mirror of
https://github.com/NixOS/nix
synced 2025-06-26 11:41:15 +02:00
Backport libfetchers from the flakes branch
This provides a pluggable mechanism for defining new fetchers. It adds
a builtin function 'fetchTree' that generalizes existing fetchers like
'fetchGit', 'fetchMercurial' and 'fetchTarball'. 'fetchTree' takes a
set of attributes, e.g.
fetchTree {
type = "git";
url = "https://example.org/repo.git";
ref = "some-branch";
rev = "abcdef...";
}
The existing fetchers are just wrappers around this. Note that the
input attributes to fetchTree are the same as flake input
specifications and flake lock file entries.
All fetchers share a common cache stored in
~/.cache/nix/fetcher-cache-v1.sqlite. This replaces the ad hoc caching
mechanisms in fetchGit and download.cc (e.g. ~/.cache/nix/{tarballs,git-revs*}).
This also adds support for Git worktrees (c169ea5904).
This commit is contained in:
Eelco Dolstra
parent
ebb20a5356
commit
462421d345
36 changed files with 2199 additions and 647 deletions
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@ -3,6 +3,8 @@
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#include "download.hh"
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#include "util.hh"
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#include "eval.hh"
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#include "fetchers.hh"
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#include "store-api.hh"
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namespace nix {
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@ -46,9 +48,9 @@ Bindings * MixEvalArgs::getAutoArgs(EvalState & state)
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Path lookupFileArg(EvalState & state, string s)
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{
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if (isUri(s)) {
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CachedDownloadRequest request(s);
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request.unpack = true;
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return getDownloader()->downloadCached(state.store, request).path;
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return state.store->toRealPath(
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fetchers::downloadTarball(
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state.store, resolveUri(s), "source", false).storePath);
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} else if (s.size() > 2 && s.at(0) == '<' && s.at(s.size() - 1) == '>') {
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Path p = s.substr(1, s.size() - 2);
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return state.findFile(p);
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@ -6,9 +6,9 @@ libexpr_DIR := $(d)
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libexpr_SOURCES := $(wildcard $(d)/*.cc) $(wildcard $(d)/primops/*.cc) $(d)/lexer-tab.cc $(d)/parser-tab.cc
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libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libmain -I src/libexpr
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libexpr_CXXFLAGS += -I src/libutil -I src/libstore -I src/libfetchers -I src/libmain -I src/libexpr
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libexpr_LIBS = libutil libstore libnixrust
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libexpr_LIBS = libutil libstore libfetchers libnixrust
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libexpr_LDFLAGS =
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ifneq ($(OS), FreeBSD)
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@ -545,6 +545,7 @@ formal
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#include "eval.hh"
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#include "download.hh"
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#include "fetchers.hh"
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#include "store-api.hh"
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@ -687,9 +688,8 @@ std::pair<bool, std::string> EvalState::resolveSearchPathElem(const SearchPathEl
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if (isUri(elem.second)) {
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try {
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CachedDownloadRequest request(elem.second);
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request.unpack = true;
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res = { true, getDownloader()->downloadCached(store, request).path };
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res = { true, store->toRealPath(fetchers::downloadTarball(
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store, resolveUri(elem.second), "source", false).storePath) };
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} catch (DownloadError & e) {
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printError(format("warning: Nix search path entry '%1%' cannot be downloaded, ignoring") % elem.second);
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res = { false, "" };
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@ -1,6 +1,5 @@
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#include "archive.hh"
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#include "derivations.hh"
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#include "download.hh"
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#include "eval-inline.hh"
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#include "eval.hh"
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#include "globals.hh"
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@ -2045,68 +2044,6 @@ static void prim_splitVersion(EvalState & state, const Pos & pos, Value * * args
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}
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/*************************************************************
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* Networking
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*************************************************************/
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void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
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const string & who, bool unpack, const std::string & defaultName)
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{
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CachedDownloadRequest request("");
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request.unpack = unpack;
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request.name = defaultName;
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state.forceValue(*args[0]);
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if (args[0]->type == tAttrs) {
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state.forceAttrs(*args[0], pos);
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for (auto & attr : *args[0]->attrs) {
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string n(attr.name);
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if (n == "url")
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request.uri = state.forceStringNoCtx(*attr.value, *attr.pos);
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else if (n == "sha256")
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request.expectedHash = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
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else if (n == "name")
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request.name = state.forceStringNoCtx(*attr.value, *attr.pos);
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else
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throw EvalError(format("unsupported argument '%1%' to '%2%', at %3%") % attr.name % who % attr.pos);
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}
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if (request.uri.empty())
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throw EvalError(format("'url' argument required, at %1%") % pos);
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} else
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request.uri = state.forceStringNoCtx(*args[0], pos);
