Make the Solidity repository standalone.

This commit is the culmination of several months of work to decouple Solidity from the webthree-umbrella so that it can be developed in parallel with cpp-ethereum (the Ethereum C++ runtime) and so that even for the Solidity unit-tests there is no hard-dependency onto the C++ runtime.

The Tests-over-IPC refactoring was a major step in the same process which was already committed.

This commit contains the following changes:

- A subset of the CMake functionality in webthree-helpers was extracted and tailored for Solidity into ./cmake.   Further cleanup is certainly possible.
- A subset of the libdevcore functionality in libweb3core was extracted and tailored for Solidity into ./libdevcore.   Further cleanup is certainly possible
- The gas price constants in EVMSchedule were orphaned into libevmasm.
- Some other refactorings and cleanups were made to sever unnecessary EVM dependencies in the Solidity unit-tests.
- TravisCI and Appveyor support was added, covering builds and running of the unit-tests (Linux and macOS only for now)
- A bug-fix was made to get the Tests-over-IPC running on macOS.
- There are still reliability issues in the unit-tests, which need immediate attention.    The Travis build has been flipped to run the unit-tests 5 times, to try to flush these out.
- The Emscripten automation which was previously in webthree-umbrella was merged into the TravisCI automation here.
- The development ZIP deployment step has been commented out, but we will want to read that ONLY for release branch.

Further iteration on these changes will definitely be needed, but I feel these have got to sufficient maturity than holding them back further isn't winning us anything.    It is go time :-)

1 files changed, 65 insertions, 0 deletions

diff --git a/scripts/fix_homebrew_paths_in_standalone_zip.py b/scripts/fix_homebrew_paths_in_standalone_zip.py
new file mode 100755
index 00000000..38aa9685
--- /dev/null
+++ b/scripts/fix_homebrew_paths_in_standalone_zip.py
@@ -0,0 +1,65 @@
+# ------------------------------------------------------------------------------
+# This Python script is used within the OS X release process, to ensure
+# that the standalone OS X ZIP files which we make are actually
+# standalone, and not implicitly dependent on Homebrew installs for
+# external libraries which we use.
+#
+# This implicit dependencies seem to show up only where we have
+# external dependencies which are dependent on each other, and the
+# path from one to another is an absolute path to "/usr/local/opt",
+# the Homebrew install location.   External dependencies which only
+# depend on system libraries are fine.   Our main applications seem
+# to be fine.
+#
+# An example of a dependency which requires this fix-up at the time
+# of writing is the following dependency edge:
+#
+# libjsonrpccpp-client.0.dylib
+#     -> /usr/local/opt/jsoncpp/lib/libjsoncpp.0.dylib
+#
+# See https://blogs.oracle.com/dipol/entry/dynamic_libraries_rpath_and_mac
+# for a little overview of "install_name_tool" and "otool".
+#
+# ------------------------------------------------------------------------------
+# This file is part of solidity.
+#
+# solidity is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# solidity is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with solidity.  If not, see <http://www.gnu.org/licenses/>
+#
+# (c) 2016 solidity contributors.
+# -----------------------------------------------------------------------------
+
+import os
+import subprocess
+import sys
+
+
+def readDependencies(fname):
+    with open(fname) as f:
+        o = subprocess.Popen(['otool', '-L', fname], stdout=subprocess.PIPE)
+        for line in o.stdout:
+            if line[0] == '\t':
+                library = line.split(' ', 1)[0][1:]
+                if library.startswith("/usr/local/lib") or library.startswith("/usr/local/opt") or library.startswith("/Users/"):
+                    if (os.path.basename(library) != os.path.basename(fname)):
+                        command = "install_name_tool -change " + \
+                            library + " @executable_path/./" + \
+                            os.path.basename(library) + " " + fname
+                        print command
+                        os.system("chmod +w " + fname)
+                        os.system(command)
+
+root = sys.argv[1]
+for (dirpath, dirnames, filenames) in os.walk(root):
+    for filename in filenames:
+        readDependencies(os.path.join(root, filename))