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https://github.com/NixOS/nix
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cc24766fa6
For example, instead of doing
#include "nix/store-config.hh"
#include "nix/derived-path.hh"
Now do
#include "nix/store/config.hh"
#include "nix/store/derived-path.hh"
This was originally planned in the issue, and also recent requested by
Eelco.
Most of the change is purely mechanical. There is just one small
additional issue. See how, in the example above, we took this
opportunity to also turn `<comp>-config.hh` into `<comp>/config.hh`.
Well, there was already a `nix/util/config.{cc,hh}`. Even though there
is not a public configuration header for libutil (which also would be
called `nix/util/config.{cc,hh}`) that's still confusing, To avoid any
such confusion, we renamed that to `nix/util/configuration.{cc,hh}`.
Finally, note that the libflake headers already did this, so we didn't
need to do anything to them. We wouldn't want to mistakenly get
`nix/flake/flake/flake.hh`!
Progress on #7876
106 lines
No EOL
2.8 KiB
C++
106 lines
No EOL
2.8 KiB
C++
#include "nix/util/users.hh"
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#include "nix/store/globals.hh"
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#include "nix/store/profiles.hh"
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#include "nix/expr/eval.hh"
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#include "nix/expr/eval-settings.hh"
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namespace nix {
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/* Very hacky way to parse $NIX_PATH, which is colon-separated, but
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can contain URLs (e.g. "nixpkgs=https://bla...:foo=https://"). */
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Strings EvalSettings::parseNixPath(const std::string & s)
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{
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Strings res;
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auto p = s.begin();
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while (p != s.end()) {
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auto start = p;
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auto start2 = p;
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while (p != s.end() && *p != ':') {
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if (*p == '=') start2 = p + 1;
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++p;
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}
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if (p == s.end()) {
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if (p != start) res.push_back(std::string(start, p));
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break;
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}
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if (*p == ':') {
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auto prefix = std::string(start2, s.end());
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if (EvalSettings::isPseudoUrl(prefix) || hasPrefix(prefix, "flake:")) {
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++p;
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while (p != s.end() && *p != ':') ++p;
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}
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res.push_back(std::string(start, p));
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if (p == s.end()) break;
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}
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++p;
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}
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return res;
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}
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EvalSettings::EvalSettings(bool & readOnlyMode, EvalSettings::LookupPathHooks lookupPathHooks)
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: readOnlyMode{readOnlyMode}
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, lookupPathHooks{lookupPathHooks}
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{
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auto var = getEnv("NIX_ABORT_ON_WARN");
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if (var && (var == "1" || var == "yes" || var == "true"))
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builtinsAbortOnWarn = true;
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}
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Strings EvalSettings::getDefaultNixPath()
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{
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Strings res;
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auto add = [&](const Path & p, const std::string & s = std::string()) {
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if (std::filesystem::exists(p)) {
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if (s.empty()) {
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res.push_back(p);
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} else {
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res.push_back(s + "=" + p);
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}
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}
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};
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add(getNixDefExpr() + "/channels");
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add(rootChannelsDir() + "/nixpkgs", "nixpkgs");
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add(rootChannelsDir());
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return res;
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}
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bool EvalSettings::isPseudoUrl(std::string_view s)
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{
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if (s.compare(0, 8, "channel:") == 0) return true;
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size_t pos = s.find("://");
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if (pos == std::string::npos) return false;
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std::string scheme(s, 0, pos);
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return scheme == "http" || scheme == "https" || scheme == "file" || scheme == "channel" || scheme == "git" || scheme == "s3" || scheme == "ssh";
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}
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std::string EvalSettings::resolvePseudoUrl(std::string_view url)
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{
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if (hasPrefix(url, "channel:"))
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return "https://nixos.org/channels/" + std::string(url.substr(8)) + "/nixexprs.tar.xz";
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else
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return std::string(url);
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}
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const std::string & EvalSettings::getCurrentSystem() const
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{
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const auto & evalSystem = currentSystem.get();
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return evalSystem != "" ? evalSystem : settings.thisSystem.get();
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}
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Path getNixDefExpr()
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{
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return settings.useXDGBaseDirectories
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? getStateDir() + "/defexpr"
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: getHome() + "/.nix-defexpr";
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}
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} // namespace nix
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