Added import remapping support.

Author: miohtama

README.md

@@ -69,7 +69,21 @@ pip install py-solc
 ... "606060405260768060106000396000f3606060405260e060020a6000350463e7f09e058114601a575b005b60187f0c55699c00000000000000000000000000000000000000000000000000000000606090815273d3cda913deb6f67967b99d67acdfa1712c29360190630c55699c906064906000906004818660325a03f41560025750505056"
 ```
 
-
 ## Setting the path to the `solc` binary
 
 You can use the environment variable `SOLC_BINARY` to set the path to your solc binary.
+
+## Import path remappings
+
+`solc` provides path aliasing allow you to have more reusable project configurations.
+ 
+You can use this like:
+
+```
+from solc import compile_source, compile_files, link_code
+
+compile_files([source_file_path], remappings=["zeppeling=/my-zeppelin-checkout-folder"])
+```
+
+[More information about solc import aliasing](http://solidity.readthedocs.io/en/develop/layout-of-source-files.html#paths) 
+

solc/wrapper.py

@@ -29,6 +29,7 @@ def solc_wrapper(solc_binary=SOLC_BINARY,
                  gas=None,
                  assemble=None,
                  link=None,
+                 remappings=None,
                  source_files=None,
                  import_remappings=None,
                  ast=None,

tests/compilation/test_compiler_remappings.py

@@ -0,0 +1,27 @@
+import os
+
+from solc import (
+    get_solc_version,
+    compile_files,
+)
+
+
+def test_remappings(contracts_dir):
+    IMPORT_SOURCE = "contract Bar {}"
+    SOURCE = 'import "bar/moo.sol"; contract Foo is Bar { function Foo() {} function return13() returns (uint) { return 13; } }'
+
+    baz_path = os.path.abspath(os.path.join(contracts_dir, "baz"))
+    os.makedirs(baz_path)
+
+    source_file_path = os.path.join(baz_path, 'Moo.sol')
+    with open(source_file_path, 'w') as source_file:
+        source_file.write(IMPORT_SOURCE)
+
+    source_file_path = os.path.join(contracts_dir, 'Foo.sol')
+    with open(source_file_path, 'w') as source_file:
+        source_file.write(SOURCE)
+
+    output = compile_files([source_file_path], remappings=["bar={}".format(baz_path)])
+
+    assert output
+    assert 'Foo' in output