rw-r--r--',
+  copy : true,
+)

misc/meson.build

@@ -0,0 +1,5 @@
+subdir('bash')
+subdir('fish')
+subdir('zsh')
+
+subdir('systemd')

misc/systemd/meson.build

@@ -0,0 +1,25 @@
+foreach config : [ 'nix-daemon.socket', 'nix-daemon.service' ]
+  configure_file(
+    input : config + '.in',
+    output : config,
+    install : true,
+    install_dir : get_option('prefix') / 'lib/systemd/system',
+    install_mode : 'rw-r--r--',
+    configuration : {
+      'storedir' : store_dir,
+      'localstatedir' : localstatedir,
+      'bindir' : get_option('datadir'),
+    },
+  )
+endforeach
+
+configure_file(
+  input : 'nix-daemon.conf.in',
+  output : 'nix-daemon.conf',
+  install : true,
+  install_dir : get_option('prefix') / 'lib/tmpfiles.d',
+  install_mode : 'rw-r--r--',
+  configuration : {
+    'localstatedir' : localstatedir,
+  },
+)

misc/zsh/meson.build

@@ -0,0 +1,10 @@
+foreach script : [ [ 'completion.zsh', '_nix' ], [ 'run-help-nix' ] ]
+  configure_file(
+    input : script[0],
+    output : script.get(1, script[0]),
+    install : true,
+    install_dir : get_option('datadir') / 'zsh/site-functions',
+    install_mode : 'rw-r--r--',
+    copy : true,
+  )
+endforeach

scripts/meson.build

@@ -0,0 +1,29 @@
+# configures `scripts/nix-profile.sh.in` (and copies the original to the build directory).
+# this is only needed for tests, but running it unconditionally does not hurt enough to care.
+configure_file(
+  input : 'nix-profile.sh.in',
+  output : 'nix-profile.sh',
+  configuration : {
+    'localstatedir': localstatedir,
+  }
+)
+
+# https://github.com/mesonbuild/meson/issues/860
+configure_file(
+  input : 'nix-profile.sh.in',
+  output : 'nix-profile.sh.in',
+  copy : true,
+)
+
+foreach rc : [ '.sh', '.fish', '-daemon.sh', '-daemon.fish' ]
+  configure_file(
+    input : 'nix-profile' + rc  + '.in',
+    output : 'nix' + rc,
+    install : true,
+    install_dir : get_option('profile-dir'),
+    install_mode : 'rw-r--r--',
+    configuration : {
+      'localstatedir': localstatedir,
+    },
+  )
+endforeach

src/libstore/meson.build

@@ -7,6 +7,7 @@ project('nix-store', 'cpp',
     'debug=true',
     'optimization=2',
     'errorlogs=true', # Please print logs for tests that fail
+    'localstatedir=/nix/var',
   ],
   meson_version : '>= 1.1',
   license : 'LGPL-2.1-or-later',
@@ -324,7 +325,7 @@ fs = import('fs')
 
 prefix = get_option('prefix')
 # For each of these paths, assume that it is relative to the prefix unless
-# it is already an absolute path (which is the default for store-dir, state-dir, and log-dir).
+# it is already an absolute path (which is the default for store-dir, localstatedir, and log-dir).
 path_opts = [
   # Meson built-ins.
   'datadir',
@@ -334,13 +335,13 @@ path_opts = [
   'libexecdir',
   # Homecooked Nix directories.
   'store-dir',
-  'state-dir',
+  'localstatedir',
   'log-dir',
 ]
 # For your grepping pleasure, this loop sets the following variables that aren't mentioned
 # literally above:
 # store_dir
-# state_dir
+# localstatedir
 # log_dir
 # profile_dir
 foreach optname : path_opts
@@ -364,12 +365,12 @@ lsof = find_program('lsof', required : false)
 
 # Aside from prefix itself, each of these was made into an absolute path
 # by joining it with prefix, unless it was already an absolute path
-# (which is the default for store-dir, state-dir, and log-dir).
+# (which is the default for store-dir, localstatedir, and log-dir).
 cpp_str_defines = {
   'NIX_PREFIX':    prefix,
   'NIX_STORE_DIR': store_dir,
   'NIX_DATA_DIR':  datadir,
-  'NIX_STATE_DIR': state_dir / 'nix',
+  'NIX_STATE_DIR': localstatedir / 'nix',
   'NIX_LOG_DIR':   log_dir,
   'NIX_CONF_DIR':  sysconfdir / 'nix',
   'NIX_MAN_DIR':   mandir,
@@ -421,4 +422,15 @@ install_headers(headers, subdir : 'nix', preserve_path : true)
 
 libraries_private = []
 
