add command line helper script

.gitignore

@@ -159,3 +159,5 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+.vscode/

Makefile

@@ -0,0 +1,12 @@
+.PHONY: clean
+clean:
+	rm -rf build/
+	rm -rf datasus.egg-info/
+	rm -rf dist
+
+.PHONY: build
+build:
+	python3 setup.py build
+
+install: build
+	python3 setup.py install

requirements.txt

@@ -0,0 +1 @@
+setuptools

scripts/dbc2dbf.py

@@ -0,0 +1,20 @@
+# datasus
+import sys
+
+from datasus import decompress
+
+def usage():
+    print("dbc2dbf.py: convert datasus *.dbc file to *.dbf")
+    print("usage:")
+    print("dbc2dbf.py file.dbc file.dbf")
+
+def main() -> int:
+    """decompress a *.dbc file into a *.dbf file"""
+    if len(sys.argv) < 3:
+        usage()
+        return -1
+
+    return decompress(sys.argv[1], sys.argv[2])
+
+if __name__ == '__main__':
+    sys.exit(main())

setup.py

@@ -4,8 +4,9 @@
     ext_modules=[
         Extension(
             name="datasus",
-            sources=["src/decompress.c", "src/blast.c"],
+            sources=["datasus/decompress.c", "datasus/blast.c"],
             language="c",
         ),
-    ]
+    ],
+    scripts=['scripts/dbc2dbf.py'],
 )