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state.checkURI(request.uri);
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if (evalSettings.pureEval && !request.expectedHash)
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throw Error("in pure evaluation mode, '%s' requires a 'sha256' argument", who);
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auto res = getDownloader()->downloadCached(state.store, request);
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if (state.allowedPaths)
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state.allowedPaths->insert(res.path);
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mkString(v, res.storePath, PathSet({res.storePath}));
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}
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static void prim_fetchurl(EvalState & state, const Pos & pos, Value * * args, Value & v)
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{
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fetch(state, pos, args, v, "fetchurl", false, "");
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}
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static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args, Value & v)
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{
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fetch(state, pos, args, v, "fetchTarball", true, "source");
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}
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/*************************************************************
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* Primop registration
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*************************************************************/
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@ -2289,10 +2226,6 @@ void EvalState::createBaseEnv()
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addPrimOp("derivationStrict", 1, prim_derivationStrict);
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addPrimOp("placeholder", 1, prim_placeholder);
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// Networking
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addPrimOp("__fetchurl", 1, prim_fetchurl);
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addPrimOp("fetchTarball", 1, prim_fetchTarball);
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/* Add a wrapper around the derivation primop that computes the
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`drvPath' and `outPath' attributes lazily. */
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string path = canonPath(settings.nixDataDir + "/nix/corepkgs/derivation.nix", true);
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@ -20,6 +20,7 @@ struct RegisterPrimOp
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them. */
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/* Load a ValueInitializer from a DSO and return whatever it initializes */
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void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value & v);
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/* Execute a program and parse its output */
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void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v);
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@ -1,202 +1,17 @@
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#include "primops.hh"
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#include "eval-inline.hh"
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#include "download.hh"
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#include "store-api.hh"
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#include "pathlocks.hh"
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#include "hash.hh"
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#include "tarfile.hh"
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#include <sys/time.h>
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#include <regex>
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#include <nlohmann/json.hpp>
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using namespace std::string_literals;
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#include "fetchers.hh"
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#include "url.hh"
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namespace nix {
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struct GitInfo
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{
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Path storePath;
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std::string rev;
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std::string shortRev;
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uint64_t revCount = 0;
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};
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std::regex revRegex("^[0-9a-fA-F]{40}$");
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GitInfo exportGit(ref<Store> store, const std::string & uri,
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std::optional<std::string> ref, std::string rev,
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const std::string & name)
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{
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if (evalSettings.pureEval && rev == "")
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throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
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if (!ref && rev == "" && hasPrefix(uri, "/") && pathExists(uri + "/.git")) {
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bool clean = true;
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try {
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runProgram("git", true, { "-C", uri, "diff-index", "--quiet", "HEAD", "--" });
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} catch (ExecError & e) {
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if (!WIFEXITED(e.status) || WEXITSTATUS(e.status) != 1) throw;
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clean = false;
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}
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if (!clean) {
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/* This is an unclean working tree. So copy all tracked files. */
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GitInfo gitInfo;
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gitInfo.rev = "0000000000000000000000000000000000000000";
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gitInfo.shortRev = std::string(gitInfo.rev, 0, 7);
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auto files = tokenizeString<std::set<std::string>>(
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runProgram("git", true, { "-C", uri, "ls-files", "-z" }), "\0"s);
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PathFilter filter = [&](const Path & p) -> bool {
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assert(hasPrefix(p, uri));
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std::string file(p, uri.size() + 1);
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auto st = lstat(p);
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if (S_ISDIR(st.st_mode)) {
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auto prefix = file + "/";
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auto i = files.lower_bound(prefix);
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return i != files.end() && hasPrefix(*i, prefix);
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}
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return files.count(file);
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};
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gitInfo.storePath = store->printStorePath(store->addToStore("source", uri, true, htSHA256, filter));
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return gitInfo;
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}
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// clean working tree, but no ref or rev specified. Use 'HEAD'.
