build/emscripten: work around mesonbuild/meson#12638

scripts/meson.build

@@ -140,3 +140,6 @@ res_index_install_command = [res_index_install_script, common_taiseilib_args]
 macos_install_dylibs_script = find_program(files('macos-install-dylibs.py'))
 # NOTE/FIXME: script doesn't use taiseilib
 macos_install_dylibs_command = [macos_install_dylibs_script]
+
+post_install_remove_script = find_program(files('post-install-remove.py'))
+post_install_remove_command = [post_install_remove_script, common_taiseilib_args]

scripts/post-install-remove.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import shutil
+
+from pathlib import Path
+
+from taiseilib.common import (
+    add_common_args,
+    run_main,
+)
+
+def main(args):
+    import argparse
+    parser = argparse.ArgumentParser(description='Install resources from res-index', prog=args[0])
+
+    parser.add_argument('remove_items',
+        type=Path,
+        help='the files and/or directories to remove (relative to install destdir + prefix)',
+        nargs='*',
+    )
+
+    add_common_args(parser)
+
+    args = parser.parse_args(args[1:])
+
+    install_root = Path(os.environ['MESON_INSTALL_DESTDIR_PREFIX'])
+    quiet = bool(os.environ.get('MESON_INSTALL_QUIET', False))
+    dryrun = bool(os.environ.get('MESON_INSTALL_DRY_RUN', False))
+
+    def log(*s):
+        if not quiet:
+            print(*s)
+
+    for item in args.remove_items:
+        itempath = (install_root / item)
+
+        if dryrun:
+            log(f'Would remove {itempath}')
+        elif itempath.exists():
+            if itempath.is_dir():
+                log(f'Removing directory {itempath}')
+                itempath.rmdir()
+            else:
+                log(f'Removing file {itempath}')
+                itempath.unlink()
+        else:
+            log(f'Skipping non-existent file {itempath}')
+
+
+if __name__ == '__main__':
+    run_main(main)

src/meson.build

@@ -354,13 +354,31 @@ if host_machine.system() == 'emscripten'
         em_link_outputs += ['@0@.@1@'.format(taisei_basename, suffix)]
     endforeach
 
+    meson_link_whole_is_broken = meson.version().version_compare('>1.1.0')
+
+    if meson_link_whole_is_broken
+        warning('Installing private static library to work around a Meson bug: https://github.com/mesonbuild/meson/issues/12638')
+    endif
+
     libtaisei = static_library(taisei_basename, taisei_src, version_deps,
         dependencies : taisei_deps,
         c_pch : 'pch/taisei_pch.h',
         c_args : [em_common_args, taisei_c_args],
-        install : false,
+        install : meson_link_whole_is_broken,
+        install_dir : '.',
+        install_tag : 'trash',
+        # Explicitly give it a predictable name, in case we have to remove it via install script
+        name_prefix : 'lib',
+        name_suffix : 'a',
     )
 
+    if meson_link_whole_is_broken
+        meson.add_install_script(
+            post_install_remove_command, 'lib' + libtaisei.name() + '.a',
+            install_tag : 'trash',
+        )
+    endif
+
     taisei = static_library(taisei_basename + '-full',
         link_whole : libtaisei,
     )