diff options
Diffstat (limited to 'src/script/scons.py')
| -rwxr-xr-x[-rw-r--r--] | src/script/scons.py | 113 |
1 files changed, 58 insertions, 55 deletions
diff --git a/src/script/scons.py b/src/script/scons.py index bee0224..e58d8e2 100644..100755 --- a/src/script/scons.py +++ b/src/script/scons.py @@ -2,7 +2,7 @@ # # SCons - a Software Constructor # -# Copyright (c) 2001 - 2017 The SCons Foundation +# Copyright (c) 2001 - 2019 The SCons Foundation # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the @@ -25,22 +25,30 @@ from __future__ import print_function -__revision__ = "src/script/scons.py rel_3.0.0:4395:8972f6a2f699 2017/09/18 12:59:24 bdbaddog" +__revision__ = "src/script/scons.py 103260fce95bf5db1c35fb2371983087d85dd611 2019-07-13 18:25:30 bdbaddog" -__version__ = "3.0.0" +__version__ = "3.0.5" -__build__ = "rel_3.0.0:4395:8972f6a2f699" +__build__ = "103260fce95bf5db1c35fb2371983087d85dd611" -__buildsys__ = "ubuntu-16" +__buildsys__ = "Williams-MBP-2" -__date__ = "2017/09/18 12:59:24" +__date__ = "2019-07-13 18:25:30" __developer__ = "bdbaddog" +# This is the entry point to the SCons program. +# The only job of this script is to work out where the guts of the program +# could be and import them, where the real work begins. +# SCons can be invoked several different ways +# - from an installed location +# - from a "local install" copy +# - from a source tree, which has a different dir struture than the other two +# Try to account for all those possibilities. + import os import sys - ############################################################################## # BEGIN STANDARD SCons SCRIPT HEADER # @@ -50,57 +58,53 @@ import sys # should also change other scripts that use this same header. ############################################################################## -# Strip the script directory from sys.path() so on case-insensitive -# (WIN32) systems Python doesn't think that the "scons" script is the -# "SCons" package. Replace it with our own library directories -# (version-specific first, in case they installed by hand there, -# followed by generic) so we pick up the right version of the build -# engine modules if they're in either directory. - - +# compatibility check if (3,0,0) < sys.version_info < (3,5,0) or sys.version_info < (2,7,0): msg = "scons: *** SCons version %s does not run under Python version %s.\n\ -Python < 3.5 is not yet supported.\n" +Python 2.7 or >= 3.5 is required.\n" sys.stderr.write(msg % (__version__, sys.version.split()[0])) sys.exit(1) - -script_dir = sys.path[0] - -if script_dir in sys.path: - sys.path.remove(script_dir) +# Strip the script directory from sys.path so on case-insensitive +# (WIN32) systems Python doesn't think that the "scons" script is the +# "SCons" package. +script_dir = os.path.dirname(os.path.realpath(__file__)) +script_path = os.path.realpath(os.path.dirname(__file__)) +if script_path in sys.path: + sys.path.remove(script_path) libs = [] if "SCONS_LIB_DIR" in os.environ: libs.append(os.environ["SCONS_LIB_DIR"]) -# - running from source takes priority (since 2.3.2), excluding SCONS_LIB_DIR settings -script_path = os.path.abspath(os.path.dirname(__file__)) -source_path = os.path.join(script_path, '..', 'engine') -libs.append(source_path) +# running from source takes 2nd priority (since 2.3.2), following SCONS_LIB_DIR +source_path = os.path.join(script_path, os.pardir, 'engine') +if os.path.isdir(source_path): + libs.append(source_path) +# add local-install locations local_version = 'scons-local-' + __version__ local = 'scons-local' if script_dir: local_version = os.path.join(script_dir, local_version) local = os.path.join(script_dir, local) -libs.append(os.path.abspath(local_version)) -libs.append(os.path.abspath(local)) +if