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Prevent some allocations in environment lookups

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In some places we'll still use the allocating non-const `operator[]`
just because it would otherwise become pretty unreadable.
This commit is contained in:
Robbert van der Helm
2021-10-17 16:10:13 +02:00
parent 93ab5126b2
commit 1eaee22bb9
2 changed files with 12 additions and 9 deletions
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src/plugin/utils.cpp
+5 -4
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@@ -256,12 +256,13 @@ fs::path normalize_plugin_path(const fs::path& windows_library_path,
std::variant<OverridenWinePrefix, fs::path, DefaultWinePrefix> find_wine_prefix(
fs::path windows_plugin_path) {
bp::environment env = boost::this_process::environment();
if (!env["WINEPREFIX"].empty()) {
return OverridenWinePrefix{env["WINEPREFIX"].to_string()};
const bp::environment env = boost::this_process::environment();
if (const auto prefix = env.find("WINEPREFIX");
prefix != env.end() && !prefix->empty()) {
return OverridenWinePrefix{prefix->to_string()};
}
std::optional<fs::path> dosdevices_dir = find_dominating_file(
const std::optional<fs::path> dosdevices_dir = find_dominating_file(
"dosdevices", windows_plugin_path, fs::is_directory);
if (!dosdevices_dir) {
return DefaultWinePrefix{};