buildtools/wafsamba/configure_file.py

   1 # handle substitution of variables in .in files
   2
   3 import sys
   4 import re
   5 import os
   6 from waflib import Build, Logs
   7 from samba_utils import SUBST_VARS_RECURSIVE
   8
   9 def subst_at_vars(task):
  10     '''substiture @VAR@ style variables in a file'''
  11
  12     env = task.env
  13     s = task.inputs[0].read()
  14
  15     # split on the vars
  16     a = re.split('(@\w+@)', s)
  17     out = []
  18     for v in a:
  19         if re.match('@\w+@', v):
  20             vname = v[1:-1]
  21             if not vname in task.env and vname.upper() in task.env:
  22                 vname = vname.upper()
  23             if not vname in task.env:
  24                 Logs.error("Unknown substitution %s in %s" % (v, task.name))
  25                 sys.exit(1)
  26             v = SUBST_VARS_RECURSIVE(task.env[vname], task.env)
  27         out.append(v)
  28     contents = ''.join(out)
  29     task.outputs[0].write(contents)
  30     return 0
  31
  32 def CONFIGURE_FILE(bld, in_file, **kwargs):
  33     '''configure file'''
  34
  35     base=os.path.basename(in_file)
  36     t = bld.SAMBA_GENERATOR('INFILE_%s' % base,
  37                             rule = subst_at_vars,
  38                             source = in_file + '.in',
  39                             target = in_file,
  40                             vars = kwargs)
  41 Build.BuildContext.CONFIGURE_FILE = CONFIGURE_FILE