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rev = chomp(runProgram("git", true, { "-C", uri, "rev-parse", "HEAD" }));
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ref = "HEAD"s;
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}
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if (!ref) ref = "HEAD"s;
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if (rev != "" && !std::regex_match(rev, revRegex))
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throw Error("invalid Git revision '%s'", rev);
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deletePath(getCacheDir() + "/nix/git");
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Path cacheDir = getCacheDir() + "/nix/gitv2/" + hashString(htSHA256, uri).to_string(Base32, false);
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if (!pathExists(cacheDir)) {
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createDirs(dirOf(cacheDir));
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runProgram("git", true, { "init", "--bare", cacheDir });
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}
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Path localRefFile;
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if (ref->compare(0, 5, "refs/") == 0)
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localRefFile = cacheDir + "/" + *ref;
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else
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localRefFile = cacheDir + "/refs/heads/" + *ref;
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bool doFetch;
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time_t now = time(0);
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/* If a rev was specified, we need to fetch if it's not in the
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repo. */
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if (rev != "") {
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try {
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runProgram("git", true, { "-C", cacheDir, "cat-file", "-e", rev });
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doFetch = false;
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} catch (ExecError & e) {
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if (WIFEXITED(e.status)) {
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doFetch = true;
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} else {
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throw;
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}
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}
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} else {
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/* If the local ref is older than ‘tarball-ttl’ seconds, do a
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git fetch to update the local ref to the remote ref. */
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struct stat st;
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doFetch = stat(localRefFile.c_str(), &st) != 0 ||
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(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now;
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}
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if (doFetch)
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{
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Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Git repository '%s'", uri));
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// FIXME: git stderr messes up our progress indicator, so
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// we're using --quiet for now. Should process its stderr.
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runProgram("git", true, { "-C", cacheDir, "fetch", "--quiet", "--force", "--", uri, fmt("%s:%s", *ref, *ref) });
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struct timeval times[2];
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times[0].tv_sec = now;
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times[0].tv_usec = 0;
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times[1].tv_sec = now;
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times[1].tv_usec = 0;
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utimes(localRefFile.c_str(), times);
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}
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// FIXME: check whether rev is an ancestor of ref.
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GitInfo gitInfo;
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gitInfo.rev = rev != "" ? rev : chomp(readFile(localRefFile));
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gitInfo.shortRev = std::string(gitInfo.rev, 0, 7);
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printTalkative("using revision %s of repo '%s'", gitInfo.rev, uri);
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std::string storeLinkName = hashString(htSHA512, name + std::string("\0"s) + gitInfo.rev).to_string(Base32, false);
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Path storeLink = cacheDir + "/" + storeLinkName + ".link";
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PathLocks storeLinkLock({storeLink}, fmt("waiting for lock on '%1%'...", storeLink)); // FIXME: broken
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try {
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auto json = nlohmann::json::parse(readFile(storeLink));
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assert(json["name"] == name && json["rev"] == gitInfo.rev);
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gitInfo.storePath = json["storePath"];
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if (store->isValidPath(store->parseStorePath(gitInfo.storePath))) {
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gitInfo.revCount = json["revCount"];
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return gitInfo;
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}
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} catch (SysError & e) {
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if (e.errNo != ENOENT) throw;
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}
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auto source = sinkToSource([&](Sink & sink) {
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RunOptions gitOptions("git", { "-C", cacheDir, "archive", gitInfo.rev });
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gitOptions.standardOut = &sink;
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runProgram2(gitOptions);
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});
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Path tmpDir = createTempDir();
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AutoDelete delTmpDir(tmpDir, true);
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unpackTarfile(*source, tmpDir);
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gitInfo.storePath = store->printStorePath(store->addToStore(name, tmpDir));
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gitInfo.revCount = std::stoull(runProgram("git", true, { "-C", cacheDir, "rev-list", "--count", gitInfo.rev }));
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nlohmann::json json;
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json["storePath"] = gitInfo.storePath;
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json["uri"] = uri;
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json["name"] = name;
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json["rev"] = gitInfo.rev;
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json["revCount"] = gitInfo.revCount;
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writeFile(storeLink, json.dump());
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return gitInfo;
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}
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static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Value & v)
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{
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std::string url;
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std::optional<std::string> ref;
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std::string rev;
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std::optional<Hash> rev;
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std::string name = "source";
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PathSet context;
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@ -213,7 +28,7 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
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else if (n == "ref")
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ref = state.forceStringNoCtx(*attr.value, *attr.pos);
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else if (n == "rev")
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rev = state.forceStringNoCtx(*attr.value, *attr.pos);
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rev = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA1);
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else if (n == "name")
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name = state.forceStringNoCtx(*attr.value, *attr.pos);
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else
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@ -230,17 +45,35 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
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// whitelist. Ah well.
