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#include "primops.hh"
#include "eval-inline.hh"
#include "download.hh"
#include "store-api.hh"
namespace nix {
static void prim_fetchgit(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
// FIXME: cut&paste from fetch().
if (state.restricted) throw Error("‘fetchgit’ is not allowed in restricted mode");
std::string url;
std::string rev = "master";
state.forceValue(*args[0]);
if (args[0]->type == tAttrs) {
state.forceAttrs(*args[0], pos);
for (auto & attr : *args[0]->attrs) {
string name(attr.name);
if (name == "url")
url = state.forceStringNoCtx(*attr.value, *attr.pos);
else if (name == "rev")
rev = state.forceStringNoCtx(*attr.value, *attr.pos);
else
throw EvalError(format("unsupported argument ‘%1%’ to ‘fetchgit’, at %3%") % attr.name % attr.pos);
}
if (url.empty())
throw EvalError(format("‘url’ argument required, at %1%") % pos);
} else
url = state.forceStringNoCtx(*args[0], pos);
if (!isUri(url))
throw EvalError(format("‘%s’ is not a valid URI, at %s") % url % pos);
Path cacheDir = getCacheDir() + "/nix/git";
if (!pathExists(cacheDir)) {
createDirs(cacheDir);
runProgram("git", true, { "init", "--bare", cacheDir });
}
Activity act(*logger, lvlInfo, format("fetching Git repository ‘%s’") % url);
std::string localRef = "pid-" + std::to_string(getpid());
Path localRefFile = cacheDir + "/refs/heads/" + localRef;
runProgram("git", true, { "-C", cacheDir, "fetch", url, rev + ":" + localRef });
std::string commitHash = chomp(readFile(localRefFile));
unlink(localRefFile.c_str());
debug(format("got revision ‘%s’") % commitHash);
// FIXME: should pipe this, or find some better way to extract a
// revision.
auto tar = runProgram("git", true, { "-C", cacheDir, "archive", commitHash });
Path tmpDir = createTempDir();
AutoDelete delTmpDir(tmpDir, true);
runProgram("tar", true, { "x", "-C", tmpDir }, tar);
Path storePath = state.store->addToStore("git-export", tmpDir);
mkString(v, storePath, PathSet({storePath}));
}
static RegisterPrimOp r("__fetchgit", 1, prim_fetchgit);
}
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