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// file : bpkg/satisfaction.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <bpkg/satisfaction>
#include <butl/process>
#include <butl/fdstream>
#include <bpkg/utility>
#include <bpkg/package-odb>
#include <bpkg/diagnostics>
using namespace std;
using namespace butl;
namespace bpkg
{
bool
satisfies (const version& v, const dependency_constraint& c)
{
assert (!c.empty ());
if (v == wildcard_version)
return true;
bool s (true);
// See notes in pkg-build:find_available() on ignoring revision in
// comparison.
//
if (c.min_version)
{
int i (v.compare (*c.min_version, c.min_version->revision == 0));
s = c.min_open ? i > 0 : i >= 0;
}
if (s && c.max_version)
{
int i (v.compare (*c.max_version, c.max_version->revision == 0));
s = c.max_open ? i < 0 : i <= 0;
}
return s;
}
bool
satisfies (const dependency_constraint& l, const dependency_constraint& r)
{
assert (!l.empty () && !r.empty ());
// Note: the revision ignoring logic is still unclear/unimplemented. It
// seems it will be specific to each case below.
//
bool s (false);
if (l.min_version)
{
if (r.min_version)
{
int i (l.min_version->compare (*r.min_version, false));
if (l.min_open)
// Doesn't matter if r is min_open or not.
//
s = i >= 0;
else
s = r.min_open ? i > 0 : i >= 0;
}
else
s = true; // Doesn't matter what l.min_version is.
}
else
s = !r.min_version;
if (s)
{
if (l.max_version)
{
if (r.max_version)
{
int i (l.max_version->compare (*r.max_version, false));
if (l.max_open)
// Doesn't matter if r is max_open or not.
//
s = i <= 0;
else
s = r.max_open ? i < 0 : i <= 0;
}
else
{
// Doesn't matter what l.max_version is, so leave s to be true.
}
}
else
s = !r.max_version;
}
return s;
}
static version build2_version;
void
satisfy_build2 (const common_options& co,
const string& pkg,
const dependency& d)
{
assert (d.name == "build2");
// Extract, parse, and cache build2 version string.
//
if (build2_version.empty ())
{
const char* args[] = {name_b (co), "--version", nullptr};
try
{
process_path pp (process::path_search (args[0], exec_dir));
if (verb >= 3)
print_process (args);
process pr (pp, args, 0, -1); // Redirect STDOUT to pipe.
string l;
try
{
ifdstream is (move (pr.in_ofd), fdstream_mode::skip);
getline (is, l);
is.close ();
if (pr.wait () && l.compare (0, 7, "build2 ") == 0)
{
try
{
build2_version = version (string (l, 7));
}
catch (const invalid_argument&) {} // Fall through.
}
// Fall through.
}
catch (const io_error&)
{
pr.wait ();
// Fall through.
}
if (build2_version.empty ())
fail << "unable to determine build2 version of " << args[0];
}
catch (const process_error& e)
{
error << "unable to execute " << args[0] << ": " << e;
if (e.child)
exit (1);
throw failed ();
}
}
if (!satisfies (build2_version, d.constraint))
fail << "unable to satisfy constraint (" << d << ") for package "
<< pkg <<
info << "available build2 version is " << build2_version;
}
static version bpkg_version;
void
satisfy_bpkg (const common_options&, const string& pkg, const dependency& d)
{
assert (d.name == "bpkg");
// Parse and cache bpkg version string.
//
if (bpkg_version.empty ())
bpkg_version = version (BPKG_VERSION_STR);
if (!satisfies (bpkg_version, d.constraint))
fail << "unable to satisfy constraint (" << d << ") for package "
<< pkg <<
info << "available bpkg version is " << bpkg_version;
}
}
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