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Code Activity

Clean up SearchPath

Browse source 
- Better types

- Own header / C++ file pair

- Test factored out methods

- Pass parsed thing around more than strings

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
This commit is contained in:
John Ericson 2023-06-23 13:51:25 -04:00
parent 87dcd09047
commit be518e73ae
12 changed files with 300 additions and 64 deletions
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47
src/libexpr/parser.y
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@ -734,22 +734,9 @@ Expr * EvalState::parseStdin()
}
void EvalState::addToSearchPath(const std::string & s)
void EvalState::addToSearchPath(SearchPath::Elem && elem)
{
size_t pos = s.find('=');
std::string prefix;
Path path;
if (pos == std::string::npos) {
path = s;
} else {
prefix = std::string(s, 0, pos);
path = std::string(s, pos + 1);
}
searchPath.emplace_back(SearchPathElem {
.prefix = prefix,
.path = path,
});
searchPath.elements.emplace_back(std::move(elem));
}
@ -759,22 +746,19 @@ SourcePath EvalState::findFile(const std::string_view path)
}
SourcePath EvalState::findFile(SearchPath & searchPath, const std::string_view path, const PosIdx pos)
SourcePath EvalState::findFile(const SearchPath & searchPath, const std::string_view path, const PosIdx pos)
{
for (auto & i : searchPath) {
std::string suffix;
if (i.prefix.empty())
suffix = concatStrings("/", path);
else {
auto s = i.prefix.size();
if (path.compare(0, s, i.prefix) != 0 ||
(path.size() > s && path[s] != '/'))
continue;
suffix = path.size() == s ? "" : concatStrings("/", path.substr(s));
}
auto r = resolveSearchPathElem(i.path);
if (!r) continue;
Path res = *r + suffix;
for (auto & i : searchPath.elements) {
auto suffixOpt = i.prefix.suffixIfPotentialMatch(path);
if (!suffixOpt) continue;
auto suffix = *suffixOpt;
auto rOpt = resolveSearchPathPath(i.path);
if (!rOpt) continue;
auto r = *rOpt;
Path res = suffix == "" ? r : concatStrings(r, "/", suffix);
if (pathExists(res)) return CanonPath(canonPath(res));
}
@ -791,8 +775,9 @@ SourcePath EvalState::findFile(SearchPath & searchPath, const std::string_view p
}
std::optional<std::string> EvalState::resolveSearchPathElem(const std::string & value)
std::optional<std::string> EvalState::resolveSearchPathPath(const SearchPath::Path & value0)
{
auto & value = value0.s;
auto i = searchPathResolved.find(value);
if (i != searchPathResolved.end()) return i->second;