mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-25 15:26:17 +02:00
5334c9c792
To be consistent with CLI, nix API and many other references. As part of this, we also converted it to a scoped enum. https://github.com/NixOS/nix/issues/8876
354 lines
11 KiB
C++
354 lines
11 KiB
C++
#include "fetchers.hh"
|
|
#include "processes.hh"
|
|
#include "users.hh"
|
|
#include "cache.hh"
|
|
#include "globals.hh"
|
|
#include "tarfile.hh"
|
|
#include "store-api.hh"
|
|
#include "url-parts.hh"
|
|
|
|
#include "fetch-settings.hh"
|
|
|
|
#include <sys/time.h>
|
|
|
|
using namespace std::string_literals;
|
|
|
|
namespace nix::fetchers {
|
|
|
|
static RunOptions hgOptions(const Strings & args)
|
|
{
|
|
auto env = getEnv();
|
|
// Set HGPLAIN: this means we get consistent output from hg and avoids leakage from a user or system .hgrc.
|
|
env["HGPLAIN"] = "";
|
|
|
|
return {
|
|
.program = "hg",
|
|
.searchPath = true,
|
|
.args = args,
|
|
.environment = env
|
|
};
|
|
}
|
|
|
|
// runProgram wrapper that uses hgOptions instead of stock RunOptions.
|
|
static std::string runHg(const Strings & args, const std::optional<std::string> & input = {})
|
|
{
|
|
RunOptions opts = hgOptions(args);
|
|
opts.input = input;
|
|
|
|
auto res = runProgram(std::move(opts));
|
|
|
|
if (!statusOk(res.first))
|
|
throw ExecError(res.first, "hg %1%", statusToString(res.first));
|
|
|
|
return res.second;
|
|
}
|
|
|
|
struct MercurialInputScheme : InputScheme
|
|
{
|
|
std::optional<Input> inputFromURL(const ParsedURL & url, bool requireTree) const override
|
|
{
|
|
if (url.scheme != "hg+http" &&
|
|
url.scheme != "hg+https" &&
|
|
url.scheme != "hg+ssh" &&
|
|
url.scheme != "hg+file") return {};
|
|
|
|
auto url2(url);
|
|
url2.scheme = std::string(url2.scheme, 3);
|
|
url2.query.clear();
|
|
|
|
Attrs attrs;
|
|
attrs.emplace("type", "hg");
|
|
|
|
for (auto &[name, value] : url.query) {
|
|
if (name == "rev" || name == "ref")
|
|
attrs.emplace(name, value);
|
|
else
|
|
url2.query.emplace(name, value);
|
|
}
|
|
|
|
attrs.emplace("url", url2.to_string());
|
|
|
|
return inputFromAttrs(attrs);
|
|
}
|
|
|
|
std::string_view schemeName() const override
|
|
{
|
|
return "hg";
|
|
}
|
|
|
|
StringSet allowedAttrs() const override
|
|
{
|
|
return {
|
|
"url",
|
|
"ref",
|
|
"rev",
|
|
"revCount",
|
|
"narHash",
|
|
"name",
|
|
};
|
|
}
|
|
|
|
std::optional<Input> inputFromAttrs(const Attrs & attrs) const override
|
|
{
|
|
parseURL(getStrAttr(attrs, "url"));
|
|
|
|
if (auto ref = maybeGetStrAttr(attrs, "ref")) {
|
|
if (!std::regex_match(*ref, refRegex))
|
|
throw BadURL("invalid Mercurial branch/tag name '%s'", *ref);
|
|
}
|
|
|
|
Input input;
|
|
input.attrs = attrs;
|
|
return input;
|
|
}
|
|
|
|
ParsedURL toURL(const Input & input) const override
|
|
{
|
|
auto url = parseURL(getStrAttr(input.attrs, "url"));
|
|
url.scheme = "hg+" + url.scheme;
|
|
if (auto rev = input.getRev()) url.query.insert_or_assign("rev", rev->gitRev());
|
|
if (auto ref = input.getRef()) url.query.insert_or_assign("ref", *ref);
|
|
return url;
|
|
}
|
|
|
|
Input applyOverrides(
|
|
const Input & input,
|
|
std::optional<std::string> ref,
|
|
std::optional<Hash> rev) const override
|
|
{
|
|
auto res(input);
|
|
if (rev) res.attrs.insert_or_assign("rev", rev->gitRev());
|
|
if (ref) res.attrs.insert_or_assign("ref", *ref);
|
|
return res;
|
|
}
|
|
|
|
std::optional<Path> getSourcePath(const Input & input) const override
|
|
{
|
|
auto url = parseURL(getStrAttr(input.attrs, "url"));
|
|
if (url.scheme == "file" && !input.getRef() && !input.getRev())
|
|
return url.path;
|
|
return {};
|
|
}
|
|
|
|
void putFile(
|
|
const Input & input,
|
|
const CanonPath & path,
|
|
std::string_view contents,
|
|
std::optional<std::string> commitMsg) const override
|
|
{
|
|
auto [isLocal, repoPath] = getActualUrl(input);
|
|
if (!isLocal)
|
|
throw Error("cannot commit '%s' to Mercurial repository '%s' because it's not a working tree", path, input.to_string());
|
|
|
|
auto absPath = CanonPath(repoPath) + path;
|
|
|
|
writeFile(absPath.abs(), contents);
|
|
|
|
// FIXME: shut up if file is already tracked.
