install: Add --strip option

docs/markdown/snippets/strip.md

@@ -0,0 +1,5 @@
+## `meson install --strip`
+
+It is now possible to strip targets using `meson install --strip` even if
+`-Dstrip=true` option was not set during configuration. This allows doing
+stripped and not stripped installations without reconfiguring the build.

mesonbuild/backend/backends.py

@@ -144,6 +144,7 @@ class TargetInstallData:
     subproject: str
     optional: bool = False
     tag: T.Optional[str] = None
+    can_strip: bool = False
 
     def __post_init__(self, outdir_name: str) -> None:
         self.out_name = os.path.join(outdir_name, os.path.basename(self.fname))
@@ -1573,7 +1574,8 @@ class Backend:
                 #
                 # TODO: Create GNUStrip/AppleStrip/etc. hierarchy for more
                 #       fine-grained stripping of static archives.
-                should_strip = not isinstance(t, build.StaticLibrary) and self.get_option_for_target(OptionKey('strip'), t)
+                can_strip = not isinstance(t, build.StaticLibrary)
+                should_strip = can_strip and self.get_option_for_target(OptionKey('strip'), t)
                 assert isinstance(should_strip, bool), 'for mypy'
                 # Install primary build output (library/executable/jar, etc)
                 # Done separately because of strip/aliases/rpath
@@ -1584,7 +1586,7 @@ class Backend:
                                           install_dir_name,
                                           should_strip, mappings, t.rpath_dirs_to_remove,
                                           t.install_rpath, install_mode, t.subproject,
-                                          tag=tag)
+                                          tag=tag, can_strip=can_strip)
                     d.targets.append(i)
 
                     for alias, to, tag in t.get_aliases():

mesonbuild/minstall.py

@@ -61,6 +61,7 @@ if T.TYPE_CHECKING:
         dry_run: bool
         skip_subprojects: str
         tags: str
+        strip: bool
 
 
 symlink_warning = '''Warning: trying to copy a symlink that points to a file. This will copy the file,
@@ -88,6 +89,8 @@ def add_arguments(parser: argparse.ArgumentParser) -> None:
                         help='Do not install files from given subprojects. (Since 0.58.0)')
     parser.add_argument('--tags', default=None,
                         help='Install only targets having one of the given tags. (Since 0.60.0)')
+    parser.add_argument('--strip', action='store_true',
+                        help='Strip targets even if strip option was not set during configure. (Since 0.62.0)')
 
 class DirMaker:
     def __init__(self, lf: T.TextIO, makedirs: T.Callable[..., None]):
@@ -564,6 +567,15 @@ class Installer:
             else:
                 raise
 
+    def do_strip(self, strip_bin: T.List[str], fname: str, outname: str) -> None:
+        self.log(f'Stripping target {fname!r}.')
+        returncode, stdo, stde = self.Popen_safe(strip_bin + [outname])
+        if returncode != 0:
+            print('Could not strip file.\n')
+            print(f'Stdout:\n{stdo}\n')
+            print(f'Stderr:\n{stde}\n')
+            sys.exit(1)
+
     def install_subdirs(self, d: InstallData, dm: DirMaker, destdir: str, fullprefix: str) -> None:
         for i in d.install_subdirs:
             if not self.should_install(i):
@@ -676,7 +688,7 @@ class Installer:
             outdir = get_destdir_path(destdir, fullprefix, t.outdir)
             outname = os.path.join(outdir, os.path.basename(fname))
             final_path = os.path.join(d.prefix, t.outdir, os.path.basename(fname))
-            should_strip = t.strip
+            should_strip = t.strip or (t.can_strip and self.options.strip)
             install_rpath = t.install_rpath
             install_name_mappings = t.install_name_mappings
             install_mode = t.install_mode
@@ -689,13 +701,7 @@ class Installer:
                     if fname.endswith('.jar'):
                         self.log('Not stripping jar target: {}'.format(os.path.basename(fname)))
                         continue
-                    self.log('Stripping target {!r} using {}.'.format(fname, d.strip_bin[0]))
-                    returncode, stdo, stde = self.Popen_safe(d.strip_bin + [outname])
-                    if returncode != 0:
-                        print('Could not strip file.\n')
-                        print(f'Stdout:\n{stdo}\n')
-                        print(f'Stderr:\n{stde}\n')
-                        sys.exit(1)
+                    self.do_strip(d.strip_bin, fname, outname)
                 if fname.endswith('.js'):
                     # Emscripten outputs js files and optionally a wasm file.
                     # If one was generated, install it as well.
@@ -721,7 +727,6 @@ class Installer:
                     else:
                         raise
 
-
 def rebuild_all(wd: str) -> bool:
     if not (Path(wd) / 'build.ninja').is_file():
         print('Only ninja backend is supported to rebuild the project before installation.')

test cases/unit/104 strip/lib.c

@@ -0,0 +1 @@
+void func(void){}

test cases/unit/104 strip/meson.build

@@ -0,0 +1,3 @@
+project('strip', 'c')
+
+shared_library('a', 'lib.c', install: true)

unittests/linuxliketests.py

@@ -1760,3 +1760,23 @@ class LinuxlikeTests(BasePlatformTests):
 
         # If so, we can test that cmake works with "gcc -m32"
         self.do_one_test_with_nativefile('../cmake/1 basic', "['gcc', '-m32']")
+
+    @skipUnless(is_linux(), 'Test only applicable to Linux')
+    def test_install_strip(self):
+        testdir = os.path.join(self.unit_test_dir, '104 strip')
+        self.init(testdir)
+        self.build()
+
+        destdir = self.installdir + self.prefix
+        lib = os.path.join(destdir, self.libdir, 'liba.so')
+        install_cmd = self.meson_command + ['install', '--destdir', self.installdir]
+
+        # Check we have debug symbols by default
+        self._run(install_cmd, workdir=self.builddir)
+        stdout = self._run(['file', '-b', lib])
+        self.assertIn('not stripped', stdout)
+
+        # Check debug symbols got removed with --strip
+        self._run(install_cmd + ['--strip'], workdir=self.builddir)
+        stdout = self._run(['file', '-b', lib])
+        self.assertNotIn('not stripped', stdout)