mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-24 23:06:16 +02:00
52bfccf8d8
Progress on #5638 There is still a global eval settings, but it pushed down into `libnixcmd`, which is a lot less bad a place for this sort of thing.
111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
#include "users.hh"
|
|
#include "config-global.hh"
|
|
#include "globals.hh"
|
|
#include "profiles.hh"
|
|
#include "eval.hh"
|
|
#include "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://"). */
|
|
static Strings 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)
|
|
: readOnlyMode{readOnlyMode}
|
|
{
|
|
auto var = getEnv("NIX_PATH");
|
|
if (var) nixPath = parseNixPath(*var);
|
|
|
|
var = getEnv("NIX_ABORT_ON_WARN");
|
|
if (var && (var == "1" || var == "yes" || var == "true"))
|
|
builtinsAbortOnWarn = true;
|
|
}
|
|
|
|
Strings EvalSettings::getDefaultNixPath() const
|
|
{
|
|
Strings res;
|
|
auto add = [&](const Path & p, const std::string & s = std::string()) {
|
|
if (pathAccessible(p)) {
|
|
if (s.empty()) {
|
|
res.push_back(p);
|
|
} else {
|
|
res.push_back(s + "=" + p);
|
|
}
|
|
}
|
|
};
|
|
|
|
if (!restrictEval && !pureEval) {
|
|
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() + "/nix/defexpr"
|
|
: getHome() + "/.nix-defexpr";
|
|
}
|
|
|
|
}
|