diff options
author | William Deegan <bill@baddogconsulting.com> | 2017-08-05 00:36:01 (GMT) |
---|---|---|
committer | William Deegan <bill@baddogconsulting.com> | 2017-08-05 00:36:01 (GMT) |
commit | 3ed61160828b50e768c99fc70f41a6d115ea082f (patch) | |
tree | 915220271d7722b3ee21540e1755495ec01908f7 /src | |
parent | eb9fd66f82ef92e178a3d3d9142c04272b5afb30 (diff) | |
download | SCons-3ed61160828b50e768c99fc70f41a6d115ea082f.zip SCons-3ed61160828b50e768c99fc70f41a6d115ea082f.tar.gz SCons-3ed61160828b50e768c99fc70f41a6d115ea082f.tar.bz2 |
merged
Diffstat (limited to 'src')
-rw-r--r-- | src/engine/SCons/EnvironmentValues.py | 97 | ||||
-rw-r--r-- | src/engine/SCons/EnvironmentValuesTest.py | 16 |
2 files changed, 113 insertions, 0 deletions
diff --git a/src/engine/SCons/EnvironmentValues.py b/src/engine/SCons/EnvironmentValues.py new file mode 100644 index 0000000..e2efccb --- /dev/null +++ b/src/engine/SCons/EnvironmentValues.py @@ -0,0 +1,97 @@ +import re + +_is_valid_var = re.compile(r'[_a-zA-Z]\w*$') + +_rm = re.compile(r'\$[()]') +_remove = re.compile(r'\$\([^\$]*(\$[^\)][^\$]*)*\$\)') + +# Regular expressions for splitting strings and handling substitutions, +# for use by the scons_subst() and scons_subst_list() functions: +# +# The first expression compiled matches all of the $-introduced tokens +# that we need to process in some way, and is used for substitutions. +# The expressions it matches are: +# +# "$$" +# "$(" +# "$)" +# "$variable" [must begin with alphabetic or underscore] +# "${any stuff}" +# +# The second expression compiled is used for splitting strings into tokens +# to be processed, and it matches all of the tokens listed above, plus +# the following that affect how arguments do or don't get joined together: +# +# " " [white space] +# "non-white-space" [without any dollar signs] +# "$" [single dollar sign] +# +_dollar_exps_str = r'\$[\$\(\)]|\$[_a-zA-Z][\.\w]*|\${[^}]*}' +_dollar_exps = re.compile(r'(%s)' % _dollar_exps_str) +_separate_args = re.compile(r'(%s|\s+|[^\s\$]+|\$)' % _dollar_exps_str) + +# This regular expression is used to replace strings of multiple white +# space characters in the string result from the scons_subst() function. +_space_sep = re.compile(r'[\t ]+(?![^{]*})') + +class ValueTypes(object): + """ + Enum to store what type of value the variable holds. + """ + UNKNOWN = 0 + STRING = 1 + CALLABLE = 2 + VARIABLE = 3 + + +class EnvironmentValue(object): + """ + Hold a single value. We're going to cache parsed version of the file + We're going to keep track of variables which feed into this values evaluation + """ + def __init__(self, value): + self.value = value + self.var_type = ValueTypes.UNKNOWN + + if callable(self.value): + self.var_type = ValueTypes.CALLABLE + else: + self.parse_value() + + + def parse_value(self): + """ + Scan the string and break into component values + """ + + try: + if '$' not in self.value: + self._parsed = self.value + self.var_type = ValueTypes.STRING + else: + # Now we need to parse the specified string + result = _dollar_exps.sub(sub_match, args) + print(result) + pass + except TypeError: + # likely callable? either way we don't parse + self._parsed = self.value + + def parse_trial(self): + """ + Try alternate parsing methods. + :return: + """ + parts = [] + for c in self.value: + + + +class EnvironmentValues(object): + """ + A class to hold all the environment variables + """ + def __init__(self, **kw): + self._dict = {} + for k in kw: + self._dict[k] = EnvironmentValue(kw[k]) diff --git a/src/engine/SCons/EnvironmentValuesTest.py b/src/engine/SCons/EnvironmentValuesTest.py new file mode 100644 index 0000000..58ee9cf --- /dev/null +++ b/src/engine/SCons/EnvironmentValuesTest.py @@ -0,0 +1,16 @@ +import unittest + +from SCons.EnvironmentValues import EnvironmentValues + +class MyTestCase(unittest.TestCase): + def test_simple_environmentValues(self): + """Test comparing SubstitutionEnvironments + """ + + env1 = EnvironmentValues(XXX='x') + env2 = EnvironmentValues(XXX='x',XX="$X", X1="${X}", X2="$($X$)") + + + +if __name__ == '__main__': + unittest.main() |