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state.checkURI(url);
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auto gitInfo = exportGit(state.store, url, ref, rev, name);
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if (evalSettings.pureEval && !rev)
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throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
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auto parsedUrl = parseURL(
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url.find("://") != std::string::npos
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? "git+" + url
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: "git+file://" + url);
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if (ref) parsedUrl.query.insert_or_assign("ref", *ref);
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if (rev) parsedUrl.query.insert_or_assign("rev", rev->gitRev());
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// FIXME: use name
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auto input = fetchers::inputFromURL(parsedUrl);
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auto [tree, input2] = input->fetchTree(state.store);
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state.mkAttrs(v, 8);
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mkString(*state.allocAttr(v, state.sOutPath), gitInfo.storePath, PathSet({gitInfo.storePath}));
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mkString(*state.allocAttr(v, state.symbols.create("rev")), gitInfo.rev);
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mkString(*state.allocAttr(v, state.symbols.create("shortRev")), gitInfo.shortRev);
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mkInt(*state.allocAttr(v, state.symbols.create("revCount")), gitInfo.revCount);
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auto storePath = state.store->printStorePath(tree.storePath);
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mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
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// Backward compatibility: set 'rev' to
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// 0000000000000000000000000000000000000000 for a dirty tree.
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auto rev2 = input2->getRev().value_or(Hash(htSHA1));
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mkString(*state.allocAttr(v, state.symbols.create("rev")), rev2.gitRev());
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mkString(*state.allocAttr(v, state.symbols.create("shortRev")), rev2.gitShortRev());
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// Backward compatibility: set 'revCount' to 0 for a dirty tree.
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mkInt(*state.allocAttr(v, state.symbols.create("revCount")),
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tree.info.revCount.value_or(0));
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v.attrs->sort();
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if (state.allowedPaths)
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state.allowedPaths->insert(state.store->toRealPath(gitInfo.storePath));
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state.allowedPaths->insert(tree.actualPath);
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}
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static RegisterPrimOp r("fetchGit", 1, prim_fetchGit);
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|
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|
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@ -1,174 +1,18 @@
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#include "primops.hh"
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#include "eval-inline.hh"
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#include "download.hh"
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#include "store-api.hh"
|
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#include "pathlocks.hh"
|
||||
|
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#include <sys/time.h>
|
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#include "fetchers.hh"
|
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#include "url.hh"
