Remove dependence on Aegis symlinks by adding a bootstrap.py script (suggested by Anthony Roach) to collect the current SCons into a bootstrap/ subdirectory for execution.

1 files changed, 91 insertions, 0 deletions

diff --git a/bootstrap.py b/bootstrap.py
new file mode 100644
index 00000000..78fe0917
--- /dev/null
+++ b/bootstrap.py
@@ -0,0 +1,91 @@
+"""bootstrap.py
+
+This is an Aegis-to-SCons build script that collects a copy of the
+current SCons into a bootstrap/ subdirectory and then executes it with
+the supplied command-line options.
+
+Right now, it only understands the SCons -Y option, which is the only
+one currently used.  It collects the repositories specified by -Y and
+searches them, in order, for the pieces of SCons to copy into the local
+bootstrap/ subdirectory.
+
+This is essentially a minimal build of SCons to bootstrap ourselves into
+executing it for the full build of all the packages, as specified in our
+local SConstruct file.
+
+"""
+
+#
+# Copyright (c) 2001, 2002 Steven Knight
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+import os
+import os.path
+import getopt
+import string
+import sys
+
+search = ['.']
+
+opts, args = getopt.getopt(sys.argv[1:], "Y:", [])
+
+for o, a in opts:
+    if o == '-Y':
+        search.append(a)
+
+def find(file, search=search):
+    for dir in search:
+        f = os.path.join(dir, file)
+	if os.path.exists(f):
+	    return os.path.normpath(f)
+    sys.stderr.write("could not find `%s' in search path:\n" % file)
+    sys.stderr.write("\t" + string.join(search, "\n\t") + "\n")
+    sys.exit(2)
+
+scons_py = os.path.join('src', 'script', 'scons.py')
+src_engine = os.path.join('src', 'engine')
+MANIFEST_in = find(os.path.join(src_engine, 'MANIFEST.in'))
+
+files = [ scons_py ] + map(lambda x: os.path.join(src_engine, x[:-1]),
+                           open(MANIFEST_in).readlines())
+
+subdir = 'bootstrap'
+
+for file in files:
+    src = find(file)
+    dst = os.path.join(subdir, file)
+    dir, _ = os.path.split(dst)
+    if not os.path.isdir(dir):
+        os.makedirs(dir)
+    contents = open(src, 'rb').read()
+    try: os.unlink(dst)
+    except: pass
+    open(dst, 'wb').write(contents)
+
+args = [ sys.executable, os.path.join(subdir, scons_py) ] + sys.argv[1:]
+
+sys.stdout.write(string.join(args, " ") + '\n')
+sys.stdout.flush()
+
+os.environ['SCONS_LIB_DIR'] = os.path.join(subdir, src_engine)
+
+os.execve(sys.executable, args, os.environ)