mirror of
https://github.com/open-source-parsers/jsoncpp.git
synced 2024-12-12 18:10:27 +01:00
80 lines
3.2 KiB
Python
80 lines
3.2 KiB
Python
import re
|
|
from SCons.Script import * # the usual scons stuff you get in a SConscript
|
|
|
|
def generate(env):
|
|
"""
|
|
Add builders and construction variables for the
|
|
SubstInFile tool.
|
|
|
|
Adds SubstInFile builder, which substitutes the keys->values of SUBST_DICT
|
|
from the source to the target.
|
|
The values of SUBST_DICT first have any construction variables expanded
|
|
(its keys are not expanded).
|
|
If a value of SUBST_DICT is a python callable function, it is called and
|
|
the result is expanded as the value.
|
|
If there's more than one source and more than one target, each target gets
|
|
substituted from the corresponding source.
|
|
"""
|
|
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, "SubstInFile 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()).replace('\\','\\\\')
|
|
elif SCons.Util.is_String(v):
|
|
d[k] = env.subst(v).replace('\\','\\\\')
|
|
else:
|
|
raise SCons.Errors.UserError, "SubstInFile: key %s: %s must be a string or callable"%(k, repr(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
|
|
|
|
## env.Append(TOOLS = 'substinfile') # this should be automaticaly done by Scons ?!?
|
|
subst_action = SCons.Action.Action( subst_in_file, subst_in_file_string )
|
|
env['BUILDERS']['SubstInFile'] = Builder(action=subst_action, emitter=subst_emitter)
|
|
|
|
def exists(env):
|
|
"""
|
|
Make sure tool exists.
|
|
"""
|
|
return True
|