Create the Goanna Runtime Environment

1 files changed, 150 insertions, 0 deletions

diff --git a/mach b/mach
new file mode 100755
index 000000000..1759179a3
--- /dev/null
+++ b/mach
@@ -0,0 +1,150 @@
+#!/bin/sh
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# The beginning of this script is both valid shell and valid python,
+# such that the script starts with the shell and is reexecuted with
+# the right python.
+'''which' python2.7 > /dev/null && exec python2.7 "$0" "$@" || exec python "$0" "$@"
+'''
+
+from __future__ import print_function, unicode_literals
+
+import os
+import sys
+
+def ancestors(path):
+    while path:
+        yield path
+        (path, child) = os.path.split(path)
+        if child == "":
+            break
+
+def load_mach(dir_path, mach_path):
+    import imp
+    with open(mach_path, 'r') as fh:
+        imp.load_module('mach_bootstrap', fh, mach_path,
+                        ('.py', 'r', imp.PY_SOURCE))
+    import mach_bootstrap
+    return mach_bootstrap.bootstrap(dir_path)
+
+
+def check_and_get_mach(dir_path):
+    bootstrap_paths = (
+        'build/mach_bootstrap.py',
+        # test package bootstrap
+        'tools/mach_bootstrap.py',
+    )
+    for bootstrap_path in bootstrap_paths:
+        mach_path = os.path.join(dir_path, bootstrap_path)
+        if os.path.isfile(mach_path):
+            return load_mach(dir_path, mach_path)
+    return None
+
+
+def get_mach():
+    # Check whether the current directory is within a mach src or obj dir.
+    for dir_path in ancestors(os.getcwd()):
+        # If we find a "config.status" and "mozinfo.json" file, we are in the objdir.
+        config_status_path = os.path.join(dir_path, 'config.status')
+        mozinfo_path = os.path.join(dir_path, 'mozinfo.json')
+        if os.path.isfile(config_status_path) and os.path.isfile(mozinfo_path):
+            import json
+            info = json.load(open(mozinfo_path))
+            if 'mozconfig' in info and 'MOZCONFIG' not in os.environ:
+                # If the MOZCONFIG environment variable is not already set, set it
+                # to the value from mozinfo.json.  This will tell the build system
+                # to look for a config file at the path in $MOZCONFIG rather than
+                # its default locations.
+                #
+                # Note: subprocess requires native strings in os.environ on Windows
+                os.environ[b'MOZCONFIG'] = str(info['mozconfig'])
+
+            if 'topsrcdir' in info:
+                # Continue searching for mach_bootstrap in the source directory.
+                dir_path = info['topsrcdir']
+
+        mach = check_and_get_mach(dir_path)
+        if mach:
+            return mach
+
+    # If we didn't find a source path by scanning for a mozinfo.json, check
+    # whether the directory containing this script is a source directory. We
+    # follow symlinks so mach can be run even if cwd is outside the srcdir.
+    return check_and_get_mach(os.path.dirname(os.path.realpath(__file__)))
+
+def main(args):
+    mach = get_mach()
+    if not mach:
+        print('Could not run mach: No mach source directory found.')
+        sys.exit(1)
+    sys.exit(mach.run(args))
+
+
+if __name__ == '__main__':
+    if sys.platform == 'win32':
+        # This is a complete hack to work around the fact that Windows
+        # multiprocessing needs to import the original module (ie: this
+        # file), but only works if it has a .py extension.
+        #
+        # We do this by a sort of two-level function interposing. The first
+        # level interposes forking.get_command_line() with our version defined
+        # in my_get_command_line(). Our version of get_command_line will
+        # replace the command string with the contents of the fork_interpose()
+        # function to be used in the subprocess.
+        #
+        # The subprocess then gets an interposed imp.find_module(), which we
+        # hack up to find 'mach' without the .py extension, since we already
+        # know where it is (it's us!). If we're not looking for 'mach', then
+        # the original find_module will suffice.
+        #
+        # See also: http://bugs.python.org/issue19946
+        # And: https://bugzilla.mozilla.org/show_bug.cgi?id=914563
+        import inspect
+        from multiprocessing import forking
+        global orig_command_line
+
+        def fork_interpose():
+            import imp
+            import os
+            import sys
+            orig_find_module = imp.find_module
+            def my_find_module(name, dirs):
+                if name == 'mach':
+                    path = os.path.join(dirs[0], 'mach')
+                    f = open(path)
+                    return (f, path, ('', 'r', imp.PY_SOURCE))
+                return orig_find_module(name, dirs)
+
+            # Don't allow writing bytecode file for mach module.
+            orig_load_module = imp.load_module
+            def my_load_module(name, file, path, description):
+                # multiprocess.forking invokes imp.load_module manually and
+                # hard-codes the name __parents_main__ as the module name.
+                if name == '__parents_main__':
+                    old_bytecode = sys.dont_write_bytecode
+                    sys.dont_write_bytecode = True
+                    try:
+                        return orig_load_module(name, file, path, description)
+                    finally:
+                        sys.dont_write_bytecode = old_bytecode
+
+                return orig_load_module(name, file, path, description)
+
+            imp.find_module = my_find_module
+            imp.load_module = my_load_module
+            from multiprocessing.forking import main; main()
+
+        def my_get_command_line():
+            fork_code, lineno = inspect.getsourcelines(fork_interpose)
+            # Remove the first line (for 'def fork_interpose():') and the three
+            # levels of indentation (12 spaces).
+            fork_string = ''.join(x[12:] for x in fork_code[1:])
+            cmdline = orig_command_line()
+            cmdline[2] = fork_string
+            return cmdline
+        orig_command_line = forking.get_command_line
+        forking.get_command_line = my_get_command_line
+
+    main(sys.argv[1:])