os.path.isdir(local_version): + libs.append(os.path.abspath(local_version)) +if os.path.isdir(local): + libs.append(os.path.abspath(local)) scons_version = 'scons-%s' % __version__ # preferred order of scons lookup paths prefs = [] - -# - running from egg check +# if we can find package information, use it try: import pkg_resources except ImportError: pass else: - # when running from an egg add the egg's directory try: d = pkg_resources.get_distribution('scons') except pkg_resources.DistributionNotFound: @@ -109,18 +113,18 @@ else: prefs.append(d.location) if sys.platform == 'win32': - # sys.prefix is (likely) C:\Python*; - # check only C:\Python*. + # Use only sys.prefix on Windows prefs.append(sys.prefix) prefs.append(os.path.join(sys.prefix, 'Lib', 'site-packages')) else: # On other (POSIX) platforms, things are more complicated due to - # the variety of path names and library locations. Try to be smart - # about it. + # the variety of path names and library locations. + # Build up some possibilities, then transform them into candidates + temp = [] if script_dir == 'bin': # script_dir is `pwd`/bin; # check `pwd`/lib/scons*. - prefs.append(os.getcwd()) + temp.append(os.getcwd()) else: if script_dir == '.' or script_dir == '': script_dir = os.getcwd() @@ -128,42 +132,41 @@ else: if tail == "bin": # script_dir is /foo/bin; # check /foo/lib/scons*. - prefs.append(head) + temp.append(head) head, tail = os.path.split(sys.prefix) if tail == "usr": # sys.prefix is /foo/usr; # check /foo/usr/lib/scons* first, # then /foo/usr/local/lib/scons*. - prefs.append(sys.prefix) - prefs.append(os.path.join(sys.prefix, "local")) + temp.append(sys.prefix) + temp.append(os.path.join(sys.prefix, "local")) elif tail == "local": h, t = os.path.split(head) if t == "usr": # sys.prefix is /foo/usr/local; # check /foo/usr/local/lib/scons* first, # then /foo/usr/lib/scons*. - prefs.append(sys.prefix) - prefs.append(head) + temp.append(sys.prefix) + temp.append(head) else: # sys.prefix is /foo/local; # check only /foo/local/lib/scons*. - prefs.append(sys.prefix) + temp.append(sys.prefix) else: # sys.prefix is /foo (ends in neither /usr or /local); # check only /foo/lib/scons*. - prefs.append(sys.prefix) + temp.append(sys.prefix) + + # suffix these to add to our original prefs: + prefs.extend([os.path.join(x, 'lib') for x in temp]) + prefs.extend([os.path.join(x, 'lib', 'python' + sys.version[:3], + 'site-packages') for x in temp]) - temp = [os.path.join(x, 'lib') for x in prefs] - temp.extend([os.path.join(x, - 'lib', - 'python' + sys.version[:3], - 'site-packages') for x in prefs]) - prefs = temp # Add the parent directory of the current python's library to the - # preferences. On SuSE-91/AMD64, for example, this is /usr/lib64, - # not /usr/lib. + # preferences. This picks up differences between, e.g., lib and lib64, + # and finds the base location in case of a non-copying virtualenv. try: libpath = os.__file__ except AttributeError: @@ -177,9 +180,9 @@ else: prefs.append(libpath) # Look first for 'scons-__version__' in all of our preference libs, -# then for 'scons'. -libs.extend([os.path.join(x, scons_version) for x in prefs]) -libs.extend([os.path.join(x, 'scons') for x in prefs]) +# then for 'scons'. Skip paths that do not exist. +libs.extend([os.path.join(x, scons_version) for x in prefs if os.path.isdir(x)]) +libs.extend([os.path.join(x, 'scons') for x in prefs if os.path.isdir(x)]) sys.path = libs + sys.path @@ -191,9 +194,9 @@ if __name__ == "__main__": try: import SCons.Script except ImportError: - print("SCons import failed. Unable to find engine files in:") + sys.stderr.write("SCons import failed. Unable to find engine files in:\n") for path in libs: - print(" {}".format(path)) + sys.stderr.write(" {}\n".format(path)) raise # this does all the work, and calls sys.exit |