diff options
Diffstat (limited to 'bootstrap.py')
| -rw-r--r-- | bootstrap.py | 139 |
1 files changed, 105 insertions, 34 deletions
diff --git a/bootstrap.py b/bootstrap.py index c6a7db3a..9a88c1c8 100644 --- a/bootstrap.py +++ b/bootstrap.py @@ -1,20 +1,3 @@ -"""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__ # @@ -44,13 +27,97 @@ import getopt import string import sys +__doc__ = """bootstrap.py + +This script supports "bootstrap" execution of the current SCons in +this local source tree by copying of all necessary Python scripts and +modules from underneath the src/ subdirectory into a subdirectory (named +"bootstrap/" by default), and then executing the copied SCons with the +supplied command-line arguments. + +There are a handful of options that are specific to this bootstrap.py +script and which are *not* passed on to the underlying SCons script. +All of these begin with the string "bootstrap_": + + --bootstrap_dir=DIR + + Sets the name of the directory into which the SCons files will + be copied. The default is "bootstrap" in the local subdirectory. + + --bootstrap_force + + Forces a copy of all necessary files. By default, the + bootstrap.py script only updates the bootstrap copy if the + content of the source copy is different. + + --bootstrap_update + + Only updates the bootstrap subdirectory, and then exits. + +In addition to the above options, the bootstrap.py script understands +the -Y and --repository= options, which are used under Aegis to specify +a search path for the source files that may not have been copied in to +the Aegis change. + +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. +""" + +bootstrap_dir = 'bootstrap' +pass_through_args = [] search = ['.'] +update_only = None + +requires_an_argument = 'bootstrap.py: %s requires an argument\n' + +command_line_args = sys.argv[1:] + +def must_copy(dst, src): + if not os.path.exists(dst): + return 1 + return open(dst, 'rb').read() != open(src, 'rb').read() -opts, args = getopt.getopt(sys.argv[1:], "Y:", []) +while command_line_args: + arg = command_line_args.pop(0) -for o, a in opts: - if o == '-Y': - search.append(a) + if arg == '--bootstrap_dir': + try: + bootstrap_dir = command_line_args.pop(0) + except IndexError: + sys.stderr.write(requires_an_argument % arg) + sys.exit(1) + + elif arg[:16] == '--bootstrap_dir=': + bootstrap_dir = arg[16:] + + elif arg == '--bootstrap_force': + def must_copy(dst, src): + return 1 + + elif arg == '--bootstrap_update': + update_only = 1 + + elif arg in ('-Y', '--repository'): + try: + dir = command_line_args.pop(0) + except IndexError: + sys.stderr.write(requires_an_argument % arg) + sys.exit(1) + else: + search.append(dir) + pass_through_args.extend([arg, dir]) + + elif arg[:2] == '-Y': + search.append(arg[2:]) + pass_through_args.append(arg) + + elif arg[:13] == '--repository=': + search.append(arg[13:]) + pass_through_args.append(arg) + + else: + pass_through_args.append(arg) def find(file, search=search): for dir in search: @@ -68,24 +135,28 @@ 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:] + dst = os.path.join(bootstrap_dir, file) + if must_copy(dst, src): + dir = os.path.split(dst)[0] + if not os.path.isdir(dir): + os.makedirs(dir) + try: os.unlink(dst) + except: pass + open(dst, 'wb').write( open(src, 'rb').read() ) + +if update_only: + sys.exit(0) + +args = [ + os.path.split(sys.executable)[1], + os.path.join(bootstrap_dir, scons_py) + ] + pass_through_args sys.stdout.write(string.join(args, " ") + '\n') sys.stdout.flush() -os.environ['SCONS_LIB_DIR'] = os.path.join(subdir, src_engine) +os.environ['SCONS_LIB_DIR'] = os.path.join(bootstrap_dir, src_engine) os.execve(sys.executable, args, os.environ) |