Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 1 | """Prototype sysconfig module that loads information when run as a script, |
| 2 | but only defines constants when imported. |
| 3 | |
| 4 | This should be run as a script as one of the last steps of the Python |
| 5 | installation process. |
| 6 | |
| 7 | Written by: Fred L. Drake, Jr. |
| 8 | Email: <fdrake@acm.org> |
| 9 | Initial date: 17-Dec-1998 |
| 10 | """ |
| 11 | |
| 12 | __version__ = "$Revision$" |
| 13 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 14 | import os |
| 15 | import re |
| 16 | import string |
| 17 | import sys |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 18 | |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 19 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 20 | def get_config_h_filename(): |
| 21 | return os.path.join(sys.exec_prefix, "lib", "python" + sys.version[:3], |
| 22 | "config", "config.h") |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 23 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 24 | def get_makefile_filename(): |
| 25 | return os.path.join(sys.exec_prefix, "lib", "python" + sys.version[:3], |
| 26 | "config", "Makefile") |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 27 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 28 | def parse_config_h(fp, g=None): |
| 29 | if g is None: |
| 30 | g = {} |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 31 | define_rx = re.compile("#define ([A-Z][A-Z0-9_]+) (.*)\n") |
| 32 | undef_rx = re.compile("/[*] #undef ([A-Z][A-Z0-9_]+) [*]/\n") |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 33 | # |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 34 | while 1: |
| 35 | line = fp.readline() |
| 36 | if not line: |
| 37 | break |
| 38 | m = define_rx.match(line) |
| 39 | if m: |
| 40 | n, v = m.group(1, 2) |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 41 | try: v = string.atoi(v) |
| 42 | except ValueError: pass |
| 43 | g[n] = v |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 44 | else: |
| 45 | m = undef_rx.match(line) |
| 46 | if m: |
| 47 | g[m.group(1)] = 0 |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 48 | return g |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 49 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 50 | def parse_makefile(fp, g=None): |
| 51 | if g is None: |
| 52 | g = {} |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 53 | variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)\n") |
| 54 | done = {} |
| 55 | notdone = {} |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 56 | # |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 57 | while 1: |
| 58 | line = fp.readline() |
| 59 | if not line: |
| 60 | break |
| 61 | m = variable_rx.match(line) |
| 62 | if m: |
| 63 | n, v = m.group(1, 2) |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 64 | v = string.strip(v) |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 65 | if "$" in v: |
| 66 | notdone[n] = v |
| 67 | else: |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 68 | try: v = string.atoi(v) |
| 69 | except ValueError: pass |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 70 | done[n] = v |
| 71 | |
| 72 | # do variable interpolation here |
| 73 | findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)") |
| 74 | findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}") |
| 75 | while notdone: |
| 76 | for name in notdone.keys(): |
| 77 | value = notdone[name] |
| 78 | m = findvar1_rx.search(value) |
| 79 | if not m: |
| 80 | m = findvar2_rx.search(value) |
| 81 | if m: |
| 82 | n = m.group(1) |
| 83 | if done.has_key(n): |
| 84 | after = value[m.end():] |
| 85 | value = value[:m.start()] + done[n] + after |
| 86 | if "$" in after: |
| 87 | notdone[name] = value |
| 88 | else: |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 89 | try: value = string.atoi(value) |
| 90 | except ValueError: pass |
| 91 | done[name] = string.strip(value) |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 92 | del notdone[name] |
| 93 | elif notdone.has_key(n): |
| 94 | # get it on a subsequent round |
| 95 | pass |
| 96 | else: |
| 97 | done[n] = "" |
| 98 | after = value[m.end():] |
| 99 | value = value[:m.start()] + after |
| 100 | if "$" in after: |
| 101 | notdone[name] = value |
| 102 | else: |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 103 | try: value = string.atoi(value) |
| 104 | except ValueError: pass |
| 105 | done[name] = string.strip(value) |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 106 | del notdone[name] |
| 107 | else: |
Greg Ward | 3c8e54b | 1998-12-22 12:42:04 +0000 | [diff] [blame] | 108 | # bogus variable reference; just drop it since we can't deal |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 109 | del notdone[name] |
| 110 | |
| 111 | # save the results in the global dictionary |
| 112 | g.update(done) |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 113 | return g |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 114 | |
| 115 | |
Greg Ward | 9ddaaa1 | 1999-01-06 14:46:06 +0000 | [diff] [blame^] | 116 | def _init_posix(): |
| 117 | g = globals() |
| 118 | # load the installed config.h: |
| 119 | parse_config_h(open(get_config_h_filename()), g) |
| 120 | # load the installed Makefile.pre.in: |
| 121 | parse_makefile(open(get_makefile_filename()), g) |
| 122 | |
| 123 | |
| 124 | |
| 125 | try: |
| 126 | exec "_init_" + os.name |
| 127 | except NameError: |
| 128 | # not needed for this platform |
| 129 | pass |
| 130 | else: |
| 131 | exec "_init_%s()" % os.name |
| 132 | |
Greg Ward | 1190ee3 | 1998-12-18 23:46:33 +0000 | [diff] [blame] | 133 | del _init_posix |