buildtools/wafsamba/configure_file.py

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