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-rw-r--r--src/libexpr/primops/fetchMercurial.cc216
1 files changed, 45 insertions, 171 deletions
diff --git a/src/libexpr/primops/fetchMercurial.cc b/src/libexpr/primops/fetchMercurial.cc
index db274fa4f..9bace8f89 100644
--- a/src/libexpr/primops/fetchMercurial.cc
+++ b/src/libexpr/primops/fetchMercurial.cc
@@ -1,174 +1,18 @@
#include "primops.hh"
#include "eval-inline.hh"
-#include "download.hh"
#include "store-api.hh"
-#include "pathlocks.hh"
-
-#include <sys/time.h>
+#include "fetchers.hh"
+#include "url.hh"
#include <regex>
-#include <nlohmann/json.hpp>
-
-using namespace std::string_literals;
-
namespace nix {
-struct HgInfo
-{
- 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;
@@ -182,16 +26,29 @@ 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
- throw EvalError("unsupported argument '%s' to 'fetchMercurial', at %s", attr.name, *attr.pos);
+ throw EvalError({
+ .hint = hintfmt("unsupported argument '%s' to 'fetchMercurial'", attr.name),
+ .nixCode = NixCode { .errPos = *attr.pos }
+ });
}
if (url.empty())
- throw EvalError(format("'url' argument required, at %1%") % pos);
+ throw EvalError({
+ .hint = hintfmt("'url' argument required"),
+ .nixCode = NixCode { .errPos = pos }
+ });
} else
url = state.coerceToString(pos, *args[0], context, false, false);
@@ -200,18 +57,35 @@ 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");
+
+ fetchers::Attrs attrs;
+ attrs.insert_or_assign("type", "hg");
+ attrs.insert_or_assign("url", url.find("://") != std::string::npos ? url : "file://" + url);
+ if (ref) attrs.insert_or_assign("ref", *ref);
+ if (rev) attrs.insert_or_assign("rev", rev->gitRev());
+ auto input = fetchers::inputFromAttrs(attrs);
+
+ // FIXME: use name
+ 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 23:27:15 +0000