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||||
|
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#include <regex>
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#include <nlohmann/json.hpp>
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||||
|
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using namespace std::string_literals;
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|
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namespace nix {
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|
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struct HgInfo
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||||
{
|
||||
Path storePath;
|
||||
std::string branch;
|
||||
std::string rev;
|
||||
uint64_t revCount = 0;
|
||||
};
|
||||
|
||||
std::regex commitHashRegex("^[0-9a-fA-F]{40}$");
|
||||
|
||||
HgInfo exportMercurial(ref<Store> store, const std::string & uri,
|
||||
std::string rev, const std::string & name)
|
||||
{
|
||||
if (evalSettings.pureEval && rev == "")
|
||||
throw Error("in pure evaluation mode, 'fetchMercurial' requires a Mercurial revision");
|
||||
|
||||
if (rev == "" && hasPrefix(uri, "/") && pathExists(uri + "/.hg")) {
|
||||
|
||||
bool clean = runProgram("hg", true, { "status", "-R", uri, "--modified", "--added", "--removed" }) == "";
|
||||
|
||||
if (!clean) {
|
||||
|
||||
/* This is an unclean working tree. So copy all tracked
|
||||
files. */
|
||||
|
||||
printTalkative("copying unclean Mercurial working tree '%s'", uri);
|
||||
|
||||
HgInfo hgInfo;
|
||||
hgInfo.rev = "0000000000000000000000000000000000000000";
|
||||
hgInfo.branch = chomp(runProgram("hg", true, { "branch", "-R", uri }));
|
||||
|
||||
auto files = tokenizeString<std::set<std::string>>(
|
||||
runProgram("hg", true, { "status", "-R", uri, "--clean", "--modified", "--added", "--no-status", "--print0" }), "\0"s);
|
||||
|
||||
PathFilter filter = [&](const Path & p) -> bool {
|
||||
assert(hasPrefix(p, uri));
|
||||
std::string file(p, uri.size() + 1);
|
||||
|
||||
auto st = lstat(p);
|
||||
|
||||
if (S_ISDIR(st.st_mode)) {
|
||||
auto prefix = file + "/";
|
||||
auto i = files.lower_bound(prefix);
|
||||
return i != files.end() && hasPrefix(*i, prefix);
|
||||
}
|
||||
|
||||
return files.count(file);
|
||||
};
|
||||
|
||||
hgInfo.storePath = store->printStorePath(store->addToStore("source", uri, true, htSHA256, filter));
|
||||
|
||||
return hgInfo;
|
||||
}
|
||||
}
|
||||
|
||||
if (rev == "") rev = "default";
|
||||
|
||||
Path cacheDir = fmt("%s/nix/hg/%s", getCacheDir(), hashString(htSHA256, uri).to_string(Base32, false));
|
||||
|
||||
Path stampFile = fmt("%s/.hg/%s.stamp", cacheDir, hashString(htSHA512, rev).to_string(Base32, false));
|
||||
|
||||
/* If we haven't pulled this repo less than ‘tarball-ttl’ seconds,
|
||||
do so now. */
|
||||
time_t now = time(0);
|
||||
struct stat st;
|
||||
if (stat(stampFile.c_str(), &st) != 0 ||
|
||||
(uint64_t) st.st_mtime + settings.tarballTtl <= (uint64_t) now)
|
||||
{
|
||||
/* Except that if this is a commit hash that we already have,
|
||||
we don't have to pull again. */
|
||||
if (!(std::regex_match(rev, commitHashRegex)
|
||||
&& pathExists(cacheDir)
|
||||
&& runProgram(
|
||||
RunOptions("hg", { "log", "-R", cacheDir, "-r", rev, "--template", "1" })
|
||||
.killStderr(true)).second == "1"))
|
||||
{
|
||||
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Mercurial repository '%s'", uri));
|
||||
|
||||
if (pathExists(cacheDir)) {
|
||||
try {
|
||||
runProgram("hg", true, { "pull", "-R", cacheDir, "--", uri });
|
||||
}
|
||||
catch (ExecError & e) {
|
||||
string transJournal = cacheDir + "/.hg/store/journal";
|
||||
/* hg throws "abandoned transaction" error only if this file exists */
|
||||
if (pathExists(transJournal)) {
|
||||
runProgram("hg", true, { "recover", "-R", cacheDir });
|
||||
runProgram("hg", true, { "pull", "-R", cacheDir, "--", uri });
|
||||
} else {
|
||||
throw ExecError(e.status, fmt("'hg pull' %s", statusToString(e.status)));
|
||||
}
|
||||
}
|
||||
} else {
|
||||
createDirs(dirOf(cacheDir));
|
||||
runProgram("hg", true, { "clone", "--noupdate", "--", uri, cacheDir });
|
||||
}
|
||||
}
|
||||
|
||||
writeFile(stampFile, "");
|
||||
}
|
||||
|
||||
auto tokens = tokenizeString<std::vector<std::string>>(
