Change: upgrade Emscripten to 2.0.31 and enable LZMA by default (#9604)

.github/workflows/ci-build.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-20.04
     container:
       # If you change this version, change the number in the cache step too.
-      image: emscripten/emsdk:2.0.10
+      image: emscripten/emsdk:2.0.31
 
     steps:
     - name: Checkout
@@ -26,7 +26,12 @@ jobs:
       uses: actions/cache@v2
       with:
         path: /emsdk/upstream/emscripten/cache
-        key: 2.0.10-${{ runner.os }}
+        key: 2.0.31-${{ runner.os }}
+
+    - name: Patch Emscripten to support LZMA
+      run: |
+        cd /emsdk/upstream/emscripten
+        patch -p1 < ${GITHUB_WORKSPACE}/os/emscripten/emsdk-liblzma.patch
 
     - name: Build (host tools)
       run: |

.github/workflows/preview_build.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-20.04
     container:
       # If you change this version, change the number in the cache step too.
-      image: emscripten/emsdk:2.0.10
+      image: emscripten/emsdk:2.0.31
       # uid=1001(runner) gid=121(docker)
       options: -u 1001:121
 
@@ -46,7 +46,12 @@ jobs:
       uses: actions/cache@v2
       with:
         path: /emsdk/upstream/emscripten/cache
-        key: 2.0.10-${{ runner.os }}
+        key: 2.0.31-${{ runner.os }}
+
+    - name: Patch Emscripten to support LZMA
+      run: |
+        cd /emsdk/upstream/emscripten
+        patch -p1 < ${GITHUB_WORKSPACE}/os/emscripten/emsdk-liblzma.patch
 
     - name: Build (host tools)
       run: |

CMakeLists.txt

@@ -305,7 +305,7 @@ if(EMSCRIPTEN)
     add_definitions(-s DISABLE_EXCEPTION_CATCHING=0)
 
     # Export functions to Javascript.
-    target_link_libraries(WASM::WASM INTERFACE "-s EXPORTED_FUNCTIONS='[\"_main\", \"_em_openttd_add_server\"]' -s EXTRA_EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")
+    target_link_libraries(WASM::WASM INTERFACE "-s EXPORTED_FUNCTIONS='[\"_main\", \"_em_openttd_add_server\"]' -s EXPORTED_RUNTIME_METHODS='[\"cwrap\"]'")
 
     # Preload all the files we generate during build.
     # As we do not compile with FreeType / FontConfig, we also have no way to

os/emscripten/Dockerfile

@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:2.0.10
+FROM emscripten/emsdk:2.0.31
 
 COPY emsdk-liblzma.patch /
 RUN cd /emsdk/upstream/emscripten && patch -p1 < /emsdk-liblzma.patch

os/emscripten/README.md

@@ -1,6 +1,6 @@
 ## How to build with Emscripten
 
-Building with Emscripten works with emsdk 2.0.10 and above.
+Building with Emscripten works with emsdk 2.0.31 and above.
 
 Currently there is no LibLZMA support upstream; for this we suggest to apply
 the provided patch in this folder to your emsdk installation.

os/emscripten/emsdk-liblzma.patch

@@ -10,44 +10,35 @@ Modifed by OpenTTD to have the bare minimum needed to work. Otherwise there
 are constantly conflicts when trying to apply this patch to different versions
 of emsdk.
 
