mirror of
https://github.com/NixOS/nix
synced 2025-06-27 12:41:15 +02:00
9535f8bdc3
* It is tough to contribute to a project that doesn't use a formatter, * It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files * Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose, Let's rip the bandaid off? Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge.
111 lines
No EOL
2.9 KiB
C++
111 lines
No EOL
2.9 KiB
C++
#include "nix/util/users.hh"
|
|
#include "nix/store/globals.hh"
|
|
#include "nix/store/profiles.hh"
|
|
#include "nix/expr/eval.hh"
|
|
#include "nix/expr/eval-settings.hh"
|
|
|
|
namespace nix {
|
|
|
|
/* Very hacky way to parse $NIX_PATH, which is colon-separated, but
|
|
can contain URLs (e.g. "nixpkgs=https://bla...:foo=https://"). */
|
|
Strings EvalSettings::parseNixPath(const std::string & s)
|
|
{
|
|
Strings res;
|
|
|
|
auto p = s.begin();
|
|
|
|
while (p != s.end()) {
|
|
auto start = p;
|
|
auto start2 = p;
|
|
|
|
while (p != s.end() && *p != ':') {
|
|
if (*p == '=')
|
|
start2 = p + 1;
|
|
++p;
|
|
}
|
|
|
|
if (p == s.end()) {
|
|
if (p != start)
|
|
res.push_back(std::string(start, p));
|
|
break;
|
|
}
|
|
|
|
if (*p == ':') {
|
|
auto prefix = std::string(start2, s.end());
|
|
if (EvalSettings::isPseudoUrl(prefix) || hasPrefix(prefix, "flake:")) {
|
|
++p;
|
|
while (p != s.end() && *p != ':')
|
|
++p;
|
|
}
|
|
res.push_back(std::string(start, p));
|
|
if (p == s.end())
|
|
break;
|
|
}
|
|
|
|
++p;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
EvalSettings::EvalSettings(bool & readOnlyMode, EvalSettings::LookupPathHooks lookupPathHooks)
|
|
: readOnlyMode{readOnlyMode}
|
|
, lookupPathHooks{lookupPathHooks}
|
|
{
|
|
auto var = getEnv("NIX_ABORT_ON_WARN");
|
|
if (var && (var == "1" || var == "yes" || var == "true"))
|
|
builtinsAbortOnWarn = true;
|
|
}
|
|
|
|
Strings EvalSettings::getDefaultNixPath()
|
|
{
|
|
Strings res;
|
|
auto add = [&](const Path & p, const std::string & s = std::string()) {
|
|
if (std::filesystem::exists(p)) {
|
|
if (s.empty()) {
|
|
res.push_back(p);
|
|
} else {
|
|
res.push_back(s + "=" + p);
|
|
}
|
|
}
|
|
};
|
|
|
|
add(getNixDefExpr() + "/channels");
|
|
add(rootChannelsDir() + "/nixpkgs", "nixpkgs");
|
|
add(rootChannelsDir());
|
|
|
|
return res;
|
|
}
|
|
|
|
bool EvalSettings::isPseudoUrl(std::string_view s)
|
|
{
|
|
if (s.compare(0, 8, "channel:") == 0)
|
|
return true;
|
|
size_t pos = s.find("://");
|
|
if (pos == std::string::npos)
|
|
return false;
|
|
std::string scheme(s, 0, pos);
|
|
return scheme == "http" || scheme == "https" || scheme == "file" || scheme == "channel" || scheme == "git"
|
|
|| scheme == "s3" || scheme == "ssh";
|
|
}
|
|
|
|
std::string EvalSettings::resolvePseudoUrl(std::string_view url)
|
|
{
|
|
if (hasPrefix(url, "channel:"))
|
|
return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz";
|
|
else
|
|
return std::string(url);
|
|
}
|
|
|
|
const std::string & EvalSettings::getCurrentSystem() const
|
|
{
|
|
const auto & evalSystem = currentSystem.get();
|
|
return evalSystem != "" ? evalSystem : settings.thisSystem.get();
|
|
}
|
|
|
|
Path getNixDefExpr()
|
|
{
|
|
return settings.useXDGBaseDirectories ? getStateDir() + "/defexpr" : getHome() + "/.nix-defexpr";
|
|
}
|
|
|
|
} // namespace nix
|