|
||||
runProgram("hg", true, { "log", "-R", cacheDir, "-r", rev, "--template", "{node} {rev} {branch}" }));
|
||||
assert(tokens.size() == 3);
|
||||
|
||||
HgInfo hgInfo;
|
||||
hgInfo.rev = tokens[0];
|
||||
hgInfo.revCount = std::stoull(tokens[1]);
|
||||
hgInfo.branch = tokens[2];
|
||||
|
||||
std::string storeLinkName = hashString(htSHA512, name + std::string("\0"s) + hgInfo.rev).to_string(Base32, false);
|
||||
Path storeLink = fmt("%s/.hg/%s.link", cacheDir, storeLinkName);
|
||||
|
||||
try {
|
||||
auto json = nlohmann::json::parse(readFile(storeLink));
|
||||
|
||||
assert(json["name"] == name && json["rev"] == hgInfo.rev);
|
||||
|
||||
hgInfo.storePath = json["storePath"];
|
||||
|
||||
if (store->isValidPath(store->parseStorePath(hgInfo.storePath))) {
|
||||
printTalkative("using cached Mercurial store path '%s'", hgInfo.storePath);
|
||||
return hgInfo;
|
||||
}
|
||||
|
||||
} catch (SysError & e) {
|
||||
if (e.errNo != ENOENT) throw;
|
||||
}
|
||||
|
||||
Path tmpDir = createTempDir();
|
||||
AutoDelete delTmpDir(tmpDir, true);
|
||||
|
||||
runProgram("hg", true, { "archive", "-R", cacheDir, "-r", rev, tmpDir });
|
||||
|
||||
deletePath(tmpDir + "/.hg_archival.txt");
|
||||
|
||||
hgInfo.storePath = store->printStorePath(store->addToStore(name, tmpDir));
|
||||
|
||||
nlohmann::json json;
|
||||
json["storePath"] = hgInfo.storePath;
|
||||
json["uri"] = uri;
|
||||
json["name"] = name;
|
||||
json["branch"] = hgInfo.branch;
|
||||
json["rev"] = hgInfo.rev;
|
||||
json["revCount"] = hgInfo.revCount;
|
||||
|
||||
writeFile(storeLink, json.dump());
|
||||
|
||||
return hgInfo;
|
||||
}
|
||||
|
||||
static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * args, Value & v)
|
||||
{
|
||||
std::string url;
|
||||
std::string rev;
|
||||
std::optional<Hash> rev;
|
||||
std::optional<std::string> ref;
|
||||
std::string name = "source";
|
||||
PathSet context;
|
||||
|
||||
|
|
@ -182,8 +26,15 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
|
|||
string n(attr.name);
|
||||
if (n == "url")
|
||||
url = state.coerceToString(*attr.pos, *attr.value, context, false, false);
|
||||
else if (n == "rev")
|
||||
rev = state.forceStringNoCtx(*attr.value, *attr.pos);
|
||||
else if (n == "rev") {
|
||||
// Ugly: unlike fetchGit, here the "rev" attribute can
|
||||
// be both a revision or a branch/tag name.
|
||||
auto value = state.forceStringNoCtx(*attr.value, *attr.pos);
|
||||
if (std::regex_match(value, revRegex))
|
||||
rev = Hash(value, htSHA1);
|
||||
else
|
||||
ref = value;
|
||||
}
|
||||
else if (n == "name")
|
||||
name = state.forceStringNoCtx(*attr.value, *attr.pos);
|
||||
else
|
||||
|
|
@ -200,18 +51,36 @@ static void prim_fetchMercurial(EvalState & state, const Pos & pos, Value * * ar
|
|||
// whitelist. Ah well.
|
||||
state.checkURI(url);
|
||||
|
||||
auto hgInfo = exportMercurial(state.store, url, rev, name);
|
||||
if (evalSettings.pureEval && !rev)
|
||||
throw Error("in pure evaluation mode, 'fetchMercurial' requires a Mercurial revision");
|
||||
|
||||
auto parsedUrl = parseURL(
|
||||
url.find("://") != std::string::npos
|
||||
? "hg+" + url
|
||||
: "hg+file://" + url);
|
||||
if (rev) parsedUrl.query.insert_or_assign("rev", rev->gitRev());
|
||||
if (ref) parsedUrl.query.insert_or_assign("ref", *ref);
|
||||
// FIXME: use name
|
||||
auto input = fetchers::inputFromURL(parsedUrl);
|
||||
|
||||
auto [tree, input2] = input->fetchTree(state.store);
|
||||
|
||||
state.mkAttrs(v, 8);
|
||||
mkString(*state.allocAttr(v, state.sOutPath), hgInfo.storePath, PathSet({hgInfo.storePath}));
|
||||
mkString(*state.allocAttr(v, state.symbols.create("branch")), hgInfo.branch);
|
||||
mkString(*state.allocAttr(v, state.symbols.create("rev")), hgInfo.rev);
|
||||
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), std::string(hgInfo.rev, 0, 12));
|
||||
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), hgInfo.revCount);
|
||||
auto storePath = state.store->printStorePath(tree.storePath);
|
||||
mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
|
||||
if (input2->getRef())
|
||||
mkString(*state.allocAttr(v, state.symbols.create("branch")), *input2->getRef());
|
||||
// Backward compatibility: set 'rev' to
|
||||
// 0000000000000000000000000000000000000000 for a dirty tree.
