Merge librebound and rebound into a single multi-output recipe

- Combine librebound/ and rebound/ into rebound/ with two outputs,
  following the matplotlib pattern
- Add patch to remove emscripten_sleep calls that require ASYNCIFY;
  the integration loop yield and pause poll are no-ops without a
  display server and break browser-main execution otherwise

Author: MMesch

recipes/recipes_emscripten/librebound/recipe.yaml

@@ -0,0 +1,31 @@
+Remove emscripten_sleep calls that require ASYNCIFY.
+
+Upstream uses emscripten_sleep(0) in the integration loop to yield to the
+browser for drawing, and emscripten_sleep(100) in the pause loop to poll.
+Both require -sASYNCIFY which we do not compile with (no display server).
+Without ASYNCIFY these calls abort at runtime with "Please compile your
+program with async support".
+
+For the integration loop: simply drop the yield — without a display server
+there is nothing to draw and synchronous WASM cannot yield anyway.
+For the pause loop: break immediately rather than spinning; the simulation
+resumes as if it was never paused (pause is not meaningful without ASYNCIFY).
+--- a/src/simulation.c
++++ b/src/simulation.c
+@@ -300,7 +300,8 @@ static int reb_check_exit(struct reb_simulation* const r, const double tmax, do
+     while(r->status == REB_STATUS_PAUSED || r->status == REB_STATUS_SCREENSHOT){
+         // Wait for user to disable paused simulation
+ #ifdef __EMSCRIPTEN__
+-        emscripten_sleep(100);
++        r->status = REB_STATUS_RUNNING; // ASYNCIFY not available; resume immediately
++        break;
+ #else
+         usleep(1000);
+ #endif
+@@ -399,7 +399,6 @@ static void* reb_simulation_integrate_raw(void* args){
+         if (t1-t0>1000./120.){ // max framerate 120Hz
+             t0 = t1;
+-            emscripten_sleep(0); // allow drawing and event handling
+         }
+
+ #endif

…s/recipes_emscripten/librebound/build.sh …s_emscripten/rebound/build_librebound.shrecipes/recipes_emscripten/librebound/build.sh renamed to recipes/recipes_emscripten/rebound/build_librebound.sh recipes/recipes_emscripten/librebound/build.sh renamed to recipes/recipes_emscripten/rebound/build_librebound.sh

@@ -2,55 +2,110 @@ context:
   name: rebound
   version: 5.0.0
 
-package:
-  name: ${{ name }}
-  version: ${{ version }}
-
 source:
-- url: https://pypi.io/packages/source/${{ name[0] }}/${{ name }}/${{ name }}-${{ version }}.tar.gz
+- url: https://pypi.io/packages/source/r/rebound/rebound-${{ version }}.tar.gz
   sha256: 9012bc4ceac42da8c1344f54e72b64da4720149875dc069d8e0dd1be0285dc04
   patches:
   - patches/0001-skip-c-extension-on-emscripten.patch
   - patches/0002-load-librebound-from-prefix.patch
   - patches/0003-fix-pyodide-import.patch
+  - patches/0004-remove-emscripten-sleep.patch
 
 build:
   number: 0
-  script: ${PYTHON} -m pip install . ${PIP_ARGS} --no-deps --no-build-isolation
-
-  files:
-    exclude:
-    - '**/__pycache__/**'
-    - '**/*.pyc'
-    - '**/*.so'
-  python:
-    skip_pyc_compilation:
-    - '**/*.py'
 
-requirements:
+outputs:
+- package:
+    name: librebound
+    version: ${{ version }}
   build:
-  - cross-python_${{ target_platform }}
-  - python
-  - setuptools
-  - wheel
-  - pip
-  host:
-  - python
-  run:
-  - python
-  - librebound
+    script: build_librebound.sh
+  requirements:
+    build:
+    - ${{ compiler('c') }}
+  tests:
+  - package_contents:
+      lib:
+      - librebound.so
+      include:
+      - rebound.h
+      - rebound_internal.h
+      - boundary.h
+      - collision.h
+      - derivatives.h
+      - display.h
+      - fmemopen.h
+      - frequency_analysis.h
+      - gravity.h
+      - integrator_bs.h
+      - integrator_eos.h
+      - integrator_ias15.h
+      - integrator_janus.h
+      - integrator_leapfrog.h
+      - integrator_mercurius.h
+      - integrator_saba.h
+      - integrator_sei.h
+      - integrator_trace.h
+      - integrator_whfast.h
+      - integrator_whfast512.h
+      - output.h
+      - particle.h
+      - rebound.h
+      - rotations.h
+      - server.h
+      - simulation.h
+      - simulationarchive.h
+      - tools.h
+      - transformations.h
+      - tree.h
+      - binarydata.h
+  - script: build_tests.sh
+    requirements:
+      build:
+      - ${{ compiler('c') }}
+    files:
+      source:
+      - src/
+      recipe:
+      - build_tests.sh
+      - tests/
 
-tests:
-- script: pytester
-  files:
-    recipe:
-    - test_import_rebound.py
+- package:
+    name: rebound
+    version: ${{ version }}
+  build:
+    script: ${PYTHON} -m pip install . ${PIP_ARGS} --no-deps --no-build-isolation
+    files:
+      exclude:
+      - '**/__pycache__/**'
+      - '**/*.pyc'
+      - '**/*.so'
+    python:
+      skip_pyc_compilation:
+      - '**/*.py'
   requirements:
     build:
-    - pytester
+    - cross-python_${{ target_platform }}
+    - python
+    - setuptools
+    - wheel
+    - pip
+    host:
+    - python
     run:
-    - pytester-run
+    - python
     - librebound
+  tests:
+  - script: pytester
+    files:
+      recipe:
+      - test_import_rebound.py
+    requirements:
+      build:
+      - pytester
+      run:
+      - pytester-run
+      - librebound
 
 about:
   homepage: https://github.com/hannorein/rebound