feat: bring back and adapt python bindings with rust core

* import python, try to adapt for rust * add missing wrapper functions * - try to write up how to build python bindings - strike some unused functions from deltachat.h * adjustments to make tox work * try to run circle-ci with python build * don't do docs * running cargo test as well * don't run cargo test anymore, that's done in other ci jobs * also build docs * don't run doxygen anymore * subst C with Rust * a try to get better wheels Closes #41
2026-04-17 21:46:35 +03:00 · 2019-05-30 23:17:38 +02:00
parent a2fc127923
commit 6ce8374513
53 changed files with 3996 additions and 8 deletions
--- a/python/src/deltachat/_build.py
+++ b/python/src/deltachat/_build.py
@@ -0,0 +1,73 @@
+import distutils.ccompiler
+import distutils.sysconfig
+import tempfile
+import os
+import cffi
+
+# XXX hack out the header and library dirs
+# relying on CFLAGS and LD_LIBRARY_PATH being set properly is not good
+# (but we also don't want to rely on global installs of headers and libs)
+HEADERDIR = os.environ["CFLAGS"].split("-I", 1)[1]
+LIBDIR = os.environ["LD_LIBRARY_PATH"]
+
+
+def ffibuilder():
+    builder = cffi.FFI()
+    builder.set_source(
+        'deltachat.capi',
+        """
+            #include <deltachat.h>
+            const char * dupstring_helper(const char* string)
+            {
+                return strdup(string);
+            }
+            int dc_get_event_signature_types(int e)
+            {
+                int result = 0;
+                if (DC_EVENT_DATA1_IS_STRING(e))
+                    result |= 1;
+                if (DC_EVENT_DATA2_IS_STRING(e))
+                    result |= 2;
+                if (DC_EVENT_RETURNS_STRING(e))
+                    result |= 4;
+                if (DC_EVENT_RETURNS_INT(e))
+                    result |= 8;
+                return result;
+            }
+        """,
+        libraries=['deltachat'],
+        include_dirs=[HEADERDIR],
+        library_dirs=[LIBDIR],
+    )
+    builder.cdef("""
+        typedef int... time_t;
+        void free(void *ptr);
+        extern const char * dupstring_helper(const char* string);
+        extern int dc_get_event_signature_types(int);
+    """)
+    cc = distutils.ccompiler.new_compiler(force=True)
+    distutils.sysconfig.customize_compiler(cc)
+    with tempfile.NamedTemporaryFile(mode='w', suffix='.h') as src_fp:
+        src_fp.write('#include <deltachat.h>')
+        src_fp.flush()
+        with tempfile.NamedTemporaryFile(mode='r') as dst_fp:
+            cc.preprocess(source=src_fp.name,
+                          output_file=dst_fp.name,
+                          include_dirs=[HEADERDIR],
+                          macros=[('PY_CFFI', '1')])
+            builder.cdef(dst_fp.read())
+    builder.cdef("""
+        extern "Python" uintptr_t py_dc_callback(
+            dc_context_t* context,
+            int event,
+            uintptr_t data1,
+            uintptr_t data2);
+    """)
+    return builder
+
+
+if __name__ == '__main__':
+    import os.path
+    pkgdir = os.path.join(os.path.dirname(__file__), '..')
+    builder = ffibuilder()
+    builder.compile(tmpdir=pkgdir, verbose=True)