+extra_pkg_config_variables = {
+  'storedir' : get_option('store-dir'),
+}
+
+# Working around https://github.com/mesonbuild/meson/issues/13584
+if host_machine.system() != 'macos'
+  extra_pkg_config_variables += {
+    'localstatedir' : get_option('localstatedir'),
+  }
+endif
+
 subdir('build-utils-meson/export')

src/libstore/meson.options

@@ -16,10 +16,6 @@ option('store-dir', type : 'string', value : '/nix/store',
   description : 'path of the Nix store',
 )
 
-option('state-dir', type : 'string', value : '/nix/var',
-  description : 'path to store state in for Nix',
-)
-
 option('log-dir', type : 'string', value : '/nix/var/log/nix',
   description : 'path to store logs in for Nix',
 )

src/libutil/meson.build

@@ -129,7 +129,6 @@ sources = files(
   'english.cc',
   'environment-variables.cc',
   'error.cc',
-  'exec.hh',
   'executable-path.cc',
   'exit.cc',
   'experimental-features.cc',
@@ -186,6 +185,7 @@ headers = [config_h] + files(
   'english.hh',
   'environment-variables.hh',
   'error.hh',
+  'exec.hh',
   'executable-path.hh',
   'exit.hh',
   'experimental-features.hh',

src/nix/meson.build

@@ -7,6 +7,7 @@ project('nix', 'cpp',
     'debug=true',
     'optimization=2',
     'errorlogs=true', # Please print logs for tests that fail
+    'localstatedir=/nix/var',
   ],
   meson_version : '>= 1.1',
   license : 'LGPL-2.1-or-later',
@@ -16,9 +17,11 @@ cxx = meson.get_compiler('cpp')
 
 subdir('build-utils-meson/deps-lists')
 
+nix_store = dependency('nix-store')
+
 deps_private_maybe_subproject = [
   dependency('nix-util'),
-  dependency('nix-store'),
+  nix_store,
   dependency('nix-expr'),
   dependency('nix-flake'),
   dependency('nix-fetchers'),
@@ -244,3 +247,12 @@ custom_target(
 )
 # TODO(Ericson3214): Dosen't yet work
 #meson.override_find_program(linkname, t)
+
+localstatedir = nix_store.get_variable(
+  'localstatedir',
+  default_value : get_option('localstatedir'),
+)
+assert(localstatedir == get_option('localstatedir'))
+store_dir = nix_store.get_variable('storedir')
+subdir('scripts')
+subdir('misc')

src/nix/meson.options

@@ -0,0 +1,6 @@
+# vim: filetype=meson
+
+# A relative path means it gets appended to prefix.
+option('profile-dir', type : 'string', value : 'etc/profile.d',
+  description : 'the path to install shell profile files',
+)

src/nix/misc

@@ -0,0 +1 @@
+../../misc

src/nix/package.nix

@@ -36,9 +36,10 @@ mkMesonDerivation (finalAttrs: {
     ../../.version
     ./.version
     ./meson.build
-    # ./meson.options
+    ./meson.options
 
     # Symbolic links to other dirs
+    ## exes
     ./build-remote
     ./doc
     ./nix-build
@@ -48,6 +49,11 @@ mkMesonDerivation (finalAttrs: {
     ./nix-env
     ./nix-instantiate
     ./nix-store
+    ## dirs
+    ./scripts
+    ../../scripts
+    ./misc
+    ../../misc
 
     # Doc nix files for --help
     ../../doc/manual/generate-manpage.nix

src/nix/scripts

@@ -0,0 +1 @@
+../../scripts

subprojects

@@ -0,0 +1 @@
+src

tests/unit/libutil-support/meson.build

@@ -46,6 +46,7 @@ include_dirs = [include_directories('.')]
 
 headers = files(
   'tests/characterization.hh',
+  'tests/gtest-with-params.hh',
   'tests/hash.hh',
   'tests/nix_api_util.hh',
   'tests/string_callback.hh',