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* [RFC PATCH] python-cffi out-of-tree build
@ 2021-02-17 21:36 Tomi Ollila
  0 siblings, 0 replies; only message in thread
From: Tomi Ollila @ 2021-02-17 21:36 UTC (permalink / raw)
  To: notmuch; +Cc: tomi.ollila

setup.py and _build.py to refer some other files based on directory
where setup.py is located (os.path.dirname(sys.argv[0]).

Dropped bindings/python-cffi/version.txt and refer ../../version.txt
instead -- _build.py already refers ../../lib so why have version.txt
twice (with identical content).

Dropped copying of bindings/python-cffi source files to the build
directory bindings/python-cffi in configure.

---

an RFC alternative to id:20210215215410.28668-1-tomi.ollila@iki.fi

I really don't know how this should be done... do they even in e.g.
https://github.com/pypa/pip/issues/7555 ?

Tested to work in in-tree build, and out-of-tree builds referencing
.../notmuch/configure with absolute and relative paths, and all
3 builds worked.

When doing out-of-tree build, only _capi.abi3.so appeared in
bindings/python-cffi/build/stage/notmuch2/ -- in case of in-tree
build all the notmuch2/*.py source files also got copied there...

... I tried this changei in setup.py:
.  - packages=setuptools.find_packages(exclude=['tests'])
.  + packages=setuptools.find_packages(dn0, exclude=['tests'])
but then build broke.

 bindings/Makefile.local                 | 5 +++--
 bindings/python-cffi/notmuch2/_build.py | 6 +++++-
 bindings/python-cffi/setup.py           | 9 +++++++--
 bindings/python-cffi/version.txt        | 1 -
 configure                               | 4 ----
 5 files changed, 15 insertions(+), 10 deletions(-)
 delete mode 100644 bindings/python-cffi/version.txt

diff --git a/bindings/Makefile.local b/bindings/Makefile.local
index bc960bbc..d5c70bff 100644
--- a/bindings/Makefile.local
+++ b/bindings/Makefile.local
@@ -15,9 +15,10 @@ endif
 
 python-cffi-bindings: lib/$(LINKER_NAME)
 ifeq ($(HAVE_PYTHON3_CFFI),1)
+	test '$(srcdir)' = . && bdir=. || bdir='$(NOTMUCH_SRCDIR)/$(dir)/python-cffi'; \
 	cd $(dir)/python-cffi && \
-		${PYTHON} setup.py build --build-lib build/stage && \
-		mkdir -p build/stage/tests && cp tests/*.py build/stage/tests
+		${PYTHON} "$$bdir"/setup.py build --build-lib build/stage && \
+		mkdir -p build/stage/tests && cp "$$bdir"/tests/*.py build/stage/tests
 endif
 
 CLEAN += $(patsubst %,$(dir)/ruby/%, \
diff --git a/bindings/python-cffi/notmuch2/_build.py b/bindings/python-cffi/notmuch2/_build.py
index f67b4de6..ad585d21 100644
--- a/bindings/python-cffi/notmuch2/_build.py
+++ b/bindings/python-cffi/notmuch2/_build.py
@@ -1,5 +1,9 @@
 import cffi
 
+import os
+import sys
+
+dn0 = os.path.dirname(sys.argv[0])
 
 ffibuilder = cffi.FFI()
 ffibuilder.set_source(
@@ -16,7 +20,7 @@ ffibuilder.set_source(
         #ERROR libnotmuch  version < 5.1 not supported
     #endif
     """,
-    include_dirs=['../../lib'],
+    include_dirs=[dn0 + '/../../lib'],
     library_dirs=['../../lib'],
     libraries=['notmuch'],
 )
diff --git a/bindings/python-cffi/setup.py b/bindings/python-cffi/setup.py
index cda52338..5884944b 100644
--- a/bindings/python-cffi/setup.py
+++ b/bindings/python-cffi/setup.py
@@ -1,6 +1,11 @@
 import setuptools
 
-with open('version.txt') as fp:
+import os
+import sys
+
+dn0 = os.path.dirname(sys.argv[0])
+
+with open(dn0 + '/../../version.txt') as fp:
     VERSION = fp.read().strip()
 
 setuptools.setup(
@@ -12,7 +17,7 @@ setuptools.setup(
     setup_requires=['cffi>=1.0.0'],
     install_requires=['cffi>=1.0.0'],
     packages=setuptools.find_packages(exclude=['tests']),
-    cffi_modules=['notmuch2/_build.py:ffibuilder'],
+    cffi_modules=[dn0 + '/notmuch2/_build.py:ffibuilder'],
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Intended Audience :: Developers',
diff --git a/bindings/python-cffi/version.txt b/bindings/python-cffi/version.txt
deleted file mode 100644
index 8239f42d..00000000
--- a/bindings/python-cffi/version.txt
+++ /dev/null
@@ -1 +0,0 @@
-0.31.3
diff --git a/configure b/configure
index cfa9c09b..7bdd7a13 100755
--- a/configure
+++ b/configure
@@ -74,10 +74,6 @@ if [ "$srcdir" != "." ]; then
     # Use the same hack to replicate python-cffi source for
     # out-of-tree builds (again, not ideal).
     mkdir bindings/python-cffi
-    cp -a "$srcdir"/bindings/python-cffi/tests \
-       "$srcdir"/bindings/python-cffi/notmuch2 \
-       "$srcdir"/bindings/python-cffi/setup.py \
-       bindings/python-cffi/
 fi
 
 # Set several defaults (optionally specified by the user in
-- 
2.29.2

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