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// file : bpkg/cfg-fetch.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bpkg/cfg-fetch>
#include <fstream>
#include <stdexcept>
#include <bpkg/manifest>
#include <bpkg/fetch>
#include <bpkg/types>
#include <bpkg/package>
#include <bpkg/package-odb>
#include <bpkg/utility>
#include <bpkg/database>
#include <bpkg/diagnostics>
using namespace std;
using namespace butl;
namespace bpkg
{
static void
cfg_fetch (const common_options& co,
transaction& t,
const shared_ptr<repository>& r)
{
tracer trace ("cfg_fetch(rep)");
database& db (t.database ());
tracer_guard tg (db, trace);
const repository_location& rl (r->location);
level4 ([&]{trace << r->name << " " << rl;});
assert (rl.absolute () || rl.remote ());
// The fetch_*() functions below will be quiet at level 1, which
// can be quite confusing if the download hangs.
//
if (verb >= (rl.remote () ? 1 : 2))
text << "fetching " << r->name;
r->fetched = true; // Mark as being fetched.
// Load the 'repositories' file and use it to populate the
// prerequisite and complement repository sets.
//
repository_manifests rms (fetch_repositories (co, rl, true));
for (repository_manifest& rm: rms)
{
repository_role rr (rm.effective_role ());
if (rr == repository_role::base)
continue; // Entry for this repository.
// If the location is relative, complete it using this repository
// as a base.
//
if (rm.location.relative ())
{
try
{
rm.location = repository_location (rm.location, rl);
}
catch (const invalid_argument& e)
{
fail << "invalid relative repository location '" << rm.location
<< "': " << e.what () <<
info << "base repository location is " << rl;
}
}
// We might already have this repository in the database.
//
shared_ptr<repository> pr (
db.find<repository> (
rm.location.canonical_name ()));
if (pr == nullptr)
{
pr = make_shared<repository> (move (rm.location));
db.persist (pr); // Enter into session, important if recursive.
}
// Load the prerequisite repository unless it has already been
// (or is already being) fetched.
//
if (!pr->fetched)
cfg_fetch (co, t, pr);
// @@ What if we have duplicated? Ideally, we would like to check
// this once and as early as possible. The original idea was to
// do it during manifest parsing and serialization. But at that
// stage we have no way of completing relative locations (which
// is required to calculate canonical names). Current thinking is
// that we should have something like rep-verify (similar to
// pkg-verify) that performs (potentially expensive) repository
// verifications, including making sure prerequisites can be
// satisfied from the listed repositories, etc. Perhaps we can
// also re-use some of that functionality here. I.e., instead of
// calling the "naked" fetch_repositories() above, we will call
// a function from rep-verify that will perform extra verifications.
//
// @@ Also check for self-prerequisite.
//
switch (rr)
{
case repository_role::complement:
{
level4 ([&]{trace << pr->name << " complement of " << r->name;});
r->complements.insert (lazy_shared_ptr<repository> (db, pr));
break;
}
case repository_role::prerequisite:
{
level4 ([&]{trace << pr->name << " prerequisite of " << r->name;});
r->prerequisites.insert (lazy_weak_ptr<repository> (db, pr));
break;
}
case repository_role::base:
assert (false);
}
}
// Load the 'packages' file.
//
// @@ We need to check that that 'repositories' file hasn't
// changed since.
//
package_manifests pms (fetch_packages (co, rl, true));
// "Suspend" session while persisting packages to reduce memory
// consumption.
//
session& s (session::current ());
session::reset_current ();
for (package_manifest& pm: pms)
{
// We might already have this package in the database.
//
bool persist (false);
shared_ptr<available_package> p (
db.find<available_package> (
available_package_id (pm.name, pm.version)));
if (p == nullptr)
{
p = make_shared<available_package> (move (pm));
persist = true;
}
// This repository shouldn't already be in the location set since
// that would mean it has already been loaded and we shouldn't be
// here.
//
p->locations.push_back (
package_location {lazy_shared_ptr<repository> (db, r),
move (*pm.location)});
if (persist)
db.persist (p);
else
db.update (p);
}
session::current (s); // "Resume".
// Save the changes to the repository object.
//
db.update (r);
}
int
cfg_fetch (const cfg_fetch_options& o, cli::scanner&)
{
tracer trace ("cfg_fetch");
dir_path c (o.directory ());
level4 ([&]{trace << "configuration: " << c;});
database db (open (c, trace));
transaction t (db.begin ());
session s; // Repository dependencies can have cycles.
shared_ptr<repository> root (db.load<repository> (""));
const auto& ua (root->complements); // User-added repositories.
if (ua.empty ())
fail << "configuration " << c << " has no repositories" <<
info << "use 'bpkg cfg-add' to add a repository";
// Clean repositories and available packages. At the end only
// repositories that were explicitly added by the user and the
// special root repository should remain.
//
db.erase_query<available_package> ();
for (shared_ptr<repository> r: pointer_result (db.query<repository> ()))
{
if (r == root)
{
level5 ([&]{trace << "skipping root";});
}
else if (ua.find (lazy_shared_ptr<repository> (db, r)) != ua.end ())
{
level4 ([&]{trace << "cleaning " << r->name;});
r->complements.clear ();
r->prerequisites.clear ();
r->fetched = false;
db.update (r);
}
else
{
level4 ([&]{trace << "erasing " << r->name;});
db.erase (r);
}
}
// Now recursively fetch prerequisite/complement repositories and
// their packages.
//
for (const lazy_shared_ptr<repository>& lp: ua)
cfg_fetch (o, t, lp.load ());
size_t rcount, pcount;
if (verb)
{
rcount = db.query_value<repository_count> ();
pcount = db.query_value<available_package_count> ();
}
t.commit ();
if (verb)
text << pcount << " package(s) in " << rcount << " repository(s)";
return 0;
}
}
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