|
||||
auto rev2 = input2->getRev().value_or(Hash(htSHA1));
|
||||
mkString(*state.allocAttr(v, state.symbols.create("rev")), rev2.gitRev());
|
||||
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), std::string(rev2.gitRev(), 0, 12));
|
||||
if (tree.info.revCount)
|
||||
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *tree.info.revCount);
|
||||
v.attrs->sort();
|
||||
|
||||
if (state.allowedPaths)
|
||||
state.allowedPaths->insert(state.store->toRealPath(hgInfo.storePath));
|
||||
state.allowedPaths->insert(tree.actualPath);
|
||||
}
|
||||
|
||||
static RegisterPrimOp r("fetchMercurial", 1, prim_fetchMercurial);
|
||||
|
|
|
|||
165
src/libexpr/primops/fetchTree.cc
Normal file
165
src/libexpr/primops/fetchTree.cc
Normal file
|
|
@ -0,0 +1,165 @@
|
|||
#include "primops.hh"
|
||||
#include "eval-inline.hh"
|
||||
#include "store-api.hh"
|
||||
#include "fetchers.hh"
|
||||
#include "download.hh"
|
||||
|
||||
#include <ctime>
|
||||
#include <iomanip>
|
||||
|
||||
namespace nix {
|
||||
|
||||
void emitTreeAttrs(
|
||||
EvalState & state,
|
||||
const fetchers::Tree & tree,
|
||||
std::shared_ptr<const fetchers::Input> input,
|
||||
Value & v)
|
||||
{
|
||||
state.mkAttrs(v, 8);
|
||||
|
||||
auto storePath = state.store->printStorePath(tree.storePath);
|
||||
|
||||
mkString(*state.allocAttr(v, state.sOutPath), storePath, PathSet({storePath}));
|
||||
|
||||
assert(tree.info.narHash);
|
||||
mkString(*state.allocAttr(v, state.symbols.create("narHash")),
|
||||
tree.info.narHash.to_string(SRI));
|
||||
|
||||
if (input->getRev()) {
|
||||
mkString(*state.allocAttr(v, state.symbols.create("rev")), input->getRev()->gitRev());
|
||||
mkString(*state.allocAttr(v, state.symbols.create("shortRev")), input->getRev()->gitShortRev());
|
||||
}
|
||||
|
||||
if (tree.info.revCount)
|
||||
mkInt(*state.allocAttr(v, state.symbols.create("revCount")), *tree.info.revCount);
|
||||
|
||||
if (tree.info.lastModified)
|
||||
mkString(*state.allocAttr(v, state.symbols.create("lastModified")),
|
||||
fmt("%s", std::put_time(std::gmtime(&*tree.info.lastModified), "%Y%m%d%H%M%S")));
|
||||
|
||||
v.attrs->sort();
|
||||
}
|
||||
|
||||
static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, Value & v)
|
||||
{
|
||||
settings.requireExperimentalFeature("flakes");
|
||||
|
||||
std::shared_ptr<const fetchers::Input> input;
|
||||
PathSet context;
|
||||
|
||||
state.forceValue(*args[0]);
|
||||
|
||||
if (args[0]->type == tAttrs) {
|
||||
state.forceAttrs(*args[0], pos);
|
||||
|
||||
fetchers::Attrs attrs;
|
||||
|
||||
for (auto & attr : *args[0]->attrs) {
|
||||
state.forceValue(*attr.value);
|
||||
if (attr.value->type == tString)
|
||||
attrs.emplace(attr.name, attr.value->string.s);
|
||||
else if (attr.value->type == tBool)
|
||||
attrs.emplace(attr.name, attr.value->boolean);
|
||||
else
|
||||
throw TypeError("fetchTree argument '%s' is %s while a string or Boolean is expected",
|
||||
attr.name, showType(*attr.value));
|
||||
}
|
||||
|
||||
if (!attrs.count("type"))
|
||||
throw Error("attribute 'type' is missing in call to 'fetchTree', at %s", pos);
|
||||
|
||||
input = fetchers::inputFromAttrs(attrs);
|
||||
} else
|
||||