-diff --git a/embuilder.py b/embuilder.py
-index 818262190ed..ab7d5adb7b2 100755
---- a/embuilder.py
-+++ b/embuilder.py
-@@ -60,6 +60,7 @@
-     'harfbuzz',
-     'icu',
-     'libjpeg',
-+    'liblzma',
-     'libpng',
-     'ogg',
-     'regal',
-@@ -197,6 +198,8 @@ def main():
-       build_port('ogg', libname('libogg'))
-     elif what == 'libjpeg':
-       build_port('libjpeg', libname('libjpeg'))
-+    elif what == 'liblzma':
-+      build_port('liblzma', libname('liblzma'))
-     elif what == 'libpng':
-       build_port('libpng', libname('libpng'))
-     elif what == 'sdl2':
+diff --git a/tools/settings.py b/tools/settings.py
+--- a/tools/settings.py
++++ b/tools/settings.py
+@@ -38,6 +38,7 @@
+     'USE_SDL_NET',
+     'USE_SDL_GFX',
+     'USE_LIBJPEG',
++    'USE_LIBLZMA',
+     'USE_OGG',
+     'USE_REGAL',
+     'USE_BOOST_HEADERS',
 diff --git a/src/settings.js b/src/settings.js
-index 61cd98939ba..be6fcb678c6 100644
 --- a/src/settings.js
 +++ b/src/settings.js
-@@ -1197,6 +1197,9 @@ var USE_BZIP2 = 0;
+@@ -1382,8 +1382,12 @@ var USE_BZIP2 = 0;
  // 1 = use libjpeg from emscripten-ports
+ // [link]
  var USE_LIBJPEG = 0;
 
 +// 1 = use liblzma from emscripten-ports
++// [link]
 +var USE_LIBLZMA = 0;
 +
  // 1 = use libpng from emscripten-ports
+ // [link]
  var USE_LIBPNG = 0;
 
 diff --git a/tools/ports/liblzma.py b/tools/ports/liblzma.py
 new file mode 100644
-index 00000000000..e9567ef36ff
 --- /dev/null
 +++ b/tools/ports/liblzma.py
 @@ -0,0 +1,160 @@
@@ -58,6 +49,8 @@ index 00000000000..e9567ef36ff
 +
 +import os
 +import shutil
++import logging
++from pathlib import Path
 +
 +VERSION = '5.2.5'
 +HASH = '7443674247deda2935220fbc4dfc7665e5bb5a260be8ad858c8bd7d7b9f0f868f04ea45e62eb17c0a5e6a2de7c7500ad2d201e2d668c48ca29bd9eea5a73a3ce'
@@ -68,10 +61,11 @@ index 00000000000..e9567ef36ff
 +
 +
 +def get(ports, settings, shared):
-+  libname = ports.get_lib_name('liblzma')
 +  ports.fetch_project('liblzma', 'https://tukaani.org/xz/xz-' + VERSION + '.tar.gz', 'xz-' + VERSION, sha512hash=HASH)
 +
-+  def create():
++  def create(final):
++    logging.info('building port: liblzma')
++
 +    ports.clear_project_build('liblzma')
 +
 +    source_path = os.path.join(ports.get_dir(), 'liblzma', 'xz-' + VERSION)
@@ -88,22 +82,19 @@ index 00000000000..e9567ef36ff
 +                     'tuklib_exit.c', 'tuklib_mbstr_fw.c', 'tuklib_mbstr_width.c', 'tuklib_open_stdxxx.c', 'tuklib_progname.c']
 +    include_dirs_rel = ['../common', 'api', 'common', 'check', 'lz', 'rangecoder', 'lzma', 'delta', 'simple']
 +
-+    open(os.path.join(dest_path, 'src', 'config.h'), 'w').write(config_h)
++    Path(dest_path, os.path.join('src', 'config.h')).write_text(config_h)
 +
-+    final = os.path.join(dest_path, libname)
 +    include_dirs = [os.path.join(dest_path, 'src', 'liblzma', p) for p in include_dirs_rel]
 +    ports.build_port(os.path.join(dest_path, 'src'), final, flags=build_flags, exclude_dirs=exclude_dirs, exclude_files=exclude_files, includes=include_dirs)
 +
 +    ports.install_headers(os.path.join(dest_path, 'src', 'liblzma', 'api'), 'lzma.h')
 +    ports.install_headers(os.path.join(dest_path, 'src', 'liblzma', 'api', 'lzma'), '*.h', 'lzma')
 +
-+    return final
-+
-+  return [shared.Cache.get(libname, create, what='port')]
++  return [shared.Cache.get_lib('liblzma.a', create, what='port')]
 +
 +
 +def clear(ports, settings, shared):
-+  shared.Cache.erase_file(ports.get_lib_name('liblzma'))
++  shared.Cache.erase_lib('liblzma.a')
 +
 +
 +def process_args(ports):