Add the libsass version to --version

.gitignore

@@ -1,16 +1,17 @@
+*.egg
+*.egg-info
+*.pyc
+*.pyd
+*.so
+.*.swp
+.DS_Store
+._.DS_Store
+.coverage
+.tox
+/.libsass-upstream-version
 build/
 dist/
 docs/_build
 testpkg/build/
 testpkg/dist/
 testpkg/testpkg/static/css/*.scss.css
-._.DS_Store
-.coverage
-.DS_Store
-.tox
-.*.swp
-*.egg
-*.egg-info
-*.so
-*.pyc
-*.pyd

MANIFEST.in

@@ -3,5 +3,6 @@ recursive-include libsass *.cpp
 recursive-include libsass *.h
 recursive-include libsass *.hpp
 include libsass/Makefile
+include .libsass-upstream-version
 include test/*.scss
 include README.rst

Makefile

@@ -14,22 +14,29 @@ C_OBJECTS = $(patsubst libsass/src/%.c,build2/libsass/c/%.o,$(C_SOURCES))
 CPP_SOURCES := $(wildcard libsass/src/*.cpp)
 CPP_OBJECTS = $(patsubst libsass/src/%.cpp,build2/libsass/cpp/%.o,$(CPP_SOURCES))
 
+LIBSASS_VERSION = $(shell git -C libsass describe --abbrev=4 --dirty --always --tags)
+
+BASEFLAGS := -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -fPIC -I./libsass/include $(PY_HEADERS) -Wno-parentheses -Werror=switch -DLIBSASS_VERSION='"$(LIBSASS_VERSION)"'
+CFLAGS := $(BASEFLAGS) -Wstrict-prototypes
+CPPFLAGS := $(BASEFLAGS) -std=c++0x
+LFLAGS := -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -fPIC -lstdc++
+
 all: _sass.so
 
 build2/libsass/c/%.o: libsass/src/%.c
 	@mkdir -p build2/libsass/c/
-	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I./libsass/include $(PY_HEADERS) -c $^ -o $@ -c -O2 -fPIC -std=c++0x -Wall -Wno-parentheses -Werror=switch
+	gcc $(CFLAGS) -c $^ -o $@
 
 build2/libsass/cpp/%.o: libsass/src/%.cpp
 	@mkdir -p build2/libsass/cpp/
-	gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I./libsass/include $(PY_HEADERS) -c $^ -o $@ -c -O2 -fPIC -std=c++0x -Wall -Wno-parentheses -Werror=switch
+	gcc $(CPPFLAGS) -c $^ -o $@
 
 build2/pysass.o: pysass.cpp
 	@mkdir -p build2
-	gcc -pthread -fno-strict-aliasing -Wno-write-strings -DNDEBUG -g -fwrapv -O2 -Wall -fPIC -I./libsass/include $(PY_HEADERS) -c $^ -o $@ -c -O2 -fPIC -std=c++0x -Wall -Wno-parentheses -Werror=switch
+	gcc $(CPPFLAGS) -Wno-write-strings -c $^ -o $@
 
 _sass.so: $(C_OBJECTS) $(CPP_OBJECTS) build2/pysass.o
-	g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro $^ -L./libsass -o $@ -fPIC -lstdc++
+	g++ $(LFLAGS) $^ -o $@
 
 .PHONY: clean
 clean:

pysass.cpp

@@ -634,6 +634,7 @@ PyObject* PySass_make_enum_dict() {
 
 void PySass_init_module(PyObject *module) {
     PyModule_AddObject(module, "OUTPUT_STYLES", PySass_make_enum_dict());
+    PyModule_AddObject(module, "libsass_version", PyUnicode_FromString(libsass_version()));
 }
 
 #if PY_MAJOR_VERSION >= 3

sassc.py

@@ -74,13 +74,16 @@
 import sys
 import time
 
+import _sass
 from sass import __version__ as VERSION, OUTPUT_STYLES, CompileError, compile
 
 
 def main(argv=sys.argv, stdout=sys.stdout, stderr=sys.stderr):
     parser = optparse.OptionParser(
         usage='%prog [options] SCSS_FILE [OUT_CSS_FILE]',
-        version='%prog ' + VERSION
+        version='%prog {0} (sass/libsass {1})'.format(
+            VERSION, _sass.libsass_version,
+        ),
     )
     output_styles = list(OUTPUT_STYLES)
     output_styles = ', '.join(output_styles[:-1]) + ', or ' + output_styles[-1]

setup.py

@@ -5,26 +5,51 @@
 import distutils.cmd
 import distutils.log
 import distutils.sysconfig
-import os
 import os.path
 import platform
 import shutil
+import subprocess
 import sys
 import tempfile
 
 from setuptools import Extension, setup
 
 LIBSASS_SOURCE_DIR = os.path.join('libsass', 'src')
 
-if not os.path.isfile(os.path.join('libsass', 'Makefile')) and \
-   os.path.isdir('.git'):
+if (
+        not os.path.isfile(os.path.join('libsass', 'Makefile')) and
+        os.path.isdir('.git')
+):
     print(file=sys.stderr)
-    print('You seem to miss initializing submodules; '
-          'try the following command', file=sys.stderr)
+    print('Missing the libsass sumbodule.  Try:', file=sys.stderr)
     print('  git submodule update --init', file=sys.stderr)
     print(file=sys.stderr)
     exit(1)
 
+
+# Determine the libsass version from the git checkout
+if os.path.exists(os.path.join('libsass', '.git')):
+    proc = subprocess.Popen(
+        (
+            'git', '-C', 'libsass', 'describe',
+            '--abbrev=4', '--dirty', '--always', '--tags',
+        ),
+        stdout=subprocess.PIPE,
+    )
+    out, _ = proc.communicate()
+    assert not proc.returncode, proc.returncode
+    with open('.libsass-upstream-version', 'wb') as libsass_version_file:
+        libsass_version_file.write(out)
+
+# The version file should always exist at this point
+with open('.libsass-upstream-version', 'rb') as libsass_version_file:
+    libsass_version = libsass_version_file.read().decode('UTF-8').strip()
+    if sys.platform == 'win32':
+        # This looks wrong, but is required for some reason :(
+        version_define = r'/DLIBSASS_VERSION="\"{0}\""'.format(libsass_version)
+    else:
+        version_define = '-DLIBSASS_VERSION="{0}"'.format(libsass_version)
+
 sources = ['pysass.cpp']
 headers = []
 for directory in (
@@ -89,9 +114,7 @@ def customize_compiler(compiler):
             compiler.linker_so[0] = os.environ['CXX']
             return compiler
         distutils.sysconfig.customize_compiler = customize_compiler
-        flags.extend([
-            '-stdlib=libc++',
-        ])
+        flags.append('-stdlib=libc++')
         if platform.system() == 'Darwin':
             flags.append('-mmacosx-version-min=10.7',)
             if tuple(map(int, platform.mac_ver()[0].split('.'))) >= (10, 9):
@@ -134,10 +157,9 @@ def restore_cencode():
 sass_extension = Extension(
     '_sass',
     sources,
-    library_dirs=[os.path.join('.', 'libsass', 'src')],
     include_dirs=[os.path.join('.', 'libsass', 'include')],
     depends=headers,
-    extra_compile_args=flags,
+    extra_compile_args=flags + [version_define],
     extra_link_args=link_flags,
 )