input = fetchers::inputFromURL(state.coerceToString(pos, *args[0], context, false, false));
|
||||
|
||||
if (evalSettings.pureEval && !input->isImmutable())
|
||||
throw Error("in pure evaluation mode, 'fetchTree' requires an immutable input");
|
||||
|
||||
// FIXME: use fetchOrSubstituteTree
|
||||
auto [tree, input2] = input->fetchTree(state.store);
|
||||
|
||||
if (state.allowedPaths)
|
||||
state.allowedPaths->insert(tree.actualPath);
|
||||
|
||||
emitTreeAttrs(state, tree, input2, v);
|
||||
}
|
||||
|
||||
static RegisterPrimOp r("fetchTree", 1, prim_fetchTree);
|
||||
|
||||
static void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
|
||||
const string & who, bool unpack, std::string name)
|
||||
{
|
||||
std::optional<std::string> url;
|
||||
std::optional<Hash> expectedHash;
|
||||
|
||||
state.forceValue(*args[0]);
|
||||
|
||||
if (args[0]->type == tAttrs) {
|
||||
|
||||
state.forceAttrs(*args[0], pos);
|
||||
|
||||
for (auto & attr : *args[0]->attrs) {
|
||||
string n(attr.name);
|
||||
if (n == "url")
|
||||
url = state.forceStringNoCtx(*attr.value, *attr.pos);
|
||||
else if (n == "sha256")
|
||||
expectedHash = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
|
||||
else if (n == "name")
|
||||
name = state.forceStringNoCtx(*attr.value, *attr.pos);
|
||||
else
|
||||
throw EvalError("unsupported argument '%s' to '%s', at %s",
|
||||
attr.name, who, attr.pos);
|
||||
}
|
||||
|
||||
if (!url)
|
||||
throw EvalError("'url' argument required, at %s", pos);
|
||||
|
||||
} else
|
||||
url = state.forceStringNoCtx(*args[0], pos);
|
||||
|
||||
url = resolveUri(*url);
|
||||
|
||||
state.checkURI(*url);
|
||||
|
||||
if (name == "")
|
||||
name = baseNameOf(*url);
|
||||
|
||||
if (evalSettings.pureEval && !expectedHash)
|
||||
throw Error("in pure evaluation mode, '%s' requires a 'sha256' argument", who);
|
||||
|
||||
auto storePath =
|
||||
unpack
|
||||
? fetchers::downloadTarball(state.store, *url, name, (bool) expectedHash).storePath
|
||||
: fetchers::downloadFile(state.store, *url, name, (bool) expectedHash).storePath;
|
||||
|
||||
auto path = state.store->toRealPath(storePath);
|
||||
|
||||
if (expectedHash) {
|
||||
auto hash = unpack
|
||||
? state.store->queryPathInfo(storePath)->narHash
|
||||
: hashFile(htSHA256, path);
|
||||
if (hash != *expectedHash)
|
||||
throw Error((unsigned int) 102, "hash mismatch in file downloaded from '%s':\n wanted: %s\n got: %s",
|
||||
*url, expectedHash->to_string(), hash.to_string());
|
||||
}
|
||||
|
||||
if (state.allowedPaths)
|
||||
state.allowedPaths->insert(path);
|
||||
|
||||
mkString(v, path, PathSet({path}));
|
||||
}
|
||||
|
||||
static void prim_fetchurl(EvalState & state, const Pos & pos, Value * * args, Value & v)
|
||||
{
|
||||
fetch(state, pos, args, v, "fetchurl", false, "");
|
||||
}
|
||||
|
||||
static void prim_fetchTarball(EvalState & state, const Pos & pos, Value * * args, Value & v)
|
||||
{
|
||||
fetch(state, pos, args, v, "fetchTarball", true, "source");
|
||||
}
|
||||
|
||||
static RegisterPrimOp r2("__fetchurl", 1, prim_fetchurl);
|
||||
static RegisterPrimOp r3("fetchTarball", 1, prim_fetchTarball);
|
||||
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue