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#
#
# Ported from <http://www.scons.org/wiki/SubstInFileBuilder>
# """ This code is freely available for your use. """
#
import re
from SCons.Script import *
def do_subst_in_file(targetfile, sourcefile, dict):
"""Replace all instances of the keys of dict with their values.
For example, if dict is {'%VERSION%': '1.2345', '%BASE%': 'MyProg'},
then all instances of %VERSION% in the file will be replaced with 1.2345 etc.
"""
try:
f = open(sourcefile, 'rb')
contents = f.read()
f.close()
except:
raise SCons.Errors.UserError, "Can't read source file %s"%sourcefile
for (k,v) in dict.items():
contents = re.sub(k, v, contents)
try:
f = open(targetfile, 'wb')
f.write(contents)
f.close()
except:
raise SCons.Errors.UserError, "Can't write target file %s"%targetfile
return 0 # success
def subst_in_file(target, source, env):
if not env.has_key('SUBST_DICT'):
raise SCons.Errors.UserError, "SubstFile requires SUBST_DICT to be set."
d = dict(env['SUBST_DICT']) # copy it
for (k,v) in d.items():
if callable(v):
d[k] = env.subst(v())
elif SCons.Util.is_String(v):
d[k]=env.subst(v)
else:
d[k] = SCons.Util.to_String(v)
for (t,s) in zip(target, source):
return do_subst_in_file(str(t), str(s), d)
def subst_in_file_string(target, source, env):
"""This is what gets printed on the console."""
return '\n'.join(['Substituting vars from %s into %s'%(str(s), str(t))
for (t,s) in zip(target, source)])
def subst_emitter(target, source, env):
"""Add dependency from substituted SUBST_DICT to target.
Returns original target, source tuple unchanged.
"""
d = env['SUBST_DICT'].copy() # copy it
for (k,v) in d.items():
if callable(v):
d[k] = env.subst(v())
elif SCons.Util.is_String(v):
d[k] = env.subst(v)
Depends(target, SCons.Node.Python.Value(d))
return target, source
def generate(env):
subst_action=SCons.Action.Action(subst_in_file, subst_in_file_string)
env['BUILDERS']['SubstFile'] = Builder(action=subst_action, emitter=subst_emitter)
def exists(env):
return 1
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