AbstractConfigValue lookupSubst(
ResolveContext context, SubstitutionExpression subst, int prefixLength)
throws NotPossibleToResolve {
context.trace(subst);
try {
// First we look up the full path, which means relative to the
// included file if we were not a root file
AbstractConfigValue result = findInObject(root, context, subst);
if (result == null) {
// Then we want to check relative to the root file. We don't
// want the prefix we were included at to be used when looking
// up env variables either.
SubstitutionExpression unprefixed = subst.changePath(subst.path().subPath(prefixLength));
// replace the debug trace path
context.untrace();
context.trace(unprefixed);
if (prefixLength > 0) {
result = findInObject(root, context, unprefixed);
}
if (result == null && context.options().getUseSystemEnvironment()) {
result = findInObject(ConfigImpl.envVariablesAsConfigObject(), context, unprefixed);
}
}
if (result != null) {
result = context.resolve(result);
}
return result;
} finally {
context.untrace();
}
}