|
|
runHg(
|
|
{ "add", absPath.abs() });
|
|
|
|
if (commitMsg)
|
|
runHg(
|
|
{ "commit", absPath.abs(), "-m", *commitMsg });
|
|
}
|
|
|
|
std::pair<bool, std::string> getActualUrl(const Input & input) const
|
|
{
|
|
auto url = parseURL(getStrAttr(input.attrs, "url"));
|
|
bool isLocal = url.scheme == "file";
|
|
return {isLocal, isLocal ? url.path : url.base};
|
|
}
|
|
|
|
std::pair<StorePath, Input> fetch(ref<Store> store, const Input & _input) override
|
|
{
|
|
Input input(_input);
|
|
|
|
auto name = input.getName();
|
|
|
|
auto [isLocal, actualUrl_] = getActualUrl(input);
|
|
auto actualUrl = actualUrl_; // work around clang bug
|
|
|
|
// FIXME: return lastModified.
|
|
|
|
// FIXME: don't clone local repositories.
|
|
|
|
if (!input.getRef() && !input.getRev() && isLocal && pathExists(actualUrl + "/.hg")) {
|
|
|
|
bool clean = runHg({ "status", "-R", actualUrl, "--modified", "--added", "--removed" }) == "";
|
|
|
|
if (!clean) {
|
|
|
|
/* This is an unclean working tree. So copy all tracked
|
|
files. */
|
|
|
|
if (!fetchSettings.allowDirty)
|
|
throw Error("Mercurial tree '%s' is unclean", actualUrl);
|
|
|
|
if (fetchSettings.warnDirty)
|
|
warn("Mercurial tree '%s' is unclean", actualUrl);
|
|
|
|
input.attrs.insert_or_assign("ref", chomp(runHg({ "branch", "-R", actualUrl })));
|
|
|
|
auto files = tokenizeString<std::set<std::string>>(
|
|
runHg({ "status", "-R", actualUrl, "--clean", "--modified", "--added", "--no-status", "--print0" }), "\0"s);
|
|
|
|
Path actualPath(absPath(actualUrl));
|
|
|
|
PathFilter filter = [&](const Path & p) -> bool {
|
|
assert(hasPrefix(p, actualPath));
|
|
std::string file(p, actualPath.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);
|
|
};
|
|
|
|
auto storePath = store->addToStore(input.getName(), actualPath, FileIngestionMethod::Recursive, HashAlgorithm::SHA256, filter);
|
|
|
|
return {std::move(storePath), input};
|
|
}
|
|
}
|
|
|
|
if (!input.getRef()) input.attrs.insert_or_assign("ref", "default");
|
|
|
|
auto checkHashType = [&](const std::optional<Hash> & hash)
|
|
{
|
|
if (hash.has_value() && hash->algo != HashAlgorithm::SHA1)
|
|
throw Error("Hash '%s' is not supported by Mercurial. Only sha1 is supported.", hash->to_string(HashFormat::Base16, true));
|
|
};
|
|
|
|
|
|
auto getLockedAttrs = [&]()
|
|
{
|
|
checkHashType(input.getRev());
|
|
|
|
return Attrs({
|
|
{"type", "hg"},
|
|
{"name", name},
|
|
{"rev", input.getRev()->gitRev()},
|
|
});
|
|
};
|
|
|
|
auto makeResult = [&](const Attrs & infoAttrs, StorePath && storePath)
|
|
-> std::pair<StorePath, Input>
|
|
{
|
|
assert(input.getRev());
|
|
assert(!_input.getRev() || _input.getRev() == input.getRev());
|
|
input.attrs.insert_or_assign("revCount", getIntAttr(infoAttrs, "revCount"));
|
|
return {std::move(storePath), input};
|
|
};
|
|
|
|
if (input.getRev()) {
|
|
if (auto res = getCache()->lookup(store, getLockedAttrs()))
|
|
return makeResult(res->first, std::move(res->second));
|
|
}
|
|
|
|
auto revOrRef = input.getRev() ? input.getRev()->gitRev() : *input.getRef();
|
|
|
|
Attrs unlockedAttrs({
|
|
{"type", "hg"},
