allow install script to run in dry-run mode

3 files changed, 9 insertions, 3 deletions

diff --git a/mesonbuild/interpreter/mesonmain.py b/mesonbuild/interpreter/mesonmain.py
index c8c80b2..cd3d5ed 100644
--- a/mesonbuild/interpreter/mesonmain.py
+++ b/mesonbuild/interpreter/mesonmain.py
@@ -38,6 +38,7 @@ if T.TYPE_CHECKING:
 
         skip_if_destdir: bool
         install_tag: str
+        dry_run: bool
 
     class NativeKW(TypedDict):
 
@@ -152,6 +153,7 @@ class MesonMain(MesonInterpreterObject):
         'meson.add_install_script',
         KwargInfo('skip_if_destdir', bool, default=False, since='0.57.0'),
         KwargInfo('install_tag', (str, NoneType), since='0.60.0'),
+        KwargInfo('dry_run', bool, default=False, since='1.1.0'),
     )
     def add_install_script_method(
             self,
@@ -162,6 +164,7 @@ class MesonMain(MesonInterpreterObject):
         script = self._find_source_script('add_install_script', args[0], script_args)
         script.skip_if_destdir = kwargs['skip_if_destdir']
         script.tag = kwargs['install_tag']
+        script.dry_run = kwargs['dry_run']
         self.build.install_scripts.append(script)
 
     @typed_pos_args(
diff --git a/mesonbuild/minstall.py b/mesonbuild/minstall.py
index 8c74990..40c2d2d 100644
--- a/mesonbuild/minstall.py
+++ b/mesonbuild/minstall.py
@@ -361,9 +361,9 @@ class Installer:
             return p.returncode, o, e
         return 0, '', ''
 
-    def run_exe(self, *args: T.Any, **kwargs: T.Any) -> int:
-        if not self.dry_run:
-            return run_exe(*args, **kwargs)
+    def run_exe(self, exe: ExecutableSerialisation, extra_env: T.Optional[T.Dict[str, str]] = None) -> int:
+        if (not self.dry_run) or exe.dry_run:
+            return run_exe(exe, extra_env)
         return 0
 
     def should_install(self, d: T.Union[TargetInstallData, InstallEmptyDir,
@@ -655,6 +655,8 @@ class Installer:
                }
         if self.options.quiet:
             env['MESON_INSTALL_QUIET'] = '1'
+        if self.dry_run:
+            env['MESON_INSTALL_DRY_RUN'] = '1'
 
         for i in d.install_scripts:
             if not self.should_install(i):
diff --git a/mesonbuild/utils/core.py b/mesonbuild/utils/core.py
index 4398413..9b9afab 100644
--- a/mesonbuild/utils/core.py
+++ b/mesonbuild/utils/core.py
@@ -152,3 +152,4 @@ class ExecutableSerialisation:
         self.pickled = False
         self.skip_if_destdir = False
         self.subproject = ''
+        self.dry_run = False