[libgpiod][PATCH 1/3] bindings: python: optionally include module in sdist

[Phil Howard <phil@gadgetoid.com>]

Build gpiod into Python module.

Optional environment var USE_SYSTEM_GPIO=1 to
generate a module that depends upon system gpiod.

Signed-off-by: Phil Howard <phil@gadgetoid.com>
---
 bindings/python/MANIFEST.in |  4 +++
 bindings/python/include     |  1 +
 bindings/python/lib         |  1 +
 bindings/python/setup.py    | 57 ++++++++++++++++++++++++++++---------
 4 files changed, 50 insertions(+), 13 deletions(-)
 create mode 120000 bindings/python/include
 create mode 120000 bindings/python/lib

diff --git a/bindings/python/MANIFEST.in b/bindings/python/MANIFEST.in
index c7124d4..eff8977 100644
--- a/bindings/python/MANIFEST.in
+++ b/bindings/python/MANIFEST.in
@@ -11,3 +11,7 @@ recursive-include gpiod/ext *.h
 
 recursive-include tests/gpiosim *.c
 recursive-include tests/procname *.c
+
+recursive-include lib *.c
+recursive-include lib *.h
+recursive-include include *.h
diff --git a/bindings/python/include b/bindings/python/include
new file mode 120000
index 0000000..fcffffb
--- /dev/null
+++ b/bindings/python/include
@@ -0,0 +1 @@
+../../include
\ No newline at end of file
diff --git a/bindings/python/lib b/bindings/python/lib
new file mode 120000
index 0000000..58677dd
--- /dev/null
+++ b/bindings/python/lib
@@ -0,0 +1 @@
+../../lib
\ No newline at end of file
diff --git a/bindings/python/setup.py b/bindings/python/setup.py
index 66b7908..2e25981 100644
--- a/bindings/python/setup.py
+++ b/bindings/python/setup.py
@@ -19,19 +19,53 @@ class build_ext(orig_build_ext):
         rmtree(path.join(self.build_lib, "tests"), ignore_errors=True)
 
 
+with open("gpiod/version.py", "r") as fd:
+    exec(fd.read())
+
+
+sources = [
+    # gpiod Python bindings
+    "gpiod/ext/chip.c",
+    "gpiod/ext/common.c",
+    "gpiod/ext/line-config.c",
+    "gpiod/ext/line-settings.c",
+    "gpiod/ext/module.c",
+    "gpiod/ext/request.c",
+]
+
+if "USE_SYSTEM_GPIOD" in environ and environ["USE_SYSTEM_GPIOD"] == "1":
+    libraries = ["gpiod"]
+    include_dirs = ["gpiod"]
+else:
+    sources += [
+        # gpiod library
+        "lib/chip.c",
+        "lib/chip-info.c",
+        "lib/edge-event.c",
+        "lib/info-event.c",
+        "lib/internal.c",
+        "lib/line-config.c",
+        "lib/line-info.c",
+        "lib/line-request.c",
+        "lib/line-settings.c",
+        "lib/misc.c",
+        "lib/request-config.c",
+    ]
+    libraries = []
+    include_dirs = ["include", "lib", "gpiod/ext"]
+
+
 gpiod_ext = Extension(
     "gpiod._ext",
-    sources=[
-        "gpiod/ext/chip.c",
-        "gpiod/ext/common.c",
-        "gpiod/ext/line-config.c",
-        "gpiod/ext/line-settings.c",
-        "gpiod/ext/module.c",
-        "gpiod/ext/request.c",
-    ],
+    libraries=libraries,
+    sources=sources,
     define_macros=[("_GNU_SOURCE", "1")],
-    libraries=["gpiod"],
-    extra_compile_args=["-Wall", "-Wextra"],
+    include_dirs=include_dirs,
+    extra_compile_args=[
+        "-Wall",
+        "-Wextra",
+        '-DGPIOD_VERSION_STR="{}"'.format(__version__),
+    ],
 )
 
 gpiosim_ext = Extension(
@@ -54,9 +88,6 @@ if "GPIOD_WITH_TESTS" in environ and environ["GPIOD_WITH_TESTS"] == "1":
     extensions.append(gpiosim_ext)
     extensions.append(procname_ext)
 
-with open("gpiod/version.py", "r") as fd:
-    exec(fd.read())
-
 setup(
     name="libgpiod",
     packages=find_packages(exclude=["tests", "tests.*"]),
-- 
2.34.1