|
|
{"name", name},
|
|
{"url", actualUrl},
|
|
{"ref", *input.getRef()},
|
|
});
|
|
|
|
if (auto res = getCache()->lookup(store, unlockedAttrs)) {
|
|
auto rev2 = Hash::parseAny(getStrAttr(res->first, "rev"), HashAlgorithm::SHA1);
|
|
if (!input.getRev() || input.getRev() == rev2) {
|
|
input.attrs.insert_or_assign("rev", rev2.gitRev());
|
|
return makeResult(res->first, std::move(res->second));
|
|
}
|
|
}
|
|
|
|
Path cacheDir = fmt("%s/nix/hg/%s", getCacheDir(), hashString(HashAlgorithm::SHA256, actualUrl).to_string(HashFormat::Base32, false));
|
|
|
|
/* If this is a commit hash that we already have, we don't
|
|
have to pull again. */
|
|
if (!(input.getRev()
|
|
&& pathExists(cacheDir)
|
|
&& runProgram(hgOptions({ "log", "-R", cacheDir, "-r", input.getRev()->gitRev(), "--template", "1" })).second == "1"))
|
|
{
|
|
Activity act(*logger, lvlTalkative, actUnknown, fmt("fetching Mercurial repository '%s'", actualUrl));
|
|
|
|
if (pathExists(cacheDir)) {
|
|
try {
|
|
runHg({ "pull", "-R", cacheDir, "--", actualUrl });
|
|
}
|
|
catch (ExecError & e) {
|
|
auto transJournal = cacheDir + "/.hg/store/journal";
|
|
/* hg throws "abandoned transaction" error only if this file exists */
|
|
if (pathExists(transJournal)) {
|
|
runHg({ "recover", "-R", cacheDir });
|
|
runHg({ "pull", "-R", cacheDir, "--", actualUrl });
|
|
} else {
|
|
throw ExecError(e.status, "'hg pull' %s", statusToString(e.status));
|
|
}
|
|
}
|
|
} else {
|
|
createDirs(dirOf(cacheDir));
|
|
runHg({ "clone", "--noupdate", "--", actualUrl, cacheDir });
|
|
}
|
|
}
|
|
|
|
auto tokens = tokenizeString<std::vector<std::string>>(
|
|
runHg({ "log", "-R", cacheDir, "-r", revOrRef, "--template", "{node} {rev} {branch}" }));
|
|
assert(tokens.size() == 3);
|
|
|
|
input.attrs.insert_or_assign("rev", Hash::parseAny(tokens[0], HashAlgorithm::SHA1).gitRev());
|
|
auto revCount = std::stoull(tokens[1]);
|
|
input.attrs.insert_or_assign("ref", tokens[2]);
|
|
|
|
if (auto res = getCache()->lookup(store, getLockedAttrs()))
|
|
return makeResult(res->first, std::move(res->second));
|
|
|
|
Path tmpDir = createTempDir();
|
|
AutoDelete delTmpDir(tmpDir, true);
|
|
|
|
runHg({ "archive", "-R", cacheDir, "-r", input.getRev()->gitRev(), tmpDir });
|
|
|
|
deletePath(tmpDir + "/.hg_archival.txt");
|
|
|
|
auto storePath = store->addToStore(name, tmpDir);
|
|
|
|
Attrs infoAttrs({
|
|
{"rev", input.getRev()->gitRev()},
|
|
{"revCount", (uint64_t) revCount},
|
|
});
|
|
|
|
if (!_input.getRev())
|
|
getCache()->add(
|
|
store,
|
|
unlockedAttrs,
|
|
infoAttrs,
|
|
storePath,
|
|
false);
|
|
|
|
getCache()->add(
|
|
store,
|
|
getLockedAttrs(),
|
|
infoAttrs,
|
|
storePath,
|
|
true);
|
|
|
|
return makeResult(infoAttrs, std::move(storePath));
|
|
}
|
|
|
|
std::optional<std::string> getFingerprint(ref<Store> store, const Input & input) const override
|
|
{
|
|
if (auto rev = input.getRev())
|
|
return rev->gitRev();
|
|
else
|
|
return std::nullopt;
|
|
}
|
|
};
|
|
|
|
static auto rMercurialInputScheme = OnStartup([] { registerInputScheme(std::make_unique<MercurialInputScheme>()); });
|
|
|
|
}
|