forked from lix-project/lix
950b46821f
The attributes previously stored in TreeInfo (narHash, revCount,
lastModified) are now stored in Input. This makes it less arbitrary
what attributes are stored where.
As a result, the lock file format has changed. An entry like
"info": {
"lastModified": 1585405475,
"narHash": "sha256-bESW0n4KgPmZ0luxvwJ+UyATrC6iIltVCsGdLiphVeE="
},
"locked": {
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "b88ff468e9850410070d4e0ccd68c7011f15b2be",
"type": "github"
},
is now stored as
"locked": {
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "b88ff468e9850410070d4e0ccd68c7011f15b2be",
"type": "github",
"lastModified": 1585405475,
"narHash": "sha256-bESW0n4KgPmZ0luxvwJ+UyATrC6iIltVCsGdLiphVeE="
},
The 'Input' class is now a dumb set of attributes. All the fetcher
implementations subclass InputScheme, not Input. This simplifies the
API.
Also, fix substitution of flake inputs. This was broken since lazy
flake fetching started using fetchTree internally.
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
#include "fetchers.hh"
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namespace nix::fetchers {
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std::regex flakeRegex("[a-zA-Z][a-zA-Z0-9_-]*", std::regex::ECMAScript);
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struct IndirectInputScheme : InputScheme
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{
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std::optional<Input> inputFromURL(const ParsedURL & url) override
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{
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if (url.scheme != "flake") return {};
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auto path = tokenizeString<std::vector<std::string>>(url.path, "/");
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std::optional<Hash> rev;
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std::optional<std::string> ref;
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if (path.size() == 1) {
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} else if (path.size() == 2) {
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if (std::regex_match(path[1], revRegex))
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rev = Hash(path[1], htSHA1);
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else if (std::regex_match(path[1], refRegex))
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ref = path[1];
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else
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throw BadURL("in flake URL '%s', '%s' is not a commit hash or branch/tag name", url.url, path[1]);
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} else if (path.size() == 3) {
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if (!std::regex_match(path[1], refRegex))
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throw BadURL("in flake URL '%s', '%s' is not a branch/tag name", url.url, path[1]);
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ref = path[1];
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if (!std::regex_match(path[2], revRegex))
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throw BadURL("in flake URL '%s', '%s' is not a commit hash", url.url, path[2]);
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rev = Hash(path[2], htSHA1);
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} else
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throw BadURL("GitHub URL '%s' is invalid", url.url);
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std::string id = path[0];
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if (!std::regex_match(id, flakeRegex))
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throw BadURL("'%s' is not a valid flake ID", id);
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// FIXME: forbid query params?
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Input input;
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input.direct = false;
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input.attrs.insert_or_assign("type", "indirect");
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input.attrs.insert_or_assign("id", id);
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if (rev) input.attrs.insert_or_assign("rev", rev->gitRev());
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if (ref) input.attrs.insert_or_assign("ref", *ref);
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return input;
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}
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std::optional<Input> inputFromAttrs(const Attrs & attrs) override
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{
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if (maybeGetStrAttr(attrs, "type") != "indirect") return {};
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for (auto & [name, value] : attrs)
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if (name != "type" && name != "id" && name != "ref" && name != "rev" && name != "narHash")
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throw Error("unsupported indirect input attribute '%s'", name);
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auto id = getStrAttr(attrs, "id");
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if (!std::regex_match(id, flakeRegex))
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throw BadURL("'%s' is not a valid flake ID", id);
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Input input;
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input.direct = false;
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input.attrs = attrs;
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return input;
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}
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ParsedURL toURL(const Input & input) override
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{
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ParsedURL url;
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url.scheme = "flake";
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url.path = getStrAttr(input.attrs, "id");
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if (auto ref = input.getRef()) { url.path += '/'; url.path += *ref; };
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if (auto rev = input.getRev()) { url.path += '/'; url.path += rev->gitRev(); };
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return url;
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}
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bool hasAllInfo(const Input & input) override
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{
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return false;
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}
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Input applyOverrides(
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const Input & _input,
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std::optional<std::string> ref,
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std::optional<Hash> rev) override
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{
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auto input(_input);
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if (rev) input.attrs.insert_or_assign("rev", rev->gitRev());
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if (ref) input.attrs.insert_or_assign("ref", *ref);
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return input;
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}
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std::pair<Tree, Input> fetch(ref<Store> store, const Input & input) override
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{
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throw Error("indirect input '%s' cannot be fetched directly", input.to_string());
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}
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};
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static auto r1 = OnStartup([] { registerInputScheme(std::make_unique<IndirectInputScheme>()); });
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}
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