allow setting directory locations in a native file

This allows the person running configure (either a developer, user, or
distro maintainer) to keep a configuration of where various kinds of
files should end up.

5 files changed, 31 insertions, 20 deletions

diff --git a/mesonbuild/ast/introspection.py b/mesonbuild/ast/introspection.py
index 5d0ec5a..4a03e98 100644
--- a/mesonbuild/ast/introspection.py
+++ b/mesonbuild/ast/introspection.py
@@ -86,7 +86,7 @@ class IntrospectionInterpreter(AstInterpreter):
         self.project_default_options = mesonlib.stringlistify(def_opts)
         self.project_default_options = cdata.create_options_dict(self.project_default_options)
         self.default_options.update(self.project_default_options)
-        self.coredata.set_default_options(self.default_options, self.subproject, self.environment.cmd_line_options)
+        self.coredata.set_default_options(self.default_options, self.subproject, self.environment)
 
         if not self.is_subproject() and 'subproject_dir' in kwargs:
             spdirname = kwargs['subproject_dir']
diff --git a/mesonbuild/coredata.py b/mesonbuild/coredata.py
index 3ce272e..139dd6e 100644
--- a/mesonbuild/coredata.py
+++ b/mesonbuild/coredata.py
@@ -525,7 +525,13 @@ class CoreData:
             sub = 'In subproject {}: '.format(subproject) if subproject else ''
             mlog.warning('{}Unknown options: "{}"'.format(sub, unknown_options))
 
-    def set_default_options(self, default_options, subproject, cmd_line_options):
+    def set_default_options(self, default_options, subproject, env):
+        # Set defaults first from conf files (cross or native), then
+        # override them as nec as necessary.
+        for k, v in env.paths.host:
+            if v is not None:
+                env.cmd_line_options.setdefault(k, v)
+
         # Set default options as if they were passed to the command line.
         # Subprojects can only define default for user options.
         from . import optinterpreter
@@ -534,7 +540,7 @@ class CoreData:
                 if optinterpreter.is_invalid_name(k):
                     continue
                 k = subproject + ':' + k
-            cmd_line_options.setdefault(k, v)
+            env.cmd_line_options.setdefault(k, v)
 
         # Create a subset of cmd_line_options, keeping only options for this
         # subproject. Also take builtin options if it's the main project.
@@ -542,7 +548,7 @@ class CoreData:
         # languages and setting the backend (builtin options must be set first
         # to know which backend we'll use).
         options = {}
-        for k, v in cmd_line_options.items():
+        for k, v in env.cmd_line_options.items():
             if subproject:
                 if not k.startswith(subproject + ':'):
                     continue
diff --git a/mesonbuild/environment.py b/mesonbuild/environment.py
index 8ad65d7..afa6cd8 100644
--- a/mesonbuild/environment.py
+++ b/mesonbuild/environment.py
@@ -372,6 +372,7 @@ class Environment:
         # Similar to coredata.compilers and build.compilers, but lower level in
         # that there is no meta data, only names/paths.
         self.binaries = PerMachineDefaultable()
+
         # Just uses hard-coded defaults and environment variables. Might be
         # overwritten by a native file.
         self.binaries.build = BinaryTable({})
@@ -379,10 +380,16 @@ class Environment:
         # Misc other properties about each machine.
         self.properties = PerMachine(Properties(), Properties(), Properties())
 
+        # Store paths for native and cross build files. There is no target
+        # machine information here because nothing is installed for the target
+        # architecture, just the build and host architectures
+        self.paths = PerMachineDefaultable()
+
         if self.coredata.config_files is not None:
             config = MesonConfigFile.from_config_parser(
                 coredata.load_configs(self.coredata.config_files))
             self.binaries.build = BinaryTable(config.get('binaries', {}))
+            self.paths.build = Directories(**config.get('paths', {}))
 
         if self.coredata.cross_file is not None:
             config = MesonConfigFile.parse_datafile(self.coredata.cross_file)
@@ -395,6 +402,7 @@ class Environment:
 
         self.machines.default_missing()
         self.binaries.default_missing()
+        self.paths.default_missing()
 
         exe_wrapper = self.binaries.host.lookup_entry('exe_wrapper')
         if exe_wrapper is not None:
@@ -1173,46 +1181,46 @@ class Environment:
     def get_exe_suffix(self):
         return self.exe_suffix
 
-    def get_import_lib_dir(self):
+    def get_import_lib_dir(self) -> str:
         "Install dir for the import library (library used for linking)"
         return self.get_libdir()
 
-    def get_shared_module_dir(self):
+    def get_shared_module_dir(self) -> str:
         "Install dir for shared modules that are loaded at runtime"
         return self.get_libdir()
 
-    def get_shared_lib_dir(self):
+    def get_shared_lib_dir(self) -> str:
         "Install dir for the shared library"
         if self.win_libdir_layout:
             return self.get_bindir()
         return self.get_libdir()
 
-    def get_static_lib_dir(self):
+    def get_static_lib_dir(self) -> str:
         "Install dir for the static library"
         return self.get_libdir()
 
     def get_object_suffix(self):
         return self.object_suffix
 
-    def get_prefix(self):
+    def get_prefix(self) -> str:
         return self.coredata.get_builtin_option('prefix')
 
-    def get_libdir(self):
+    def get_libdir(self) -> str:
         return self.coredata.get_builtin_option('libdir')
 
-    def get_libexecdir(self):
+    def get_libexecdir(self) -> str:
         return self.coredata.get_builtin_option('libexecdir')
 
-    def get_bindir(self):
+    def get_bindir(self) -> str:
         return self.coredata.get_builtin_option('bindir')
 
-    def get_includedir(self):
+    def get_includedir(self) -> str:
         return self.coredata.get_builtin_option('includedir')
 
-    def get_mandir(self):
+    def get_mandir(self) -> str:
         return self.coredata.get_builtin_option('mandir')
 
-    def get_datadir(self):
+    def get_datadir(self) -> str:
         return self.coredata.get_builtin_option('datadir')
 
     def get_compiler_system_dirs(self):
diff --git a/mesonbuild/interpreter.py b/mesonbuild/interpreter.py
index 2eb0720..c03bae1 100644
--- a/mesonbuild/interpreter.py
+++ b/mesonbuild/interpreter.py
@@ -2458,8 +2458,6 @@ external dependencies (including libraries) must go to "dependencies".''')
         return self.subprojects[dirname]
 
     def get_option_internal(self, optname):
-        # Some base options are not defined in some environments, return the
-        # default value from compilers.base_options in that case.
         for d in chain(
                 [self.coredata.base_options, compilers.base_options, self.coredata.builtins],
                 self.coredata.get_all_compiler_options()):
@@ -2576,7 +2574,7 @@ external dependencies (including libraries) must go to "dependencies".''')
             default_options.update(self.default_project_options)
         else:
             default_options = {}
-        self.coredata.set_default_options(default_options, self.subproject, self.environment.cmd_line_options)
+        self.coredata.set_default_options(default_options, self.subproject, self.environment)
         self.set_backend()
 
         if not self.is_subproject():
diff --git a/mesonbuild/mconf.py b/mesonbuild/mconf.py
index 48f88e8..a3feebe 100644
--- a/mesonbuild/mconf.py
+++ b/mesonbuild/mconf.py
@@ -102,8 +102,7 @@ class Conf:
         if not options:
             print('  No {}\n'.format(title.lower()))
         arr = []
-        for k in sorted(options):
-            o = options[k]
+        for k, o in sorted(options.items()):
             d = o.description
             v = o.printable_value()
             c = o.choices