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// file : bpkg/rep-list.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bpkg/rep-list.hxx>
#include <set>
#include <iostream> // cout
#include <bpkg/package.hxx>
#include <bpkg/package-odb.hxx>
#include <bpkg/database.hxx>
#include <bpkg/diagnostics.hxx>
using namespace std;
namespace bpkg
{
// Print the repository dependencies, recursively.
//
// Each line has the following form:
//
// [(complement|prerequisite) ]<name> <location>
//
// and is indented with 2 additional spaces for each recursion level.
//
// Note that we can end up with a repository dependency cycle via
// prerequisites. Thus we need to make sure that the repository is not in
// the dependency chain yet.
//
using repositories = set<reference_wrapper<const shared_ptr<repository>>,
compare_reference_target>;
static void
print_dependencies (const rep_list_options& o,
const shared_ptr<repository>& r,
string& indent,
repositories& chain)
{
assert (!r->name.empty ()); // Can't be the root repository.
if (!chain.insert (r).second) // Is already in the chain.
return;
indent += " ";
if (o.complements ())
{
for (const lazy_shared_ptr<repository>& rp: r->complements)
{
// Skip the root complement (see rep_fetch() for details).
//
if (rp.object_id () == "")
continue;
shared_ptr<repository> r (rp.load ());
cout << indent << "complement "
<< r->location.canonical_name () << " " << r->location << endl;
print_dependencies (o, r, indent, chain);
}
}
if (o.prerequisites ())
{
for (const lazy_weak_ptr<repository>& rp: r->prerequisites)
{
shared_ptr<repository> r (rp.load ());
cout << indent << "prerequisite "
<< r->location.canonical_name () << " " << r->location << endl;
print_dependencies (o, r, indent, chain);
}
}
indent.resize (indent.size () - 2);
chain.erase (r);
}
static inline void
print_dependencies (const rep_list_options& o,
const shared_ptr<repository>& r)
{
string indent;
repositories chain;
print_dependencies (o, r, indent, chain);
}
int
rep_list (const rep_list_options& o, cli::scanner& args)
{
tracer trace ("rep_list");
dir_path c (o.directory ());
l4 ([&]{trace << "configuration: " << c;});
if (args.more ())
fail << "unexpected argument '" << args.next () << "'" <<
info << "run 'bpkg help rep-list' for more information";
database db (open (c, trace));
transaction t (db);
session s; // Repository dependencies can have cycles.
shared_ptr<repository> root (db.load<repository> (""));
for (const lazy_shared_ptr<repository>& rp: root->complements)
{
shared_ptr<repository> r (rp.load ());
cout << r->location.canonical_name () << " " << r->location << endl;
if (o.complements () || o.prerequisites ())
print_dependencies (o, r);
}
t.commit ();
return 0;
}
}
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